Mitsubishi Electronics PUY-A42NHA2-BS Before repair Frequent calling from customers, Action Table

• Before repair

Frequent calling from customers

Phone Calls From Customers	How to Respond	Note
Unit does 1 The operating display of remote	1 Check if power is supplied to air conditioner.
not operate controller does not come on.	Nothing appears on the display unless power is
at all.	supplied.

2Unit cannot be restarted for a 2 Wait around 3 minutes to restart unit.

	while after it’s stopped.	The air conditioner is in a state of being protected
		by the microcomputer’s directive. Once the
		compressor is stopped, the unit cannot be
		restarted for 3 minutes. This control is also applied
		when the unit is turned on and off by remote
		controller or thermostat.
	3 Error code appears and blinks	3 Error code will be displayed if any protection	Refer to “SELF-DIAGNOSIS
	on the display of remote	devices of the air conditioner are actuated.	ACTION TABLE”.
	controller.	What is error code?	Check if servicing is
			required for the error.
Remote	1 “PLEASE WAIT” is displayed	1 Wait around 2 minutes.
controller	on the screen.	An automatic startup test will be conducted for
		2 minutes when power is supplied to the air
		conditioner. “PLEASE WAIT” will be kept being
		displayed while that time.

2“FILTER” is displayed on the 2 This indicates that it is time to clean the air filters. Display time of “FILTER”

screen.	Clean the air filters. Press the FILTER button on	depends on the model.
	the remote controller twice to clear “FILTER” from Long life filter: 2500 hrs.
	the display.	Regular filter: 100 hrs.
	See the operation manual that came with the
	product for how to clean the filters.

3“STANDBY” is displayed on the 3 This is displayed when the unit starts HEAT

screen.	operation, when the thermostat puts the
	compressor in operation mode, or when the
	outdoor unit ends DEFROST operation and
	returns to HEAT operation.
	The display will automatically disappear around
	10 minutes later.
	While “STANDBY” is displayed on the remote
	controller, the airflow amount will be restricted
	because the indoor unit’s heat exchanger is not
	fully heated up. In addition to that, the up/down
	vane will be automatically set to horizontal blow
	in order to prevent cold air from directly blowing
	out to human body. The up/down vane will return
	to the setting specified by the remote controller
	when “STANDBY” is released.

4“DEFROST” is displayed on 4 The outdoor unit gets frosted when the outside

the screen. (No air comes out of	temperature is low and the humidity is high.
the unit.)	“DEFROST” indicates the DEFROST operation
	is being performed to melt this frost. The
	DEFROST operation ends in around 10 minutes
	(at most 15 minutes).
	During the DEFROST operation, the indoor unit’s
	heat exchanger becomes cold, so the blower is
	stopped. The up/down vane will be automatically
	set to horizontal blow in order to prevent cold air
	from directly blowing out to human body. The
	display will turn into “STANDBY” when DEFROST
	operation ends.

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