daikin service manual 8
TRANSCRIPT
éâ-.≦齟Õ汲齠皈Î齔皈Ñ》ÍÒËÍÓËÍÏ
SiOCU05-001
K
Thank you very much for usual patronage to Daikin products.
We have completed and pleased to present the Oil Cooling Unit (Model 8) Service Manual.
We at Daikin provide an extensive lineup of models to respond to high-accuracy
temperature control and needs for energy saving with the Oil Cooling Unit and appreciate
your further loyal patronage.
This Service Manual includes information on troubleshooting and a variety of services.
Please make use of the Service Manual for your servicing of the Oil Cooling Unit.
After Sales Service Division
June 2005
Preface
Name of information Models listed Date of issue
Oil Cooling Unit
(Model 8)
Service Manual
• AKZ148 to 908
• AKZJ188 to 908
June
2005
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1 List of Models..................................... 6
2 Standard Specifications.................... 81. Principle of Oil Cooling Unit...................................82. List of Basic Performance/Specifications.............103. Operating Limits ..................................................14
3 Wiring Diagrams .............................. 15
4 Piping Diagrams .............................. 28
5 Control Panel ................................... 491. Name and Function of Each Part ........................492. Operation Procedure by Mode.............................51
2-1. Normal Mode.............................................512-2. Operation Setting Mode ............................522-3. Monitor Mode ............................................542-4. Timer Setting Mode ...................................542-5. Operation Lock Mode ................................542-6. Parameter Setting Mode ...........................552-7. Auto Tuning Mode......................................62
6 Functions.......................................... 641. Operation Flow Chart ..........................................642. Functions .............................................................653. List of Malfunctions/Warnings..............................66
7 Troubleshooting............................... 671. Troubleshooting According to Symptoms.............672. Equipment Data checking Procedure ..................683. Troubleshooting According to Malfunction Codes
.............................................................................693-1. Control Panel Operation Procedure ..........693-2. List of Malfunction Codes..........................703-3. Troubleshooting Flow Chart.......................71
8 Removing Procedure....................... 961. AKZ148 to 908.....................................................962. AKZJ188 to 908.................................................104
9 Replacement Procedure................ 1121. Procedure for Replacing Main PC Board...........1122. Procedure for Replacing EV Valve Main Unit ....113
10 Miscellaneous Reference Data ..... 1141. Thermistor Temperature/Resistance
Characteristics ...................................................1142. Refrigerant (R410A) Characteristics..................1143. Procedure for Mounting Optional Parts .............115
3-1. Machine Body Synchronization Thermistor/Optional Oil Temperature Thermistor ........115
3-2. Communication PC Board (Option).........116
OIL COOLING UNIT (MODEL 8) SERVICE MANUAL
1
Lis
t of
Mo
de
lsS
tandard S
pecificationsW
iring
D
iagra
ms
Pip
ing
D
iagra
ms
Co
ntro
l P
an
el
Fu
nctio
ns
TroubleshootingR
em
ovin
g
Pro
ced
ure
Replacem
ent P
rocedureM
iscellaneous R
eference Data
The specifications and others of this Service Manual are subject to change without notice for product improvements.
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2
SAFETY PRECAUTIONS Be sure to observe the precautions shown below.
The following section describes precautions to prevent personal injury or damage. Hazardous situations, which can occur due to mishandling of the equipment, are classified by the safety alert symbols shown below.
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3
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4
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5
MEMO
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1List of Models
6
TypeModel Name
Page Listed
Standard Type Individual Specification Standard Specification Wiring Diagram Piping Diagram
Recirculation type
Standard type
AKZ148 10 15 28
AKZ328 10 15 28
AKZ438 10 15 28
AKZ568 11 18 28
AKZ908 11 18 28
Equipped with circuit breaker
AKZ148-B 10 15 28
AKZ328-B 10 15 28
AKZ438-B 10 15 28
AKZ568-B 11 18 28
AKZ908-B 11 18 28
CE Safety Standard
compatible
AKZ148-C 10 15 28
AKZ328-C 10 15 28
AKZ438-C 10 15 28
AKZ568-C 11 18 28
AKZ908-C 11 18 28
Different Voltages compatible (with built-in transformer)
AKZ148-E1 10 16 28
AKZ148-E2 10 16 28
AKZ148-E3 10 16 28
AKZ328-E1 10 16 28
AKZ328-E2 10 16 28
AKZ328-E3 10 16 28
AKZ438-E1 10 16 28
AKZ438-E2 10 16 28
AKZ438-E3 10 16 28
AKZ568-E1 11 19 28
AKZ568-E2 11 19 28
AKZ568-E3 11 19 28
AKZ908-E1 11 19 30
AKZ908-E2 11 19 30
AKZ908-E3 11 19 30
Equipped with heater
AKZ148-H 10 17 38
AKZ328-H 10 17 38
AKZ438-H 10 17 38
AKZ568-H 11 20 40
AKZ908-H 11 20 42
Equipped with oil tank
AKZ148-T (1) 10 15 32
AKZ328-T (1) 10 15 32
AKZ438-T (1) 10 15 32
AKZ568-T 11 18 34
AKZ908-T 11 18 36
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List of Models
7
Lis
t of
Mo
de
ls
TypeModel Name
Page Listed
Standard Type Individual Specification Standard Specification Wiring Diagram Piping Diagram
Dipping Open type
Standard type
AKZJ188 12 21 46
AKZJ358 12 21 46
AKZJ458 12 21 46
AKZJ568 13 24 46
AKZJ908 13 24 46
Equipped with circuit breaker
AKZJ188-B 12 21 46
AKZJ358-B 12 21 46
AKZJ458-B 12 21 46
AKZJ568-B 13 24 46
AKZJ908-B 13 24 46
CE Safety Standard
compatible
AKZJ188-C 12 21 46
AKZJ358-C 12 21 46
AKZJ458-C 12 21 46
AKZJ568-C 13 24 46
AKZJ908-C 13 24 46
Different Voltages compatible
(equipped with transformer)
AKZJ188-E1 12 22 46
AKZJ188-E2 12 22 46
AKZJ188-E3 12 22 46
AKZJ358-E1 12 22 46
AKZJ358-E2 12 22 46
AKZJ358-E3 12 22 46
AKZJ458-E1 12 22 46
AKZJ458-E2 12 22 46
AKZJ458-E3 12 22 46
AKZJ568-E1 13 25 46
AKZJ568-E2 13 25 46
AKZJ568-E3 13 25 46
AKZJ908-E1 13 25 46
AKZJ908-E2 13 25 46
AKZJ908-E3 13 25 46
Equipped with heater
AKZJ188-H 12 23 46
AKZJ358-H 12 23 46
AKZJ458-H 12 23 46
AKZJ568-H 13 26 46
AKZJ908-H 13 26 46
×
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2 Standard Specifications
8
Principle of Oil Cooling Unit1
Through the compressor, the refrigerant gas turns to be high-temperature and high-pressure compressed gas to facilitate cooling and liquefaction with the condenser.
The condenser cools and condenses the high-temperature and high-pressure gas produced through the compressor with air to convert the gas into high-temperature and high-pressure liquid.
The pressure reducing mechanism presses and decompresses this high-temperature and high-pressure liquid to convert it into low-temperature and low-pressure liquid, thus facilitating evaporation with the cooler.
Through the cooler, the low-temperature and low-pressure gas produced through the pressure reducing mechanism draws heat from oil to evaporate (cool the oil), thus providing low-temperature and low-pressure gas.
The Oil Cooling Unit is a cooling unit using a refrigeration cycle shown in Figure above, which is different from air conditioners in the object to cool. The Oil Cooling Unit is subject to cooling of oil, while air conditioners are subject to cooling of air. Consequently, knowledge required for basic services is the same as that for air conditioners but different in some points particularly from the air conditioners. The following section describes these different points.
1. Functions of Electronic Expansion ValveThe electronic expansion valve is used for capacity control at a frequency below the minimum compressor operating frequency, thus having characteristics shown below.
q While in low capacity operation, the electronic expansion valve uses the low-pressure region, which no air conditioners use.
w The fully closed point of electronic expansion valve (fully closed pulse of EV valve) should be set with the PC board by each unit. (In order to replace the EV valve or PC board, pay attention to this point.)
2. Oil PumpSince the Oil Cooling Unit is subject to cooling of oil, an oil pump is incorporated in place of a fan on the indoor side. The following section describes the features of the oil pump.
q When the external resistance reaches 0.5 MPa or more, the relief valve will be activated.w Since the external resistance block (field piping) is an item to be designed by the user, attention should be paid.
3. Characteristics of Electrical SystemBasically, the electrical system is the same as that of air conditioners but has the following characteristics.
q The Oil Cooling Units has nothing equivalent to the operation switch. Be noted that the Oil Cooling Unit starts running as soon as the power supply turns ON. Normally, the Oil Cooling Unit exchanges signals with a machine tool and runs under ON-OFF control on the machine tool side.
w The Oil Cooling Unit has an enhanced readout function of internal product data. Refer to information in "7 Troubleshooting" to conduct servicing.
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Standard Specifications
9
Standard
Specifications
M M
For AKZ Series
For AKZJ Series
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2 Standard Specifications
10
2-1. AKZ Series
List of Basic Performance/Specifications20.5 1.2 1.5
AKZ148
-H-C-BStan-dard -T/-T1 *3
AKZ328 AKZ438
1.3/1.4 2.8/3.2
3-phase, 200/200 · 220VAC, 50/60 Hz
White
Shell end coil type
Cross fin coil type
φ 300 mm, 75 W
Trochoid pump
Propeller fan
0.4kW4P
Room temperature or unit temperature *5 (Factory set to Room temp. Mode 3)
inlet or outlet oil temperature (Factory set to inlet oil temperature)
-9.9 to +9.9 against reference temperature (Factory set to 0.0)
Inlet or outlet oil temperature
5 to 50
Overcurrent relay (pump motor), Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat,High oil temperature protection thermostat, Low oil temperature protection thermostat, Pump relief valve, Discharge pipe temperature thermostat,
Condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Boil-dry prevention switch (-H only)
Inverter control for Compressor revolutions + EV valve opening
5 to 45
5 to 50
1.4 to 200 (ISO VG2 to 32)
0.5 MPa or less
Within -30.7 kPa
Lubricating oil/Mineral oil based hydraulic fluid (However, not applicable to phosphate ester based hydraulic fluid, water, water-soluble liquid, chemicals, foods, fuels, cutting/grinding fluid, etc.)
Rc3/4
Rc1 1/4 Rc1 1/4Rc3/4 Rc3/4 Rc3/4 Rc3/4Rc1 1/4
Rc1/4 (Plug stop)
DC12/24V
3.8/4.3
1.20kVA/3.5A
12/14.4 24/28.8
0.5 0.6
1.70kVA/5.3A 2.31kVA/6.6A
1.32kVA/3.7A 1.73kVA/5.5A 2.35kVA/6.8A
1.33kVA/3.9A 1.75kVA/5.7A 2.45kVA/7.0A
0.49 0.72 0.98
62 65
0.4 kW or equivalent 0.75 kW or equivalent 1.1 kW or equivalent
Vertical 14.7 m/S2 (1.5G) 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)
10
-E *4 -H-C-BStan-dard -T/-T1 *3 -E *4 -H-C-BStan
-dard -T/-T1 *3 -E *4
10— — 10— — 10— —
950360440650360440 820360465/*3
950360440 1090360440790360440 1055360465/*3
1090360440 1290360440990360440 1225360465/*3
1290360440
6252 67 110 6858 88 116 7767 97 125
— 15 — — 30/20 — — 30/20 —
2.6kVA
*43-phase, 200/200 · 220VAC, 50/60 Hz *43-phase, 200/200 · 220VAC, 50/60 Hz *43-phase, 200/200 · 220VAC, 50/60 Hz
1
— 2.6kVA— 2.6kVA —
— — 1— — 1— —
Operating range
Power supply *2
Oil Cooling Unit equivalent horsepower (HP)
Transformer capacity
Coated color
Compressor (Hermetic DC swing type)
Evaporator
Refrigerant control
Applicable oil
Noise level (1 m from front, 1 m above: anechoic chamber equivalent)
Transportation vibration performance
Mass
Wiring circuit breaker (rated current)
Oil tank (capacity)Localprocurement*7
Wiring circuit breaker(rated current)
Condenser
Model name
Cooling capacity (50/60 Hz) *1
Heater
Circuit voltage
Max. power consumptionMax. current consumption
Fan
Oil pump
(Selectable)
Tem
perature control
Synchronizationtype
Fixed type
Type
Motor
Type
Motor
Reference
Subject to control
Subject to control
Main circuit
Operation circuit
200V 50Hz
200V 60Hz
220V 60Hz
Outline dimensions (HWD)
Refilling quantity of refrigerant (New refrigerant: R410A)*6
Emergency openingpressure
Discharge rate
Range
Sync. range
Safety devices
Room temperature
Inlet oil temperature
Oil viscosity
Pressure loss outside product
Connection piping
Oil outlet
Oil inlet
Oil drain
Dischargeside
Suction side
kW
kW
mm
L/min
MPa
K
˚C
kg
˚C
˚C
mm2/S
dB (A)
A
L
A
kg
Note) *1. The cooling capacity represents figures at a standard point(of inlet oil temperature: 35˚C, room temperature: 35˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%.
*2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended.
*3 The outline dimensions for T1 specification units are as shown below.AKZ148-T1: 810 360 535AKZ328-T1: 980 360 535AKZ438-T1: 1180 360 535
*4 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply. E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz
*5 The machine body synchronization thermistor, which is an optional part, is required.
