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EH 3A

37MUHA Fault Codes EH bA, EH 3A, EH 3b – Indoor Fan Communication and DC Bus Voltage

37MUHA Fault Codes / By Carrier Enterprise

The indoor fan module communication or DC bus voltage is abnormal.

37MUHA Fault Codes EH bA, EH 3A, EH 3b – Indoor Fan Communication and DC Bus Voltage Read More »

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

37MGRA Diagnostic Codes / By Carrier Enterprise

Troubleshooting workflow for EH BA, EH 3A, EH 3B.

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 Read More »

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