OEM Service Manual: Trane RTHB Helical Rotary Chiller Service Manual. Available through Trane Commercial support.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| ED | Evaporator Water Flow Lost | Warning | Pump failure | View Details → |
| FD | Emergency Stop | Critical | E-stop activated | View Details → |
| F5 | High Pressure Cutout | Critical | Condenser fouled | View Details → |
| B5 | Low Suction Pressure | Warning | Low charge | View Details → |
| BA | Motor Overload | Critical | Bearing failure | View Details → |
| 198 | Low Oil Flow | Critical | Filter clogged | View Details → |
| 1DE | High Oil Temperature | Warning | Oil cooler fouled | View Details → |
| 2E6 | High Condenser Refrigerant Temperature | Warning | Condenser flow low | View Details → |
| 390 | Communication Lost - Main to Starter | Warning | CCN cable fault | View Details → |
| 398 | BAS Communication Lost | Warning | Network cable fault | View Details → |
| 5EF | System Watchdog | Warning | Software crash | View Details → |
| C5 | Low Chilled Water Temperature: Unit Off | Warning | Setpoint too low | View Details → |
| C6 | Low Chilled Water Temperature: Unit On | Warning | Low flow | View Details → |
| D7 | Over Voltage | Warning | Voltage surge | View Details → |
| D8 | Under Voltage | Warning | Brownout | View Details → |
| 3A0 | Compressor Vibration Alarm | Warning | Mounting loose | View Details → |
| D1 | Suction Pressure Sensor - Circuit 1 | Warning | Sensor element failure | View Details → |
| D2 | Discharge Pressure Sensor - Circuit 1 | Warning | Sensor failure | View Details → |
| D3 | Suction Pressure Sensor - Circuit 2 | Warning | Circuit 2 sensor failure | View Details → |
| D4 | Discharge Pressure Sensor - Circuit 2 | Warning | Sensor failure | View Details → |
| D5 | Oil Pressure Sensor | Warning | Sensor failure | View Details → |
| D6 | Oil Temperature Sensor | Warning | Sensor failure | View Details → |
| D9 | Compressor Motor Temperature Sensor | Warning | Motor winding temp sensor failure | View Details → |
| B6 | Low Suction Refrigerant Pressure - Circuit 2 | Warning | Low charge on circuit 2 | View Details → |
| F6 | High Pressure Cutout - Compressor 2A | Critical | Condenser fouled | View Details → |
| BB | Motor Current Overload - Compressor 2A | Warning | Bearing failure | View Details → |
| 199 | Low Oil Flow - Compressor 2A | Critical | Oil filter clogged | View Details → |
| 1C7 | High Differential Refrigerant Pressure - Circuit 2 | Critical | Condenser water temp too high | View Details → |
| 1DF | High Oil Temperature - Compressor 2A | Warning | Oil cooler fouled | View Details → |
| 2E7 | High Condenser Refrigerant Temperature - Circuit 2 | Warning | Condenser flow too low | View Details → |
Disclaimer: All Trane RTHB 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.