Gree VRF - Troubleshooting

Gree VRF Protocol Gateway
21
2.2.1 Adopt Modbus RTU communication method with BMS
Protocol interface: Modbus RTU protocol
Hardware interface: RS485
Baud rate: 9600
Start bit: 1
Data bit: 8
Parity bit: No
Stop bit: 1
Start
BMS equipment sent the
request frame that meets the
Modbus RTU protocol
criterion
Communication between
gateway and BMS equipment
is normal
Troubleshootin
g 2
CAN indicator of gateway
flashes, the communication
with the air conditioner is
normal
End
RS485-1
RX/TX indicator of
gateway flashes
YES
NO
2.2.2 Adopt Modbus TCP or BACnet communication method with
BMS
CAN TX indicator of
gateway flashes
BMS equipment sent the request control
frame that meets the Modbus TCP
protocol criterion
CAN RX indicator of gateway
flashes, the communication with
the air conditioner is normal
Start
CAN RX indicator of gateway flashes,
BMS communication is normal
End
Troubleshoo
ting 3
YES
NO