air con service manual

1

Service manual

Room airconditioner

Split Wall-Mounted Type

NOTE:

Before servicing the unit, please read this first

Always contact with your service center if meet

problem.

2

Table of Contents

1Summary 3

2Model explaining .4

3Installation..4

4Exploded view and part list..8

5Operation principle.9

6Specifications10

7Wiring diagrams...11

8PCB principle chart.....16

9PCB function ......17

10Troubleshooting....33

3

1. Summary

1.1 indoor unit

Model 38B model 85

1.2 outdoor unit

9000BTU 1200018000 BTU

22000 BTU 2400026000 BTU

4

2Model explaining

c

Improve an ordinal number

Divide the body outdoors box a body code

External appearance characteristic code

Separately the body indoor machine(or whole type) style code

Code of refrigerant typeno code - R22C-R407cA-R410a

Power type1:115v/60Hz 2:220V/60Hz3:220-240V/

50Hz4:240V/50Hz

Main function code: c-Cold breeze type;H-Hot pump type;A-Hot

pump the type take assistance electricity to heat;E-The electricity

heat

Capacity code: x1000W

Separately the body pit code inside the indoor machine(or whole

type)

Structure form code

Special craft code:Q-Deal with contact quickly;S-Soft start;d-

Outside tube in addition to frost

The weather type code(T1 type code abridge)

"C" CHIGO brand

Such as: CS-25C3A-V85AY1

T1 climate type,wall split type air conditioner, cooling capacity is 2500Wpower is 220V/50Hz/1PH

refrigeration is R410A,the kernel of indoor unit is fresh 98the pattern no. is 85first time design, outdoor unit is 1HP

of 2003 year

Indoor unit modle isCS-25C3A-V85Aoutdoor unit model isCS-25C3A-Y1

5

3. Attention of installation

3.1 Safety Precaution

To prevent injury to the user or other people and property damage, the following instructions must be followed.

Incorrect operation due to ignoring instruction will cause harm or damage.

Before service unit, be sure to read this service manual at first.

3.2 Warning

Installation

Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

There is risk of fire or electric shock.

For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service center.

Do not disassemble or repair the product, there is risk of fire or electric shock.

Always ground the product.


Install the panel and the cover of control box securely.

There is risk of fire of electric shock.

Always install a dedicated circuit and breaker.

Improper wiring or installation may cause fore or electric shock.

Use the correctly rated breaker of fuse.


Do not modify or extend the power cable.


Do not install, remove, or reinstall the unit by yourself (customer).

There is risk of fire, electric shock, explosion, or injury.

Be caution when unpacking and installing the product.

Sharp edges could cause injury, be especially careful of the case edges and the fins on the condenser and evaporator.

For installation, always contact the dealer or an Authorized service center.

There is risk of fire, electric shock, explosion, or injury.

Do not install the product on a defective installation stand.

It may cause injury, accident, or damage to the product.

6

Be sure the installation area does not deteriorate with age.

If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.

Do not let the air conditioner run for a long time when the humidity is very high and a door or a windows is left open.

Moisture may condense and wet or damage furniture.

Take care to ensure that power cable could not be pulled out or damaged during operation.


Do not place anything on the power cable.


Do not plug or unplug the power supply plug during operation.


Do not touch (operation) the product with wet hands.


Do not place a heater or other appliance near the power cable.

There is risk of fire and electric shock.

Do not allow water to run into electric parts.

It may cause fire, failure of the product, or electric shock.

Do not store or use flammable gas or combustible near the product.

There is risk of fire or failure of product.

Do not use the product in a tightly closed space for a long time.

Oxygen deficiency could occur.

When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on.

Do not use the telephone or turn switches on or off. There is risk of explosion or fire.

If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable.

There is risk of electric shock or fire.

Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane

arrives.

There is risk of property damage, failure of product, or electric shock.

Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

There is risk of physical injury, electric shock, or product failure.

When the product is soaked (flooded or submerged), contact an Authorized service center.


Be caution that water could not enter the product.

7

There is risk of fire, electric shock, or product damage.

Ventilate the product from time to time when operating it together with a stove, etc.


Turn the main power off when cleaning or maintaining the product.

There is risk of electric shock.

When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker.

There is risk of product damage or failure, or unintended operation.

Take care to ensure that nobody could step on or fall onto the outdoor unit.

This could result in personal injury and product damage.

CAUTION

Always check for gas (refrigerant) leakage after installation or repair of product.

Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is drained away properly.

A bad connection may cause water leakage.

Keep level even when installing the product.

To avoid vibration of water leakage.

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

It may cause a problem for your neighbors.

Use two or more people to lift and transport the product.

Avoid personal injury.

Do not install the product where it will be exposed to sea wind (salt spray) directly.

It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or

inefficient operation.

Operational

Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft).

This could harm to your health.

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a

precision refrigerant system.

There is risk of damage or loss of property.

Do not block the inlet or outlet of air flow.

It may cause product failure.

8

Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.

There is risk of fire, electric shock, or damage to the plastic parts of the product.

Do not touch the metal parts of the product when removing the air filter. They are very sharp.

There is risk of personal injury.

Do not step on pr put anything on the product. (outdoor units)

There is risk of personal injury and failure of product.

Always insert the filter securely. Clean the filter every two weeks or more often if necessary.

A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.

Do not insert hands or other object through air inlet or outlet while the product is operated.

There are sharp and moving parts that could cause personal injury.

Do not drink the water drained from the product.

It is not sanitary could cause serious health issues.

Use a firm stool or ladder when cleaning or maintaining the product.

Be careful and avoid personal injury.

Replace the all batteries in the remote control with new ones of the same type. Do not mix old and mew batteries or different types of

batteries.

There is risk of fire or explosion.

Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.

They may burn of explode.

If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote of the batteries have

leaked.

The chemical in batteries could cause burns or other health hazards.

3.3 Installation details

Wrench torque sheet for installation

Outside diameter Torque

mm inch Kg.m

6.35 1/4 1.8

9.52 3/8 4.2

12.7 1/2 5.5

15.88 5/8 6.6

19.05 3/4 6.6

9

Connecting the cables

The power cord of connect should be selected according to the following specifications sheet.

