Download - BMS Compact
1. SUMMARY 2
2. HARDWARE AND SOFTWARE 3
4. TROUBLESHOOTING 18
3. INSTALLATION AND SELECTION 9
1 SUMMARY
1.1 Introduction to BMS interface of Gree Central AC
BMS interface of Gree Central AC is only for Gree central AC devices. There is BMS interface or multifunctional gateway in the hardware and standard communication protocol and BMS software plug-in in the software. Gree central AC can be centrally monitored and managed through BMS interface together with other devices in the building.
Gree Central AC BMS interface technical sales guide
1.2 Types of Products
According to different types of products with different applications.
Types Scope Description
GMV Multi-variable Units
Water cooled screw chiller
Air cooled screw (heat pump) chiller
Water cooled centrifugal chiller
GREE will supply the BMS interface port with Modbus protocol for the Air Conditioners only, user needs to integrate the whole BMS system by himself.
BMS interface of Gree Central AC
1.3 Features of Products
Universal modbus protocolPopular RS485 interfaceExpedient Installation of ProjectPivotal device of intelligent building
2 HARDWARE AND SOFTWARE
2.1 Introduction to Main Devices
2.1.1 R232-R485 Optoelectronic Isolated Converter (optional parts)
RS485 A RS485 B
Connecting terminal 485
Working indicator
Male connector DB9connected
with RS232 COM of BMSPower supply connecting terminal
Function Introduction:
R232-R485 optoelectronic Isolated converter is used to convert the signal 232 of BMS COM and
signal of bus 485
Dimension.
4
Description L mm W mm H mm
Optoelectronic isolated converter 94 72 23
Installation Dimension
87.5mm
72mm
25 mm9 mm
Dimension:
It must be installed indoors to avoid knock, insolation or rainwater and is better to be put in the
monitoring room.This device must be the original one in the factory. Never self-buy the models for replacement.220-V AC socket must be installed for independent power supply.Power supply specification: 12 30VDC 800mA
Installation Criteria:
2.1.2 Optoelectronic Isolated Repeater(optional parts)
Connecting terminal 485
Power supply connecting
RS485 A RS485 B
Working indicator
Connecting terminal 485
RS485 A RS485 B
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Gree Central AC BMS interface technical sales guide
Function Introduction: Optoelectronic Isolated repeater is mainly used to collect increase of communication distance and nodes when the quantity of communication modules is above 30 or communication distance is above 800m.Refer to Project and Installation section for details.Dimension.
Description L mm W mm H mm
Optoelectronic isolated converter 94 72 23
Installation Dimension
87.5mm72mm
25 mm9 mm
It must be installed indoors to avoid knock, insolation or rainwater and is better to be put in
centralized control cabinetThis device must be the original one in the factory. Never self-buy the models for replacement.220-V AC socket must be installed for independent power supply.12 30VDC 800mA Power supply specification: 12 30VDC 800mA
Installation Criteria:
2.1.3 Communication Module (standard parts)
Power indicator (red) will lightafter electrifying
Communication indicator(green) will light duringcommunication
ON/OFF button, ineffectivebriefly, is reserved.
Function IntroductionCommunication module is used for conversion and transfer of signal of BMS and air conditioner during the communication of them, making the role of communication controller. Refer to User Instruction to Communication Module for details.
6
Description L mm W mm H mm
Communication module 150 102 30
Dimension:
Description
Hanging Hole 35 5
Distance to top side mm Diameter mm
Use Instruction to Communication ModuleThe Sketch Map of COM, as shown below:
Installation Dimension:
Power COM1 COM2 COM2
With BMS or othercommunication modules
With air conditioner
Use Instruction
Please check the user manual of communication module for details information.
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Gree Central AC BMS interface technical sales guide
Ensure the specification of power adapter to avoid malfunction or damage to the communication
module.Ensure unique DIP address of each communication module in the project to avoid malfunction.Ensure communication cable connects with correct COM to avoid malfunction.The communication modules should be put in centralized control cabinet together to avoid direct
sunlight or high temperature and wet environment.Power transformer specification: input AC200V 50HZ and output DC9V 800mA
Installation Criteria of Communication Module:
2.1.4 Centralized Control Cabinet (user provided parts)
Communication Module
Power Socket
Repeater
Cabinet
Function Instruction:
It can put the communication modules together for convenient centralized management and reliable
operation.
