HVACopediaGree heat pump error codes
125 codes with causes and test steps.
| Code | Meaning | Severity |
|---|---|---|
| A0 | Waiting for commissioning (status) | Low |
| b1 | Outdoor ambient sensor open or shorted (15K) | Medium |
| b2 | Defrost (coil) sensor open or shorted (20K) | Medium |
| b4 | Sub-cooler liquid outlet sensor open or shorted (20K) | Medium |
| b5 | Liquid line (valve) temperature sensor open or shorted | Medium |
| b6 | Accumulator inlet sensor open or shorted (20K) | Medium |
| b7 | Gas line (valve) temperature sensor open or shorted | Medium |
| C0 | Communication fault IDU/ODU/wired controller | High |
| C1 | Main board to DC-DC controller communication fault | High |
| C2 | Main board to compressor drive communication fault | High |
| C3 | Main board to fan drive communication fault | High |
| C4 | Missing indoor units | High |
| C5 | Jumper (capacity) cap missing or bad | Medium |
| d1 | Indoor main board fault | High |
| d3 | Indoor return air sensor open or shorted (15K) | Medium |
| d4 | Indoor coil inlet pipe sensor open or shorted (20K) | Medium |
| d5 | Indoor coil middle pipe sensor open or shorted (20K) | Medium |
| d6 | Indoor coil outlet pipe sensor open or shorted (20K) | Medium |
| d9 | Indoor jumper cap fault | Medium |
| E0 | Outdoor unit fault (shown with another code) | Medium |
| E1 | High pressure protection | High |
| E2 | Indoor coil freeze protection (status) | Low |
| E3 | Low pressure protection | High |
| E4 | Compressor discharge temperature too high | High |
| E5 | Overcurrent protection (whole unit) | High |
| E6 | Indoor/outdoor communication fault | High |
| E7 | Mode conflict between indoor units (status) | Low |
| E8 | High temperature / overload protection | Medium |
| E9 | Cold air prevention (status) | Low |
| F0 | Low refrigerant / refrigerant blocked protection | High |
| F1 | Indoor room air sensor open or shorted | Medium |
| F2 | Indoor coil sensor open or shorted | Medium |
| F3 | Outdoor ambient sensor open or shorted | Medium |
| F4 | Outdoor coil (condenser middle) sensor open or shorted | Medium |
| F5 | Compressor discharge sensor open or shorted | Medium |
| F6 | Compressor slowed - overload | Low |
| F8 | Compressor slowed - high current | Low |
| F9 | Compressor slowed - high discharge temperature | Low |
| H0 | Compressor slowed - high indoor coil temp in heating | Low |
| H1 | Defrost or oil return (status) | Low |
| H3 | Compressor overload protection | High |
| H4 | System abnormal (overload) | Medium |
| H5 | IPM (inverter module) protection | High |
| H6 | Indoor fan motor not running / no feedback | High |
| H7 | Compressor lost synchronism | High |
| H8 | Fan drive module overheated | High |
| H9 | Inverter fan lost synchronism | High |
| J1 | Compressor overcurrent | High |
| J7 | 4-way valve gas mixing | High |
| J8 | High pressure ratio protection | Medium |
| J9 | Low pressure ratio protection | Medium |
| L0 | Indoor unit fault | Medium |
| L1 | Indoor fan protection | High |
| L3 | Outdoor DC fan motor fault | High |
| L4 | Wired controller power fault | Low |
| L5 | Indoor freeze protection | Low |
| L6 | Mode conflict (24 V adapter systems) | Low |
| L7 | No master indoor unit | Medium |
| L8 | Indoor power insufficient | Medium |
| L9 | Power protection | Medium |
| P4 | Compressor drive PFC protection | High |
| P5 | Compressor phase overcurrent | High |
| P6 | Compressor drive IPM protection | High |
| P7 | Inverter module temperature sensor fault | Medium |
| P8 | Inverter module overheated | High |
| P9 | Inverter compressor lost synchronism | High |
| U0 | Compressor preheat not finished | Low |
| U1 | Compressor phase current sensing fault | High |
| U2 | Outdoor capacity code / jumper wrong | Medium |
| U3 | DC bus voltage drop | Medium |
| U4 | Refrigerant shortage at startup | High |
| U5 | Whole-unit current sensing fault | High |
| U6 | Service valves not opened | Medium |
| U7 | Reversing (4-way) valve fault | High |
| U8 | Indoor zero-crossing signal fault | Medium |
| U9 | Outdoor zero-crossing fault | High |
| AU | Remote emergency stop | Low |
| Ab | Emergency stop | Medium |
| CH | Indoor capacity too high | Medium |
| CL | Indoor capacity too low | Medium |
| CP | More than one master wired controller | Low |
| EE | EEPROM / memory chip fault | High |
| EU | Compressor slowed - module running hot | Low |
| Ed | Drive IPM low temperature protection | Medium |
| FH | Compressor slowed - indoor coil anti-freeze | Low |
| FP | Outdoor DC fan motor fault | High |
| Fo | Refrigerant recovery (pump-down) mode | Low |
| HA | Fan drive memory chip fault | High |
| HC | PFC protection | High |
| HE | Inverter fan phase loss | High |
| HF | Fan drive charging circuit fault | High |
| HH | Fan drive DC bus voltage too high | High |
| HJ | Inverter fan failed to start | High |
| HL | Fan drive DC bus voltage too low | High |
| HP | Inverter fan AC current protection | High |
| HU | Fan drive AC input voltage fault | High |
| JA | Abnormal pressure protection | High |
| JF | WiFi module fault | Low |
| JL | High pressure too low | High |
| LA | Group control: indoor series mismatch | Low |
| LC | Compressor failed to start | High |
| LJ | Indoor function DIP setting wrong | Medium |
| LP | Indoor and outdoor units do not match | Medium |
| LU | PG fan motor zero-crossing fault | Medium |
| Lb | Group control: units from different systems | Low |
| Ld | Compressor phase loss | High |
| PA | Compressor drive memory chip fault | High |
| PC | Compressor drive current sensing fault | High |
| PE | Inverter compressor phase loss | High |
| PF | Compressor drive charging circuit fault | High |
| PH | DC bus voltage too high | High |
| PJ | Inverter compressor failed to start | High |
| PL | DC bus voltage too low | High |
| PP | Inverter compressor AC current protection | High |
| PU | DC bus capacitor charging fault | High |
| UE | Refrigerant charging invalid | Medium |
| bH | System clock abnormal | Low |
| bJ | High and low pressure sensors swapped | Medium |
| bd | Sub-cooler gas inlet sensor open or shorted (20K) | Medium |
| dC | Indoor capacity DIP setting wrong | Medium |
| dH | Wired controller board fault | Low |
| dL | Indoor discharge air sensor open or shorted (15K) | Medium |
| dd | Wiring/EEV check running (status) | Low |
| dn | Wrong interconnect wiring or EEV fault | Medium |
| oE | Undefined outdoor unit error | Medium |
Models covered
3VIR09HP115V1A3VIR09HP230V1A3VIR12HP115V1A3VIR12HP230V1A3VIR18HP230V1A3VIR24HP230V1A4LIV30HP230V1AH4LIV36HP230V1AHGMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)MULTI18HP230V1COMULTI24HP230V1COSAP09HP230V1AHSAP12HP230V1AHSAP18HP230V1AHSAP24HP230V1AH
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.