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U1-UP
Outdoor Unit Malfunction
Mitsubishi Electric · PAR-21MAA MA Remote Controller
¿Qué significa U1-UP ?
This range of codes (U1 through UP) indicates a general malfunction within the outdoor unit, as displayed on the remote controller LCD. For specific diagnostic details, further reference to the detailed error code list in the manual is required.
Causas comunes
- Malfunction of the outdoor unit's compressor control system.
- Failure in the outdoor unit's refrigerant flow control valve.
- Abnormal sensor readings from the outdoor unit (e.g., temperature, pressure).
- Loss of communication signal from the outdoor unit's main controller.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Refer to the 'Error code list' in section 'V.4.2.Error code list' of the complete manual for specific diagnostic information related to U1-UP codes.
- 2
Visually inspect the outdoor unit for any signs of damage, loose electrical connections, or abnormal sounds during operation.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Mitsubishi Electric PAR-21MAA MA Remote Controller