York Package Units: PHE
Re: Fault Codes / Diagnostic Codes
| Red Light Status | Description |
| Off | No Power to Control |
| On | Compressor Operation Active |
| Slow Flash | Normal - No Compressor |
| Fast Flash | Anti Short Cycle Delay |
| 2 | Hi Pressure Fault (Not in Lockout Yet) |
| 3 | Hi Pressure Lockout (Last mode heat or cool) |
| 4 | Hi Pressure Lockout (Last mode defrost) |
| 5 | Low Pressure Lockout |
| 6 | Low Voltage (<19.2 VAC) |
| 7 | Low Voltage (<16 VAC) |
| 8 | Liquid Line Sensor Failure |
| 9 | Outdoor Sensor Failure |
| 10 | Control Failure |