HVACopediaCarrier mini-split error codes
129 codes (94 faults, 35 normal display and menu codes).
| Code | Meaning | Severity / type |
|---|---|---|
| d1 | Demand response signal DR1 received | Normal status |
| d2 | Demand response signal DR2 received | Normal status |
| d3 | Demand response signal DR3 received | Normal status |
| E1 | Indoor / outdoor communication error | High |
| EC07 | Outdoor fan speed out of range | High |
| EC50 | Outdoor temperature sensor fault | Medium |
| EC51 | Outdoor EEPROM error | High |
| EC52 | Condenser coil sensor (T3) fault | Medium |
| EC53 | Outdoor ambient sensor (T4) fault | Medium |
| EC54 | Discharge temperature sensor (TP/T5) fault | Medium |
| EC55 | IPM temperature sensor fault | Medium |
| EC56 | Indoor coil outlet sensor (T2B) fault | Medium |
| EC57 | Refrigerant pipe sensor fault | Medium |
| EC71 | Outdoor fan motor over-current | High |
| EC72 | Outdoor fan motor phase loss | High |
| EH00 | Indoor EEPROM error | High |
| EH0A | Indoor EEPROM error | High |
| EH0b | Indoor PCB to display board communication error | Medium |
| EH02 | Zero-crossing signal error | Medium |
| EH03 | Indoor fan speed out of range | High |
| EH30 | Indoor external fan low voltage | Medium |
| EH31 | Indoor external fan over voltage | Medium |
| Eh60 | Room sensor (T1) fault | Medium |
| Eh61 | Indoor coil sensor (T2) fault | Medium |
| EL0C | Refrigerant leak detected | High |
| EL01 | Indoor / outdoor communication error | High |
| F0 | Current overload protection | High |
| F1 | Outdoor ambient sensor (T4) fault | Medium |
| F2 | Condenser coil sensor (T3) fault | Medium |
| F3 | Discharge sensor (T5) fault | Medium |
| F4 | Outdoor EEPROM error | High |
| F5 | Outdoor fan speed out of control | High |
| FL14 | Indoor and outdoor units not compatible | Medium |
| J0 | Outdoor coil overheat in cooling | Medium |
| J1 | Indoor coil temperature protection in heating | Medium |
| J2 | Discharge temperature protection | High |
| J3 | PFC module protection | High |
| J4 | Main board to IPM board communication error | High |
| J5 | High pressure protection | High |
| J6 | Low pressure protection | High |
| J8 | AC voltage protection | High |
| LC01 | Speed limited by condenser temperature | Menu / mode display |
| LC02 | Speed limited by discharge temperature | Menu / mode display |
| LC03 | Speed limited by current | Menu / mode display |
| LC05 | Speed limited by voltage | Menu / mode display |
| LC06 | IPM high temperature / PFC frequency limit | Medium |
| LH00 | Speed limited by indoor coil temperature | Menu / mode display |
| LH07 | Speed limited by remote | Menu / mode display |
| P0 | Inverter module (IPM) fault | Critical |
| P1 | Over or under voltage protection | High |
| P2 | Compressor top overheat (OLP) | High |
| P3 | Low outdoor temperature cut-off in heating | Low |
| P4 | Compressor drive fault | High |
| P7 | IPM temperature sensor fault | Medium |
| PC00 | Inverter module (IPM) protection | Critical |
| PC0A | Condenser high temperature protection | Medium |
| PC0F | PFC module protection | High |
| PC0L | Outdoor temperature too low | Low |
| PC02 | Compressor top overheat (OLP) | High |
| PC03 | Pressure protection | High |
| PC04 | Inverter compressor drive error | High |
| PC06 | Discharge temperature protection | High |
| PC08 | Outdoor over-current protection | High |
| PC10 | Low AC supply voltage | High |
| PC11 | AC supply voltage protection (over voltage) | High |
| PC12 | DC bus high voltage / 341 MCE error | High |
| PC30 | High pressure protection | High |
