84
DC Inverter Multi
VRF Service Manual
CONTROL
7.2.2 Function Instruction of BMS System
Realize the perfect connection with other network by connecting the RS485 main interface to the user’s BMS
system under the involvement of the Modbus protocol.
Realize the monitoring on the settable parameter of the unit.
Realize the monitoring on the running status of the unit.
Realize the monitoring on the error status of the unit.
Be of multiple monitoring points, allowing up to 255 units in one network.
7.2.3 Product Accessories List
Notes: When Gree provides BMS interface module only, so that the user needs to integrate the building
management system (BMS) by himself according to interface protocol�
Name
Model
Material Code
Range of Supply
Remarks
Optoelectronic
isolated converter
Optoelectronic isolated
converter GD02
EN02200020
Optional
For export
Optoelectronic
isolated repeater
Optoelectronic isolated
repeater RS485
LN02200010
Optional
Optional only when meeting the condition
Communication
module kit
Remote control parts
ME30-00/E2
MC200030
Standard
For export, including communication module
In conclusion: Refer to the service manual for more details about the interface of the remote monitoring system and
BMS system (File No.: JF00300218 & JF00300219). If product specification has the modification, our company will not
issue a separate notice.
8 DETECTION CONTROL BOARD
8�1 Gate-control Function
This detection control board is only suitable for Gree multi-variable (GMV) indoor unit with gate-control function.
The AC will run after plugging in gate-control card and stop running after plugging out the card. Upon plugging out
the card to stop the unit, the running states of the unit will be memorized. After plugging in the card, the unit will be
under standby state or resume running according to settings. The AC will run when the customer plugs in the card and
automatically stop when he plugs out the card, which ensures unit off after leaving of persons and saves energy.
Fig.1 is about simple sketch for communication network of detection control board for GMV series.
Indoor
control
Indoor
control
Indoor
control
Indoor
control
Outdoor unit
Detection
Control Board
Detection
Control Board
Detection
Control Board
Detection
Control Board
Fig.1 Communication Network of Detection Control Board for GMV series
8�2 Working Process of Gate Control
1) If the gate-control card is not plugged in after powering on the complete unit, the indoor unit will be in the state
without gate-control function and can be operated by remote controller or buttons on it.
2) Powering on the AC and plugging in the card, the unit will be in the state with gate-control function after 5-second
detection. The present running state of the AC won’t be affected (the unit on/off state will be kept) after plugging in the
card. If plugging out the card, the AC will automatically stop after 5-second detection.
Once plugging in the card, indoor unit will be considered as the one with gate-control function, which can be
canceled only after powering off and then powering on the unit.
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