37MGRA EL 16 (Communication Malfunction Between Adapter Board and Outdoor Main Board Diagnosis and Solution)

37MGRA Diagnostic Codes

Diagnostic codes covered

EL 16

Description: The adapter PCB cannot detect the main control board. Recommended parts to prepare: Connection wires, Adapter board, Outdoor main PCB Troubleshooting and repair: NO YES NO YES

Troubleshooting workflow

EL 16 (Communication Malfunction Between Adapter Board and Outdoor Main Board Diagnosis and Solution) workflow
EL16 (Communication Malfunction Between Adapter Board and Outdoor Main Board Diagnosis and Solution) workflow

Workflow source: original 37MGRA-02SM service-manual PDF. Error-code names cross-checked against 37MGRA-04SI.

Scroll to Top