Grade

Unit 7K 9K 12K 18K 24K 28K

mm2 1.0 1.0 1.5 2.5 2.5 2.5

Pipe length and the elevation

Capacity Pipe size

Standard length Max. Max. Additional

(m) Elevation Elevation refrigerant

Btu/h GAS LIQUID B (m) A (m) (g/m)

9K-12K 3/8 (9.52) 1/4 (6.35) 3.5 5 10 30

18K-22K 1/2 (12.7) 1/4 (6.35) 4 10 15 30

24K-28K 5/8 (15.88) 3/8 (9.52) 5 15 20 65

Caution:Capacity is base on standard length and maximum allowance length is base of reliability.Oil

trap should be install per 5-7 meters.

4Indoor unit and outdoor unit explosion diagram and spare parts list(see explosion diagram file)

5. Refrigerant cycle diagram

5.1 Cooling only

10

5.2 Heat pump mode

6. Specifications (see spec sheet)

11

7.Wiring diagrams

7.1Indoor unit

15

7.2 Outdoor unit

16

8.PCB principle chart

8.138 section of crystal color ordinary schematic diagram

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

CN4T

D1-D4

IN4001

Vin1

GN

D

2

OUT3

IC4 7805

T

Z R

471 10A

E 1

1000UF/35V

E 3

220UF/16V

C1

104

C3

104

X3A

X4A

R1 51 /1W

GND

+5B

CNB

FMC

CM

U

N

FUSE

F3A 250V

U1

N1

MC2003

B

B

JZC-7F*2

5

6

7

4

3

2

1

12

11

10

13

14

15

16

8

GND

GND

52X4B

52X5B

52X6B

52CB

9

Q3

1815

R7 4.7K

Q2

9013

R13 4.7K

26

BUZZ

P03

P237

C24

102

D6

IN4148

C13

104

E 4

22UF/25F

B

R33

2K

BZ

GND GND

C17

104

GND

C21

104/275V

+5

C7104

C9104

R20

4.3K

R19 510

C8104

R18

4.3k

R17 510

C6104

TEMP

Tp

Tr

43

21

P21/AN1

P20/AN0

5

4

CNG

/RESET11

D5

AC.ZERO

XL

8.00R15

300K

R2

4.7K

R3 10K

C11

102

R22

10K

+5

R5

4.7K

Q1

C1815

C12

102

R23 4.7K

+5

R24 10K

R4 10K

+5

C18

101

R21

4.7K

R16

10K

+5

SW 1

15

14

AC..ZERO

32

1CNTR0

INT0

Xout

Xin

Vcc13

3

22

P14

P37

16Vss

6P22

P3421

CNW

+5

C4 104

E 5

10uf/16FC14

102

GNDGND

GND

GNDGND

GNDGND

GNDGND

GND

GND

GND

GND

GND

P11

P0023

32

R27 51

R26 51

C15

102

C16

102

R9

4.7K

R8

4.7K

D11 4148 D9 4148 D7 4148

R10

4.7K

Q6

9012

R11

4.7K

R12

4.7K

+5

Q4

9012

Q5

9012

P12

P13

1

2

P259

P3017

P3118

heat/cool

dhon/off

D12 4148 D10 4148 D8 4148

R31

4.7K

R30

4.7K

R32

4.7K

TYPE1.0HSTP.0

HSTP.1

/

/ TYPE1.1

GND

+5

+5

+5

2

3

COM3

COM2

COM1

CLOCK

DATA

S

GND

+5V

1

CN1

GND

GND

27

28

29

30

P04

P05

P06

P07

31

25P02

P10

P0124

+5

R14

390IC5

MC3021

R6 4.7K

Q7

1815

IC6

BCR

R37 330

R36

220

C20

473/275V

P248

L 1

CFI

1.2uF

N

C23

104/275V U2

GND

CNU

5

4

3

2

1

1

4

6

2

1

5

3

3

21

5

4

3

1

2

GND

C5

102

C10

102

GND

GND

C19

104

R25

510

GND

52C-1A

52X6A

COM

CN

COM

GND

CN D

U1

HS0 0 3 8

3754438

4

5

6

CL OC K

DA TA

E 1 22UF/16V

+-

S

123

RMT

R1 51

+51 4

C3 C2

1 0 21 0 2

R1110K

R1210K

GND

+5

B1

A2

Q0

3

Q1

4

Q2

5

Q4

10

Q5

11

Q6

12

CL

K

8

MR

9

Q3

6V

ss

7

Q7

13

IC1

74AL S164

R7510*8

R3

R2

R4

R9

R8

R6

R5

a

bf

c

g

e

co

m2

dp

a

bf

c

g

e dp

co

m1

dd

L E D

DPY-8*2

L E D6

L E D7

L E D5

L E D4

L E D1

L E D2

gbc fhd ae

D2

D1

L E D3

8

7

Q 6 A

Q 7 F

Q 0 E

Q 1 D

Q 2

Q 5

Q 4

Q 3

2 S

3 +5 V

1 GN D

COM3

COM2

COM1

3

1 2 3

456

78

AT 2 4 C0 2

R28 4.7K

R29 4.7K

GND

+5

+5

20S

FMO

CN

C22

104/275

L 2

JL C0301

L 3

JL C0301U2

IC7

10

R35

4.7K12

19

20

P32

P33

CN M

E 2

220UF/35V

C2

104

JS2-B38aC-M15A/0

+5

R38

10K

GND

Q 8

9 0 1 2

R39

10K

R34

2K

E 81uF/50V

C28102

GND

8.265 Mitsubishi main chip schematic diagram

17

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

D1 -D 4

E1

4 7 0 uF/3 5 V

FU SE

2 5 0 V/3 .1 5 A

S1

B

C1

1 0 4

C2

1 0 4

Vin1

GN

D

2

Vout3

IC 6

7 8 0 5 +5

C2 2

0 .1 uf/27 5 V

S2

2 0 S

FMO

R2 5

1 0 0 /1 W

C2 1

0 .1 UF/27 5 V

E2

2 2 0 UF/2 5 V

E6

2 2 UF/25 V

P1 0

P3 2

P3 3

P3 4

P0 0

P1 3

P0 2

P1 2

P0 1

P0 5

P0 4

P0 6

P0 7

P0 3

1 0 A- 1 8 0 - 6 2 1

I C1

CNCCNB

M3 7 54 4 G2 ASP

3 1

2 6

3 0

2 9

1 9

2 0

2 1

2

2 3

2 5

1

2 4

2 8

2 7

L1

R7

1 0 K

R6

4 .7 K

GND

T1

C31 0 4

C1 2 1 0 4GND

BCN M1 CN M2

+12

X2 A

5 2 CA

5 2 X6 A

X1 A

X5 A

X3 A

X4 A

B

E3

1 0 0 UF/2 5 V

5 2 CB

5 2 X6 B

X1 B

X2 B

X5 B

X4 B

X3 B

CN U

CFO

3 .5 UF/50 0 V

CN 1

C2 0

1 0 4

E8

1 0 0 uf/25 V

Vc c1 3

GND

P3 1

P3 7

1 8

2 2

R1 6

4 .7 K

R1 8

4 .7 K

R1 7

4 .3 K

R1 9

4 .3 KC1 6

1 0 4

C1 4

1 0 4

+5P2 5 / AN5

P2 4 / AN48

9

GND

GND

CN G1

tTR

tTP

R2 4

1 0 K

R2 5 4 .7 k

SW1

C1 9

1 0 4

P2 3 / AN3

P2 1

7

4

5

P2 0

AR 5

GND

GND

+5

C6

1 0 2

E4

1 0 0 UF/2 5 V

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAMP9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC 32 0 0 3

710

89

IC 2 G

611IC 2 F

512IC 2 E

413

IC 2 D

314

IC 2 C

215

IC 2 B

116

IC 2 A

2 0 0 3

FU SE+ZR

GND+5

C1 31 0 4

C1 51 0 4

GND

GND

E71 0 UF

GND

+5

NC

CN

B

CN1 2 0

COM

1

6

4

3

2

6

7

8

1 0Vr e f

Vs s1 6

BZ2 KR14

P3 01 7

25v

4007

L

C1 81 0 3

IC 4

IC 5

D6

IN 4 0 0 7

R2 3

2 0 0 K/2 W

R2 2

2 0 0 K/2 W

1 0 K

C1 71 0 3 D5

IN 4 0 0 7

FE ED

DE FR OSTE R

GND

GNDR2 1

1 0 K

+5V

DA 1

DA 2

DA 3

DA 4

AR 5

()

