Mitsubishi Heavy Industries · Air Conditioners
The remote control displays E42 (while the indoor unit's green LED keeps flashing and red LED stays off). This indicates a 'current cut' event, likely due to anomalous compressor over-current or a service valve closing operation.
Click steps to track your progress.
Turn off the air conditioner at the main power breaker, wait for 15 minutes, and then turn it back on.
Ensure the outdoor unit has adequate ventilation and is not overheating due to obstructions.
If the error persists, contact a service technician to check for compressor issues, service valve status, or a faulty outdoor unit PCB.