Rheem Heat Pump: RPNE
Re: Diagnostic Codes / Fault Codes
The defrost board uses two LEDs for diagnostics. The LEDs flash a specific sequence according to the condition.
DIAGNOSTIC CODES:
| LED 1 | LED 2 | Description |
| Alt Flashing | Anti-Short-Cycle Delay | |
| Off | Off | No 24V Power or Bad Control |
| On | On | Coil Sensor Failure |
| Off | On | Ambient Sensor Failure |
| Flash | Flash | Normal |
| On | Off | Pressure Switch Lockout |
| On | Flash | Low Pressure Switch Open |
| Flash | On | High Pressure Switch Open |