Mitsubishi Electronics PUZ-A36NHA2, PUZ-A42NHA2-BS, PUZ-A30NHA2 Check if there is breaking

Symptoms: Nothing is displayed on the remote controller 3

LED display of the indoor controller board

LED1 :

LED2 : or

LED3 : —

Diagnosis flow	Cause	Inspection method and
		troubleshooting

Check the voltage of the terminal block (TB6) of the remote controller.

DC 10V to DC 16V?	YES	• Defective	• Replace the
		remote controller	remote controller.
NO
Check the status	Lighting	• Breaking or poor	• Check if there is breaking
of the LED2.
		contact of the remote	or poor contact of the
		controller wire	remote controller wire.
Blinking			Check the voltage of the
			terminal block (TB5)
Check the status of the LED2			connecting the remote
			controller wire.
after disconnecting the remote			If it is not between DC 10V
controller wire from the terminal			and DC16V, the indoor
block (TB5) of the indoor unit.			controller board must be
			defective.
Check the status	Lighting	• The remote controller	• Check if the remote
of the LED2.
		wire short-circuits	controller wire is
Blinking			short-circuited.
		• Defective indoor	• Replace the indoor
		controller board	controller board.

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