*6 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant.
*7 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)
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Standard Specifications
11
Standard
Specifications
2.0 3.0
5.0/5.6 8.0/9.0
AKZ568 AKZ908
3.21kVA/9.4A 5.02kVA/15.2A
3.30kVA/9.5A 5.14kVA/15.6A
3.34kVA/9.2A 5.20kVA/14.5A
1.5 kW or equivalent 2.2 kW or equivalent
-H -T -E *3Stan-dard -B -C
1410470560 1375470580 13604705901110470560 1520560680 1485560700 14705606951220560620
115 130 18297
— 50 — — 70 —
150 160 210125
—
3-phase, 200/200 · 220VAC, 50/60 Hz *3 3-phase, 200/200 · 220VAC, 50/60 Hz
3-phase, 200/200 · 220VAC, 50/60 Hz
DC12/24V
White
Shell end coil type
Cross fin coil type
Propeller fan
0.75kW4P
Trochoid pump
30/36
0.6
Room temperature or unit temperature *4 (Factory set to Room temp. Mode 3)
inlet or outlet oil temperature (Factory set to inlet oil temperature)
-9.9 to +9.9 against reference temperature (Factory set to 0.0)
Inlet or outlet oil temperature
5 to 50
5 to 45
5 to 40
1.4 to 200 (ISO VG2 to 32)
0.5 MPa or less
Within -30.7 kPa
Lubricating oil/Mineral oil based hydraulic fluid (However, not applicable to phosphate ester based hydraulic fluid, water, water-soluble liquid, chemicals, foods, fuels, cutting/grinding fluid, etc.)
Rc 1 1/4
Rc 1 1/4
Rc1/4 (Plug stop)
Vertical 14.7 m/S2 (1.5G) 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)
Overcurrent relay (pump motor), Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat,High oil temperature protection thermostat, Low oil temperature protection thermostat, Pump relief valve, Discharge pipe temperature thermostat,
Condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Boil-dry prevention switch (-H only)
Inverter control for Compressor revolutions + EV valve opening
*3
— 5kVA — 6kVA
-H -T -E *3Stan-dard -B -C
2 —— 3 ——
φ 400mm, 90W4P φ 450mm, 150W4P
1.25 1.53
65 67
15 20
— 15 —— 20
Power supply *2
Oil Cooling Unit equivalent horsepower (HP)
Transformer capacity
Coated color
Compressor (Hermetic DC swing type)
Evaporator
Refrigerant control
Applicable oil
Noise level (1 m from front, 1 m above: anechoic chamber equivalent)
Transportation vibration performance
Mass
Wiring circuit breaker (rated current)
Oil tank (capacity)Localprocurement*7
Wiring circuit breaker(rated current)
Condenser
Model name
Cooling capacity (50/60 Hz) *1
Heater
Circuit voltage
Max. power consumptionMax. current consumption
Fan
Oil pump
(Selectable)
Tem
perature control
Synchronizationtype
Fixed type
Type
Motor
Type
Motor
Reference
Subject to control
Subject to control
Main circuit
Operation circuit
200V 50Hz
200V 60Hz
220V 60Hz
Outline dimensions (HWD)
Refilling quantity of refrigerant (New refrigerant: R410A) *5
Emergency openingpressure
Discharge rate
Range
Sync. range
Safety devices
Operating range
Room temperature
Inlet oil temperature
Oil viscosity
Pressure loss outside product
Connection piping
Oil outlet
Oil inlet
Oil drain
Dischargeside
Suction side
kW
kW
mm
L/min
MPa
K
˚C
kg
˚C
˚C
mm2/S
dB (A)
A
L
A
kg
Note) *1. The cooling capacity represents figures at a standard point (of inlet oil temperature: 35 ˚C, room temperature: 35 ˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%.
*2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended.*3 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply.
E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz
*4 The machine body synchronization thermistor, which is an optional part, is required.*5 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant.*6 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)
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2 Standard Specifications
12
2-2. AKZJ Series0.5 1.2 1.5
AKZJ188
-C-BStan-dard -H
AKZJ358 AKZJ458
1.6/1.8 3.2/3.5
3-phase, 200/200 · 220VAC, 50/60 Hz
DC12/24V
White
Open coil type
Cross fin coil type
φ 300mm, 75W
Propeller fan
1-pahse, 50W, 4P
Trochoid agitator
Room temperature or unit temperature *5 (Factory set to Room temp. Mode 3)
Tank liquid temperature
-9.9 to +9.9 against reference temperature (Factory set to 0.0)
Tank liquid temperature
5 to 50
5 to 45
5 to 50
0.5 to 200
62
Vertical 14.7 m/S2 (1.5G) 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)
10
Oil tank (400 mm or more in depth), Feed pump, Float switch, and return filter
Water-soluble cutting/grinding fluid, cutting/grinding oil, Lubricating oil, Hydraulic fluid, and Industrial water(However, not applicable to chemicals, foods, and fuels)
Inverter control for Compressor revolutions + EV valve opening
Fan motor inner thermostat, Agitator inner thermostat, Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat,High oil temperature protection thermostat, Low oil temperature protection thermostat, Discharge pipe temperature thermostat, condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, No-fuse circuit breaker (-B only),
High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Fuse (-H only)
4.2/4.5
0.4kW or equivalent 0.75kW or equivalent 1.1kW or equivalent
0.58
4138 103
—10— 10— 10—— —
4744 109 5653 118
0.81 1.15
-E *3 -C-BStan-dard -H -E *3 -C-BStan
-dard -H -E *3
*33-phase, 200/200 · 220VAC, 50/60 Hz *33-phase, 200/200 · 220VAC, 50/60 Hz *33-phase, 200/200 · 220VAC, 50/60 Hz
— 1 — — 1 — — 1 —
1.07kVA/3.1A 1.35kVA/5.7A Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
Same asStandard unit
1.76 kVA/5.2A 1.76 kVA/5.9A 1.94kVA/5.7A 1.94 kVA/5.9A
1.09kVA/3.2A 1.35kVA/5.6A 1.78 kVA/5.2A 1.78 kVA/5.8A 1.96kVA/5.7A 1.96 kVA/5.8A
1.07kVA/2.8A 1.62kVA/6.1A 1.79 kVA/4.9A 1.79 kVA/6.3A 1.98kVA/5.3A 1.98 kVA/6.3A
— 2.2 kVA — 2.2kVA — 2.2kVA
980360440 980450630 1120360440 1120450630 1320360440 1320450630
Power supply *2
Oil Cooling Unit equivalent horsepower (HP)
Transformer capacity
Coated color
Compressor (Hermetic DC swing type)
Evaporator
Refrigerant control
Applicable oil
Noise level (1 m from front, 1 m above: anechoic chamber equivalent)
Transportation vibration performance
Mass
Wiring circuit breaker (rated current)
Localprocurement *6
Other than wiring circuit breaker
Wiring circuit breaker(rated current)
Condenser
Model name
Cooling capacity (50/60 Hz) *1
Heater
Circuit voltage
Max. power consumptionMax. current consumption
Fan
(Selectable)
Tem
perature control
Synchronizationtype
Fixed type
Motor
Motor
Type
Type
Reference
Subject to control
Subject to control
Main circuit
Operation circuit
200V 50Hz
200V 60Hz
220V 60Hz
Outline dimensions (HWD)
Refilling quantity of refrigerant (New refrigerant: R410A) *5
Range
Sync. range
Safety devices
Operating range
Room temperature
Tank liquid temperature
Oil viscosity
Agitator
kW
kW
mm
K
˚C
kg
˚C
˚C
mm2/S
dB(A)
A
A
kg
Note) *1. The cooling capacity represents figures at a standard point (of inlet oil temperature: 35 ˚C, room temperature: 35 ˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%.
*2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended.*3 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply.
E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz
*4 The machine body synchronization thermistor, which is an optional part, is required.*5 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant.*6 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)
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Standard Specifications
13
Standard
Specifications
2.0
3-phase, 200/200 · 220VAC, 50/60 Hz
DC12/24V
Open coil type
Cross fin coil type
Propeller fan
1-pahse, 50W, 4P
Trochoid agitator
Room temperature or unit temperature *4 (Factory set to Room temp. Mode 3)
Tank liquid temperature
-9.9 to +9.9 against reference temperature (Factory set to 0.0)
Tank liquid temperature
5 to 50
5 to 45
5 to 50
0.5 to 200
Vertical 14.7 m/S2 (1.5G) 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)
Oil tank (400 mm or more in depth), Feed pump, Float switch, and return filter
Water-soluble cutting/grinding fluid, cutting/grinding oil, Lubricating oil, Hydraulic fluid, and Industrial water(However, not applicable to chemicals, foods, and fuels)
Inverter control for Compressor revolutions + EV valve opening
Fan motor inner thermostat, Agitator inner thermostat, Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat,High oil temperature protection thermostat, Low oil temperature protection thermostat, Discharge pipe temperature thermostat, condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, No-fuse circuit breaker (-B only),
High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Fuse (-H only)
White
3.0
5.0/5.6 8.0/9.0
1.5kW or equivalent 2.2kW or equivalent
φ 400 mm, 90 W 4P φ 450 mm, 150 W 4P
1.25 1.65
65 68
15
AKZJ568 AKZJ908
-H-C-BStandard -E *3 -H-C-BStandard -E *3
2— — 4— —
4.0kVA/11.4A3.3kVA/9.4A Same as Standard unit 7.5kVA/21.6A3.9kVA/11.2A Same as Standard unit
4.0kVA/11.4A3.3kVA/9.4A Same as Standard unit 7.5kVA/21.6A4.1kVA/11.7A Same as Standard unit
Same as Standard unit4.8kVA/12.5A3.4kVA/9.0A Same as Standard unit 9.0kVA/23.7A4.3kVA/11.2A
2208683 160 140132
203020
—— 15 —— 20
— 5kVA — 6kVA
1450470500 1450560710 1630560620 1630655830
3-phase, 200/200 · 220VAC, 50/60 Hz *3 3-phase, 200/200 · 220VAC, 50/60 Hz *3Power supply *2
Oil Cooling Unit equivalent horsepower (HP)
Transformer capacity
Coated color
Compressor (Hermetic DC swing type)
Evaporator
Refrigerant control
Applicable oil
Noise level (1 m from front, 1 m above: anechoic chamber equivalent)
Transportation vibration performance
Mass
Wiring circuit breaker (rated current)
Localprocurement *6
Other than wiring circuit breaker
Wiring circuit breaker(rated current)
Condenser
Model name
Cooling capacity (50/60 Hz) *1
Heater
Circuit voltage
Max. power consumptionMax. current consumption
Fan
(Selectable)
Tem
perature control
Synchronizationtype
Fixed type
Motor
Motor
Type
Type
Reference
Subject to control
Subject to control
Main circuit
Operation circuit
200V 50Hz
200V 60Hz
220V 60Hz
Outline dimensions (HWD)
Refilling quantity of refrigerant (New refrigerant: R410A) *5
Range
Sync. range
Safety devices
Operating range
Room temperature
Tank liquid temperature
Oil viscosity
Agitator
kW
kW
mm
K
˚C
kg
˚C
˚C
mm2/S
dB(A)
A
A
kg
Note) *1. The cooling capacity represents figures at a standard point (of inlet oil temperature: 35 ˚C, room temperature: 35 ˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%.
*2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended.*3 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply.
E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz
*4 The machine body synchronization thermistor, which is an optional part, is required.*5 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant.*6 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)
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2 Standard Specifications
14
3-1. Operating RangeThe Oil Cooling Unit has its operating limits.Be sure to use the Oil Cooling Unit in the range shown below.
Operating Limits3
3-2. Applicable Oil Since this Oil Cooling Unit is designed for lubricating oils and hydraulic fluid (of mineral oil base), the following oil (liquid) is not applicable.
1) Flame-resistant hydraulic fluid Phosphate ester base Chlorinated hydrocarbon base Water + Glycol base W/O, O/W emulsion base
2) Water and water-soluble liquid3) Chemical liquid and fluid food4) Cutting oil (fluid) and grinding oil (fluid)5) Fuels including kerosene, gasoline, and others
5 10 15 3520 30 40 50
Oil inlet temperature ()*
50
45
40
30
20
10
15
5
* "Tank liquid temperature" in the case of Dipping Open type (AKZJ Series)
Roo
m te
mpe
ratu
re (
)
Op e r a
t io n a l
Ra n g e
014_[2]-3使用限界&4内部構造.indd 2005/05/26, 18:2314
15
3 Wiring DiagramsW
iring
D
iagra
ms
1-1. AKZ148 (-B) (-C) (-T), AKZ328 (-B) (-C) (-T), AKZ438 (-B) (-C) (-T)
1925750R
AKZ Series1
Wiring Diagram
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3 Wiring Diagrams
16
1925778D
Wiring Diagram
1-2. AKZ148-E1/E2/E3, 328-E1/E2/E3, 438-E1/E2/E3
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Wiring Diagrams
17
Wirin
g
Dia
gra
ms
1925806D
Wiring Diagram
1-3. AKZ148-H/328-H/438-H
015-027_[3]電気配線図.indd 2005/05/26, 18:2417
3 Wiring Diagrams
18
1925775G
Wiring Diagram
1-4. AKZ568 (-B) (-C) (-T), 908 (-B), (-C), (-T)
015-027_[3]電気配線図.indd 2005/05/26, 18:2418
Wiring Diagrams
19
Wirin
g
Dia
gra
ms
1925799E
Wiring Diagram
1-5. AKZ568-E1/E2/E3, 908-E1/E2/E33
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3 Wiring Diagrams
20
1925814E
Wiring Diagram
1-6. AKZ568-H/908-H
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Wiring Diagrams
21
Wirin
g
Dia
gra
ms
1925776F
Wiring Diagram
2-1. AKZJ188 (-B) (-C), 358 (-B) (-C), 458 148 (-B) (-C)
AKZJ Series2
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3 Wiring Diagrams
22
1925796D
Wiring Diagram
2-2. AKZ188-E1/E2/E3, 358-E1/E2/E3, 458-E1/E2/E3
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Wiring Diagrams
23
Wirin
g
Dia
gra
ms
1925809C
Wiring Diagram
2-3. AKZJ188-H/358-H/458-H
015-027_[3]電気配線図.indd 2005/05/26, 18:2423
3 Wiring Diagrams
24
1925792D
Wiring Diagram
2-4. AKZJ568 (-B) (-C), 908 (-B), (-C)
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Wiring Diagrams
25
Wirin
g
Dia
gra
ms
1925815B
Wiring Diagram
2-5. AKZJ568-E1/E2/E3, 908-E1/E2/E33
015-027_[3]電気配線図.indd 2005/05/26, 18:2425
26
3 Wiring Diagrams
1925810E
Wiring Diagram
2-6. AKZJ568-H/908-H
015-027_[3]電気配線図.indd 2005/05/26, 18:2426
27
MEMO
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4 Piping Diagrams
28
1-1. AKZ148 to 568 (-B) (-C) (-E1) (-E2), (-E3)
AKZ Series1
No. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
11High pressure switch(-C only)
S3PHIn order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction.
