Mitsubishi Electronics MSZ-GA24NA operating instructions When YOU Think That Trouble has Occurred

● OPERATING INSTRUCTIONS ●

WHEN YOU THINK THAT TROUBLE HAS OCCURRED

Even if these items are checked, when the unit does not recover from the trouble, stop using the air conditioner and consult your dealer.

Symptom	Explanation & Check points
Indoor Unit
The unit cannot be operated.	• Is the breaker turned on?
	• Is the power supply plug connected?
	• Is the ON timer set?	Page 7
The unit cannot be operated	• This protects the unit according to instruc-
for about 3 minutes when	tions from the microprocessor. Please
restarted.	wait.
Mist is discharged from the air	• The cool air from the unit rapidly cools mois-
outlet of the indoor unit.	ture in the air inside the room, and it turns
	into mist.
The swing operation of the	• This is for the swing operation of the HORI-
HORIZONTAL / VERTICAL	ZONTAL / VERTICAL VANE to be performed
VANE is suspended for a	normally.
while, then restarted.
The air fl ow direction changes	• When the unit is operated in COOL or DRY
during operation.	mode, if the operation continues with air
The direction of the horizontal	blowing down for 0.5 to 1 hour, the direction
vane cannot be adjusted with	of the air fl ow is automatically set to horizon-
the remote controller.	tal position to prevent water from condensing
	and dripping.
	• In the heating operation, if the air fl ow tem-
	perature is too low or when defrosting is be-
	ing done, the horizontal vane is automatically
	set to horizontal position.
The operation is stopped for	• Defrosting of the outdoor unit is being
about 10 minutes in the heat-	done.
ing operation.	Since this is completed in max.10 minutes,
	please wait. (When the outside temperature
	is too low and humidity is too high, frost is
	formed.)
The unit starts operation by	• These models are equipped with an auto re-
itself when the main power	start function. When the main power is turned
is turned on, though it isn’t	off without stopping the unit with the remote
operated with the remote	controller and is turned on again, the unit
controller.	starts operation automatically in the same
	mode as the one set with the remote control-
	ler just before the shutoff of the main power.
	Refer to “Auto restart function”		Page 5	.
Multi system
The indoor unit which is not	• A small amount of refrigerant continues to
operating becomes warm and	fl ow into the indoor unit even though it is not
a sound, similar to water fl ow-	operating.
ing, is heard from the unit.
When heating operation is	• When operation is started during defrosting
selected, operation does not	of outdoor unit is done, it takes a few minutes
start right away.	(max. 10 minutes) to blow out warm air.
Outdoor Unit
The fan of the outdoor unit	• When the outside temperature is low dur-
does not rotate even though	ing cooling operation, the fan operates
the compressor is running.	intermittently to maintain suffi cient cooling
Even if the fan starts to rotate,	capacity.
it stops soon.
Water leaks from the outdoor	• During COOL and DRY operations, pipe or
unit.	pipe connecting sections are cooled and this
	causes water to condense.
	• In the heating operation, water condensed
	on the heat exchanger drips down.
	• In the heating operation, the defrosting op-
	eration makes water frozen on the outdoor
	unit melt and drip down.
White smoke is discharged	• In the heating operation, vapor generated
from the outdoor unit.	by the defrosting operation looks like white
	smoke.

Symptom		Explanation & Check points
Remote controller
The display on the remote	• Are the batteries exhausted?				Page 4
controller does not appear	• Is the polarity (+, -) of the				batteries			correct?
or it is dim. The indoor unit		Page 4
does not respond to the	•	Are any	buttons on the remote controller of
remote control signal.	other electric appliances being pressed?
Does not cool or heat
The room cannot be cooled	• Is the temperature setting appropriate?
or heated suffi ciently.	•	Page 5
		Is the fan setting appropriate? Please
	change fan speed to higher setting.						Page 6
	• Are the fi lters clean?			Page 8		the indoor unit
	• Is the fan or heat exchanger of
	clean?
	• Are there any obstacles blocking the air inlet
	or outlet of the indoor or outdoor unit?
	• Is a window or door open?
The room cannot be cooled	• When a ventilation fan or a gas cooker is
suffi ciently.	used in a room, the cooling load increases,
	resulting in an insuffi cient cooling effect.
	• When the outside temperature is high, the
	cooling effect may not be suffi cient.
The room cannot be heated	• When the outside temperature is low, the
suffi ciently.	heating effect may not be suffi cient.
Air does not blow out soon in	• Please wait as the unit is preparing to blow
the heating operation.	out warm air.
Airflow
The air from the indoor unit	• Are the fi lters clean?			Page 8
smells strange.	• Is the fan or heat exchanger of					the indoor unit
	clean?
	• The unit may suck in an odor adhering to the
	wall, carpet, furniture, cloth, etc. and blow it
	out with the air.
Sound
Cracking sound is heard.	• This sound is generated by the expansion/
	contraction of the front panel, etc. due to
	change in temperature.
“Burbling” sound is heard.	• This sound is heard when the outside air is
	absorbed from the drain hose by turning on
	the range hood or the ventilation fan, making
	water fl owing in the drain hose to spout out.
	This sound is also heard when the outside air
	blows into the drain hose in case the outside
	wind is strong.
Mechanical sound is heard	• This is the switching sound in turning on/off
from the indoor unit.	the fan or the compressor.
The sound of water fl owing	• This is the sound of refrigerant or condensed
is heard.	water fl owing in the unit.
Hissing sound is sometimes	• This is the sound when the fl ow of refrigerant
heard.	inside the unit is switched.

In the following cases, stop using the air conditioner and consult your dealer.

•When water leaks or drips from the indoor unit.

•When the left operation indicator lamp blinks.

•When the breaker trips frequently.

•The remote control signal is not received in a room where an electronic ON/OFF type fl uorescent lamp (inverter-type fl uorescent lamp, etc.) is used.

•Operation of the air conditioner interferes with radio or TV reception. An ampli- fi er may be required for the affected device.

•When an abnormal sound is heard.

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