37MGRA EH bA (Communication Malfunction Between Indoor Unit and External Fan Module)/ EH 3A(External Fan DC Bus Voltage Is Too Low Protection)/ EH 3b (External Fan DC Bus Voltage is Too High) Fault) Diagnosis and Solution

Códigos de diagnóstico 37MGRA

Códigos de diagnóstico cubiertos

EH BA, EH 3A, EH 3B

  • EH BA – Communication Error Between the Indoor Unit and External Fan Module
  • EH 3A – External Fan DC Bus Voltage Too Low Protection
  • EH 3B – External Fan DC Bus Voltage Too High Fault

Description: Indoor unit does not receive the feedback from external fan module during 150 seconds. or Indoor unit receives abnormal increases or decreases in voltage from external fan module. Recommended parts to prepare: Indoor main PCB Troubleshooting and repair:

Flujo de solución de problemas

EH bA (Communication Malfunction Between Indoor Unit and External Fan Module)/ EH 3A(External Fan DC Bus Voltage Is Too Low Protection)/ EH 3b (External Fan DC Bus Voltage is Too High) Fault) Diagnosis and Solution workflow
EHbA (Communication Malfunction Between Indoor Unit and External Fan Module)/ EH3A(External Fan DC Bus Voltage Is Too Low Protection)/ EH3b (External Fan DC Bus Voltage is Too High) Fault) Diagnosis and Solution workflow

Pruebas de diagnóstico relacionadas

Fuente del flujo de trabajo: manual de servicio original 37MGRA-02SM PDF. Nombres de códigos de error contrastados con 37MGRA-04SI.

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