Mitsubishi Electric · City Multi Air Conditioning Systems
This error occurs when the total capacity of all connected indoor units exceeds the system's specified limit. It can also be triggered by incorrect registration of the outdoor unit's model name.
Click steps to track your progress.
Check the installation manual to ensure the total capacity of all indoor units connected does not exceed the maximum allowed for your outdoor unit.
Verify that the outdoor unit's model name code has been correctly registered in the system.
Consult with your installer to review the system design and capacity calculations.
If recent changes were made to indoor units, ensure they are compatible with the outdoor unit.
A system reset might clear temporary registration glitches, but the underlying capacity mismatch would need to be addressed.