Mitsubishi Heavy Industries · Air Conditioners
This error occurs when the indoor unit address was incorrectly set using the 'Master IU address set' function on the remote control. Addresses for this system should be set directly via DIP switches on the indoor unit PCB.
Click steps to track your progress.
Turn off the main power to the unit.
Locate the DIP switch SW2 on the indoor unit control PCB.
Set the indoor unit address using the DIP switches as instructed in your product manual.
Ensure the 'Master IU address set' function of the remote control is not used for this address setting.