Gree GMV-VQ680WM/C-X Service Manual page 161

Gree
2.95 "H0" Fan Drive Board Fault
Fault display: wired controller of indoor unit displays
Fault diagnosis:
Check the fault code displayed on the wired controller of the indoor unit. If the wired controller
displays HO, check the fault code displayed on the 2-digit digital LED of the main control board of the
outdoor unit, based on which you are able to identify the specific fault of the fan drive board. Then,
troubleshoot the fault according to the corresponding troubleshooting methods.
Possible causes:
■ Fan drive module reset protection (2-digit digital LED of the main control board of the outdoor unit
displays H3);
■ Temperature sensor fault of fan drive (2-digit digital LED of the main control board of the outdoor
unit displays H7);
■ IPM over temperature protection for the fan drive (2-digit digital LED of the main control board of
the outdoor unit displays H8);
■ Current detection circuit fault of fan drive (2-digit digital LED of the main control board of the
outdoor unit displays HC);
■ Charging loop fault of fan drive (2-digit digital LED of the main control board of the outdoor unit
displays HF);
■ Loss of synchronization protection for the inverter fan (2-digit digital LED of the main control board
of the outdoor unit displays H9);
■ Inverter fan startup failure (2-digit digital LED of the main control board of the outdoor unit displays
HJ).
Troubleshooting:
Step 1: Check the fault code displayed on the wired controller of the indoor unit.
Step 2: Check the fault code displayed on the 2-digit digital LED of the outdoor unit at the same
time.
Step 3: Troubleshoot according to the fault code displayed on the 2-digit digital LED of the outdoor
unit (troubleshooting procedures may vary depending on the fault).
2.96 "H1" Abnormal Fan Drive Board
Fault display: wired controller of indoor unit displays
Fault diagnosis:
Check the fault code displayed on the wired controller of the indoor unit. If the wired controller
displays H1, check the fault code displayed on the 2-digit digital LED of the main control board of the
outdoor unit, based on which you are able to identify the specific fault of the fan drive board. Then,
troubleshoot the fault according to the corresponding troubleshooting methods.
Possible causes:
■ IPM module protection for the fan drive (2-digit digital LED of the main control board of the outdoor
GMV6 HR DC Inverter VRF Units Service Manual
159