Ipm Protection - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

H5 Error Code

IPM Protection

H5
IPM Protection
Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
Test the isolation impedance between
Yes
Error Code Diagnostics
Fault & Status
Start Troubleshooting after unit
is powered off for 3 minutes
Are the compressor terminal
connected properly?
Yes
Check the compressor winding
resistance
Is the resistance normal?
Yes
the three phases of the compressor
and copper tubing
No
Is the resistance above
500MΩ?
Replace Compressor
Is Malfunction eliminated?
No
Replace the outdoor mainboard
End Troubleshooting
Possible Causes
1. Dirty indoor and outdoor coils
2. Faulty indoor or outdoor fans
3. High system pressure
4. Over charge of refrigerant
No
No
Correct wiring
problem
155