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Christopher JohnsonAug 11, 2025
What to do if Mitsubishi Electric PKH18FK1 Air Conditioner remote controller display does not appear despite turning POWER switch ON?
- PPatricia CooperAug 11, 2025
First, measure the voltage between the terminals of the remote controller. If there's no voltage, remove the terminals and measure the voltage between the wires. If the voltage is between 6VDC and 12V, the remote controller is damaged and should be replaced. Otherwise, check for a short circuit in the transmission wire, bad contact at indoor CN40, whether CN40 is attached to a sub unit, a damaged transformer, bad contact at CN4T, a broken fuse, or if the circuit breaker is OFF. If all these points are normal, replace the indoor controller board.