12Compressor protection thermostat(-C only)
S2BWhen the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
20Pump outlet temperature thermistor
Th-10 Used to detect the oil pump outlet temperature.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharged from this oil drain for maintenance.)
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on pages 44 and 45.
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Piping Diagrams
29
Pip
ing
D
iagra
ms
HCY400646D
AKZ148 to 568 (-B) (-C) (-E1) (-E2), (-E3)
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4 Piping Diagrams
30
1-2. AKZ908 (-B) (-C) (-E1) (-E2), (-E3)No. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
11High pressure switch(-C only)
S3PHIn order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction.
12Compressor protection thermostat(-C only)
S2BWhen the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 45.
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Piping Diagrams
31
Pip
ing
D
iagra
ms
HCY400655B
AKZ908 (-B) (-C) (-E1) (-E2), (-E3)
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4 Piping Diagrams
32
1-3. AKZ148 to 438-TNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
20Pump outlet temperature thermistor
Th-10 Used to detect the oil pump outlet temperature.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22 Oil tank —Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system.
23Oil charge port & Air breather
—Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.
24 Oil level indicator — Used to indicate oil quantity in the oil tank.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 44.
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Piping Diagrams
33
Pip
ing
D
iagra
ms
HCY400650C
AKZ148 to 438-T
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4 Piping Diagrams
34
1-4. AKZ568-TNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
20Pump outlet temperature thermistor
Th-10 Used to detect the oil pump outlet temperature.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22 Oil tank —Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system.
23Oil charge port & Air breather
—Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.
24 Oil level indicator — Used to indicate oil quantity in the oil tank.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 45.
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Piping Diagrams
35
Pip
ing
D
iagra
ms
HCY400666B
AKZ568-T
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4 Piping Diagrams
36
1-5. AKZ908-TNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22 Oil tank —Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system.
23Oil charge port & Air breather
—Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.
24 Oil level indicator — Used to indicate oil quantity in the oil tank.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 45.
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Piping Diagrams
37
Pip
ing
D
iagra
ms
HCY400667A
AKZ908-T
028-037_[4]配管系統図.indd 2005/05/26, 18:2537
4 Piping Diagrams
38
1-6. AKZ148 to 438-HNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
20Pump outlet temperature thermistor
Th-10 Used to detect the oil pump outlet temperature.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22Boil-dry protection pressure switch
S4PHUsed to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction.
23Overheat prevention temperature thermostat
S4B1Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.
24 Heater J1H This is an electric heater used to heat oil.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
26 Angle check valve —This valve is a “resistor” so as not to malfunction the pressure switch.Without the angle check valve, the system may erroneously recognize that there is no oil to stop running due to malfunction “AA”.
*For the layout of parts, refer to information on page 44.
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Piping Diagrams
39
Pip
ing
D
iagra
ms
HCY400665C
AKZ148 to 438-H
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4 Piping Diagrams
40
1-7. AKZ568-HNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
20Pump outlet temperature thermistor
Th-10 Used to detect the oil pump outlet temperature.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22 Flow switch S4PHUsed to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction.
23Overheat prevention temperature switch
S4B1Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.
24 Heater J1H This is an electric heater used to heat oil.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 45.
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HCY400679A
AKZ568-H
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1-8. AKZ908-HNo. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Evaporator —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6 Rubber hose —Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment.
7 Oil pump M1P Used to recirculate oil.
8 Relief valve —The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level.
9Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
10 Filter — Used to prevent the entry of foreign matters in the EV valve.
13Outlet oil temperature thermistor
Th-2Used to detect the oil outlet temperature (targeted control temperature) from the evaporator.
14Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
15Inlet oil temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
16Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
17EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
18Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
19Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
21 Oil drain —Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.)
22 Flow switch S4PHUsed to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction.
23Overheat prevention temperature switch
S4B1Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.
24 Heater J1H This is an electric heater used to heat oil.
25 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 45.
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HCY400672
AKZ908-H
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1-9. Layout of Functional PartsAKZ148 to 438
No. Part Name No. Part Name No. Part Name
q Compressor i Relief valve !5 Inlet oil temperature thermistor
w Accumulator o Electronic expansion valve !7 EV valve outlet temperature thermistor
e Condenser !0 Filter !8 Condensing temperature thermistor
r Fan !1 High pressure switch !9 Discharge gas temperature thermistor
t Evaporator !2 Compressor protection thermostat @0 Pump outlet temperature thermistor
y Rubber hose !3 Outlet oil temperature thermistor @1 Oil drain
u Oil pump !4 Room temperature thermistor @2 Low-pressure gauge port
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AKZ568/908
No. Part Name No. Part Name No. Part Name
q Compressor i Relief valve !5 Inlet oil temperature thermistor
w Accumulator o Electronic expansion valve !7 EV valve outlet temperature thermistor
e Condenser !0 Filter !8 Condensing temperature thermistor
r Fan !1 High pressure switch !9 Discharge gas temperature thermistor
t Evaporator !2 Compressor protection thermostat @1 Oil drain
y Rubber hose !3 Outlet oil temperature thermistor @2 Low-pressure gauge port
u Oil pump !4 Room temperature thermistor
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2-1. AKZJ188 to 908 (-B) (-C) (-E1) (-E2), (-E3) (-H)
AKZJ Series2
No. Part Name Symbol Function
1 Compressor M2CThis compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control.
2 Accumulator —The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor.
3 Condenser —Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state.
4 Fan M3FThe feedback control of fan revolutions is performed for heat exchange through the condenser.
5 Cooling coil —Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas.
6Electronic expansion valve (EV valve)
Y1EThe EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity.
7 Strainer — Used to prevent the entry of foreign matters in the EV valve.
8High pressure switch(-C only)
S3PHIn order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction.
9Compressor protection thermostat(-C only)
S2BWhen the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction.
10Room temperature thermistor
Th-3Used to detect the synchronization source temperature while in synchronization temperature control mode.
11Liquid temperature thermistor
Th-4Used to detect the oil inlet temperature (targeted control temperature) to the evaporator.
12Machine body synchronization thermistor
Th-5Used to detect the synchronization source temperature while in synchronization temperature control mode.
13EV valve outlet temperature thermistor
Th-6While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point.
14Condensing temperature thermistor
Th-7Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction.
15Discharge gas temperature thermistor
Th-8Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.
16 Agitator motor M1KUsed to rotate the agitator propeller provided within the open coil for efficient cooling/heating of the oil in the oil tank.
17 Feed pump — This feed pump is to be locally procured.
18 Heater J1HThis is an electric heater used to heat oil and only provided in units with the suffix -H.
19 Low-pressure gauge port — Used to mount a gauge for maintenance.
*For the layout of parts, refer to information on page 48.
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HCY400668A
AKZJ188 to 908 (-B) (-C) (-E1) (-E2), (-E3) (-H)
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2-2. Layout of Functional PartsAKZJ188 to 908
No. Part Name No. Part Name No. Part Name
q Compressor u Strainer !4 Condensing temperature thermistor
w Accumulator i High pressure switch !5 Discharge gas temperature thermistor
e Condenser o Compressor protection thermostat !6 Agitator motor
r Fan !0 Room temperature thermistor !7 Heater
t Cooling coil !1 Liquid temperature thermistor !8 Low-pressure gauge port
y Electronic expansion valve !3 EV valve outlet temperature thermistor
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Name and Function of Each Part1
No. ItemDisplay
Operation/FunctionDisplay Name
qLamp display
block A
POWERPower supply
lampThis lamp will light up at all time when the power supply turns ON.
ALARMMalfunction
lampThis lamp will blink or light up when a malfunction occurs.
TIMER Timer lampThis lamp will light up while the system stops in timer mode.
wLamp display
block B
NORMAL Normal modeThis lamp will light up while normal mode is selected and blink while in auto tuning mode or special monitor mode.
SETTINGOperation
setting modeThis lamp will light up while in operation setting mode and blink while in parameter setting mode.
MONITOR Monitor modeThis lamp will light up while monitor mode is selected and blink while in service mode.
TIMERTimer setting
modeThis lamp will light up while in timer setting mode.
eMode No./Data No. display
MODE
—
Used to display the following contents while in each mode.• Normal or operation setting mode
……… The current operation mode No. is displayed.• Monitor setting mode
……… No. of data that is displayed on the data display block is displayed.
• Parameter setting mode ……… “P” is displayed while in parameter setting.
r Data displayDATA
—Used to display a variety of data.(Data displayed varies with setting mode or data No.)
tOperation
button
SELECT button
Used to switch each mode.
DOWN button Used to decrease Mode No./Data No./Data Value by 1.
UP button Used to increase Mode No./Data No./Data Value by 1.
SAVE buttonUsed to save Mode No./Data No./Data, the setting of which is being changed.
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Nine operation modes listed in Table below are available on the control panel.For normal operation, modes 1 to 4 and 8 and 9 are used.Other modes 5, 6, and 7 may interfere with the operation of the Oil Cooling Unit. Therefore, before using, be sure to thoroughly understand the functions of these modes.
Mode Function LED status
1 Normal modeUsed to display the current “operation mode” and “target temperature”. When the power supply turns ON, the system will be automatically brought to this mode.
“NORMAL” lamp ON
2 Operation setting mode Used to change the setting of “operation mode” and “target temperature” “SETTING” lamp ON
3 Monitor mode Used to display values detected by each sensor. “MONITOR” lamp ON
4 Time setting mode Used to make ON timer setting. “TIMER” lamp ON
5 Operation lock mode (factory setting)
Used to stop the operation of Oil Cooling Unit regardless of setting conditions.
All lamps except for “POWER” OFF
6 Parameter setting mode
Used to make settings shown below.qTo make setting of combination of signals output to
external contact when a malfunction or warning occurs.wTo make automatic setting of controlled variables for PI control.eTo make manual setting of controlled variables for PI control.rTo make warning setting for the protection of devices.
“SETTING” lamp blinking
7 Auto tuning mode Used to automatically compute controlled variables for PI control and set them with parameters.
“NORMAL” lamp blinking
8 Special monitor mode Used to check for a variety of current data. “NORMAL” lamp blinking
9 Service monitor mode Used to check for the history of malfunction codes and a variety of data.
“MONITOR” lamp blinking
(1) Mode shifting operationNormally, use the button to shift mode.
In order to shift to special mode, press and hold multiple buttons in combination for a period of two seconds.
CAUTIONThe system is set to “operation lock mode”
at factory. To start operation, release the operation lock mode.
If the malfunction prevention switch on the main PC board turns ON, no operation settings will be made. If so, turn OFF this switch.
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2-1. Normal ModeWhen the power supply turns ON, the system will be automatically brought to this mode.This mode is used to display the following contents according to the status of the Oil Cooling Unit.
Operation Procedure by Mode2
Status Display of control panel Remarks
Normal operation
NORMAL
SETTING
MONITOR
TIMER
POWER ALARM TIMER
MODE DATA
• POWER lamp: ON• MODE: Operation mode No. displayed• DATA: Target operating temperature displayed
MalfunctionNORMAL
SETTING
MONITOR
TIMER
POWER ALARM TIMER
MODE DATA
• POWER lamp: ON• ALARM lamp: Blinking when the malfunction level 1 occurs
ON when the malfunction level 2 occurs• MODE: OFF• DATA: Blinking malfunction code displayed
Operation locked
NORMAL
SETTING
MONITOR
TIMER
POWER ALARM TIMER
MODE DATA
• POWER lamp: ON• MODE: OFF
• DATA: Blinking ‘LOC’ displayed
To unlock, press and hold the for a period of two seconds.
While operation lock mode, the Oil Cooling Unit stops all operations including the pump operation.
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2-2. Operation Setting ModeThis mode is used to make settings of operation mode and target temperature.
Furthermore, if the malfunction prevention switch on the main PC board turns ON, no operation mode settings will be made. In this case, turn OFF this switch to make these settings.
[Setting procedure](1) Turn ON the power supply.
When the power supply turns ON, the system will be brought to “normal mode” to display the current operation mode and target control value.
(2) Shift to “operation setting mode”.
While in normal mode, press the button to shift to “operation setting mode”. (The MODE display will blink.)
