Error code

Mitsubishi Electric PEFY code 0403

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Meaning

Serial communication error (Indoor unit): Serial communication cannot be established between the Indoor controller board and the INV board.

Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.

(1) Faulty wiring Check the following (1) Between Indoor (2) Between Power (2) INV board failure If the error persists

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