OEM Service Manual: Daikin WME Water-Cooled Screw Chiller Service Manual. Available through Daikin Applied technical support.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| U0 | Refrigerant shortage | Warning | Refrigerant leak | View Details → |
| U1 | Phase sequence error | Warning | Phase sequence reversed | View Details → |
| U2 | Power voltage abnormality | Warning | Voltage too high or low | View Details → |
| E0 | High temperature protection | Warning | Condenser fouled | View Details → |
| E1 | Circuit board failure | Warning | Board component failure | View Details → |
| E2 | Temperature sensor fault | Warning | Sensor element failure | View Details → |
| E3 | Compressor overload | Warning | Motor drawing excessive current | View Details → |
| E4 | Discharge temperature high | Warning | High compression ratio | View Details → |
| E5 | Oil temperature abnormal | Warning | Oil cooler not functioning | View Details → |
| E6 | Compressor motor lock | Warning | Compressor seized | View Details → |
| E7 | Fan motor abnormality | Warning | Fan motor winding failure | View Details → |
| H0 | Temperature sensor fault | Warning | Sensor failure | View Details → |
| H1 | High pressure switch | Critical | Discharge pressure too high | View Details → |
| H2 | Low pressure switch | Warning | Suction pressure too low | View Details → |
| H3 | Compressor oil level low | Critical | Oil lost through leak | View Details → |
| L0 | Inverter system abnormality | Warning | Multiple inverter faults | View Details → |
| L4 | Inverter output short circuit | Warning | Short circuit on output | View Details → |
| E8 | Evaporator water flow fault | Warning | Pump stopped | View Details → |
| E9 | Condenser water flow fault | Warning | Condenser pump stopped | View Details → |
| E10 | Freeze protection | Critical | Evaporator temp near freezing | View Details → |
| E11 | Compressor surge alarm | Warning | Operating near surge line | View Details → |
| E12 | High bearing temperature | Warning | Bearing lubrication inadequate | View Details → |
| E13 | Low subcooling alarm | Warning | Refrigerant charge low | View Details → |
| E14 | High superheat alarm | Warning | Expansion valve starving | View Details → |
| E15 | Compressor start inhibit | Warning | Safety interlock preventing start | View Details → |
| E16 | Evaporator approach temperature high | Warning | Fouled evaporator tubes | View Details → |
| E17 | Condenser approach temperature high | Warning | Fouled condenser tubes | View Details → |
| E18 | Chiller staging error | Warning | Compressor staging logic error | View Details → |
| E19 | Energy efficiency alarm | Warning | Chiller operating below expected efficiency | View Details → |
| E20 | Refrigerant leak detection alarm | Warning | Leak detector sensor triggered | View Details → |
Disclaimer: All Daikin WME 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.