37MGRA FL 09 (Mismatch between the new and old platforms diagnosis and solution)

37MGRA Diagnostic Codes

Diagnostic codes covered

FL 09

Description: Indoor and outdoor units are mismatched, the LED displays this code. Please replace the matching indoor or outdoor unit.

Troubleshooting workflow

FL 09 (Mismatch between the new and old platforms diagnosis and solution) workflow
FL09 (Mismatch between the new and old platforms diagnosis and solution) workflow

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

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