Dimension:
The following dimension is for reference. The cabinet is designed according to 10 communication
modules into. If more modules are needed, the cabinet should be designed once again. The internal
structure should accord to actual state.
The external dimension of the cabinet (Unit: mm)
8
The dimension of the cabinet should be designed according to quantity, arrangement and put
position of the communication modules before make of it.Independent power supply for each communication module is needed, so enough 220v AC sockets
should be installed in the cabinet.The communication cable and heavy-current wire should be separated for the distance above 15cm.The cabinet should be put indoors and locked to avoid insolation and rainwater or contact of non-
manager.
Installation Criteria:
2.1.5 3-way Phone Connector(user provided parts)
Lines without 3-way telephone connector can be connected by welding and protected with insulating
tape to avoid oxidization and short circuit.
Note:
Crystal head port
Crystal head port
Crystal head port
Function Instruction: Common 3-way phone connector is applied to connect 3 pieces of communic
-ation cable.Dimension
Description L mm W mm H mm
3-way connector 33 27 21
Avoid knock, insolation or rainwater.
Ensure tightness of each bayonet without load.
Perform conduction test after installation. Replace the ones of poor contact.
The welding method is better than 3-way connector.
After the connection of communication cables with 3-way connector, it must be fixed by insulating
tape to avoid loose and poor contact of crystal head.
Installation Criteria:
2.2 Instruction to Application of Software
A long distance monitoring system software with BMS protocol could be provided by GREE (optional by
user),to check whether the Air conditioners have been connected with the BMS system correctly.for user to control the air conditioners separately in long distance.
Please check help document for details information of how to use this software.
Remarks:
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Gree Central AC BMS interface technical sales guide
3 INSTALLATION AND SELECTION
3.1 Notice
The air conditioners could be connected with the BMS system with every different model, or several
models together, below wiring diagram shows the connection way of single unit, just for easy
drawing.
The address code of the communication modules should not be conflicted in one project.
Optoelectronic Isolated Repeater :One every 800m of communication distance equipped with one
and One every 30 communication modules equipped with one.
the communication cable and heavy-current wire should be separated and the distance between
them can not be below 15cmline A and line B of Bus 485 should respectively correspond with line A and line B.crystal head crystal head buckle is downwards
4-core crystal phone plug
485 A line
485 B line
Crystal phone plug
Scope of Supply Type Selection
File of protocolModbus protocol is used for user to integrate with BMS system.
Remarks
Communication module
ME30-23/E(M)
GMV long distance monitoring software FE30-20/A(M)
optoelectronic isolated converter Rs232- Rs485
Including communication module ZJ6012, power transformer and connecting wire between module
Including CD and optoelectronic isolated converter Rs232- Rs485
It is needed when the interface protocol of BMS system is Rs232
4-core twisted pair wire
3-way phone connector
S
O
P
P
Optoelectronic isolated repeater Rs485
S
O
O
One every 800m of communication distance equipped with one and One every 30 communication modules equipped with one.
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3.2 Installation and Selection of GMV Multi-variable Units
3.2.1 Scope of Supply
S=Standard parts; O= User Optional; P= User Provided Parts
3.2.2 Confirmation of Quantity of Parts
Types
Digitalmulti-variableunits (capacity of or below 300)
Qty of Communication
Modules
Optoelectronicisolated converter
Optoelectronic Isolated
RepeaterQty of Pinboards
Unnecessary
One outdoor unit equipped with a communication module ZJ6012 which can connect with indoor units up to 16 sets
One if BMS COM is Rs232
One every 800m of communication distance equipped with one.
One every 30 communication modules equipped with one
Digitalmulti-variableunits (capacity of or above 300)
It may be used for 1-to-32 or 1-to -64 units, about which refer to Model Selectionsection.
One pinboard equipped with a coomunication module ZJ6012
One if BMS COM is Rs232 One every 30
communication modules equipped with one
One every 800m of communication distance equipped with one.
