Carrier Heat Pump: 25HNB6
Re: Status Codes / Fault Codes
LOCKOUT CODES:
| Amber LED | Description |
| Constant On | No Demand / Standby |
| 1 - Pause | 1st Stage Compressor |
| 2 - Pause | 2nd Stage Compressor |
| 16 | System Communication Failure |
| 25 | Invalid Model Plug |
| 31 | Hi Pressure Switch Trip |
| 32 | Low Pressure or Discharge Temp Switch Trip |
| 45 | O/D Unit Control Board Failure |
| 46 | Low Line Voltage (Brown Out) |
| 47 | No Power Present at O/D Unit |
| 53 | Outdoor Temp Sensor Failure |
| 55 | Outdoor Coil Sensor Failure |
| 56 | Thermistors (Outdoor & Coil) Out of Range |
| 71 | Low Stage Thermal Cutout |
| 72 | High Stage Thermal Cutout |
| 73 | Contactor Stuck Closed |
| 74 | No Power at Compressor |
| 81 | Low Stage Thermal Cutout x 3 |
| 82 | High Stage Thermal Cutout x 3 |
| 83 | Low Pressure Switch Trip x 3 |
| 84 | High Pressure Switch Trip x 3 |