4.7K

103

GND

390390

GND +5V

Q2

9012

Q3

9012

Q4

9012

4.7K

4.7K

4.7K

+5V

+5V

+5V

102

102

102

GND

GND

GND

CLK

DATA

COM 1

COM 2

COM 3

COM 1

COM 2

P2 2 / AN2 6

C51 0 2

GND

R1

51 /2W

R5 R4

R3

R2

C7

R12

C8

C9

R20

C10

R13

C2 1

1 0 4

CN1

E 10

22UF/25VC22

104

+5

(37544) 65/

XL 1

8 M

R3 0

3 0 0 K

GND

Xi n

Xo ut

1 4

1 5

GND

+5

R3 32 K

1 1

RESET

E1 0

4 .7 uF/5 0 v

A01

A12

A23

GND4

SDA5

SCL6

WP7

VCC8

IC 8

2 4 C0 2

GND

4.7K4.7K

R28

+5

3 2

P1 1

P1 43

E5

1 0 0 uf/25 V****************

C4

1 0 4****************

Q1

9012

R3 21 0 K

R3 1

1 0 K

R3 4

5 1 0

R29

R M T _IN

P 11 P 10

R8

4 .7 K

R9

4 .7 K

DA 5

IN 4 1 4 8

DA 6

IN 4 1 4 8****************

DA 4

IN 4 1 4 8

DA 3

IN 4 1 4 8

P21P07

R1 0

4 .7 K

R1 1

4 .7 K

GND

DA 2

IN 4 1 4 8

DA 1

IN 4 1 4 8

P20

R2 7

4 .7 K

R2 6

4 .7 K

JS2-B65aC-M11A/0

R3 5

4 .7 K

R3 6

4 .3 K

C2 4

1 0 4

+5

2

C2 3

1 0 4

GND

t

TP2

GND

CNG2

AA AA

DA 5

T YPE _IN1

T YPE _IN2

GND

CNVs s 1 2

R3 7

4 .7 K****************

GND

8.385 section of schematic diagrams

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

E 2

220UF/25V

E 1

1000UF/35V

C30

104C25

104

+5

FUSE

3.15A 250V

IN 4 0 0 7D1 --D 4

ZR

621-10-126

T RANSCN B

Vin1

GN

D

2

OUT3

IC5 7 8 0 5

CN C

GND

X5B

B

U1

BNO

B

FMC

CM

12

CN1

U

U

S

FMO

1

4

2

3

L

EF- 1 0 05 G

C1

104/275V

C2

104/275V

IC2

D5

IN 4 0 0 7

5 2 C12 V

5 2 X6

9 5 3 -1 A

NO COMHE AT

COM

U

B

2 0 S

5 2 X5 AU1

5 2 X4 A

R3

3 3 0

+5V

1

2

4

6

IC4

BT 131

R4 6

3 9 0

L 3

U1

C3 1 0 4 / 2 75 V

CFI

1 . 2 UF / 4 5 0 VAC R1

2 2 0 IW

C3 5

4 7 3 / 2 75 V

MF1

N1

Z

5

1

R27 10K

R26 10K

R3 0

4 .3 K

R3 1

4 .3 K

C21C20

GND

GND

GND

1 0 4 1 0 4

CNG

+5V

E 8

100UF/25V

C31104

GND

GND

+5

1

4

5VD D

VSS

TE ST

R32

10k

R25 4.7k

C19

102

GND

C15

102

GND

+5

3

2

1

CNM +5

GND

R42 10K2 2P1 0

C24102

GND

Q2

1815

GND

R10

4.7K

+5

ZR9 10K

C27

103

R8

4.7K

GND

RX

300K

GND

XL8M

2XI N

XOUT 3

R4 3

1 0 K

E7 4 .7 UF/50 V

D6IN 4 1 4 8

+5

GND

SW1

R2 4

4 . 7 kGND

8RE SET

GND

R28 10K

R2 9

4 .3 K

GND

+5V12

CNP

2

C22

104

C18

104

R1 3

1 0 k

+5V

C7102

GND

R19220*3

R17

C14

102

R20220

GND

R4 4

4 .7 k

R23

R22

+5

GND

D8

4 1 4 8

D1 2

4 1 4 8

D1 0

4 1 4 8

E 9

22UF/16V

C33

104

+5

C28

102

GND

CNE

C13

102

C12

102

C11

102

GND

1

2

3

4

5

6

R15 R18

10k*5

R14 R16

C9

102

R21 220

+5

GND

A01

A12

A23

GND4

SDA5

SCL6

WP7

VCC8

IC5 24C02

GND

+5VE6

1 0 0 uF / 2 5 V

R11

4.7k*2

R12

+5

C10

102

C8

102

GND

R7 5 1

R6 5 1

CL OC K

DA TA 1

2

345

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

G N D

R4

4.7K

R5

4.7K

Q1

9013

M7 4 H5 9 5

RC K

VC C

SCL R

GN D

G

SISCK

Q H*

Q H

Q G

Q F

Q E

Q D

Q C

Q B

Q A

IC 1 3

G N D

+5

+5

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAMP9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC15 2003

CNM1

CNM2

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAMP9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC16

2003

GND

B

R394.7K

R34

R40

R35

R37

R38

R36

R4110K

+5

GND

CNM

BZ

GND

52X6A

X1A

X2A

52CA

