Before Contacting The Service Representative, Check The Following Again; When You Think That Trouble Has Occurred - Mitsubishi Electric MSC-A07YV Operating Instructions Manual

BEFORE CONTACTING THE SERVICE REPRE-
SENTATIVE, CHECK THE FOLLOWING AGAIN
Question
The air conditioner cannot • Is the breaker turned on?
be operated. • Is the fuse blown?
• Is the ON timer set? (Page 8)
The room cannot be cooled • Is the temperature setting correct? (Page 7)
or heated sufficiently. • Is the filter clean? (Page 9)
• Are there any obstacles blocking the air inlet or
outlet of the indoor or outdoor unit?
• Is a window or door open?
The air from the indoor unit • Is the filter clean? (Page 9)
smells strange.
The display on the remote • Are the batteries exhausted? (Page 5)
• Is the polarity (+, -) of the batteries correct?
controller does not appear
or it is dim. The indoor unit (Page 5)
does not respond to the re- • Are any buttons on the remote controller of other
mote control signal. electric appliances being pressed?
When a power failure oc- • Does the air conditioner start operating again?
curs. If the air conditioner had operated before the
power failure, as these models are equipped with
an auto restart function, the air conditioner
should start operating again. (Refer to Descrip-
tion of "AUTO RESTART FUNCTION" on page
6.)
Even if the above items are checked, when the air conditioner does not
recover from the trouble, stop using the air conditioner and consult your
dealer.
In the following cases, stop using the air conditioner and consult your dealer.
• When water leaks from the indoor unit.
• When the left operation indicator lamp blinks.
• When the breaker trips frequently.
• The remote control signal may not be received in a room where an electronic
ON/OFF type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.
• Operation of the air conditioner may interfere with radio or TV reception in
areas where the reception is weak. An amplifier may be required for the af-
fected device.
• When thunder is heard, stop operation and disconnect the power supply plug
or turn off the breaker. Otherwise, the electrical parts may be damaged.
10
Check points or Remedy
WHEN YOU THINK THAT TROUBLE HAS OC
Question
• This protects the air conditioner according to in-
The air conditioner cannot
be operated for about 3 min- structions from the microprocessor. Please wait.
utes when restarted.
Cracking sound is heard. • This sound is generated by the expansion/con-
traction of the front panel, etc. due to change in
temperature.
• The air conditioner may suck in an odor adher-
The air from the indoor unit
smells strange. ing to the wall, carpet, furniture, cloth, etc. and
blow it out with the air.
The fan stops during the • In DRY operation, the unit operates using the
DRY operation. same refrigerant circuit as in COOL operation.
DRY operation time has to be reduced in order
to lower humidity without much room tempera-
ture decreasing. So the compressor sometimes
stops, and at the same time the indoor fan stops.
This prevents water condensed on the heat ex-
changer from evaporating again.
The sound of water flowing • This is the sound of refrigerant flowing inside the
is heard. air conditioner.
• This is the sound of condensed water flowing in
the heat exchanger.
• This is the sound of the heat exchanger defrost-
ing.
The sound as burbling is • This sound is heard when the outside air is ab-
heard. sorbed from the drain hose in turning on the
range hood or the ventilation fan and that makes
water flowing in the drain hose spout out.
This sound is also heard when the outside air
blows into the drain hose in case the outside wind
is strong.
The room cannot be cooled • When a ventilation fan or a gas cooker is used
sufficiently. in a room, the cooling load increases, resulting
in an insufficient cooling effect.
• When the outside air temperature is high, the
cooling effect may not be sufficient.
Mist is discharged from the • The cool air from the air conditioner rapidly cools
moisture in the air inside the room, and it turns
air outlet of the indoor unit.
into mist.
Answer (not a malfunction)
The air
changes
The dire
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troller.
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door uni
White sm
from the
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for abou
heating
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times he
The room
sufficien
In a mul
indoor u
erating b
a sound
flowing,
unit.
The air
the oper
main p
though y
the unit
controlle