OEM Service Manual: York YCAL Air-Cooled Scroll Chiller Installation and Maintenance Manual (Form 160.00-S1). Johnson Controls/York Technical Literature.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| E1 | Indoor ambient temperature sensor abnormal | Warning | Sensor element failure | View Details → |
| E2 | Outdoor coil temperature sensor abnormal | Warning | Sensor degradation from weather exposure | View Details → |
| E3 | Indoor coil temperature sensor abnormal | Warning | Sensor element drifted | View Details → |
| E4 | PG motor feedback abnormal | Warning | PG motor Hall sensor failure | View Details → |
| E5 | Indoor display and mainboard communication fault | Warning | Communication cable between display and mainboard loose | View Details → |
| E8 | Indoor/outdoor communication fault | Warning | Inter-unit communication cable damaged | View Details → |
| F1 | Module protection fault | Warning | Inverter module overheating | View Details → |
| F3 | Compressor operation failure | Warning | Compressor mechanical lock | View Details → |
| F4 | Outdoor discharge sensor fault | Warning | Discharge temperature sensor failure | View Details → |
| F5 | Compressor top cover protection | Warning | Compressor casing temperature too high | View Details → |
| F6 | Outdoor ambient sensor fault | Warning | Sensor moisture ingress | View Details → |
| F7 | Over/under voltage protection | Warning | Utility voltage outside acceptable range | View Details → |
| FA | Return gas sensor fault | Warning | Return gas temperature sensor failure | View Details → |
| FB | Low pressure switch fault | Warning | Low refrigerant charge causing low suction pressure | View Details → |
| FC | Compressor protection fault | Warning | Compressor internal protection activated | View Details → |
| FD | System mode conflict | Warning | Conflicting operating mode commands | View Details → |
| FE | Sensor calibration error | Warning | Sensor reading outside calibration range | View Details → |
| FF | Control system fault | Warning | Control board processor fault | View Details → |
| F0 | Expansion valve communication error | Warning | Electronic expansion valve controller offline | View Details → |
| F2 | Condenser pressure transducer fault | Warning | Condenser pressure transducer element failure | View Details → |
| F8 | Evaporator pressure transducer fault | Warning | Evaporator pressure transducer failure | View Details → |
| F9 | Oil differential pressure switch | Warning | Oil pressure differential below threshold | View Details → |
| H1 | High condensing temperature | Warning | Condenser coil fouled | View Details → |
| H2 | Low evaporating temperature | Warning | Low refrigerant charge | View Details → |
| H3 | Compressor discharge temperature high | Warning | High compression ratio | View Details → |
| H4 | Motor winding temperature high | Warning | Motor bearing wear | View Details → |
| H5 | Inverter over-temperature | Warning | Inverter heatsink fan failure | View Details → |
| H6 | Compressor capacity control fault | Warning | Capacity control solenoid valve failure | View Details → |
| HC | Compressor capacity control fault | Warning | Capacity control solenoid valve failure | View Details → |
| HD | Condensate level high | Warning | Condensate drain blocked | View Details → |
Disclaimer: All York YCAL fault code data is for reference only. Do not use this information to replace certified professional HVAC technician judgment. Always refer to original OEM official service manual.