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAMP9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC14 2003

B

B

R3 3

2 K

H F 2 16 0-1A -1 2D E

X5A

P1 1 2 3

B

GND

P1 2 2 4

C32

102

GND

C17

104 C16104

C26 102

CN A

S1

S1

R2

2 2 0 IW

C1

47

3/

27

5V

X 5B

U1

1 7

1 5

1 6

1 8

2 5

3 2

3 1

3 0

9

1 1

1 2

1 3

1 0

2 9

2 8

2 6

2 1

2 0

1 9

7

6

2 7

1 4

D7

4 1 4 8

D1 1

4 1 4 8

D9

4 1 4 8R4 5

4 .7 k

+5

C29

102

GND

E3 1 0 0 UF/2 5 V

E4

1 0 0 UF/2 5 VC5 104

B

B BE5

4 7 UF/25 V

+5

C34

102

C23 104

GND

CNL

R47 4.7k

IC1 T MP86F809NG

E 9

22UF/16V

C6 104

C36

104

C37

104

M70 80985

JS2-B85aC-T01A/0

8.4Three water chestnut 18NV 85 section of entire compatible electrically controlled schematic diagrams

18

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

VALVE

EFAN

CF

LO

MI D

HI

N

CFI

52 CB

X4 B

X3 B

X2 B

X1 B

52 X6 B

X5 B

COM

COM

CN

CN

L

HEAT

CM

FMC

MF1

U1

2 6 P0 3

2 7 P0 4

2 8 P0 5

2 0 P3 3

1 8 P3 1

1 7 P3 0

1 9 P3 2

52 CB

X1 B

X5 B

X4 B

13 4

I C3E

20 03

15 2

I C3C

20 03

14 3

I C3D

20 03

CNH

52 X6 B

X3 B

16 1

I C3B

UL 20 03

X2 B

B

P1 1 3 2

3 P1 4 / CNTR0

P3 4 2 1

P3 7 2 2

1 1 / RESET

XL

8. 00

R4 1

30 0K

1 5

1 4 Xi n

Xo ut

GND

SW1

8 P2 4 / AN

9 P2 5 / AN

R1 2

4. 3K

R1 3

4. 3K

t

t

R1 4

39 0

R1 5

39 0

C1 0

10 4

C1 1

10 4

C9

10 4

C8

10 4

GND

GND

+5

2

1

3

4

CNG

2 P1 3

P1 2 1

R2 2

10 k

+5

R2 3

10 k

GND

1 2 CNVs sR2 4. 7K

GND

Vs s 1 6

C N 13 3

P2 0 / AN 4

P2 1 / AN 5

P2 2 / AN 6

13 4

I C4E

20 03

15 2

I C4C

20 03

14 3

I C4D

20 03

BZ

7 P2 3

B

E6

22 uf / 2 5V

GND

3

2

GND

1

1

2

3

1

2

3

4

5

CN1 6 1

CN -AC

CN12

C 5

104

GND

R 3 51 0

IC1

1 2 3

456

78

A T2 4C 0 2

R 40

4.7K

R 39

4.7K

GND

+5+5 IC5

E8

4.7u f/2 5F

10 0 R34

10 0 R35

B

GND

R 5

2K

10 0R6

22 0R7

10 0u F/25V

E 7

GND

A 10 15

Q3

+12V

4.7KR8

M3

75

44

G2

SP

SCL

SDA

Vc c 1 3

C1 2

10 4

E5

10 uf / 1 6v

GND

Vr e f 1 0+5V

611IC4F

512IC4E

2003

AJ1

Q7

90 12

R4610K

R44

2K

R45

10K

P0 2 2 5

P0 1 2 4

P0 0 2 3

P0 7 3 0

P1 0 3 1 R3 2

4 .7 K

R3 3

4 .7 K

D6 4 1 4 8 D8 4 1 4 8 D1 0 4 1 4 8

+5

D7 4 1 4 8 D9 4 1 4 8 D1 1 4 1 4 8

R9 2 2 0

R1 0 2 2 0

8

9

GND

AA

BB

AA

BB

4

5

6

CN 1 2 3

+5V

ST B

HS0 0 3 8

E2

2 2 UF/16 V

+-

S

1

2

3

RMT

R1 5 1

2 S

1 +5 V

3 GN D

+5V

1u F/50 V

E 10

GND

10 0 R36

C2 2

10 2

C2 3

10 2

C2 4

10 2

GND

C6104

R4

4.7KR114.3K

C7104

1

2

CNG2

2

+5V

GND

C2 0 10 4

E9

22 Uf / 5 0V

TRANS

D1 - D4

4 0 0 1

E1

1 0 0 0 UF/ 3 5 V

E3

4 7 0 UF/ 2 5 V

C1

1 0 4

C3

1 0 4

Vin1

GN

D

2

OUT3

I C4

7 8 0 5

GND

2

3

1

4

L 1

AC- N

C1 2

1 0 4 / 2 75

FUSE

ON

B +5

FUSE+ ZR L

U1

IC1

C2

104E1

4 7 0 UF/ 5 0 V

C10

102

C8

102

R4 7 5 1

R4 6 5 1

CL OC KDA TA

8

1 1

1 3

1 4

R44

4.7K

R45

4.7K

Q6

9013

M7 4 H5 9 5

RC K 1 2

VC C 1 6

SCL R 1 0

GN D

G

SISCK

Q H* 9

Q H 7

Q G 6

Q F 5Q E 4

Q D 3Q C 2

Q B 1Q A 1 5

IC 3

GND

GND

+5V

+5V

E4

4 7 UF/16 VGND

+5V

B

E7

22 uf / 2 5V

GND

1

2

3

4

5

CNM

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAM P9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC6

