OEM Service Manual: Carrier 30XW (AquaForce) Installation, Operation and Maintenance Manual. Available through Carrier Commercial Systems.
30 codes
| Fault Code | Alarm Description | Severity | Probable Causes | Action |
|---|---|---|---|---|
| 1 | Evaporator entering water temperature sensor fault | Warning | Sensor element failure | View Details → |
| 2 | Evaporator leaving water temperature sensor fault | Warning | Sensor element degradation | View Details → |
| 3 | Condenser entering water temperature sensor fault | Warning | Sensor failure | View Details → |
| 7 | Outdoor air temperature sensor fault | Warning | Sensor moisture ingress | View Details → |
| 14 | Discharge pressure transducer fault | Warning | Transducer element failure | View Details → |
| 16 | Suction pressure transducer fault | Warning | Transducer port blocked | View Details → |
| 30 | CCN communication fault | Warning | CCN cable damaged | View Details → |
| 41 | Emergency stop | Critical | E-stop button activated | View Details → |
| 44 | Discharge pressure too high | Critical | Condenser water flow low | View Details → |
| 54 | Oil level low | Critical | Oil leak through system | View Details → |
| 56 | Low saturated suction temperature | Warning | Low refrigerant charge | View Details → |
| 68 | Low oil pressure | Critical | Oil pump wear | View Details → |
| 72 | Evaporator frost protection | Critical | Low water flow | View Details → |
| 77 | High compressor motor current | Warning | Motor bearing failure | View Details → |
| 85 | High motor winding temperature | Warning | Motor cooling insufficient | View Details → |
| 4 | Condenser leaving water temperature sensor fault | Warning | Sensor element failure | View Details → |
| 5 | Defrost thermistor failure | Warning | Sensor element degraded | View Details → |
| 6 | Remote temperature sensor failure | Warning | Remote sensor failure | View Details → |
| 8 | Compressor A2 discharge temperature sensor fault | Warning | Sensor element failure | View Details → |
| 10 | Compressor B1 discharge temperature sensor fault | Warning | Sensor failure on circuit B | View Details → |
| 15 | Discharge pressure transducer failure circuit B | Warning | Transducer diaphragm damaged | View Details → |
| 17 | Suction pressure transducer failure circuit B | Warning | Sensing port blocked | View Details → |
| 20 | Compressor motor overload circuit A | Critical | Motor drawing excessive current | View Details → |
| 21 | Compressor motor overload circuit B | Critical | Motor overload on circuit B | View Details → |
| 31 | Loss of communication with SCPM B1 | Warning | CCN cable to circuit B damaged | View Details → |
| 38 | Power supply error | Warning | Phase voltage imbalance | View Details → |
| 45 | Discharge pressure circuit B too high | Warning | Condenser B fouling | View Details → |
| 46 | Suction pressure circuit A too low | Warning | Low refrigerant on circuit A | View Details → |
| 47 | Suction pressure circuit B too low | Warning | Low refrigerant on circuit B | View Details → |
| 55 | Oil level circuit B low | Warning | Refrigerant leak on B carrying oil | View Details → |
Disclaimer: All Carrier 30XW 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.