(3) Select mode No.
Press the or button to select a desired mode No. (The MODE display will remain blinking.)
Press the button to save the mode No. (The MODE display will light up and the DATA display will blink.)
(4) Make setting of target temperature.
Press the or button to set to a desired target temperature. (The DATA display will remain blinking.)
Press button to save the target temperature. (The DATA display will light up.)
(5) Return to normal mode.
Press the button three times to return to normal mode.
(For reference) Mode and data will be saved when the button is pressed with the data block blinking and displayed.
If the button is pressed before saving, the mode and data in process of changing will be discarded and the system will keep running under the previous setting.
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*1. Fixed temperature control: The set value is used as a target temperature for this control.*2. Synchronization control: The target temperature is used as a value calculated by the following expression for this
control.
Target temperature = Base temperature for synchronization + Offset value
However, if the result of calculation falls short of 5.0°C, the target temperature will be adjusted to 5.0°C. If it exceeds 50.0°C, the target temperature will be adjusted to 50.0°C.
*3. Direct capacity control: Used to control the cooling capacity as set. (Setting the capacity to 0% will stop the compressor.)
Note 1) Setting operation mode to No. 4 or No. 6 without mounting the machine body synchronization thermistor (Th-5: Option) will display the malfunction code “H1” to disable the compressor operation.
2) Depending on the model of Oil Cooling Unit, some of the operation modes will not be functional.If the operation mode selected is not functional, the data block will display “— — —” to disable settings.
List of operation modes
Mode No.Setting item
Settable rangeAKZ Series AKZJ Series
0Inlet oil temperature under fixed temperature control (*1)
Liquid temperature under fixed temperature control (*1) 5.0 to 50.0°C
(Factory set to 20.0°C)1
Outlet oil temperature under fixed temperature control (*1)
(Not used)
2 (Not used) (Not used) —
3 (Factory setting)
Inlet oil temperature offset value under room temperature synchronization control (*2)
Liquid temperature offset value under room temperature synchronization control (*2)
-9.9 to 9.9°C(Factory set to 0.0°C)
4Inlet oil temperature offset value under machine body temperature synchronization control (*2)
Liquid temperature offset value under machine body temperature synchronization control (*2)
5Outlet oil temperature offset value under room temperature synchronization control (*2)
(Not used)
6Outlet oil temperature offset value under machine body temperature synchronization control (*2)
(Not used)
7 (Not used) (Not used) —
8 (Not used) (Not used) —
9Cooling capacity under direct capacity control (*3)
Cooling capacity under direct capacity control (*3)
0 to 100%(Factory set to 0%)
Set value above
• In the case of room temperature synchronization control, a value detected by the room temperature thermistor (Th-3)
• In the case of machine body synchronization control, a value detected by the machine body synchronization thermistor (Th-5: Option)
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2-5. Operation Lock ModeThis mode is used to lock the Oil Cooling Unit to the stop status and prohibit operations of buttons except for the UNLOCK button.
While in a normal use mode (i.e., normal, operation setting, or monitor mode), press and hold the or mode for a period of two seconds. “Loc” on the data display block will blink to put the system into locked status.
To release operation lock mode, also press and hold the or button for a period of two seconds.
NORMAL
TIMER
MONITOR
SETTING
ALARMPOWER TIMER
MODE DATA
In order to start or stop the Oil Cooling Unit on the control panel, start with this operation.
2-3. Monitor ModeThis mode is used to display temperatures detected by each sensor and Inlet/Outlet status.
Using the or button makes it possible to select data No.
Data No.
Contents
AKZ Series AKZJ Series
0 Machine body temperature (Th-5) *1 Machine body temperature (Th-5) *1
1 Outlet oil temperature (Th-2) *1 Not used *1
2 Room temperature (Th-3) *1 Room temperature (Th-3) *1
3 Inlet oil temperature (Th-4) *1 Inlet oil temperature (Th-4) *1
4 Pump outlet temperature (Th-10) *1 Pump outlet temperature (Th-10) *1
5Difference in temperature between oil inlet and outlet (Th-4 - Th-2) *1
Not used *1
6Value instructed by direct capacity control (%) *1
Value instructed by direct capacity control (%) *1
7 Revolutions of INV compressor (rps) Revolutions of INV compressor (rps)
8 Spare Spare
9Setting status with communication PC board (option) mounted
Setting status with communication PC board (option) mounted
*1: If the thermistor is not connected or contains a broken wire, 99.9 will be displayed for the temperature.
2-4. Timer Setting ModeThis mode is used to display ON timer setting and timer value (in hours up to a maximum of 99 hours).
Use the or button to make setting of the timer value. Saving the input with the button will put the system into timer status, thus stopping the Oil Cooling Unit operation.
To release the timer status, set the timer value to “0”.
TIMER
SETTING
ALARMPOWER TIMERNORMAL
MONITOR
MODE DATA
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2-6. Parameter Setting ModeThis mode is used to make settings of the following parameters to determine the basic operation of Oil Cooling Unit.
Setting of external output procedure when a malfunction or warning occurs...........n01 to n03Setting of conditions for auto tuning .........................................................................n04 and N05Setting of gain rate for temperature control ..............................................................n06 to n09Setting of monitoring subject for temperature warning.............................................n10, n12, n14, n16, and n18Setting of operating temperature (difference) for temperature warning....................n11, n13, n15, n17 and n19Setting of YES or NO of use of parallel communication ...........................................n20Setting of minimum pulse for EV valve.....................................................................n24
Furthermore, if the malfunction prevention switch on the main PC board turns ON, no operation settings will be made. In this case, turn OFF this switch.
(1) Setting procedureWith ‘P’ blinking in the MODE block, use the or button to select a parameter No.
The DATA block displays the parameter No. selected for a period of approximately 0.5 seconds and then data.
When the button is pressed, the DATA block will start blinking and displaying.
Use the or button to change data and the button to save the data.
Pressing the button before saving the data will discard the data to return to the previous value.
[Note] Parameters are classified into two groups: One group of parameters becomes enabled on the spot, while the other group of parameters requires turning ON the power supply again.To make judgment of which group the parameters belong to, refer to List of parameters.
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Parameter No Item Min.
valueMax. value
Default value at factory setting
Power reset required
Remarks
n00 (Not used) 0 0 0 —
n01 External output when a malfunction or warning occurs 0 11 0 Output s ignal to “60-61”,
“60-63” and “66-67”
n02 Operation setting 1 for external signal input 0 3 0 Input signal from terminal Nos. “12-13”
n03 Operation setting 2 for external signal input 0 2 0 Input signal from connector CN2
n04 Setting of auto tuning end conditions 0.0 10.0 8.0 Setting of oil outlet drop temperature
n05 Setting of response coefficient for auto tuning 0.1 10.0 AKZ : 2.0
AKZJ : 7.0 —
n06 Setting of control gain P (in the case of small temperature differential) 1 999
AKZ : 40AKZJ188 ~ 458
: 120AKZJ568·908
• n06, n08 : 90• n07, n09 : 30
Defaul t value var ies with models.
n07 Setting of control gain I (in the case of small temperature differential) 1 999
n08 Setting of control gain P (in the case of large temperature differential) 1 999
n09 Setting of control gain I (in the case of large temperature differential) 1 999
n10 Setting of monitoring subject for warning 1 0 465 0
S e t t i n g s o f “ m o n i t o r i n g sub jec t ” a n d “ o pe ra t i ng tempera tu re ” t o i ssue a temperature warning.Setting of a total of 5 items can be made.For details, refer to information in section “(4) Temperature warning” (on page 59 and later).
n11 Setting of operating temperature for warning 1 0.0 60.9 0.0
n12 Setting of monitoring subject for warning 2 0 465 0
n13 Setting of operating temperature for warning 2 0.0 60.9 0.0
n14 Setting of monitoring subject for warning 3 0 465 0
n15 Setting of operating temperature for warning 3 0.0 60.9 0.0
n16 Setting of monitoring subject for warning 4 0 465 0
n17 Setting of operating temperature for warning 4 0.0 60.9 0.0
n18 Setting of monitoring subject for warning 5 0 465 0
n19 Setting of operating temperature for warning 5 0.0 60.9 0.0
n20 Setting of YES or NO of use of parallel communication 0 1 0 Option is required to provide.
N21to
n23(Not used) — — —
Never change the setting of these parameters. Doing so will result in a malfunction.
n24 Setting of minimum pulse for EV valve 0 999 Default value varies with types of EV valve.
In order to replace the main P C b o a r d o r e l e c t r o n i c expansion valve, the minimum pulse should be set to “0” and operation to detect fully open pulse should be performed. (For details, refer to pages 112 and 113.)
N25to
N38(Not used) — — —
Never change the setting of these parameters. Doing so will result in a malfunction.
(2) List of parameters
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One placeTens place
Output to terminal block (X2M)
Setting 0 (Factory setting) 1
OutputTerminal
No.Normal
Power failure
Malfunction NormalPower failure
Malfunction
Malfunction output
60 – 61 ON OFF OFF OFF OFF ON60 – 63 OFF ON ON ON ON OFF
Setting 0 (Factory setting) 1
OutputTerminal
No.Normal
Power failure
Warning NormalPower failure
Warning
Warning output 66 – 67 ON OFF OFF OFF OFF ON
Output with communication PC board (option) used
Pin No. Setting 0 (Factory setting) 1
1 (D0) When the warning 1 occurs: OFF When the warning 1 occurs: ON2 (D1) When the warning 2 occurs: OFF When the warning 2 occurs: ON3 (D2) When the warning 3 occurs: OFF When the warning 3 occurs: ON4 (D3) When the warning 4 occurs: OFF When the warning 4 occurs: ON5 (D4) When the warning 5 occurs: OFF When the warning 5 occurs: ON6 (D5) (Not used)7 (D6) When the malfunction level 1 occurs: OFF / When the malfunction level 2 occurs: ON8 (D7) When the malfunction occurs: OFF When the malfunction occurs: ON
9 (COM) Common (+24V)
(3) Parameter No. n01: External output when a malfunction or warning occursWhen a malfunction or warning occurs, used to make setting of combination of output to each contact.
n02: OP contact levelUsed to make setting of operation for input signal (OP signal) to the connection terminals (12 and 13: OP terminals) of optional safety equipment on the terminal block (X2M).
“0”: OP terminal not used (factory setting)“1”: Used to implement the malfunction level 1 when the connection terminals (12 and 13) turn OFF.“2”: Used to implement the malfunction level 2 when the connection terminals (12 and 13) turn OFF.“3”: Used to implement the malfunction level 1 (respond to the flow switch) when the connection terminals
(12 and 13) do not turn ON after a lapse of 30 seconds since the pump starts operation.[Note] Just connecting the optional safety device to the OP terminals will not enable the protective function. Be
sure to make this parameter setting.
n03: OP2 contact levelUsed to setting of operation for input signal to the CN2 (OP2) on the main PC board (A1P).
“0”: CN2 terminal not used (factory setting)“1”: Used to implement the malfunction level 1 when the CN2 contact turns OFF.“2”: Used to implement the malfunction level 2 when the CN2 contact turns OFF.
[Note] The OP2 may be used for an option at factory setting.
n04: Setting of auto tuning end conditionsWhile in auto tuning mode, if the oil outlet temperature falls by the degree set with this parameter, the auto tuning will end. (For details, refer to information in Section 2-7.)
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n05: Setting of response coefficient for auto tuningUsed to make setting of response coefficient to calculate the optimum control variable for auto tuning (Section 2-7).qMake this value smaller. . Stability will be upgraded, but responsiveness will be degraded.wMake this value larger. . Responsiveness will be upgraded, but stability will be degraded.
n06 to n09: Setting of gain rate for temperature control• n06: Control gain P (in the case of small temperature differential)• n07: Control gain I (in the case of small temperature differential)• n08: Control gain P (in the case of large temperature differential)• n09: Control gain I (in the case of large temperature differential)Parameters n06 to n09 are used to make setting of gain for temperature control.In the case of small temperature differential between the control target and the control subject, use gains of n06 and n07.In the case of large temperature differential between the control target and the control subject, use gains of n08 and n09.
n10, n12, n14, n16, and n18: Setting of monitoring subject for temperature warningUsed to make setting of monitoring subject for temperature warning and also operation contents when conditions are met.
n11, n13, n15, n17, and n19: Setting of operating temperature (differential) for temperature warningUsed to make setting of operating temperature (differential) to issue a temperature warning.
n20: Setting of YES or NO of use of parallel communicationUsed to make setting of whether or not to perform parallel data communication with the main machine.
“0”: Not performed (Factory setting)“1”: Performed
Setting this parameter to “0” with a communication extension PC board (option) connected will make it possible to use parallel output from the extension PC board as individual output of alarm status or temperature warning.
n21 to n23: Not usedNever change the setting of these parameters. Doing so will result in a malfunction.
n24: Setting of minimum pulse for EV valveUsed to make optimum setting of minimum pulse for the EV valve by equipment.(Factory setting to the optimum pulse for EV valve concerned.)
n25 to n28: Not usedNever change the setting of these parameters. Doing so will result in a malfunction.
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(4) Temperature warningThis function alerts you to the necessity to check for Oil Cooling Unit when the monitoring temperature exceeds the set temperature range. When the temperature warning is detected, operations of compressor, fan, and others will vary with settings (of operations after temperature warning is detected (C) as per table shown below).
(4)-1. Detailed settingsqBased on the following expression, make settings of “monitoring subject (a)”/“monitoring subject (b)” and
“temperature to issue a warning (d)”.