2003

GNDC4

104B

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAM P9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC7

2003

GNDC5

104B

JS2-B85AC-M01A/0

3754418NV P85

8.5Mitsubishi Jin dynasty 85 model of simple three lamp electrically controlled motherboards

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

CN C

D1 -D 4

IN 4 0 0 7

Vin1

GN

D

2

OUT3

IC 8 7 8 0 5

T

E1 0

1 0 0 0 UF/3 5 V

E1 1

2 2 0 UF/2 5 V

C41 0 4

C6

1 0 4

X2 A

X1 A

GND

+5B

CN B

FMC

CM

L

N

FU SE

F3 .1 5 A 2 5 0 V ACU1

N 1

M C 20 03

B

B

1

4

5

6

7

2

16

13

12

11

10

15

GND

X1 B

X2 B

5 2 X6 B

5 2 CB

9

30P07

P3421

C9 1 0 4E44 7 uF/2 5 V

B

C31 0 4 /2 75 V AC

+5

C2 61 0 4

C2 11 0 4

R1 7

4 .3 K

R1 1 0 K

C2 41 0 4

R3 2

4 .3 k

R1 4 1 0 K

C2 01 0 4

TEMP

Tp

Tr

34

21 P20

P21

4

5

CNG

D1 2

IN 4 0 0 7

AC.ZERO

XL

8 .0 0RX

3 0 0 K

R3 0

1 0 K

R2 0 2 K

C2 5

1 0 3

R3

1 0 K

+5

R2 7

1 0 K

Q 1C1 8 1 5

R1 6 4 .7 K

R4

1 0 K

R2

1 0 K

+5

C1 3

1 0 2

R3 1 4 .7 K

14

15

AC..ZERO

32

1

INT10

CNTR0

Xout

Xin

Vcc13

22

3

P37

P1416

Vss

29 P06

CNW

+5

C1 71 0 4

GNDGND

GND

GNDGND

GND

GND

GND

GND

GNDGND GND

P23 7

HSTP.0 R84 .7 K

R94 .7 K

D1 5 4 1 4 8 D1 2 4 1 4 8 D1 3 4 1 4 8

R6 2 2 0

R1 0 2 2 0

R1 1 2 2 0

+5

P02

P33

25

19

P1031

P0326

2

heat/cool

dhon/offHSTP.1

D7 4 1 4 8 D1 4 4 1 4 8 D9 4 1 4 8

TYPE1.0 /

/ TYPE1.1

P22

9

8

23

P25

P24

P00

P12 1

R2 4

3 9 0

IC 9

BC R

R2 5 3 3 0

R2 62 2 0

C1

4 7 3 /2 75 V

P32

20

L1

CFI

1 .2 uF

N

C21 0 4 /2 75 V U1

CNU

1

5

3

3

21

C1 0

1 0 2

GND

5 2 C-1 A

5 2 X6 A

COM

CN

COM

GND

H E A T

U1

/RESET11R3 3 5 1 0

GND

+5

GND

CS

1 2 3

4

5

6 7

8

AT 2 4 C0 2

R3 7 4 .7 K

R1 8 4 .7 K

GND

+5

+5

IC7

E5

4 7 uf/2 5V

0C314

IC1

IC3

1

2

4

6

IC 4

MC3 0 2 1

+5

DI

WR

+5

E1

1 0 0 uF/1 6 V

GND

12

4 .7 KR3 5

GND

P31

P3017

18

R3 4

2 K

24P01

GND

CNVSS

10 VRE F

ZR 6 2 1 -1 0-1 2 6

BZ

20 S

F M O

C1 81 0 2

GND

D8 4 1 4 8

R1 2

4 .7 K

+5

123456

CNE

XH-6A+5

GNDS

S

C1 9

1 0 4

R2 1

4 .3 K

R2 9 1 0 K

GNDGND

12

CN1

XH-2A

+5C23

104

GND

C12

102

C16

102C8

102

GND

6

C7

1 0 4

Q 3

9 0 1 2

R23

R36

R19

E 3

+5

1uf/50V

10K

10K

2K

E 2

C2 91 0 4

100F/25V

D1 1 4 1 4 8 D1 0 4 1 4 8

GND

C1 4

1 0 4

C1 1

1 0 2

10 0 R22

10 0 R5

CLK

DATA

QA QB QC QD QE QF QG

QH1 2 3 4 5 6 715

16VCC

GND

SCLR

10

S1

SCK

+5

IC2 M74HC595

C5

1 0 4

GND

G8

13

GNDRCK

R13

4.7K

Q29013GND

12

R7

4.7K

+5C27

471

C28

471

GND

27

28

P04

P05

12345

CNM

IN 11

IN 22

IN 33

IN 44

IN 55

IN 66

IN 77

COM8

CLAMP9

OUT 710

OUT 611

OUT 512

OUT 413

OUT 314

OUT 215

OUT 116

IC5

2003

C15

104

B

B

12345

CNM1

E 6

47UF/25V

B

GND

R1 5

1 0 K

+5

SW1

P1132

C2 2

1 0 2

GND

GND

R2 8

4 .7 K

11

14

GND

+5

P13

QA

QB

QC

QD

QE

QF

QG

0C314

JS2-B85aC-M01A/2

Q49013

D1 6

4 1 4 8

B

R38

4.7K

19

9. PCB function:

NOTE: Ts is the set temperature, Tr is indoor room temperature, TP1 is indoor coil pipe temperature, TP2 is outdoor

coil pipe temperature.

