A0 (6600) - Duplex address error (M-NET Remote controller)

What does A0 mean?

The M-NET remote controller for the Mitsubishi Electric PUMY Air Conditioner has detected a duplex address error, indicating a conflict where two or more devices on the M-NET network have the same address. This applies only to M-NET remote controllers.

• Incorrect M-NET addressing settings during installation or configuration
• Two or more connected devices assigned the same address

Click steps to track your progress.

1. 1

   Note the error code displayed on the M-NET remote controller.

2. 2

   Power off the Mitsubishi Electric PUMY Air Conditioner system at the main electrical breaker.

3. 3

   Wait for at least 30 seconds, then restore power to the system.

4. 4

   If the error persists, consult the installation manual for M-NET address settings and verify unique addresses for all connected components. Contact a qualified service technician if the issue cannot be resolved.