Gree error code H5
What it means
Midwall: IPM (intelligent power module) protection. CGIF/GCIF inverter cassette: IPM protection.
Possible causes
IPM detecting overcurrent or overtemperature DC bus voltage instability Compressor electrical fault being limited by IPM
Suggested fix
Evaluate power supply and DC bus values, check compressor windings and ensure adequate cooling of the IPM; replace the IPM or outdoor inverter board when testing confirms module failure and verify the compressor is not the root cause.
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.
- CC — Outdoor drive board memory chip malfunction (replace outdoor drive board if persistent) (CGIF/GCIF inverter cassette).
- E1 — Midwall: High pressure protection in the refrigeration circuit. CGIF/GCIF inverter cassette: Compressor high-pressure protection (high-pressure switch open for 3 s; unit locks out until power reset).
- E2 — Indoor anti-freezing protection (evaporator temperature below protective value; compressor and outdoor fan stop) (CGIF/GCIF inverter cassette).
- E3 — Midwall: Low pressure protection. CGIF/GCIF inverter cassette: Compressor low-pressure / refrigerant-lacking protection (also shown during refrigerant recycling mode).
- E4 — Compressor high discharge temperature protection (locks out after 6 occurrences) (CGIF/GCIF inverter cassette).
- E5 — Overcurrent protection on compressor or main circuit.
- E6 — Communication failure between indoor and outdoor main boards (or display board and indoor unit) (CGIF/GCIF inverter cassette).
- E7 — Mode conflict between indoor and outdoor units.
- E8 — Indoor fan motor malfunction (no fan signal for 30 s; locks out after 6 events in an hour) (CGIF/GCIF inverter cassette).