Display panel

[1]only two LED

running lamp(green)power on light, flash one time/ one second during anti cooled wind.

timer lamp(yellow)only light at timer state.

[2]eleven LED


temperature lamp(green)1631 set temp. and room temp. display, light is set temp. flash is set temp.

[3]two LED and two 8LED


timer lamp(yellow)only light at timer state.

8LED display set temp., also it can display timer time and failure code.

[4]LED multi-colour panel

according to display mode: dehumidification, cooling, ventilation, heating, auto, sleep, fan speed, swing, timer, indoor

fan running.

running timer

20

Cooling

Start up the compressor: when the room temperature is more than Ts+1, compressor start-up

Shut down the compressor: when the room temperature is less than or equal to the set temperature Ts-1,

compressor shutdown

When the temperature of coil pipe of the indoor units is less than or equal to 1 for one minute and the

compressor has continuous run for more than ten minutes, the compressor and outdoor blower fan shut down

through the electric control board and the indoor blower fan is running at low speed.

When the temperature of coil pipe of the indoor units is more than or equal to 7 and the compressor has

shutdown for more than three minutes, the compressor and outdoor blower fan start to run and the indoor blower

fan is running at set speed.

When the temperature of coil pipe of the indoor units is equal to or less than 10 for three minutes in the

compressor has continuous run for three minutes, the compressor, indoor and outdoor blower fans and swinging

wind shut down. Restart up six minutes later; if the above situations appear again within six minutes, all the

outputs are shut down through the electric control board and display failure.

When you press turbo button of remote, the air conditioner enter turbo running, compressor and outdoor blower

fan turn on all along, indoor blower fan run at high speed, turbo indication is light.

After the compressor runs five minutes, the lamp flashes 4 times per six seconds or display E4 if the temperature

of indoor coil pips is more than 25 in the continuous 20 minutes. The controller will automatically shut down if

the temperature of indoor coil pips is more than 25 in another continuous 20 minutes, that is the abnormality

protection of outdoor units and the indicator lamp keeps its former state of flashing. If the temperature of indoor

coil pips is less than 25 in the second 20 minutes or the compressor shuts down, the electric control board will

store to the normal display and the time is restarted when starting up the compressor next time.

21

1 C

7 C

Tr

-10 C

compr essor

out door

bl ower f an

door

bl ower f an

compr essor

door

bl ower f an

Tr

Heating (only applicable to heat pump units)

Start up the compressor: when the room temperature is less than Ts-1, compressor start-up

Shut down the compressor: when the room temperature is more than or equal to the set temperature Ts+3,

22

compressor shutdown

The electric heating start-up in the heating mode shall meet the following conditions: start up the compressor

and indoor blower fan none defrost TP1< 49 Tr 20.

The electric heating shutdown in the heating mode shall meet one of the following conditions: shutdown

indoor blower fan Tr 23 TP150.

In the heating mode, the indoor flower fan can be set as high/ medium/ low /automatic running mode by remote

control however the anti cool air function is prior. In the heating mode, the anti cool air control function is to

control shutdown of the indoor blower fan by detecting the temperature of coil pipe of evaporator so as to attain

the purpose of preventing cold air from blowing.

For the waste heat emission function in the heating mode, in principle, the indoor blower fan shall be on for

fifteen seconds after the electric heating is closed.

When the temperature of coil pipe of indoor units is more than or equal to 56, the outdoor blower fan shuts

down and it enters the overload protection; when the temperature of coil pipe of indoor units is less than or equal

to 52, the outdoor blower fan starts up and it exit the overload protection.

When the temperature of coil pipe of indoor units rises to 63, the compressor and outdoor blower fan are closed

and two minutes later, the change valve is closed. The indoor blower fan is running at the set speed. Restart up six

minutes later; if the above situations appear again within ten minutes, all the outputs are shut down through the

electric control board and display failure.

When you press turbo button of remote, the air conditioner enter turbo running, compressor ,outdoor blower fan

and four-way valve turn on all along, indoor blower fan run at high speed and it must meet start condition, turbo

indication is light.

After the compressor runs five minutes, the lamp flashes 4 times per six seconds or display E4 if the temperature

of indoor coil pips is less than 30 (heating) in the continuous 20 minutes. The controller will automatically shut

down if the temperature of indoor coil pips is less than 30 in another continuous 20 minutes, that is the

abnormality protection of outdoor units and the indicator lamp keeps its former state of flashing.

23

+3

- 1

COMPRESSOR st ar t - up st ar t - up

out door

bl ower f anst ar t - up st ar t - up st ar t - up

st ar t - up

bl ower f anl ower

speed

l ow

speed

l ow

speedl ower

speed

l ow

speed

st ar t - up2 MIN 2 MINst ar t - up st ar t - up

over 6 MIN

four-way

valve

Tr

door

Tr

24

compr essor

door

bl ower f an

Tr

36

Defrost (only applicable to the heating mode)

1. the intelligent defrost

In the heating mode, the electric control board checks and compares the temperature of indoor room and indoor coil

pipe after the compressor works for a while; judge whether the outdoor heat exchanger part is frosted or not according to

conditions such as the change of indoor coil pipe temperature; if it is judged as frosted, it automatically enters defrosting

process. When defrosting, close the indoor and outdoor blower fan and four-way valve.

2. Outdoor PCB for defrost.

In the heating mode, the unit defrost by outdoor control board

unit start defrost shall all meet the following conditions

acompressor continuous running over 7 minutes

bdefrost relay shut off-5

ccompressor cumulate running time over 50 minutes.

first defrost interval time is 50 minutes, later defrost interval time decided by last defrost time.

Defrost time(minute) Next defrost interval time(minute)

15 30

10--15 40

7--10 60

3--7 70

25

3 80

2end defrost condition(meet one of follows)

adefrost time have fifteen minutes.

bdefrost relay turn on8

cpress ON/OFF key in defrost process.