Temperature for monitoring subject (a) – Temperature for monitoring subject (b) = Temperature to issue a warning (d)
wMake settings of “YES/NO of external output of warning signal (c)” and “Resetting procedure after warning (c)”.eMake setting of the following “differential value (e) to specify the resetting temperature.
Resetting temperature = Temperature to issue a warning (d) ±(*) Differential value (e)
*If the temperature to issue a warning is set to the lower limit, take “+”. If it is set to the upper limit, take “–”.
(4)-2. Setting procedureTurning ON power supply:qTurn ON the power supply. (The system will be automatically put into “normal mode”.)Parameter setting mode:
wPressing and holding the button for a period of two seconds or more will put the system into “parameter setting mode”. (The MODE block will display blinking “P”.)
Settings of (a), (b), and (c):
eUse the or button to set to a desired parameter No. (n10, n12, n14, n16, or n18).
(After a lapse of 0.5 seconds, the DATA block will display data.)
rUse the or button to set (a), (b), and (c) to desired Nos.,
respectively.
tUse the button to save the Nos.
Operation after a temperature warning is detected (c)
Setting
No.Display ON/OFF
External output (*2)
Terminals 60-61/60-63 Terminals 66-67
0 (Warning function is not used.)
1
Warning (1E to 5E)
ON (*1)
No output
Warning output
2Compressor
only forcedly
stops.
Automatic
reset
No output
3 Warning output
4Malfunction code “FH” Manual reset Malfunction output
No output
5 Warning output
*1: “ON” follows thermostat ON/OFF control.*2: Output to external terminals follows the setting of parameter n01 (refer to page 57).
Monitoring subject (b)
Setting
No.
Display item
AKZ Series AKZJ Series
0 (Warning function is not used.)
1 -Machine body temperature (Th-5) -Machine body temperature (Th-5)
2 -Outlet oil temperature (Th2) (Not used)
3 -Room temperature (Th-3) -Room temperature (Th-3)
4 -Inlet oil temperature (Th-4) -Liquid temperature (Th-4)
5 ≥Fixed value ≥Fixed value
6 ≤Fixed value ≤Fixed value
Monitoring subject (a)
Setting
No.
Display item
AKZ Series AKZJ Series
0 (Warning function is not used.)
1 Machine body temperature (Th-5) Machine body temperature (Th-5)
2 Outlet oil temperature (Th2) (Not used)
3 Room temperature (Th-3) Room temperature (Th-3)
4 Inlet oil temperature (Th-4) Liquid temperature (Th-4)
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5 Control Panel
Settings of (d), and (e):
yUse the or button to set to a desired parameter No. (n11, n13, n15, n17, or n19).
(After a lapse of 0.5 seconds, the DATA block will display data.)
uUse the or button to set (d), and (e) to figures desired, respectively.
iUse the button to save the figures.
Returning to normal:
oPress the button to return to “normal mode”.
(Reference) List of typical temperature warning settingsAKZ Series
No. Item to monitor temperature
Setting of monitoring subject(n10,n12,n14,n16,n18)
Setting of operating temperature(n11,n13,n15,n17,n19)
(a) (b) (c) (d) (e)
Monitoring subject (1)
Monitoring subject (2)
Operation after warning
Temperature to issue a warning
Differential value.
1 When temperature warning is not used (factory setting) 0 0 0 0 0
2 When the oil outlet temperature is higher than the machine body temperature 2 1 1,4,5
Make setting of temperature
differential range of 0 to 60.
—
3 When the oil outlet temperature is higher than the room temperature 2 3 1,4,5 —
4 When the oil outlet temperature is lower than the machine body temperature 1 2 1,2,3 Make setting of range of 1 to 9.5 When the oil outlet temperature is lower than the room temperature 3 2 1,2,3
6 When the oil inlet temperature is higher than the machine body temperature 4 1 1,4,5 —
7 When the oil inlet temperature is higher than the room temperature 4 3 1,4,5 —
8 When the oil inlet temperature is lower than the machine body temperature 1 4 1,2,3 Make setting of range of 1 to 9.9 When the oil inlet temperature is lower than the room temperature 3 4 1,2,3
10 When the oil outlet temperature is high 2 5 1,4,5 Make setting of temperature
differential range of 0 to 60.
—
11 When oil inlet temperature is high 4 5 1,4,5 —
12 When the oil outlet temperature is low 2 6 1,2,3 Make setting of range of 1 to 9.13 When the oil inlet temperature is low 4 6 1,2,3
AKZJ Series
No. Item to monitor temperature
Setting of monitoring subject(n10,n12,n14,n16,n18)
Setting of operating temperature(n11,n13,n15,n17,n19)
(a) (b) (c) (d) (e)
Monitoring subject (1)
Monitoring subject (2)
Operation after warning
Temperature to issue a warning
Differential value.
1 When temperature warning is not used (factory setting) 0 0 0 0 0
2 When the liquid temperature is higher than the machine body temperature 4 1 1,4,5 Make setting of temperature
differential range of 0 to 60.
—
3 When the liquid temperature is higher than the room temperature 4 3 1,4,5 —
4 When the liquid temperature is lower than the machine body temperature 1 4 1,2,3 Make setting of range of 1 to 9.5 When the liquid temperature is lower than the room temperature 3 4 1,2,3
6 When the liquid temperature is high 4 5 1,4,5 Make setting of temperature
differential range of 0 to 60.
—
7 When the liquid temperature is low 4 6 1,2,3Make setting of range of 1 to 9.
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(4)-3. Display while in temperature warning
(4)-4. Action against temperature warningIf the temperature warning is executed according to low oil temperature protection, this warning will be automatically reset when the temperature reaches the warning reset temperature. In contrast, if the temperature warning is executed according to high oil temperature protection, the power supply should be turned ON again (manually reset). In each case, probe the causes of fluctuations in oil temperature both on the main machine and the Oil Cooling Unit sides.
Particularly, on the Oil Cooling Unit side, check for the following points.• Whether or not oil quantity is kept at the normal level.• Whether or not there is any obstacle in the vicinity of air supply/exhaust opening.• Whether or not the filter is clogged.• Whether or not the condenser gets dirty.• Whether or not an improper model is selected.• Whether or not capacity is stepping down (the room temperature and oil temperature are below 35°C).• Whether or not the system runs according to direct capacity control.• Whether or not refrigerant gas has leaked out.• Whether or not sensors get dirty or damaged.• Whether or not the setting of temperature warning is properly made.
NORMAL
MONITOR
TIMER
SETTING
MODE DATA
POWER ALARM TIMER
Warning display
Content
1EOperation according to setting with parameter Nos. “n10” and “n11”
2EOperation according to setting with parameter Nos. “n12” and “n13”
3EOperation according to setting with parameter Nos. “n14” and “n15”
4EOperation according to setting with parameter Nos. “n16” and “n17”
5EOperation according to setting with parameter Nos. “n18” and “n19”
“ALARM” lamp: OFFDisplay of “DATA” block: Warning set number is blinked and displayed.
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2-7. Auto Tuning ModeThis mode is used to automatically compute controlled variables for PI control and set them with parameter n6 to n9.
(1) Setting procedure
Turning ON power supply:qTurn ON the power supply. (The system will be automatically put into “normal mode”.)
Auto tuning mode:wPressing and holding the buttons simultaneously for a period of two seconds or more will put the
system into “auto tuning mode”.
ePressing the button will initiate the auto tuning.
(The system will automatically go through the following steps.)
Step 0
Used to check for auto tuning conditions.
Step 1
Used to operate for the stabilization of initial conditions.
Step 2
Used to operate for g a t h e r i n g d a t a o n control subject.
Step 3
Used to compute and set the result with a parameter.
End of auto tuning
rPressing the button will return the system to “normal mode”.
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Note) 1. Before putting the system into auto tuning mode, be sure to make setting of operation mode (except for No. 9 while in operation setting mode) in order to determine the thermistor subject to control.
2. Initiate auto tuning from the state in which the room temperature is approximately equal to the oil temperature (i.e., stable state). Furthermore, perform the auto tuning with no load (in a stop state) on the main machine side.
3. If an “error” occurs while in auto tuning, the auto tuning will be disabled. In this case, press the button to return the system to “normal mode”.
Probe the causes of the error to take measures against the error and then perform the auto tuning again.4. In Step 2, the system runs at 100% capacity. Consequently, oil may be overcooled. Make adjustment of
overcooled oil with parameter No. 4 (Setting of auto tuning end conditions). (Set the conditions to as large value as possible to the extent that no damage is caused to the machine.)
5. In order to compute the optimum control variable based on data gathered, the setting of response coefficient should be made with the parameter No. 5.(Making the variable smaller provides a higher level of stability, while making it larger provides a higher level of responsiveness.)
6. Depending on the conditions of control subject (machine), the optimum control gain may not be computed at one time. In this case, perform multiple calculations to take an average value or use a mode value (except for an extreme value).
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6 Functions
Operation Flow Chart1
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FunctionsF
un
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Function Description
1 Stop
Stop due to malfunction
When a malfunction occurs while in running, used to stop compressor or else for protection.Stop due to malfunction is classified into the following two levels.
• Malfunction level 1: Compressor, pump, and fan all stop operation.• Malfunction level 2: Only the compressor stops running. (The pump and fan
keep operating.)
Stop due to temperature warning
When the monitoring temperature exceeds the set temperature while in operation, used to stop the compressor or else.
• Operation to stop: Only the compressor stops operation. (The pump and fan keep operating.)
• Resetting procedure (Two procedures are available according to setting.)
A Automatic resetting - After a lapse of “standby for restart”, the system will automatically restart operation.
B Manual resetting - After resetting the power supply on manual control, turning ON the circuit breaker again will restart operation.
*For details of temperature warning setting procedure, refer to information on page 59 and later.
2 Standby Standby for restartIn order to prevent frequent ON/OFF operations of the compressor and equalize pressure within the refrigerant system, used to stand by for the restart of the compressor for a period of 30 seconds after the compressor stops.
3Startup control
Startup control
For models AKZ(J)148 to 568, in order to start the compressor, used to increase the operating frequency to 46 Hz once and then operate the compressor at the minimum operating frequency.
AKZ(J)148 ~ 568
46Hz
38Hz
AKZ(J)908
25Hz2Hz/s
2Hz/s
Judgment of thermostat ON/OFF
Make ON/OFF judgment of the thermostat under the following conditions against the set temperature.Thermostat ON condition: Detected temperature ≥ Set (target) temperatureThermostat OFF condition: Detected temperature < Set (target) temperature
4Function control
(High-accuracy) oil temperature
control
Compressor control
In medium/high load regions (i.e., 60 to 100% of the product capacity), used to control the compressor operating frequency, thus making the oil temperature corresponding to the target temperature.
EV valve control
In low load regions (i.e., 5 to 60% of the product capacity), used to control the EV valve opening, thus making the oil temperature corresponding to the target temperature.
Auto tuning controlUsed to compute P/I gain for temperature control and then set it to parameter concerned.
5Protection
control
High pressure protection function
When high pressure shows an abnormal rise, used to stop only the compressor due to malfunction.
Stop due to detection by the thermistor of condenser (subject to all applicable models)Actuating temperature: 65°C or moreStop due to detection by the high pressure switch (only on -C models)Actuating pressure: 4.1MPa
Inverter protection function
When an abnormal inverter fin temperature is detected, used to stop only the compressor due to malfunction.
Actuating temperature: 95°C (AKZ(J)148 to 568)120°C (AKZ(J)908)
Functions2
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6 Functions
When a malfunction or warning occurs while in operation, the equipment will stop operation in progress and the status will be displayed.1. In order to protect functional parts, the compressor, oil pump, fan, or else stops.2. In order to alert the customer to the malfunction or warning, it is displayed by code or lamp.
No.Malfunction
level
ON/OFF Display
SubjectCompressor Oil pump Fan
Resetting
procedureDisplay
Malfunction
lamp
1 Level 1 OFF OFF OFFManual
resettingDisplay by
malfunction
code
Blink Malfunction code
(A6 to UJ)
For details, refer to page 70.2 Level 2 OFF ON ONManual
resettingON
3
Level 3
OFF ON ONAutomatic
resetting Display by
warning
OFF Warning
(1E to 5E)
For details, refer to page 61.4 ON ON ON — OFF
5 — OFF ON ONAutomatic
resettingNo display OFF
q Low room temperature
protection (*1)
w Low oil temperature
protection (*2)
*1: When the room temperature thermistor detects a temperature of -2°C or less, this protection will be activated.*2: When the inlet oil temperature thermistor detects a temperature of 2°C or less, this protection will be activated.
List of Malfunctions/Warnings3
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7 TroubleshootingTroubleshooting
Item Symptom Cause Measure
1
The uni t per forms no operation. (The POWER lamp on the operation panel does not turn ON.)
qMain power not supplied or power supply wires (L1 and L2) disconnected.
Supply power to the power supply terminals (R, S, and T) on the main PC board (A1P).
2 The pump does not operate.
qRemote control terminals (10 – 11) on the external terminal block (X2M) in the OFF position.
Check to be sure the connection of remote control input.
w“Operation lock mode” selected (Factory set to “operation lock mode”)
Unlock “operation lock mode” on the control panel. (Refer to page 54.)
3
The pump operates but no oil flows.A small quantity of oil recirculates and the pump makes a loud noise.
qUnfastened piping on the suction side of the pump.