Project Requirements
Quantity
Qty set 35
Communication module ME30-23/E(M)
Repeater
35
2
3.2.3 Selection Example
BMS COM is RS485, Converter is Unnecessary. 35 sets of outdoor units GMV-R300W4/A with 300 sets of indoor
units, 35 communication modules are needed, the communication distance is above 800m one repeater is
necessary and the quantity of communication modules is above 30 one repeater is necessary too, as follow:
Outdoor unit Indoor unit
GMV-R300W4/A 2 R410A four-in-one units
300
Optoelectronic Isolated Converter 0
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Gree Central AC BMS interface technical sales guide
3.2.4 Wiring Diagram
RS232-485
Converter
ODU
IDU
ODU
IDU
...
...
...
...
...
D1
COM2
...
ZJ60121
3-wayconnector or
welding
...
Network 1
...
...
...
...
Network n
3-wayconnector or
welding
D1 D1 D1
D2 D2 D2
COM2
COM1
D2 D2
COM2
COM1
COM2
COM2
COM1
D2 D2
ZJ60122 ZJ6012n
3-wayconnector or
welding
3-wayconnector or
welding
ODU ODU
IDU IDU
D1 D1D1 D1
COM2COM2 D2 D2 D2
D2 D2 D2 D2 D3
ZJ6012m ZJ6012m+1 ZJ6012254
R-/D---Rs485BR+/D+---Rs485A
BMS
Just for Rs232interface of BMS
Description of above communication cables
Cable Description
Crystal head and the other end is XH 4-core pin connector
Both crystal head
Crystal head and the other end connects of it connects with wiring terminal of converter.
D1
D2
D3
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3.3 Installation and Selection of Air cooled screw (heat pump) chiller
3.3.1 Scope of Supply
S=Standard parts; O= User Optional; P= User Provided Parts
Scope of Supply Type Selection Remarks
optoelectronic isolated converter Rs232- Rs485
4-core twisted pair wire
3-way phone connector
S
O
P
P
3.3.2 Confirmation of Quantity of Parts
Types
All type
Qty of Communication
Modules
Optoelectronic isolated converter
Optoelectronic Isolated
Repeater
One unit equipped with a communication module
ZJ522
One if BMS COM is Rs232
One every 800m of communication distance equipped with one.
One every 30 communication modules equipped with one.
Project Requirements Quantity
Qty set 3(LSBLGRF250M)
Communication module setFE30-22/E
Repeater
3
1
BMS COM is RS232,one converter is needed.3 sets of units LSBLGRF250M, 3 communication
modules are needed, the communication distance is above 800m and one repeater is necessary and
the quantity of communication modules is below 30 repeater is unnecessary, as follow:
Optoelectronic Isolated Converter 1
File of protocol SModbus protocol is used for user to integrate with BMS system.
Communication module FE30-22/E
Including communication module ZJ522, power transformer and connecting wire
Long distance monitoring set FE30-22A(M)
Including CD and optoelectronic isolated converter Rs232- Rs485
O
It is needed when the interface protocol of BMS system is Rs232
Optoelectronic isolated repeater Rs485
O
One every 800m of communication distance equipped with one and One every 30 communication modules equipped with one.
3.3.3 Selection Example
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Gree Central AC BMS interface technical sales guide
3.3.4 Wiring Diagram
Description of above communication cables
Cable Description
Crystal head and the other end is XH 4-core pin connector
both crystal head(Standard parts)
crystal head and the other end connects of it connects with wiring terminal of converter.
D1
D2
D3
...
...D1
D2
...
... ...
Displayer n
...
...D1
COM1COM2
COM2
Unit Module1
...
...
Network 1
...
...
Network n
...
ZJ5221
D2
R-/D---Rs485B
Unit Module8 Unit Module1 Unit Module8
COM2 D1
D2 D2 COM2D1
ZJ5222 ZJ522n
D2
Unit Module1 Unit Module8 Unit Module1 Unit Module8
...