3. Outdoor sensor for defrost

unit start defrost shall meet one of the following conditions

a. compressor cumulate running time over 30 minutes and it continuous running over 3 minutes, the

temperature of coil pipe of the outdoor units is equal to or less than 15 for one minutes (Tp2-15).

b. compressor cumulate running time over 40 minutes and it continuous running over 3 minutes, the

temperature of coil pipe of the outdoor units is equal to or less than 5 for one minutes (Tp2-15).

c. Air conditioner first power on or it wait over 30 minutes ,the temperature of coil pipe of the outdoor units is

equal to or less than 2 (Tp2-15)

end defrost condition(meet one of follows)

a. the temperature of coil pipe of the outdoor units is more than 15 (Tp2-15).

b. defrost time have fifteen minutes.

compr essor

out door

bl ower f an

door

bl ower f an

TP2

Tr

26

compr essor

out door

bl ower f an

door

bl ower f an

TP2

Tr

Tr

compr essor

out door

bl ower f an

door

bl ower f an

TP2

27

out door

bl ower f an

door

bl ower f an

TP2

defrost time over 15 MIN or TP2 >15 C

Tr

compr essor

Sequence chart in defrosting mode

end def r ost

st ar t - up shut down st ar t - up shut down st ar t - up

st ar t - upst ar t - up shut down

def r ost

our - way val ve

door

bl ower f an

st ar t - upst ar t - up

st ar t - up st ar t - up

shut down

shut down

out door

bl ower f an

compr essor

st ar t def r ost

Dehumidification

Dehumidification running is to eliminate the water vapor in the air by using the cool circulating capacity, but the

dehumidification will not decrease the indoor temperature in great deal. The air conditioner automatically repeats on

and off circulation according the room temperature, which is shown in the following figure.

28

i ndoor

bl ower f an

C

C

door

bl ower f an

Tr

shut down shut downshut down shut down shut down

shut downshut downshut downshut downshut down

l ow speed

Tr 10

shut down

st ar t - up




st ar t - up

f or bi d

dehumi di f y

In the dehumidification mode, the indoor fan is running at the low speed for twenty seconds at first, then it select

working mode.

Ventilation working mode (only applicable to single cooling unit)

In the ventilation mode.When ventilating, the compressor, outdoor blower fan, four-way valve and electric heating are

all closed and the indoor blower fan is running at the set speed.

compr essor

out door bl ower f an

door

bl ower f an

Tr

Automatic mode

Conditions for entering the automatic running mode are: After power-up for the first time, start up and select the

automatic operating mode of remote or press emergency key, the working mode depends on Tr and if the working

29

mode had set , it doesnt change by Tr and the default set temperature is 25 .

25

Tr

21

26 C

mode

Time on and time off

When the time on or time off is used, the clock of remote controller shall be corresponding to the current clock and the

timing times is less than or equal to 24 hours, when the timing time is reached, unit will start-up or shutdown.

Sleep function When the sleep key is press, air conditionerenter sleep state, indoorblower fan running at low speed, only sleep

indication display.

Emergency key function

There is a forcible execution key on the panel of indoor units and the air conditioner can run by pressing the key when

the remote control is out of work or missing.

When pressing down the forcible execution key, then power up and enter the self-check program.

Failure display

LED lamp display

failure The reason of fault and solution

code explain code explain

DF display at flicker 1/1 defrost Normal, the defrost state is removed, it will return to

normal condition automatically

30

on state SEC indication

display at

off state

flicker 1/3

SEC

anti cold wind

1 Normal (during heating mode )

2It will be removed when the coil pipe temperature

sensor reaches certain temperature.

E2

display at

off state

flicker 1/1

SEC

display at

on/off

state

room temp.

sensor fault

1Check whether the resistance of the sensor is normal

(the resistance is 5 in the normal temperature

25), when it is abnormal the sensor should be

replaced.

2Check whether there is short circuit or open circuit in

the wire of the sensor, and whether the plug is

connected well, whether there is welding off or

rosin joint on the electric control board, if there is

any, it should be repaired.

3When the 1 and 2 are both normal, then the

components or integrated circuit is damaged, the

electric control board should be replaced.

E3

display at

off state

flicker 3/5

SEC

display at

on/off

state

coil temp.

sensor fault

1Check whether the resistance of the sensor is normal

(the resistance is 5 in the normal temperature

25), when it is abnormal the sensor should be

replaced.

2Check whether there is short circuit or open circuit in

the wire of the sensor, and whether the plug is

connected well, whether there is welding off or

rosin joint on the electric control board, if there is

any, it should be repaired.

3When the 1 and 2 are both normal, then the

components or integrated circuit is damaged, the

electric control board should be replaced.

E4

display at

on/off state

flicker 4/6

SEC

display at

off state

outdoor unit

abnormal

1 Check whether the winding resistance and

operation current of the compressor are normal.

2Check whether the high and low pressure is normal

when the unit is running.

3Check (whether the coil pipe sensor is normal)

whether the contact of the inserter on the circuit

board is well, the coil pipe temperature sensor is

fixed, the evaporation of the indoor unit is well,

31

the key is to check the evaporator temperature

detected by the coil pipe temperature sensor has

reached the cooling or heating temperature.

4Check whether the surface of the condenser is too

dirty, it should be cleaned when it is too dirty.

5Check whether the capacitance of the outdoor motor

and the fan is damaged, it should be replaced when

it is damaged.

6If the above items are normal, the electric control

board should be replaced.

E5

PG motor

display at

off state

flicker 5/7

SEC

display at

off state

no feedback

signal of indoor

fan

1Check whether two sets of plugs on the outlet end of

the motor have loosed from the socket of the

electric control board, insert it firmly when loosing.

2Check whether the indoor motor has damaged, the

motor should be replaced when it is damaged

3 Check whether the controllable silicon and other

components on the electric control board have

damaged, replace the controllable silicon or electric

control board when they are damaged.

E6

PG motor

display at

off state

flicker 6/8

SEC

display at

off state

no over zero

signal

1Firstly check whether the indoor fan is normal.

2Check whether the signal outputting from the

integrated chip of the electric control board is

normal, the electric control board should be

replaced when the signal is abnormal.

E7

display at

off state

flicker 7/9

SEC

display at

off state

outdoor

feedback fault

1Check whether the winding resistance and operation

current of the compressor are normal

2Check whether the high and low pressure is normal

when the unit is running.

3Check whether the indoor and outdoor wiring is

right; when it is wrong, connect them again

according to the circuit diagram

4 Check whether the contact of the inserter on the

circuit board and the connection are well, otherwise

repair.

5Check whether the signal feedback wire is

32

disconnected, replace or connect the feedback

signal wire.

