OEM Service Manual: York YK Centrifugal Chiller Service Manual (Form 160.60-S1). Johnson Controls Technical Literature.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| E1 | Compressor motor over-temperature | Warning | Motor bearing failure | View Details → |
| E2 | Guide vane position fault | Warning | Guide vane actuator motor failure | View Details → |
| E3 | VSD communication fault | Warning | VSD communication cable damaged | View Details → |
| E4 | VSD over-temperature | Warning | VSD heatsink temperature high | View Details → |
| E5 | Surge detection alarm | Warning | Operating near surge line | View Details → |
| E6 | Oil pressure low | Critical | Oil pump failure | View Details → |
| E7 | Oil temperature high | Warning | Oil cooler fouled | View Details → |
| E8 | Condenser water flow fault | Warning | Condenser pump stopped | View Details → |
| E9 | Evaporator water flow fault | Warning | Chilled water pump stopped | View Details → |
| EA | High condenser pressure | Warning | Condenser water temp too high | View Details → |
| EB | Low evaporator temperature | Warning | Low refrigerant charge | View Details → |
| EC | Motor current overload | Warning | Bearing failure | View Details → |
| ED | Phase loss or reversal | Critical | Missing phase | View Details → |
| EE | BAS communication fault | Warning | Network cable fault | View Details → |
| EF | Oil leak detection | Warning | Oil leak detected in system | View Details → |
| F1 | Compressor vibration alarm | Warning | Mounting bolts loose | View Details → |
| E10 | Compressor motor bearing temperature high | Warning | Bearing lubrication inadequate | View Details → |
| E11 | Low refrigerant charge detected | Warning | Refrigerant leak in system | View Details → |
| E12 | High oil discharge temperature | Warning | Oil cooler inefficiency | View Details → |
| E13 | Variable geometry inlet fault | Warning | Inlet guide vane actuator failure | View Details → |
| E14 | Pumpdown sequence fault | Warning | Pumpdown solenoid valve not closing | View Details → |
| E15 | Compressor surge detection | Warning | Operating near surge line | View Details → |
| E16 | Oil leak detection | Warning | Oil leak detected | View Details → |
| E17 | VSD speed feedback fault | Warning | Speed feedback sensor failure | View Details → |
| E18 | VSD motor overload | Critical | Compressor motor excessive current | View Details → |
| E19 | VSD DC bus overvoltage | Warning | Regenerative energy | View Details → |
| E20 | VSD DC bus undervoltage | Warning | Input voltage sag | View Details → |
| E21 | VSD output phase loss | Critical | Output terminal loose | View Details → |
| E22 | VSD ground fault | Warning | Ground fault on output | View Details → |
| E23 | VSD communication timeout | Warning | Communication timeout | View Details → |
Disclaimer: All York YK 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.