Gree GMV-VQ680WM/C-X Service Manual page 113

Gree
■ The main board operates improperly.
Troubleshooting:
Between the Primary Controller
and Inverter Compressor Driver
Whether the communication
cables between the main board of outdoor
unit and inverter compressor drive board
compressor drive board is normal?
The main control board may be
2.32 "C3" Communication Fault Between the Primary Controller and
Inverter Fan Driver
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
When the outdoor unit fails to detect inverter fan driver for 30 consecutive seconds, the fault is
generated.
Possible causes:
■ The communication cables between the main board of outdoor unit and inverter fan driver inside
the module are connected improperly;
■ The inverter fan driver operates improperly;
■ The main board operates improperly.
Troubleshooting:
"C2" Communication Fault
are connected properly?
Yes
Whether the outdoor unit's
Yes
abnormal
GMV6 HR DC Inverter VRF Units Service Manual
No
Connect the communication
No
Replace the compressor drive
Yes
Replace the main control board
111
cables properly
board