De-Synchronization Of Compressor - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

H7 Error Code, continued on next page

De-synchronization of compressor

H7
Desynchronizing of compressor
Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
Yes
156
Error Code Diagnostics
Troubleshooting Procedure for Synchronizing Fault after Unit is Started
Start Troubleshooting after unit
is powered off for 3 minutes
Are the compressor terminal
connected properly?
Yes
Replace Control Board AP1
Remove Malfunction?
No
Replace Compressor
End Troubleshooting
1. Check the resistance of the compressor
terminals and connections to the compressor
2. Check for overcharge of refrigerant
3. Check for correct voltage
4. Check for dirty coils and filters
No
Correct wiring
problem
Compressor Wires