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

Codes de diagnostic 37MGRA

Codes de diagnostic couverts

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:

Flux de travail de dépannage

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

Contrôles diagnostiques associés

Source du flux de travail : manuel de service d'origine 37MGRA-02SM PDF. Noms des codes d'erreur recoupés avec 37MGRA-04SI.

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