Mitsubishi Electronics PE-20MYC, PE-8MYC, PE-15MYC, PE-10MYC manual Trouble shooting, Error Display

1-6.Trouble shooting

Before you ask for repair service, check the following points:

State of Machine	Remote Controller	Cause	Troubleshooting
	"ON-OFF "display is	Power failure	Press the [ON/OFF] button after power restoration.
	not lit up
		The power supply is turned OFF.	Turn the power supply ON.
It does not run	No display appears
	even when the [ON/	The fuse in the power supply is gone.	Replace fuse.
	OFF] button is
	pressed.	The earth leakage breaker is gone.	Put in the earth leakage breaker.
Air flows out but it	The liquid crystal	Improper temperature adjustment.	After checking the set temperature and inlet
			temperature on the liquid crystal display, refer to
does not cool	display shows that		[To change room temperature] on page 107, and
enough or heat	it is in the state of
			operate the adjustment button.
enough.	operation.
		The filter is filled with dust and dirt.	Clean up the filter.
		There are some obstacles at the air inlet and	Remove.
		outlet of the indoor and outdoor units.
		Windows and doors are open.	Close.
			Wait for a while.
Cool air or warm air	The liquid crystal	The restart-preventing circuit is in operation for	(To protect the compressor, a 3-minute restart-
			preventing circuit is built into the indoor unit.
does not come out.	display shows that	3 minutes.	Therefore, there are occasions sometimes when
	it is in operation.
			the compressor does not start running immedi-
			ately. There are cases when it does not run for as
			long as 3 minutes.)
		Indoor unit operation was started anew during	Wait for a while.
		the heating and defrosting operation.	(Heating operation starts after ending defrosting
		(5 10 HP only)	operation.)
Can not change	Can not change to	DIP switch1 is not correct	Change the DIP switch off to on.
to Heat mode	Heat mode when		(Refer to Instruction manual for Installation.)
	press the "MODE" key.

Error Display

Indicate	Cause	Troubleshooting
E01	Room temperature sensor open.	Automatically	reset to restoration error.
E02	Room temperature sensor short.	Automatically	reset to restoration error.
E03	Error input from Indoor unit or	Push the On-Off switch.(OFF to ON)
	Outdoor unit.

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