| PC31 | Low pressure protection | High |
| PC40 | Main chip to compressor drive chip communication error | High |
| PC41 | Current input detection protection | Medium |
| PC42 | Compressor start failure | High |
| PC43 | Compressor phase loss | High |
| PC44 | Zero speed protection | High |
| PC45 | Compressor drive chip (IR / 341 PWM) failure | High |
| PC46 | Compressor speed out of control | High |
| PC49 | Compressor over-current | High |
| PCA1 | Refrigerant pipe condensation protection | Low |
| PH09 | Anti-cold-air in heating | Normal status |
| PH90 | Evaporator coil too hot | Medium |
| PH91 | Evaporator coil too cold | Medium |
| -- | Indoor units mode conflict | Menu / mode display |
| AP | Wi-Fi pairing (AP mode) | Menu / mode display |
| CL | Filter cleaning reminder / Active Clean | Menu / mode display |
| CP | Remote switched off | Menu / mode display |
| E-C-O | ECO mode | Normal status |
| FC | Forced cooling | Normal status |
| FH 0P | AP mode on / no Wi-Fi kit | Menu / mode display |
| FH 0d | Fault - see outdoor unit | Menu / mode display |
| FP | Low-temperature heating (8 C mode) | Normal status |
| Fb | Vapor injection inlet sensor fault | Medium |
| Fd | Vapor injection outlet sensor fault | Medium |
| LL | Controls locked | Menu / mode display |
| ODU -- | Outdoor board standby | Normal status |
| ODU 00 | Wiring / piping check finished | Menu / mode display |
| ODU CE | Automatic wiring / piping check running | Menu / mode display |
| ODU E0 | Outdoor EEPROM error (outdoor board) | High |
| ODU E2 | Indoor / outdoor communication error (outdoor board) | High |
| ODU E3 | IPM to main board communication error (outdoor board) | High |
| ODU E4 | Outdoor or T2B sensor fault (outdoor board) | Medium |
| ODU E5 | Over or under voltage (outdoor board) | High |
| ODU E6 | PFC module protection (outdoor board) | High |
| ODU E8 | Outdoor fan speed fault (outdoor board) | High |
| ODU Ed | Adapter / inverter board to main board communication error | High |
| ODU F1 | Zone A coil outlet sensor (T2B-A) fault | Medium |
| ODU F2 | Zone B coil outlet sensor (T2B-B) fault | Medium |
| ODU F3 | Zone C coil outlet sensor (T2B-C) fault | Medium |
| ODU F4 | Zone D coil outlet sensor (T2B-D) fault | Medium |
| ODU F5 | Zone E coil outlet sensor (T2B-E) fault | Medium |
| ODU F6 | Zone F coil outlet sensor (T2B-F) fault | Medium |
| ODU Hz readout | Compressor running frequency | Normal status |
| ODU LC | Low ambient cooling mode | Normal status |
| ODU LP | Low outdoor temperature protection (outdoor board) | Low |
| ODU P0 | Compressor top overheat (outdoor board) | High |
| ODU P1 | High pressure protection (outdoor board) | High |
| ODU P2 | Low pressure protection (outdoor board) | High |
| ODU P3 | Current overload (outdoor board) | High |
| ODU P4 | Discharge temperature protection (outdoor board) | High |
| ODU P5 | Condenser high temperature (outdoor board) | Medium |
| ODU P6 | Inverter module (IPM) fault (outdoor board) | Critical |
| ODU PH | Compressor pre-heat | Normal status |
| ODU RO | Oil return cycle | Normal status |
| Off | Timer off | Menu / mode display |
| On | Timer on | Menu / mode display |
| SC | Self clean running | Normal status |
| SD | Power abnormal detection | Menu / mode display |
| dE | Demand response input error | Menu / mode display |
| dF | Defrost | Normal status |
| nA | No fault | Normal status |
| nF | Filter replacement reminder | Menu / mode display |
Models covered
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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.