Mitsubishi Electronics PUY-A24NHA2, PUZ-A42NHA2-BS Phone Calls From Customers How to Respond

Phone Calls From Customers		How to Respond	Note
The room cannot be cooled or heated sufficiently.		1 Check the set temperature of remote controller.
		The outdoor unit cannot be operated if the set
		temperature is not appropriate.
		The outdoor unit operates in the following modes.
		COOL: When the set temperature is lower
		than the room temperature.
		HEAT: When the set temperature is higher
		than the room temperature.
		2 Check if filters are not dirty and clogged. If filters
		are clogged, the airflow amount will be reduced
		and the unit capacity will be lowered. See the
		instruction manual that came with the product for
		how to clean the filters.
		3 Check there is enough space around the air
		conditioner.
		If there are any obstacles in the air intake or air outlet
		of indoor/outdoor units, they block the airflow
		direction so that the unit capacity will be lowered.
Sound	1 An gas escaping sound is heard	1 This is not a malfunction.
comes out	sometimes.	This is the sound which is heard when the flow of
from the air		refrigerant in the air conditioner is switched.
conditioner.
	2 A cracking sound is heard	2 This is not a malfunction.
	sometimes.	This is the sound which is heard when internal
		parts of units expand or contract when the
		temperature changes.
	3 A buzzing sound is heard	3 This is not a malfunction.
	sometimes.	This is the sound which is heard when the outdoor
		unit starts operating.
	4 A ticking sound is heard from	4 This is not a malfunction.
	the outdoor unit sometimes.	This is the sound which is heard when the fan
		of the outdoor unit is controlling the airflow amount
		in order to keep the optimum operating condition.
	5 A sound, similar to water	5 This is not a malfunction.
	flowing, is heard from the unit.	This is the sound which is heard when the
		refrigerant is flowing inside the indoor unit.
Something	1 The fan speed doesn’t match	1 This is not a malfunction. During the DRY
is wrong	the setting of the remote	operation, the blower’s ON/OFF is controlled by
with the	controller during DRY	the microcomputer to prevent overcooling and to
blower…..	operation.(No air comes out	ensure efficient dehumidification. The fan speed
	sometimes during DRY	cannot be set by the remote controller during DRY
	operation.)	operation.
	2 The fan speed doesn’t match	2 This is not a malfunction.	The up/down vane will be
	the setting of the remote	1) When the HEAT operation starts, to prevent the	automatically set to
	controller in HEAT operation.	unit from blowing cold air, the fan speed is	horizontal blow in these
		gradually increased from 0 to the set speed,	cases listed up on the left
		in proportion to the temperature rise of the	(1)~3)). After a while, the
		discharged air.	up/down vane will be
		2) When the room temperature reaches the set	automatically moved
		temperature and the outdoor unit stops,	according to the setting of
		the unit starts the LOW AIR operation.
			the remote controller.
		3) During the HEAT operation, the DEFROST
		operation is performed to defrost the outdoor
		unit. During the DEFROST operation, the
		fan is stopped to prevent cold air coming
		out of the indoor unit.

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