Check the packing in the piping for condition and then refasten it if necessary.
wClogged suction strainer (on the main machine side)
• Clean the suction strainer.• If the oil in the oil tank gets foul, replace the oil.
eDropped oil level in the oil tank Refill the oil tank with oil.
rRel ief valve act ivated due to large pressure loss in the oil discharge piping Make the oil pipe diameter larger and the piping
shorter.tCavitation caused in the pump due to large pressure loss in the oil suction piping
4The pump operates but the compressor does not operate.
qCompressor stop due to temperature control – – –
wActivation of compressor restart protection timer (30-second timer)
Check to be sure the compressor starts up when the timer completes its operative period of time.
eActivation of low oil temperature protection (due to inlet oil temperature of 2°C or less)
Use at an inlet oil temperature of 5°C or more.
rActivation of low room temperature protection (due to room temperature of -2°C or less)
Use at a room temperature of 5°C or more.
tMode No. 9 set to 0% Change to proper operation mode.
5Both the pump and compressor operate but oil does not become cool.
qObstacle present near the air suction/exhaust opening
Remove the obstacle.
wDirty air filter Clean the air filter.
eStepping down operation in progress due to high room temperature
Check to sure the capaci ty in the operat ing temperature range with the catalog and then select a model having a proper capacity.rToo large heat load
tToo high set temperature Change the setting to a proper temperature.
yShortage of refrigerant gas if exhaust temperature is approximately equal to the room temperature, even though the compressor is in operation.
Recharge refrigerant.
6No operation settings can be made.
qIf “– – –” is displayed in the DATA block, the thermistor used for operation mode concerned is not connected.
Correct the connection of the thermistor.
wIf “– – –” is displayed for just a moment when the button (i.e., r ightmost switch) is pressed, mishandling prevention switch (SW1) is set to ON.
Set the mishandling prevention switch (SW1) on the main PC board to OFF.
7
Malfunction signals are output f rom terminals 64–65 on the external t e r m i n a l b l o c k i n a manner different from the conventional one.
qThe procedure for signal output when a malfunction occurs is different from that of Models 5 and 6.
The procedure is different from that for models AKS5 and AKZ6.Referring to information in “Parameter setting mode” on page 55, make proper settings.
If an operation shows an abnormality even through no malfunction code is displayed, refer to the following information to take measures.
Troubleshooting According to Symptoms1
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7 Troubleshooting
Using the control panel to put the system into “special monitor mode” will acquire a variety of data on the current equipment.
[Operation procedure]
While in normal mode (with the NORMAL lamp ON), press and hold the and buttons for a period of two seconds, the NORMAL lamp will start blinking to shift to special monitor mode.
Pressing the or button will make it possible to change data No. (display in the MODE block).
Furthermore, pressing the button while in special monitor mode will return the system to normal mode.
Display item of special monitor mode
Data No. Item0 [Current] Command frequency controlled by compressor inverter (rps)1 [Current] EV valve opening (pulse)2 [Current] Main circuit voltage (V)3 [Current] Primary current of main circuit (A)4 [Current] Inverter radiation fin temperature (°C)5 [Current] Control box temperature (°C)6 [Current] Discharge gas temperature (°C)7 [Current] Condenser saturated temperature (°C)8 [Current] EV valve outlet temperature (°C)9 [Current] DC fan revolutions (10 rpm)A Power supply frequency detected (Hz)B — (used for technical test) *C — (used for technical test) *D — (used for technical test) *E Control software Ver.F Inverter software Ver.
*: Since the data is used for technical test, do not change the setting on site.
<Special monitor mode>
<Normal mode>
Equipment Data checking Procedure2
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TroubleshootingTroubleshooting
Using the control panel to put the system into “service monitor mode” will make it possible to check the history of malfunction codes and data when a malfunction occurs.
<Service monitor mode>
3-1. Control Panel Operation Procedure<Normal mode>
While in normal mode (with the NORMAL lamp ON), press and hold the button for a period of two seconds, the MONITOR lamp will start blinking to shift to service monitor mode.
Pressing the or button will make it possible to change data No. (display in the MODE block).
Furthermore, pressing the button while in service monitor mode will return the system to normal mode.
Display item of special monitor modeData No. Item
0 Malfunction code 0 (latest)1 Malfunction code 12 Malfunction code 23 Malfunction code 34 Malfunction code 45 Malfunction code 56 Malfunction code 67 Malfunction code 78 Malfunction code 89 Malfunction code 9 (oldest)A [When a malfunction occurs] Machine body temperature [Th-5] (°C)B [When a malfunction occurs] Outlet oil temperature [Th-2] (°C)------ Not displayed on AKZJC [When a malfunction occurs] Room temperature [Th-3] (°C)
D [When a malfunction occurs] Inlet oil temperature [Th-4] (°C) --------Liquid temperature in the oil tank [Th-4] displayed on AKZJ (°C)
E [When a malfunction occurs] Discharge gas temperature [Th-8] (°C)F [When a malfunction occurs] Condenser saturated temperature [Th-7] (°C)H [When a malfunction occurs] EV valve outlet temperature [Th-6] (°C)J [When a malfunction occurs] Inverter frequency command (rps)L [When a malfunction occurs] EV valve opening (pulse)P [When a malfunction occurs] Main circuit voltage (V)U [When a malfunction occurs] Main circuit current (A)Y [When a malfunction occurs] Cumulative compressor operating time (minute)— Malfunction reset (Note 1)
(Note 1) Normally, ‘0’ is displayed. Setting this value to ‘77’ makes it possible to reset the control CPU. (Basically, it is recommended to clear the alarm through turning the power supply to the Oil Cooling Unit OFF and then ON. Use this function only if the power supply to the Oil Cooling Unit cannot be turned OFF individually.
Troubleshooting According to Malfunction Codes3
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7 Troubleshooting
3-2. List of Malfunction CodesMalfunction
codeMalfunction
levelMalfunction Malfunction decision condition
Troubleshooting Flow Chart
(Reference page)
A6 2 DC fan stop Actual fan revolution falls below 10 rpm while in fan revolution. 71
AA 2 Malfunction due to overheated heaterFor AKZ Series, the overheat prevention temperature switch reaches a temperature of 70°C.For AKZJ Series, the boil-dry prevention thermostat reaches a temperature of 105°C.
72
E1 1 System malfunctionCompressor ID No. (PC board jumper setting) ≠ Parameter horsepower setting
73
E3 2Malfunction due to high pressure or condenser temperature
The condenser temperature of 65°C or more continues for a period of 10 seconds. 74High pressure exceeds 4.2 MPa (only for -C models).
E5 2Malfunction due to discharge gas temperature or overheated compressor
The discharge gas temperature exceeds A for a period of 10 seconds (*1).75
The compressor head temperature exceeds 115°C.
E6 2 Compressor lock at startup The compressor revolutions are not detected at startup. 76
E9 2 Malfunction of electronic expansion valveThe malfunction is detected according to the EV valve opening and EV valve outlet temperature.
77
EH 1Actuation of pump overcurrent relay or actuation of agitator inner thermostat
The pump current exceeds B (*2). 78
EJ 1Actuation of boil-dry prevention switch of actuation of optional safety devices
The pressure reaches 0.03 MPa (for -H units up to AKZ438/AKZJ458).79The flow rate reaches 15 L/minute (for -H units up to AKZ568/AKZJ568).
The safety device connected to X2M 12-13 activates. (Short-circuit)
FE 1Malfunction due to oil pressure (rise in pump outlet temperature)
The pump outlet temperature exceeds 65°C. 80
FH 2Rise in oil inlet temperature or rise in tank liquid temperature
The oil inlet temperature exceeds 60°C for a period of consecutive 60 seconds.
81
H1 2Malfunction of room temperature thermistor or malfunction of machine body synchronization thermistor
The thermistor makes a short circuit or contains a broken wire. 82
J3 2 Malfunction of discharge gas temperature thermistor The thermistor makes a short circuit or contains a broken wire. 82
J5 2 Malfunction of EV valve outlet temperature thermistor The thermistor makes a short circuit or contains a broken wire. 82
J6 2 Malfunction of condenser temperature thermistor The thermistor makes a short circuit or contains a broken wire. 82
JE 2 Malfunction of pump outlet temperature thermistor The thermistor makes a short circuit or contains a broken wire. 82
JH 2Malfunction of outlet oil temperature thermistor or malfunction of inlet oil temperature thermistor
The thermistor makes a short circuit or contains a broken wire. 82
L0 2 Malfunction of inverter/compressor Any of the malfunction codes L4, L5, L8, L9, and LA is displayed. 83
L4 2 Rise in radiation fin temperature The temperature rises to 95°C (up to 568 class) or 120°C (on 908 class). 84
L5 2 Instantaneous overcurrent of power transistor The output overcurrent is input in the microcomputer. 85
L8 2 Compressor overload The compressor output revolutions reach an abnormal level. 86
L9 2 Faulty compressor startup The compressor does not smoothly rotate at startup. 87
LA 2 Malfunction of power transistor The microcomputer detects the malfunction of power transistor. 88
LC 2Malfunct ion of transmission between inverter CPU and temperature control CPU
The transmission between the inverter microcomputer and the temperature control microcomputer malfunctions.
89
P3 2 Malfunction of control box thermistor The thermistor makes a short circuit or contains a broken wire. 82
P4 2 Malfunction of fin temperature thermistor The thermistor makes a short circuit or contains a broken wire. 82
U0 2 Shortage of refrigerantqCommand capacity ≥ 95%wCondenser temperature - EV valve outlet temperature ≤ 5°C qand w continues for a period of three minutes.
90
U1 1Reverse phase/open phase of power supply or wire broken in fuse
Reverse phase or open phase is detected in the power supply circuit.
91
U2 2 Malfunction due to power supply voltage The power supply voltage drops below 170 V. 92
U9 2 Malfunction of transmission with slave unitWhile in pair operation of master and slave units, data transmission with other system malfunctions.
93
UH 2 System-related failure EEPROM causes a failure. 94
UJ 2 Actuation of external safety device A short circuit occurs between the terminals of CN2 on the main PC board. 95
Malfunction level 1 ... Pump OFF + Compressor OFF + Fan OFFMalfunction level 2 ... Pump ON + Compressor OFF + Fan ON
*1: 117°C: AKZ148/328 and AKZJ188/358 120°C: All models other than those shown left.*2: 2.5 A: AKZ148 to 438 3.6 A: AKZ568/908
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TroubleshootingTroubleshooting
5 Troubleshooting
Diagnosis Countermeasures
Control panel display
A6 DC Fan Stop
1 Applicable Models
AKZ148AKZ328AKZ438AKZJ188AKZJ358AKZJ458
2 Methods of Malfunction Detection
Use revolutions detected with a hall IC built in the fan motor.
3 Malfunction Decision Conditions
When the fan revolution falls below 10 rpm.
4 Supposed Causes
Faulty connector connection Faulty main PC board Faulty fan motor Surge in power supply Noise from power supply
circuit
3-3. Troubleshooting Flow Chart
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
Control panel display
AA Malfunction due to Overheated Heater
1 Applicable Models
AKZ**8-HAKZJ**8-H(Al l models equipped with heater)
2 Methods of Malfunction Detection
AKZ**8-H:Detect by superheat prevention temperature switch (S4B1)
AKZJ**8-HDetected by boil-dry prevention thermostat (S4B1 or S4B2)
3 Malfunction Decision Conditions
AKZ**8-H:When the overheat prevention temperature switch is actuated.
Actuating temperature: 70°C AKZJ**8-H:
When the boil-dry prevention temperature switch is actuated.
Actuating temperature: 105°C(Resetting temperature: 99°C)
4 Supposed Causes
Inadequate oil quantity refilled Inadequate oil flow rate Faulty wiring of pump Faulty magnetic contactor Stains adhering around heater
(only on AKZJ**8-H)
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8AKZJ**8
2 Methods of Malfunction Detection
Check with microcomputer whether or not E2PROM is normal.
3 Malfunction Decision Conditions
When the combination of PC board and compressor is not normal.
4 Supposed Causes
Improper spare PC board used for servicing
Control panel display
EI Malfunction of System
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
1. Malfunction due to condenser temperatureAKZ**8(All series including -C models)AKZJ**8(All series including -C models)
2. Malfunction due to high pressureAKZ**8-CAKZJ**8-C
2 Methods of Malfunction Detection
1. Detect with the condenser temperature thermistor to be located in the middle of the condenser.
2. Detect the presence/absence of continuity with the high pressure switch to be located in the discharge pipe.
3 Malfunction Decision Conditions
1. When the condenser temperature thermistor detects a temperature in excess of 65°C.
2. When the high pressure switch is actuated.
Actuating pressure: 4.1 MPa(Resetting pressure: 3.2 MPa)
4 Supposed Causes
Shield present around the equipment
Dirty air filter Room temperature too high Oil inlet temperature too high Faulty condenser temperature
thermistor Faulty high pressure switch Dirty or clogged condenser Faulty fan Short circuit of fan air
quantity
Control panel display
E3 Malfunction due to High Pressure or Condenser Temperature
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
1. Malfunction due to discharge gas temperatureAKZ**8(All series including -C models)AKZJ**8(All series including -C models)
2. Malfunction due to overheated compressorAKZ**8-CAKZJ**8-C
2 Methods of Malfunction Detection
1. Detect with the discharge gas temperature thermistor.
2. Detect the compressor protection thermostat.
3 Malfunction Decision Conditions
1. When the discharge gas temperature thermistor detects a temperature of the following.
AKZ(J)148 to 358: 117°C AKZ(J)438 to 908: 120°C
2. When the compressor protection thermostat is actuated.Actuating temperature: 115°CResetting temperature: 85°C
4 Supposed Causes
Shield present around the equipment
Dirty air filter Room temperature too high Oil inlet temperature too high Fa u l t y d i s c h a r g e g a s
temperature thermistor Faulty compressor protection
thermostat Inadequate refrigerant quantity
(including slow leakage) Heat generated due to worn
compressor shaft Faulty EV valve Dirty or clogged condenser Short circuit
Control panel display
E5Malfunction due to Discharge Gas Temperature or Overheated Compressor
Ω
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect according to compressor revolutions at startup.
