Gree error code H1
What it means
Defrost mode status indication (not a fault).
Possible causes
Normal frost accumulation on outdoor coil Low ambient operation causing periodic defrost Control algorithm initiating defrost cycle
Suggested fix
Confirm H1 clears when defrost completes and that heating performance is acceptable; if defrost is too frequent or ineffective, have the sensors and coil condition inspected.
Safety first. Isolate the power supply before inspecting any unit. Refrigerant-circuit
and electrical repairs must be carried out by a qualified, registered technician.
Other Gree codes
- C5 — Configuration jumper or PCB setup error.
- E1 — High pressure protection in the refrigeration circuit.
- E3 — Low pressure protection.
- E5 — Overcurrent protection on compressor or main circuit.
- E7 — Mode conflict between indoor and outdoor units.
- F1 — Indoor ambient (room) sensor fault.
- F2 — Indoor evaporator temperature sensor fault.
- F3 — Outdoor ambient temperature sensor fault.
- F4 — Outdoor coil temperature sensor fault.
- F5 — Compressor discharge temperature sensor fault.