Displayer 1
Displayer 254Displayer m
ZJ522m ZJ522 254ZJ522m+1
COM2D2 D1 D2 D2 D1
R+/D+---Rs485A
D3
RS232-485
Converter
BMS
Just for Rs232interface of BMS
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3.4 Installation and Selection of Water cooled screw chiller
3.4.1 Scope of Supply
S=Standard parts; O= User Optional; P= User Provided Parts
Scope of Supply Type Selection
File of protocol
Remarks
ZJ203 Communication module
ZJ204 Communication module
Long distance monitoring set FE30-18/A(M)
Including communication module ZJ203, power
transformer and connecting wire
Including communication module ZJ204, power
transformer and connecting wire
Including CD and optoelectronic isolated converter
Rs232- RS485 and connecting wire
It is needed when the interface protocol of BMS system
is Rs232
optoelectronic isolated converter Rs232- Rs485
4-core twisted pair wire
3-way phone connector
S
S
O
P
P
3.4.2 Confirmation of Quantity of Parts
Types
All type
Qty of Communication
Modules
Optoelectronic Isolated
Repeater
One if BMS COM is Rs232
One every 800m of communication distance equipped with one.
One every 30 communication modules equipped with one
Project Requirements Quantity
Qty set 5(LSBLG290H)
Communication module
Optoelectronic Isolated Converter
5 (ZJ203)
1
3.4.3 Selection Example
BMS COM is RS232 ,one converter is needed.5 sets of units LSBLG290H, 5 communication modules ZJ203 are
needed, 1 communication modules ZJ204 are needed. the communication distance is above 800m and one
repeater is necessary and the quantity of communication modules is below 30 repeater is unnecessary, as follow:
Optoelectronic isolated repeater Rs485
Modbus protocol is used for user to integrate with
BMS system.
One every 800m of communication distance equippedwith one and One every 30 communication modules equipped with one.
S
O
O
Optoelectronic isolatedconverter
One unit equipped with acommunication module ZJ203
One Project equipped with a communication module ZJ204
1 (ZJ204)
Repeater 1
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Gree Central AC BMS interface technical sales guide
3.4.4 Wiring Diagram
D3
D2
D2
D2
COM2
COM2
COM2
Network 254
Touch Displayer
H1
ZJ203 254 ZJ204
COM1
COM2
D2
COM1
COM1
Unit 254
R+/D+--Rs485 A
R-/D- --Rs485 B
COM2
COM2
BMS
RS232-485
Converter
Network 2
Displayer
D1
ZJ203 2
Unit 2
Network1
Touch Displayer
H1
ZJ203 1
Unit 1
...
...
Description of above communication cables
Cable Description
Crystal head and the other end is XH 4-core pin connector
Both crystal head
Crystal head and the other end connects of it connects with wiring terminal of converter.
9-core head and the other end is crystal head(Standard parts)
D1
D2
D3
H1
Just for Rs232interface of BMS
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3.5 Installation and Selection of Water cooled centrifugal chiller
Scope of Supply Type Selection Remarks
PC
Communication module set ME30-27/E(M)
Water cooled centrifugal chiller Long-distance Monitoring System set FC30-23/A(M)
Optoelectronic isolated repeater Rs485
4-core twisted pair wire
3-way phone connector
S=Standard parts; O= User Optional; P= User Provided Parts
P
Including communication module ZJ9012,power transformer and connecting wire
S
S
O
P
P
Including CD and optoelectronic isolatedconverter RS232- RS485
One every 800m of communicationdistance equipped with one and One every30 communi cation modules equipped withone.
3.5.2 Scope of Supply
TypesQty of Communication
Modules
Long-distance
Monitoring System
Optoelectronic
Isolated Repeater
One every 800m ofcommunication distanceequipped with one.
One every 30 communication
modules equipped with one
Water cooled centrifugal
chiller Long-distance
Monitoring System set
FC30-23/A(M)
One unit equipped
with a communica
tion module ZJ9012
All types
3.5.3 Selection Example
3 sets of units LSBLX2000-M, 3 communication modules are needed, the communication distance is above
800m and one repeater is necessary and the quantity of communication modules is below 30 repeater is
unnecessary, as follow:
Project Requirements Quantity
Water cooled centrifugal chiller Long-distance
Monitoring System FC30-23/A(M)
Qty(set) 3(LSBLX2000-M)
1
Communication module 3(ZJ9012)
Repeater 1
Optoelectronic Isolated Converter 1
3.5.1 Scope of Supply
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Gree Central AC BMS interface technical sales guide
D3
D2
D2
D2
COM2
COM2
COM2
Network 254
Touch Displayer
H1
ZJ9012 254
Unit 254
COM2
COM2
Network 2
Displayer
H2
ZJ90122
Unit 2
Network1
Touch Displayer
H2
ZJ90121
Unit 1
...
