Carrier troubleshootingCarrier fault codes
Each code links to the manual page it comes from. Pick the family that matches the nameplate.
24VNA6 / 25VNA4 series
- 65EXV-VI Phase Open; EXV-VI Power Short to Ground; EXV-VI Phase Short to Ground
- 66VFD Control Relay Coil Open; VFD Control Relay Coil Shorted
- 81PFC Error; Unbalanced PFCM Error; VFD System Wiring Error
- 82VFD Line Current Speed Reduction; VFD Reset with Power Dropout; VFD Shutdown with Power Dropout; Low Voltage Shutdown; High Voltage Shutdown
- 83Compressor Current Limit 1 Speed Reduction; Compressor Current Limit 2 Speed Reduction; Compressor Current Limit 3 Shutdown; Compressor Current Limit 4 Shutdown; Compressor Underspeed Shutdown
- 84VFD Heat Sink Overtemp Shutdown
- 85DC Under Voltage Shutdown; DC Over Voltage Shutdown
- 86VFD Communication Error
- 87VFD Initialization Error
- 88Unexpected VFD Reset; VFD Reprogramming Failure; VFD Internal Error - Current Sensor; VFD Internal Error - IPM Temp Sensor; VFD Internal Error - DC Link Sensor; VFD Internal Error - PFCM Sensor A; VFD Internal Error - PFCM Sensor B; VFD Internal Error - Line Volt Sensor; VFD Internal Error - PFCM Temp Sensor; VFD Internal Error - DC Discharge
ERV & HRV Fresh Air Systems User and Installer Manual
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