HVACopediaCarrier heat pump error codes
39 codes with causes and test steps.
| Code | Meaning | Severity |
|---|---|---|
| 25 | Invalid model plug / inverter size | High |
| 31 | High pressure switch open | High |
| 32 | Low pressure trip | Medium |
| 33 | Lost inverter communication | Medium |
| 46 | Brownout | Medium |
| 48 | Lost inverter communication - lockout | High |
| 49 | Compressor over current | Medium |
| 53 | Outdoor air temperature sensor fault | Medium |
| 54 | Suction temperature sensor fault | Medium |
| 55 | Outdoor coil temperature sensor fault | Medium |
| 56 | OAT / coil thermistor out of range | Medium |
| 57 | Suction pressure transducer fault | Medium |
| 59 | Discharge temperature high (event) | Medium |
| 61 | Fan inverter fault | Medium |
| 63 | Fan inverter current fault | Medium |
| 65 | DC bus voltage low - speed limiting | Medium |
| 66 | Outdoor fan dropped out | Medium |
| 67 | Stator heater fault | Medium |
| 68 | 10-minute stage 2 warm-up delay | Low |
| 69 | Inverter / compressor internal fault | High |
| 71 | Compressor dropped out | Medium |
| 72 | Suction over temperature (event) | Medium |
| 74 | Discharge temperature lockout | High |
| 75 | Maximum power mode - temperature | Medium |
| 76 | Fan inverter lockout | High |
| 77 | Maximum power mode - compressor current | Medium |
| 79 | Compressor / inverter fault (failed start) | Medium |
| 82 | Suction over temperature lockout | High |
| 83 | Low pressure lockout (4 hours) | High |
| 84 | High pressure lockout (4 hours) | High |
| 86 | Fan inverter current lockout | High |
| 88 | Compressor / inverter lockout | High |
| 91 | Inverter DC over voltage (event) | Medium |
| 92 | Inverter DC under voltage (event) | Medium |
| 95 | Compressor over current lockout | High |
| 96 | DC under voltage lockout | High |
| 97 | DC over voltage lockout | High |
| 98 | High torque event | Medium |
| 99 | High torque lockout | High |
Models covered
25HCB625HNB62425HNB63625HNB64825HNB66025HNB92425HNB93625HNB94825HNB96025HPA625VNA81325VNA82425VNA82525VNA83625VNA83725VNA84825VNA860CH17
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.