6Check whether the supply power is phase-lacking or

phase opposition.

7Check whether the AC electromagnetic contactor is

well.

E8

display at

off state

flicker 8/10

SEC

display at

off state

frost

protection/over

heat protection

1Check whether the filter of the indoor unit is dirty or

blocked, and clean if it is dirty.

2Check whether the indoor fan is running normally,

and replace the motor if it is abnormal.

3Check whether indoor pipe temperature sensor is

normal, and replace the sensor if it is abnormal.

4Check whether the system pressure is normal, if

abnormal, should check whether there is leakage,

and fill the refrigerant again.

33

10. TROUBLE SHOOTING

Is CN (Tr sensor connector)

connected properly?

Is Tr sensor resistance value

(5KO at 25? ) normal?

Indoor P. C. board is defective. Replace P. C. board.

Connect CN properly.

Replace TA sensor.

Is CN (TP1 sensor connector)

connected properly?

Is TP1 sensor resistance value

(5KO at 25? ) normal?

Indoor P. C. board is defective. Replace P. C. board.

Connect CN properly.

Replace TC sensor.

YES

YES

YES

YES

NO

NO

NO

NO

Indoor Tr sensor

error

Indoor TP1 sensor

error

34

Turn off power

supply once, and

turn it on again.

Does

compressor

continue to

operate?

Start to operate indoor

unit in cooling

operation at airflow

level LOW ,wait

three minutes..

Does indoor

fan operate?

Fan motor

operates

normally.

Is it possible to detect AC

220V between

pin(high/middle/low) and

pin(common) of motor

connector .

Replace indoor

fan motor.

Replace main

P.C. board.

Replace

bearing.

YES

YES

YES

NO

NO

NO

Turn off indoor unit and rotate

cross-flow fan by hand when the

unit is on standby.Is it possible to

rotate cross-flow fan by hand

properly?

Only indoor fan motor does not operate.

Is capacitor of indoor fan ok?

YES

NO

YES

Replace

capacitor

NO

(1) Is it possible to detect the power supply voltage (200-240V) between L and N on the terminal

block?

(2) Does the indoor fan motor operate in cooling operation?

35

Compressor does not operate.

Turn on power supply.

Does compressor delay

three minutes by

temperature changes or

others?

Does OPERATION

indication indicate?

Is it possible to detect AC

220-240V on terminal

block or contactor of

compressor?

Are all of compressor

cords normal?

Is compressor motor

winding normal?(Check

winding resistor.)

Is capacitor for

compressor normal?

Is overload relay normal?

Does compressor start?

Does compressor stop

after a while?

Is gas quantity normal?

(Check gas pressure.)

Microcontroller is defective or

miniature relay is defective..

Is resistance value of room

sensor (Tr) and heat exchanger

sensor (TP1) normal?

Room sensor or heat

exchanger sensor is

defective.

Replace room sensor

or heat exchanger

sensor.

Compressor is defective.

Capacitor is defective.

Overload relay is defective.


Gas shortage (Gas leak)


Replace P.C. board.

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload

relay.

Supply gas.

Replace compressor.

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO NO

NO

NO

NO

NO

NO

NO

NO

Check power supply.

Replace compressor.

Wait three minutes

(1) Is the room temperature higher than the preset temperature in cooling operation?

(2) Is the crossover cable connected properly?

36

Replace

P.C. board.

Is receiver on

indoor unit exposed

to direct sunlight?

Batteries are

exhausted.

Press START/STOP

button.

Is there any thyristor

fluorescent light

nearby?

Does indoor unit

operate when

moving remote

control near receiver

or indoor unit?

P.C. board is

defective.

Is transmission

mark indicated?

Press RST button

on remote control

with tip of pencil.

Press START/STOP

button.

Does radio sound is

affected by remote

control when a

signal is transmitted

at distance of 5 cm

from radio?

Does indoor unit

start to operate by

automatic restart

function?

Is transmission

mark indicated?

Does indoor unit

beep and operate?

Remote control is

defective.

Keep indoor unit

away from

thyristor

fluorescent light.

Avoid direct

sunlight.

Replace

batteries.

Normal

operation

Replace remote

control.

The unit does not beep at all.

OPERATION indication on

indoor unit is not indicated.

NONO

NONO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

NO

YES

YES

37

Trouble

Is the power

applied to the unit?

Check power supply mains or

interconnection wires

Is the power normal? check

the voltage between L&N of

terminal block

Check the wiring of indoor and

outdoor

Press the power ON/OFF button

of wire control or remote control

YES

YES

NO

NO

Does the beeper

beep?

Is the display all

off?

Check the connector on display

PCB connected to control PCB

Check the display PCB itself

Is the unit display

normal?

Does outdoor unit run?

Does the

compressor run

normally?

Check the failure code

according to the failure

table

Normal

Check the

compressor ,wires

and it s

capacitor.

YES

YES

YES

YES

YES

YES

NO

NO

NO

Does the control

ok?

Does the control

PCB ok?

Control failure

Control PCB failure

NO

NO

YES

NO

Trouble shooting

NO

Does the indoor

unit run?

38

Indoor unit and outdoor unit don t operate

Indoor and outdoor unit

don t operate

Press emergency key, does

the air conditioner

running?

Replace fuse of

indoor PCB.

YES

YES

YES

NO

NO

NO

NO

Make the power

supply ok.

Replace remote

control.

YES

NO

Replace remote

receiver or display

panel.

NO

YES

YES

Replace transformer.Does the transformer has

output?

Does the fuse of indoor

PCB burn out?

Change a good remote,

does the air conditioner

running?

Is the power supply no

problem?

Does the 12V and 5V of

indoor PCB have?Replace PCB.

normal

Does the electric switch

cut off?

Does the electric switch

cut off after a few

nimutes?

Is the wires of indoor

unit and outdoor unit no

problem?

YES

Reconnect the wires.NO

Is the insulation of

indoor unit and outdoor

unit no problem?

YES

Find the reason and

replace the failure

componet.

NO

Is the resistance of each

main component no

problem?

Rreplace the failure

componet.

NO

YES

YES

YES

air con service manual

Documents

electric shock

service unit

indoor unit model

kernel of indoor unit

body pit code

body indoor machineor

authorized service center

attention of installation