Gree GMV BACnet Manuel technique et d'entretien - Page 17

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Protocol shall refer to the specification.

2.3 EXCEPTION HANDLING

Note: Here are several reasons and troubleshooting methods for exception handling under

exception conditions. It not solved, please contact relevant professional Gree staff.

Communication connection cable

between gateway and AC unit is

not correct or the communication

cable is not connected

Check the continuity of

communication cable: refer

to "3.2 communication

connection" and check if the

communication connection

between BACnet gateway

and AC unit is correct

GMV BACnet Gateway Technical Service Manual

Yes

End

Abnormal condition

BACnet gateway

CAN light is not on

BACnet gateway does not

receive the data from AC unit

The matched resistance

in every nod of CAN

bus are not correctly set

Refer to the dial-up

setting in "1. Hardware

debug" and inspect if the

matched resistance in

CAN bus is correctly set

treatment 1

among CAN bus exceeds 500m

Decrease the communication

distance of CAN bus to 500m,

suggest to install BACnet

Communication distance

gateway nearby the AC