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)


Power supply connecting

RS485 A RS485 B

Working indicator


RS485 A RS485 B

5


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.


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


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


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.

7


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.


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


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.


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:

9


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.

10

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


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

11


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

12

3.3 Installation and Selection of Air cooled screw (heat pump) chiller



Scope of Supply Type Selection Remarks




S

O

P

P


Types

All type


Modules

Optoelectronic isolated converter


Repeater

One unit equipped with a communication module

ZJ522



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:


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


O

One every 800m of communication distance equipped with one and One every 30 communication modules equipped with one.


13




Cable Description


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


14

3.4 Installation and Selection of Water cooled screw chiller



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




S

S

O

P

P


Types

All type


Modules


Repeater



One every 30 communication modules equipped with one


Qty set 5(LSBLG290H)

Communication module

Optoelectronic Isolated Converter

5 (ZJ203)

1


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:


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

15



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

...

...


Cable Description


Both crystal head


9-core head and the other end is crystal head(Standard parts)

D1

D2

D3

H1


16

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)





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.


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 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:


Water cooled centrifugal chiller Long-distance

Monitoring System FC30-23/A(M)

Qty(set) 3(LSBLX2000-M)

1

Communication module 3(ZJ9012)

Repeater 1



17


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


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



Cable Description

Both 9-core head (Standard parts)


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.

17


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


485A

line

485B

line

485B line

485A line


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-.

18

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

19


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.

bms compact

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