...
DB9 COM
DB9 COM
DB9 COM
DB9 COM
3.5.4 Wiring Diagram
The connection way of the whole system
The connection way in the electrical cabinet
Unit cabinet
ZJ9012
COM2
COM2
Db9COM
Db9COM
H2
Electrical outlet
To BMS(Just for the ZJ9012which connet to BMS)
To other ZJ9012
R+/D+--Rs485AR-/D- --Rs485B
BMS
RS232-485Converter
Just for Rs232interface of BMS
Description of above communication cables
Cable Description
Both 9-core head (Standard parts)
Crystal head and the other end connects of it connects with wiring terminal of converter.
D2
D3
H2
16
Both crystal head
Installation references
3.6 Installation Criteria
3.6.1 Requirements to Devices
Communication Device
RS232 RS485 optoelectronic isolated converter An independent device used to convert the
signal of BMS COM into RS485 bus signal is provided by Gree.
RS232 RS485 optoelectronic isolated repeater An independent device used to increase the
communication length of RS485 bus and collect the nodes is provided by Gree.
Communication module: Exclusively developed by Gree, it is an independent device for control of
the communication between air conditioner and BMS. For the same project, the address of each
communication module must be unique and cannot be repeated. The addresses of some models of
communication modules have been written in the factory, so special software which can be got from
our factory must be used to change the address. The addresses of some ones can be set manually
according to the instruction.
3-way telephone connector: A device connects 3 ports of ordinary telephone line.
Note:
Lines without 3-way telephone connector can be connected by welding and protected with insulating
tape to avoid oxidization and short circuit.
Communication Cables
Twisted pair wire: 4-core Type-V twisted pair wire. If the cable end is of pin seat connection, it is XH
4-core pin head. If the pin head is crystal connector, 1-to-1 connection shall be adopted, with the two
cords in the middle formed into a pair of wires and other two wires formed into a pair of wires. In
order to ensure accuracy of installation, the wires should be purchased from our company according to
requirements. The wire is 300-m 4-core shielding twisted pair wire and its parts code is 40134620.
9-core communication wire: One end is female connector DB9 and the other end is male connector
Db9.
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Gree Central AC BMS interface technical sales guide
3.6.2 Installation Method of Device
Installation of Communication Cable
Ensure that each communication cable has proper conductivity and must pass the special
conductivity test.
Communication signal cable shall not be put in the same slot with other high-voltage electrical
cable or high-frequency signal cable, nor shall it be bundled with similar signal cables generating
strong interference. According to experiences, this communication cable shall be maintained at least
15cm away from the high-voltage electrical cable. The minimum distance from other high-frequency
signal cables shall be calculated according to the frequency and voltage of the signal.
In event that there is not other cabling options and it has to be in parallel with such signal cables of
strong interference, the construction side must be required to add shielding steel pipe.
The communication cable is required to run along the refrigerant pipeline in special cable slot.
The crystal head if needed should be made after the communication cable through the pipes. But it is
needed to pass the pipe with the communication cable, it must be protected well.
The position of communication cable is as follow (crystal head buckle is downwards): remove a
certain length of insulating sheath of communication cable and then cut and make the terminal of it
uniform (note: don't remove the skin of it).At last, insert the signal line A and signal line B of 4-core in
2-core twisted pair communication cable into the middle cores of 4-core crystal head to make crystal
head.
Connection Method of Phone Connector
Notice Lines without 3-way telephone connector can be connected by welding and protected with
insulating tape to avoid oxidization and short circuit.
485B line
3-way phone connector (provided by user)
Inserting Direction of Crystal Phone
Connector (All 3 crystal heads are clamped
Downward).
