PU

Capacitor Charging Malfunction

Description

The inverter drive's DC bus capacitor failed to charge properly during startup, preventing the compressor from running.

Appliance Error Codes Details

Error Code
PU
Error Name
Capacitor Charging Malfunction
Appliance Type
air_conditioner
Brand
Carrier
Severity
high

Additional Troubleshooting

1. Power cycle the unit
2. Check the input power supply voltage is stable
3. Do not open the outdoor unit yourself — this circuit carries high voltage
4. Contact service for capacitor and rectifier inspection

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Fact-checking completed

Verified by: Pavel Volkov
Created:
Last updated:
Information verified against official sources

Official Sources

Official Manufacturer Service Manuals

Service manuals and technical documentation from appliance manufacturers

Original equipment manufacturers official documentation

Industry Standards Organizations

International standards for electrical appliances and error codes

International Electrotechnical Commission standards