3 Malfunction Decision Conditions
When the compressor revolutions are not detected.
4 Supposed Causes
Compressor locked
Control panel display
E6 Compressor Lock at Startup
Replace the compressor.
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect the malfunction according to the EV valve opening and outlet temperature.
3 Malfunction Decision Conditions
When the EV valve outlet temperature does not rise to an adequate level even through the EV valve opening is increased.
When the EV valve outlet temperature does not fall to an adequate level even though the EV valve opening is decreased.
4 Supposed Causes
Faulty EV valve coil Faulty main PC board Faulty mounting of EV valve
coil Inadequate oil level
Control panel display
E9 Malfunction of Electronic Expansion Valve
Ω
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
qFor AKZ**8:Detect with the pump motor overcurrent relay (F1M).
wFor AKZJ**8:Detect with the agitator inner thermostat (S1B).
3 Malfunction Decision Conditions
qWhen the pump motor overcurrent relay is actuated.Actuating current for AKZ148 to 438: 2.5 AActuating current for AKZ568 and 908: 3.6 A
wWhen the agitator inner thermostat contact is opened.Actuating temperature: 135°C
4 Supposed Causes
qFor AKZ series: Erroneous pump wiring Defective oil piping by
customer Faulty oil pump Incompatible viscosity of oil
used
wFor AKZJ series Erroneous agitator wirings Faulty agitator motor
Control panel display
EHActuation of Pump Overcurrent Relay or Agitator Inner Thermostat
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
qAKZ148- to 438-HwAKZ568- and 908-HeModels other than AKZ**8-H
and with opt ional safety equipment mounted
2 Methods of Malfunction Detection
qAKZ148- to 438-H:Detect with the boil-dry prevention pressure switch (S5P).
wAKZ568- and 908-HDetect with the boil-dry prevention flow switch (S4PH).
eModels other than AKZ**8-H:Detect with the optional safety devices.
3 Malfunction Decision Conditions
qAKZ148- to -438H:Actuating (open) pressure:
0.03 MPawAKZ568- and 908-H:
Actuating (open) flow rate: 15 L/minute
eModels other than AKZ**8-H:Actuating (open) pressure of the optional safety devices.
4 Supposed Causes
Faulty main PC board High path resistance of oil
piping Faulty boil-dry prevention
pressure switch Faulty boil-dry prevention
flow switch High viscosity of oil used
Control panel display
EJActuation of Boil-dry Prevention Switch or Optional Safety devices
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ148 to 568
2 Methods of Malfunction Detection
Detect the malfunction with the pump outlet temperature thermistor (Th-10).
3 Malfunction Decision Conditions
When the pump outlet temperature exceeds 65°C.
4 Supposed Causes
Closed oil piping system Large pressure loss in oil
piping system Faulty main PC board
Control panel display
FEMalfunction due to oil Pressure (Rise in Pump Outlet Temperature)
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
qAKZ**8:Detect with the inlet oil temperature thermistor (Th-4).
wAKZJ**8Detect with the liquid temperature thermistor (Th-4).
3 Malfunction Decision Conditions
When the inlet oil temperature or the liquid temperature in the tank exceeds 60°C.
4 Supposed Causes
Faulty inlet oil temperature thermistor
Improper model selection Dirty air filter Improper operation mode Defective oil piping Faulty main PC board
Control panel display
FH Rise in Oil Inlet Temperature or Tank Liquid Temperature
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82
7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect malfunction according to resistance detected with thermistor.
3 Malfunction Decision Conditions
When the thermistor contains a broken wire or short-circuited.
4 Supposed Causes
Faulty thermistor Faulty main PC board Faulty thermistor connection
Control panel displayHI,J3,J5,J6,JE,JH,P3,P4
Malfunction of Thermistors
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
3 Malfunction Decision Conditions
4 Supposed Causes
Control panel display
LO Malfunction of Inverter/Compressor
Any of the following malfunctions has occurred.
: Rise in radiation fin temperature : Instantaneous overcurrent of power
transistor : Compressor overloaded : Faulty compressor startup : Malfunction of power transistor
While in service monitor mode (refer to page 69), check to be sure the malfunction code and then take measures according to the applicable “Troubleshooting flow chart”.
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect with the fin temperature thermistor mounted on the radiation fin.
3 Malfunction Decision Conditions
When the temperature detected with the fin temperature thermistor exceeds any of the following values. AKZ(J)148 to 568: 95°C AKZ(J)980: 120°
(Retry: 10 times)
4 Supposed Causes
Faulty main PC board Blocked ventilation opening Dirty radiation fin Ambient temperature too
high
Control panel display
L4 Rise in Radiation Fin Temperature
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ568 and 908AKZJ568 and 908
2 Methods of Malfunction Detection
Detect according to current passing through the power transistor.
3 Malfunction Decision Conditions
When the output overcurrent is input from the output overcurrent detection circuit to the microcomputer.
(Retry: 10 times)
4 Supposed Causes
Faulty compressor coil Overcurrent due to the stall
of compressor Faulty power transistor Noise to power supply line
Control panel display
L5 Instantaneous Overcurrent of Power Transistor
Ω
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect according to the output revolutions of the compressor.
3 Malfunction Decision Conditions
qWhen the revolutions are not output
wWhen the revolutions reach 1/2 of the target revolutions
eWhen the revolutions detected are too fast
(Retry: 10 times)
4 Supposed Causes
Compressor overloaded Compressor mechanically
locked Faulty main PC board Faulty power supply voltage
(e.g. instantaneous power failure or slow-down of voltage
Noises present in the power supply line
Lightning surge
Control panel display
L8 Compressor Overloaded
Ω
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect according to the compressor revolutions at startup.
3 Malfunction Decision Conditions
When the compressor does not rotate smoothly.
(Retry: 10 times)
4 Supposed Causes
Faulty pressure equalization Faulty compressor wire
connections Faulty compressor
(incomplete lock) Faulty main PC board Faulty EV valve
Control panel display
L9 Faulty Compressor Startup
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect according to current passing through the power transistor.
3 Malfunction Decision Conditions
When the output overcurrent is input from the output overcurrent detection circuit to the microcomputer.
(Retry: 10 times)
4 Supposed Causes
Faulty compressor coil Overcurrent due to the stall
of compressor Faulty power transistor Noise to power supply line
Control panel display
LA Instantaneous Overcurrent of Power Transistor
Ω
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89
5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Check communication conditions between the inverter microcomputer and the temperature control microcomputer
3 Malfunction Decision Conditions
When the transmission is not performed normally for a period of given time or more.
(Retry: 20 times)
4 Supposed Causes
Faulty main PC board External noises or else
Control panel display
LCMalfunction of Transmission between Inverter CPU and Temperature Control CPU
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7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect the condenser temperature and the EV valve outlet temperature and make judgment of refrigerant quantity.
3 Malfunction Decision Conditions
When q and w continue for a period of 180 seconds.qCommand capacity ≥ 95%wCondenser temperature
– EV valve outlet temperature ≤ 5°C
4 Supposed Causes
Shortage of refrigerant Clogged refrigerant piping Moisture choke Broken piping
Control panel display
U0 Shortage of Refrigerant
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect each phase in power supply phase detection circuit.
3 Malfunction Decision Conditions
qWhen reverse phase or open phase is detected in the power supply line.
wWhen any wire in the fuses [FU1 to FU3] used in the pump motor (on the AKZ series) or the agitator motor (on the AKZJ ser ies) is broken.
4 Supposed Causes
Reverse phase in power supply line
Open phase in power supply line
Faulty main PC board Overloaded operation of oil
pump Short circuit or poor
insulation of oil pump coil Short circuit or poor
insulation of agitator coil Noises in power supply line
Control panel display
UIReverse Phase/Open Phase of Power Supply or Broken Wire in Fuse
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92
7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Detect according to voltages of the inverter power supply DC unit.
3 Malfunction Decision Conditions
1. When an instantaneous power failure occurs.
2. When the power supply voltage drops below the rating × 90%.
4 Supposed Causes
Inadequate power supply voltage
Instantaneous power failure Faulty main PC board
Control panel display
U2 Malfunction due to Power Supply Voltage
×
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
Master unit side of model using the communication PC board (option)
2 Methods of Malfunction Detection
Check with the microcomputer whether or not the transmission with the slave unit is normally performed.
3 Malfunction Decision Conditions
When the transmission between the master unit and the slave unit is not performed normally for a period of given time or more.
4 Supposed Causes
Faulty main PC board Faulty connection in the
transmission line Faulty communication PC
board External noises or else
Control panel display
U9 Malfunction of Transmission with Slave Unit
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94
7 Troubleshooting
5 Troubleshooting
Diagnosis Countermeasures
1 Applicable Models
AKZ**8 (All series)AKZJ**8 (All series)
2 Methods of Malfunction Detection
Check with the microcomputer whether or not E2PROM is normal.
3 Malfunction Decision Conditions
When the E2PROM causes a failure.
4 Supposed Causes
Faulty main PC board External noises or else
Control panel display
UH System-related failure
Replace the main PC board. (For replacement
procedure, refer to page 112.)
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5 Troubleshooting
Diagnosis Countermeasures
TroubleshootingTroubleshooting
1 Applicable Models
AKZ**8 or AKZJ**8, which are connected to an external safety device, respectively
2 Methods of Malfunction Detection
Detect open or short circuit between terminals through the CN2 terminal on the main PC board.
3 Malfunction Decision Conditions
When the circuit between the CN2 terminals becomes open.
4 Supposed Causes
Actuation of external safety device
Faulty main PC board Without mounting the
external safety device, parameter setting mode is enabled. (Set to any bit other than “0” with parameter No.3.
Control panel display
UJ Actuation of External Safety Device
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8 Removing Procedure
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
q Unscrew the two screws
that hold the front panel
and then remove it.
w Unfasten the screws to
rotate the air thermistor
retainer upward.
e Unscrew the four screws
that hold the top panel
and then remove it.
r Pull out the air filter
downward.
t Unscrew the eight screws
that hold the left side panel
and then lift this panel.
y Unscrew the eight screws
that hold the right side
panel to slide this panel
upward and then pull out it
sideward.
Top panel
Left side panel
Air filter
Front panel
Air thermistor retainer
Right side panel
Top panel
Air filter
Front panel
Air thermistor retainer
Switch box (lid)
Procedure for Removing of Outside Panel Block
q Unscrew the two screws
that hold the front panel
and then remove it.
w Unfasten the screws to
rotate the air thermistor
retainer upward.
e Unscrew the five screws
that hold the top panel
and then remove it.
r Unscrew the two screws
that hold the switch box
(lid) and then remove it.
t Pull out the air filter
downward.
y Unscrew the 10 screws
that hold the left side panel
and then lift this panel.
u Unscrew the 12 screws
that hold the right side
panel to slide this panel
upward and then pull out it
sideward.
[AKZ148 to 438]
[AKZ568 and 908]
AKZ148 to 9081
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97
Work Procedure Point
Removing Procedure
Re
movin
g
Pro
ced
ure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure for
Removing of Outside Panel Block,
remove the top panel, left side
panel, and right side panel.
q Pull out the fan motor connector
from the main PC board.
w Unscrew the two screws that
hold the bell mouth mounting
plate fixing the fan motor to
remove this plate and then
pull out it to the front.
e Remove the
washer-based nut that
hold the propeller fan and
then remove the fan.
r Unscrew the four screws
that hold the fan motor
and then remove it.
Motor base
Fan motor
Propeller fan
Bell mouth mounting plate
Bell mouth mounting plate fixing screws
Washer-based nut
Fan motor
Hexagon socket head screw
Propeller fan
Fan guide
Fan guide fixing screw
Procedure for Removing of Propeller Fan/Fan Motor
q Pull out the fan motor
connector from the
inverter PC board.
w Unscrew the two screws
that hold the fan guide
fixing the fan motor to
remove this guide and
then pull out it to the front.
e Use a hexagonal wrench
to remove the propeller
fan.
r Unscrew the four screws
that hold the fan motor
and then remove it.
[AKZ148 to 438]
[AKZ568 and 908]
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98
8 Removing Procedure
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
q Remove each harness
from the electrical
component assembly.
w Unscrew the two fixing
screws that hold the
electrical component
assembly and then slide
this assembly to the left to
remove it.
Electrical component assemblyFixing screw
Fixing screw
Electrical component assembly
Fixing screw
Fixing screw
Procedure for Removing of Switch Box
q Remove all harnesses
from the electrical
component assembly.
w Unscrew the two fixing
screws that hold the
electrical component
assembly and then slide
this assembly to the left to
remove it.
[AKZ148 to 438]
[AKZ568 and 908]
In order to replace the
electrical component
assembly, replace the
setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
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99
Work Procedure Point
Removing Procedure
Re
movin
g
Pro
ced
ure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel.
CN1
Main PC board
Hook
Hook
Procedure for Removing of PC Board (AKZ148 to 438)
q Disconnect the lead wire
connector (CN1) and then
pull out the lead wire.
w Push the two stoppers that
hold the control panel and
then remove the control
panel.
1. Remove the cont ro l
panel.
q Disconnect all harnesses
from the main PC board.
w Unscrew the four screws
that hold the radiation fin
and also one vibration
isolating screw.
e Unhook the four hooks
that hold the main PC
board and remove this PC
board while peeling off the
radiation fin.
