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U6

U6 - Compressor over current (Overload) cut off in outdoor unit

MHI · R410A Systems

¿Qué significa U6 ?

This error indicates that the outdoor unit's compressor has experienced an overload and has shut down to protect itself from damage.

Causas comunes

  • Overheating compressor due to dirty coils or poor airflow.
  • Low refrigerant charge.
  • Electrical issues (e.g., voltage fluctuations).
  • Faulty compressor motor.
  • Restricted refrigerant flow.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Turn off the main power to the AC system at the circuit breaker and wait 30 minutes for the compressor to cool down.

  2. 2

    Clear any obstructions from around the outdoor unit and clean the condenser coils if they are dirty.

  3. 3

    Ensure that the outdoor fan is working correctly.

  4. 4

    If the issue persists after a reset, contact a qualified HVAC technician to inspect the compressor and electrical system.

Ver todos los códigos en este manual (58)
Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

E0E0 - Transmitting/receiving signal error in indoor unitE12E12 - Address setting conflict or auto address failureE14E14 - 3 flashes - Master/slave system wiring or SW settings error
Fuente: MHI R410A Systems
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