OEM Service Manual: Carrier 23XRV AquaForce Variable Speed Screw Chiller Service Manual. Available through Carrier Commercial Systems.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| 1 | Evaporator water temperature sensor fault | Warning | Sensor failure | View Details → |
| 7 | Outdoor temperature sensor fault | Warning | Sensor element failure | View Details → |
| 14 | Discharge pressure transducer fault | Warning | Transducer failure | View Details → |
| 44 | High discharge pressure | Warning | Condenser water flow low | View Details → |
| 54 | Oil level low | Critical | Oil leak | View Details → |
| 68 | Low oil pressure | Critical | Oil pump wear | View Details → |
| VSD1 | VSD communication fault | Warning | VSD communication cable damaged | View Details → |
| VSD2 | VSD over-temperature | Warning | VSD heatsink temperature too high | View Details → |
| VSD3 | VSD hardware fault | Warning | VSD power module failure | View Details → |
| VSD4 | VSD DC bus overvoltage | Warning | Regenerative energy from compressor | View Details → |
| VSD5 | VSD DC bus undervoltage | Warning | Input voltage sag | View Details → |
| VSD6 | VSD output phase loss | Critical | Output terminal loose | View Details → |
| VSD7 | VSD ground fault | Warning | Ground fault on output | View Details → |
| VSD8 | VSD motor overload | Critical | Compressor motor drawing excessive current | View Details → |
| VSD9 | VSD speed feedback fault | Warning | Speed feedback sensor failure | View Details → |
| VSD0 | VSD communication timeout | Warning | Communication timeout between main controller and VSD | View Details → |
| 2 | Evaporator leaving water temperature sensor fault | Warning | Sensor degradation | View Details → |
| 3 | Condenser entering water temperature sensor fault | Warning | Sensor failure | View Details → |
| 5 | Defrost thermistor failure | Warning | Sensor element failure | View Details → |
| 8 | Compressor discharge gas temperature sensor fault | Warning | Sensor element failure | View Details → |
| 16 | Suction pressure transducer fault | Warning | Transducer port blocked | View Details → |
| 20 | Compressor motor overload | Critical | Motor drawing excessive current | View Details → |
| 30 | CCN communication fault | Warning | CCN cable damaged | View Details → |
| 56 | Low saturated suction temperature | Warning | Low refrigerant charge | View Details → |
| 72 | Evaporator frost protection | Critical | Low water flow | View Details → |
| 77 | High compressor motor current | Warning | Motor bearing failure | View Details → |
| 41 | Emergency stop | Critical | E-stop button activated | View Details → |
| 85 | High motor winding temperature | Warning | Motor cooling insufficient | View Details → |
| 88 | Fault code memory error | Warning | Control board memory corruption | View Details → |
| 90 | Bearing wear monitoring alarm | Warning | Bearing vibration trend increasing | View Details → |
Disclaimer: All Carrier 23XRV 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.