Mitsubishi Electric · City Multi Air Conditioning Systems
This error indicates that two or more units (such as outdoor, indoor, Fresh Master, Lossnay, or remote controllers) within the air conditioning system have been assigned the same address. This prevents proper communication.
Click steps to track your progress.
Turn off the power to the entire system at the main circuit breaker.
Review the address settings for all components in the system (outdoor, indoor, Fresh Master, Lossnay, remote controllers).
Ensure each component has a unique address assigned according to the installation manual.
Restore power to the system.
If the error persists, consult the installation manual for detailed addressing procedures or contact a qualified technician.