OEM Service Manual: Trane RTAC Air-Cooled Rotary Screw Chiller Service Manual (SVR-SVN001-EN). Available through Trane Commercial support.
34 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| ED | Evaporator Water Flow Lost | Warning | Chilled water pump stopped or failed | View Details → |
| FD | Emergency Stop | Critical | Emergency stop button pressed | View Details → |
| 8E | Evaporator Entering Water Temperature Sensor | Warning | Sensor element failure | View Details → |
| AB | Evaporator Leaving Water Temperature Sensor | Warning | Sensor degradation | View Details → |
| A1 | Outdoor Air Temperature Sensor | Warning | Sensor moisture ingress | View Details → |
| D7 | Over Voltage | Warning | Utility voltage surge | View Details → |
| D8 | Under Voltage | Warning | Utility brownout or sag | View Details → |
| F5 | High Pressure Cutout - Compressor 1A | Critical | Condenser coil fouled or airflow blocked | View Details → |
| BA | Motor Current Overload - Compressor 1A | Warning | Compressor motor bearing failure | View Details → |
| C5 | Low Chilled Water Temperature: Unit Off | Warning | Chilled water setpoint too low | View Details → |
| C6 | Low Chilled Water Temperature: Unit On | Warning | Evaporator flow too low while running | View Details → |
| B5 | Low Suction Refrigerant Pressure - Circuit 1 | Warning | Low refrigerant charge | View Details → |
| 198 | Low Oil Flow - Compressor 1A | Critical | Oil filter clogged | View Details → |
| 1C6 | High Differential Refrigerant Pressure - Circuit 1 | Critical | Condenser water temperature too high | View Details → |
| 1DE | High Oil Temperature - Compressor 1A | Warning | Oil cooler fouled or bypassed | View Details → |
| 398 | BAS Communication Lost | Warning | BAS network cable disconnected | View Details → |
| A2 | Condenser Air Temperature Sensor | Warning | Sensor element failure | View Details → |
| A3 | Economizer Leaving Water Temperature Sensor | Warning | Economizer sensor failure | View Details → |
| A4 | Chilled Water Entering Temperature Sensor | Warning | Sensor drift or failure | View Details → |
| AC | Chilled Water Leaving Temperature Sensor | Warning | Sensor element failure | View Details → |
| D1 | Suction Pressure Sensor - Circuit 1 | Warning | Pressure sensor element failure | View Details → |
| D2 | Discharge Pressure Sensor - Circuit 1 | Warning | Discharge pressure sensor failure | View Details → |
| D3 | Suction Pressure Sensor - Circuit 2 | Warning | Circuit 2 suction sensor failure | View Details → |
| D4 | Discharge Pressure Sensor - Circuit 2 | Warning | Circuit 2 discharge sensor failure | View Details → |
| D5 | Oil Pressure Sensor | Warning | Oil pressure sensor element failure | View Details → |
| D6 | Oil Temperature Sensor | Warning | Oil temperature sensor failure | View Details → |
| D9 | Compressor Motor Temperature Sensor | Warning | Motor winding temperature sensor failure | View Details → |
| B6 | Low Suction Refrigerant Pressure - Circuit 2 | Warning | Low refrigerant charge on circuit 2 | View Details → |
| F6 | High Pressure Cutout - Compressor 2A | Critical | Condenser coil fouled | View Details → |
| BB | Motor Current Overload - Compressor 2A | Warning | Compressor 2A motor bearing failure | View Details → |
| 199 | Low Oil Flow - Compressor 2A | Critical | Oil filter clogged on circuit 2 | View Details → |
| 1C7 | High Differential Refrigerant Pressure - Circuit 2 | Critical | Condenser water temp too high on circuit 2 | View Details → |
| 1DF | High Oil Temperature - Compressor 2A | Warning | Oil cooler on circuit 2 fouled | View Details → |
| 2E7 | High Condenser Refrigerant Temperature - Circuit 2 | Warning | Condenser water flow too low on circuit 2 | View Details → |
Disclaimer: All Trane RTAC 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.