485A line
4-core crystal phone plug
485A
line
485B
line
485B line
485A line
4-core crystal phone plug
485 A line
485 B line
Crystal phone plug
Connection of Communication Module Connecting Cable: cut off the communication cable
between outdoor unit and indoor unit and then connect the communication cable among outdoor unit,
indoor unit and communication module with a 3-way phone connector.
Refer to 5) about connection between communication cable and optoelectronic isolated converter.
Connection of Communication Cable
It is best that the twisted pair wire for communication is a complete cable. To connect under special
occasions, be sure to connect correctly. Take special care on the direction of communication line A & B
or the correct connecting of the communication cable. The connecting procedures are as below:
Properly connect the copper core of corresponding twisted pair wire. Then, fix the connecting
portion by soldering. To avoid oxidization, remember to protect the connecting portion with insulating
adhesive or insulating sheath.
Installation of Centralized Control Cabinet
The make and place of cabinet should be according to quantity of communication modules and
their arrangement.
Each communication module needs independent power supply and 220-v AC socket must be
installed in the cabinet to provide power.
The control cabinet should be placed in the room to avoid insolation and rain.
The control cabinet should be equipped with lock to prevent contact with non-managers.
Installation of Centralized Control Cabinet
or every project, the address of communication module is unique and its range is 0 254 so never
exceed his range or repeat the addresses.
Differentiate all the COM on the communication module.
Each communication module must connect with independent power supply.
Installation of Optoelectronic isolated Converter
One end of DB9 connects with DB9 joint of optoelectronic isolated converter and the other end of it
with RS232 COM of BMS, and then power on.
Adjust the DIP switch 1 and 2 of optoelectronic isolated converter at OFF position.
Connect the A end of communication cable with R+/D+ and B end with R-/D-.
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4 TROUBLESHOOTING
If malfunction happens during debugging or usage of the system, the following causes should be
considered firstly:
Malfunction Possible Causes Troubleshooting
Some communication cables are not twisted pair wires
Replace them
The crystal head of communication cable between outdoor unit and communication module is not well
Make crystal head again
The 3-way phone connector is broken Replace it or directly weld it
The communication cable betweenindoor unit and outdoor unit is cut-off
Weld the cut-off cable
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Gree Central AC BMS interface technical sales guide
Malfunction Possible Causes Troubleshooting
The long-distance monitoring comm-unication cable is cut-off
Weld the cut-off cable
The circlip in the crystal head can not act or it is pushed to the end so that it can not contact with the crystal head
Repair the crystal head or replace it
The crystal head can connect with 4 pieces of wires ,but 2 of which are not used
Exchange them
The communication cable short-circuits
Repair the short circuit part
The distance between twisted pair wire and power cord is below 15cm so that communication malfunction will result.
Separate them above 15cm or add shielding steel pipe
The connection of COM is incorrect Connect it according to this manual
There is malfunction alarm on the BMS, but the running state of some or all of the units can not be displayed and the units can not be controlled.
The circuit is normal, but there is no display of information to some or all of the units and communication malfunction also happens.
The Unit is not re-electrified after power failure after replace of chip or re-dialing of codes.
The COM used by the communicationsoftware does not accord with the COM of BMS.
The addresses added in the software do not accord with actual addresses.
Re-electrify the unit.
Replace COM or change the COM setting of software.
Modify the address setting of software
The unit is not electrified.
The chip is not inserted in the unit or it is inserted at the opposite direction.
The address of communication module is incorrect or repeated.
Modify the incorrect address setting (connect the possible incorrect commun-ication module with normal COM)
Re-check the chip and insert the chip according to open direction of PCB.
Electrify the unit.
The circuit and other floors of devices are normal, but there is no display of information for one floor of devices .
No display of information to allthe units, there is communicationmalfunction indicator andTX light of converter is alwayson (not blinks)
Installation of circuit, device and project is normal but there also is communicationmalfunction to the software
Repeater should be installed or it isincorrectly installed.
The communication A and B are oppositely or incorrectly connected.
The displayer, controller or commu-nication module non-correspondingwith actual units is used
Correctly install the reperater
Check the circuit and make the line A to A and B to B.
Check models of them, if not, replace them.