Carrier Heat Pump: 38YDB
Re: Lockout Codes / Fault Codes
LOCKOUT CODES:
| Flashes | Description |
| Constant Flash | No Demand / Standby |
| 1 | Low Speed Operation |
| 2 | High Speed Operation |
| 3 | Ambient Sensor Failure |
| 4 | Coil Sensor Failure |
| 3 + 4 | Sensor Out of Range |
| 5 + 1 | Low Pressure Switch Trip |
| 5 + 2 | High Pressure Switch Trip |
| 6 | Compressor Vc / Vh Trip |
| On | Board Failure |
WHAT TO LOOK FOR:
| Flash | Cooling | Heating |