Mitsubishi Electric · MSZ-FH Air Conditioners
The indoor and outdoor units do not operate. This indicates a problem with the wiring between the units or that the serial signal from the outdoor unit has not been received for 6 minutes. It can also occur if the indoor unit was previously connected to a non-low-standby-power model.
Click steps to track your progress.
Turn OFF the main power supply to the unit.
Ensure all wiring connections between the indoor and outdoor units are secure and correct.
If the unit was recently reconnected, clear the error history by referring to 'Deleting the memorized abnormal condition' in manual section 10-2.1.
Turn the main power supply back ON and attempt to operate the unit.
If the lamp continues to flash, contact a qualified service technician.