In order to replace the
main PC board, replace
the setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
2. Remove the main PC
board
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100
8 Removing Procedure
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel.
CN1
Inverter PC board
Main PC board
Hook
Hook
Procedure for Removing of PC Board (AKZ568 and 908)
q Disconnect the lead wire
connector (CN1) and then
pull out the lead wire.
w Push the two stoppers that
hold the control panel and
then remove the control
panel.
1. Remove the cont ro l
panel.
q Disconnect all harnesses
from the main PC board.
w Unscrew the four screws
that hold the radiation fin
and also one vibration
isolating screw.
e Unhook the four hooks
that hold the main PC
board and remove this PC
board while peeling off the
radiation fin.
In order to replace the
main PC board, replace
the setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
CAUTION
The inverter PC board cannot
be removed individually. Be
sure to replace it by the set of
electrical component assembly.
2. Remove the main PC
board
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101
Work Procedure Point
Removing Procedure
Re
movin
g
Pro
ced
ure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
Provide a container to
receive oil under the
evaporator.
q Unscrew the cone screw
that holds the oil inlet
thermistor.
w Unscrew the four screws
that hold the inlet socket.
e Unfasten the hose clamp
at the oil pump outlet.
r Unscrew the four screws
that hold the pump motor
base.
t Remove the oil pump
while pulling out the inlet
and outlet hoses.
Inlet socket
Oil inlet thermistor
Evaporator
Container
Oil pump
(Inlet side)
(Outlet side)Hose clamp
Inlet socket
Oil inlet thermistor
Oil pump
(Inlet side)
(Outlet side)
Container
Evaporator
Hose clamp
Procedure for Removing Oil Pump
[AKZ148 to 438]
[AKZ908]
When the hose band
on the oilpump outlet is
unfastened, the large
amount (approx. 1 liter) of
oil flows out.
Provide a contaimer to
receive it.
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102
8 Removing Procedure
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel. EV valve coil
EV valve main unit
Brazed sections
Strainer
EV valve outlet temperature thermistor
Thermistor fixing spring
High pressure switch
Service port
Procedure for Removing of EV Valve / High Pressure Switch
Remove the EV valve.
q Recover the refrigerant
through the service port.
w Pull out the EV valve coil
upward.
e Remove the EV valve
outlet thermistor.
r Disconnect the two brazed
sections that hold the EV
valve main unit and then
remove it.
Before removing work,
be sure to recover the
refrigerant.
In order to replace the
EV valve main unit,
perform the “pulse
detection operation
with the EV valve fully
closed” referring to the
“Replacement procedure”
(on page 113).
When mounting the EV
valve main unit, mount
the strainer without
fail. (For the mounting
direction, refer to Figure
on the left.)
Remove the high pressure switch.
q Use two spanners to
remove the high pressure
switch.
Since the service port
is provided with a check
valve, the high pressure
switch can be removed
without discharging the
refrigerant.
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103
Work Procedure Point
Removing Procedure
Re
movin
g
Pro
ced
ure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
Brazed sections
Compressor lead wire
Compressor mounting nut
Procedure for Removing of Compressor
q Recover the refrigerant
through the service port.
w Disconnect the lead wire
from the compressor
terminal.
e Unscrew the three nuts
that hold the compressor.
r Disconnect the two brazed
sections that hold the
compressor and then
remove it.
Before Removing work,
be sure to recover the
refrigerant.
U
N
W
V
Compressor terminal symbol
(Red)
(Brown)
(Blue)
(Yellow)
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104
Work Procedure Point
8 Removing Procedure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
q Unscrew the two screws
that hold the front panel
and then remove it.
w Unfasten the screws to
rotate the air thermistor
retainer upward.
e Unscrew the four screws
that hold the top panel
and then remove it.
r Pull out the air filter
downward.
t Unscrew the eight screws
that hold the left side panel
and then lift this panel.
y Unscrew the eight screws
that hold the right side
panel to slide this panel
upward and then pull out it
sideward.
Top panel
Right side panelLeft side
panel
Front panel
Air filter
Air thermistor retainer
Top panel
Front panel
Switch box (lid)
Air filter
Air thermistor retainer
Procedure for Removing of Outside Panel Block
q Unscrew the two screws
that hold the front panel
and then remove it.
w Unfasten the screws to
rotate the air thermistor
retainer upward.
e Unscrew the five screws
that hold the top panel
and then remove it.
r Unscrew the two screws
that hold the switch box
(lid) and then remove it.
t Pull out the air filter
downward.
y Unscrew the 10 screws
that hold the left side panel
and then lift this panel.
u Unscrew the 12 screws
that hold the right side
panel to slide this panel
upward and then pull out it
sideward.
[AKZJ188 to 458]
[AKZJ568 and 908]
AKZJ188 to 9082
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105
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Removing Procedure
Re
movin
g
Pro
ced
ure
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
q Pull out the fan motor
connector from the main
PC board.
w Unscrew the two screws
that hold the bell mouth
mounting plate fixing the
fan motor to remove this
plate and then pull out it to
the front.
e Remove the
washer-based nut that
hold the propeller fan and
then remove the fan.
r Unscrew the four screws
that hold the fan motor
and then remove it.
Motor base
Fan motor
Propeller fan
Washer-based nut
Bell mouth mounting plate
Bell mouth mounting plate fixing screws
Procedure for Removing of Propeller Fan/Fan Motor
q Pull out the fan motor
connector from the inverter
PC board.
w Unscrew the two screws
that hold the fan guide fixing
the fan motor to remove
this guide and then pull out
it to the front.
e Use a hexagonal wrench to
remove the propeller fan.
r Unscrew the four screws
that hold the fan motor and
then remove it.
[AKZJ188 to 458]
[AKZJ568 and 908]
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106
Work Procedure Point
8 Removing Procedure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
q Remove each harness
from the electrical
component assembly.
w Unscrew the two fixing
screws that hold the
electrical component
assembly and then slide
this assembly to the left to
remove it.
Electrical component assembly
Fixing screw
Fixing screw
Procedure for Removing of Switch Box
q Remove all harnesses
from the electrical
component assembly.
w Unscrew the two fixing
screws that hold the
electrical component
assembly and then slide
this assembly to the left to
remove it.
[AKZJ188 to 458]
Electrical component assembly
Fixing screwFixing screw
[AKZJ568 and 908]
In order to replace the
electrical component
assembly, replace the
setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
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107
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Removing Procedure
Re
movin
g
Pro
ced
ure
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel.
CN1
Control panel
Main PC board
Hook
Hook
q Disconnect the lead wire
connector (CN1) and then
pull out the lead wire.
w Push the two stoppers that
hold the control panel and
then remove the control
panel.
1. Remove the cont ro l
panel.
q Disconnect all harnesses
from the main PC board.
w Unscrew the four screws
that hold the radiation fin
and also one vibration
isolating screw.
e Unhook the four hooks
that hold the main PC
board and remove this PC
board while peeling off the
radiation fin.
In order to replace the
main PC board, replace
the setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
Procedure for Removing of PC Board (AKZJ188 to 458)
2. Remove the main PC
board.
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108
Work Procedure Point
8 Removing Procedure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel.
CN1
Control panel
Inverter PC board
Main PC board
Hook
Hook
In order to replace the
main PC board, replace
the setting data referring
to information in “Main
PC board replacement
procedure” (on page 112).
Procedure for Removing of PC Board (AKZJ568 and 908)
q Disconnect the lead wire
connector (CN1) and then
pull out the lead wire.
w Push the two stoppers that
hold the control panel and
then remove the control
panel.
1. Remove the cont ro l
panel.
q Disconnect all harnesses
from the main PC board.
w Unscrew the four screws
that hold the radiation fin.
e Unhook the four hooks
that hold the main PC
board and remove this PC
board while peeling off the
radiation fin.
2. Remove the main PC
board.
CAUTION
The inverter PC board cannot
be removed individually. Be
sure to replace it by the set of
electrical component assembly.
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109
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Removing Procedure
Re
movin
g
Pro
ced
ure
Procedure for Removing of EV Valve / High Pressure Switch
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel. EV valve coil
EV valve main unit
Brazed sections
Strainer
EV valve outlet temperature thermistor
Thermistor fixing spring
High pressure switch
Service port
Remove the EV valve.
q Recover the refrigerant
through the service port.
w Pull out the EV valve coil
upward.
e Remove the EV valve
outlet thermistor.
r Disconnect the two brazed
sections that hold the EV
valve main unit and then
remove it.
Before removing work,
be sure to recover the
refrigerant.
In order to replace the
EV valve main unit,
perform the “pulse
detection operation
with the EV valve fully
closed” referring to the
“Replacement procedure”
(on page 113).
When mounting the EV
valve main unit, mount
the strainer without
fail. (For the mounting
direction, refer to Figure
on the left.)
Remove the high
pressure switch.
q Use two spanners to
remove the high pressure
switch.
Since the service port
is provided with a check
valve, the high pressure
switch can be removed
without discharging the
refrigerant.
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110
Work Procedure Point
8 Removing Procedure
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
Brazed sections
Compressor lead wire
Compressor mounting nut
Procedure for Removing of Compressor
q Recover the refrigerant
through the service port.
w Disconnect the lead wire
from the compressor
terminal.
e Unscrew the three nuts
that hold the compressor.
r Disconnect the two brazed
sections that hold the
compressor and then
remove it.
Before removing work,
be sure to recover the
refrigerant.
U
N
W
V
Compressor terminal symbol
(Red)
(Brown)
(Blue)
(Yellow)
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111
Work Procedure Point
WARNING
Before removing work, be sure
to turn OFF all power supplies.
Removing Procedure
Re
movin
g
Pro
ced
ure
Procedure for Removing of Agitator Motor / Evaporator
Following the Procedure
for Removing of Outside
Panel Block, remove the
top panel, left side panel,
and right side panel.
Remove the agitator
motor.
q Disconnect the motor
connector.
w Unscrew the one screw
that holds the agitator
plate and then remove it.
e Unscrew the four external
screws that hold the
agitator motor and then
remove it.
Remove the evaporator.
q Place the equipment on
the worktable.
w Discharge the refrigerant
through the service port.
e Remove the two legs from
the bottom frame.
r Disconnect the two brazed
sections (*1).
*1: Four brazed sections
on J568 and J908
models.
t Pull the evaporator
downward to remove it.
Agitator motor
Agitator plate
Legs
Brazedsections
Evaporator
Agitator motor
Agitator plate
Legs
Evaporator
Brazedsections
[AKZJ188 to 458]
[AKZJ568 and 908]
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112
9 Replacement Procedure
For the replacement of the main PC board, check to be sure the model name of the main unit of Oil Cooling Unit corresponds to the applicable model of the PC board and then following the procedure shown below.
↓
Procedure for Replacing Main PC Board1
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113
Replacement Procedure
Replacem
ent P
rocedure
In order to replace the EV valve main unit, be sure to perform the pulse detection operation with the EV valve fully closed. (The reason is that the pulse to fully close the EV valve varies.)Replace the EV valve main unit according to the following procedure. (In order to only replace the EV valve coil, the detection operation is not needed to perform.)
↓
Procedure for Replacing EV Valve Main Unit2
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114
10 Miscellaneous Reference Data
Ω
Figure and Table below show the characteristics of thermistors used in this Oil Cooling Unit.In order to check the thermistors for troubleshooting, disconnect the connector to measure the resistance of the thermistor concerned and then compare the measured resistance with the characteristic value.
Temperature (°C) 0 10 15 20 25 30 35 40 45 50 55 60 65
Resistance (kΩ) 67.33 40.38 31.69 25.08 20.00 16.07 13.01 10.60 8.69 7.17 5.95 4.97 4.17
Temperature (°C) 70 75 80 85 90 95 100 105 110 115 120 125 130
Resistance (kΩ) 3.51 2.98 2.54 2.17 1.86 1.61 1.39 1.21 1.06 0.92 0.81 0.72 0.63
Thermistor Temperature/Resistance Characteristics1
Refrigerant (R410A) Characteristics2
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115
Miscellaneous Reference Data
Miscellaneous
Reference D
ata
3-1. Machine Body Synchronization Thermistor/Optional Oil Temperature ThermistorqSymbol and intended use by typeMounting this optional part to the oil piping of the main machine makes it possible to detect and control the temperature.
wMounting procedure
AKZ 8-OP-K5
AKZ 8-OP-Y10
AKZ 8-OP-Y5
AKZ 8-OP-A10
AKZ 8-OP-A5
AKZ 8-OP-K10
Ω
φ×
Procedure for Mounting Optional Parts3
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116
10 Miscellaneous Reference Data
3-2. Communication PC Board (Option)Mounting this communication PC board to the Oil Cooling Unit and then linking with the main machine enables the following functions.1. Operation modes and operation settings can be changed from the main machine.2. Malfunction codes and temperature data (i.e., machine body temperature, room temperature, inlet oil temperature,
outlet oil temperature, temperature differential between inlet and outlet, and inverter frequency) can be read on the main machine side.
××
××
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K
Thank you very much for usual patronage to Daikin products.
We have completed and pleased to present the Oil Cooling Unit (Model 8) Service Manual.
We at Daikin provide an extensive lineup of models to respond to high-accuracy
temperature control and needs for energy saving with the Oil Cooling Unit and appreciate
your further loyal patronage.
This Service Manual includes information on troubleshooting and a variety of services.
Please make use of the Service Manual for your servicing of the Oil Cooling Unit.
After Sales Service Division
June 2005
Preface
Name of information Models listed Date of issue
Oil Cooling Unit
(Model 8)
Service Manual
• AKZ148 to 908
• AKZJ188 to 908
June
2005
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SiOCU05-001