U2

Abnormal Discharge Temperature / Insufficient Refrigerant

Description

The compressor discharge temperature is abnormally high, usually caused by a refrigerant leak, insufficient refrigerant charge, or a blocked refrigerant circuit.

Appliance Error Codes Details

Error Code
U2
Error Name
Abnormal Discharge Temperature / Insufficient Refrigerant
Appliance Type
air_conditioner
Brand
Mitsubishi
Severity
high

Additional Troubleshooting

1. Turn off the unit
2. Check that the stop (service) valves are fully open
3. Do not attempt DIY refrigerant work
4. Contact a licensed technician to check for leaks and verify the refrigerant charge

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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

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