Before Contacting The Service Representative, Check The Following Again; When You Think That Trouble Has Occurred - Mitsubishi Electric Mr.Slim MCF-18TN Operating Instructions Manual

BEFORE CONTACTING THE SERVICE REPRESENTA-
TIVE, CHECK THE FOLLOWING AGAIN
The air conditioner Cannot be cooled
cannot be operated. sufficiently.
d d d d d d d d d d
Check the following. Check the following.
1 Is the breaker turned 1 Is the temperature set-
on? ting correct?
2 Isn't the fuse blown? 2 Isn't the filter dirty?
3 Isn't the ON-timer set? 3 Isn't the outlet of the out-
door unit blocked?
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 operation and consult your dealer.
• 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.
• In the region where the electric wave is weak, when the air conditioner is operated, noise may be generated in radio
reception.
• When thunder is heard, stop operation and turn off the breaker. Otherwise, the electrical parts may be damaged.
Display of the remote
When a power failure
controller does not
occurs.
appear(1, 2).
The remote control To restart the unit, press
signal cannot be the ON/OFF button on the
received if the remote
remote controller again af-
controller is not
ter the restoration of the
operated near the air
power.
conditioner (1).
d d d d d
Check the following.
1 Aren't the batteries ex-
hausted?
2 Is the polarity (+, -) of
the batteries correct?

WHEN YOU THINK THAT TROUBLE HAS OCCURRED

Question
The air conditioner cannot be operated • This protects the air conditioner according to the instructions from the
for about 3 minutes when restarted. microprocessor.
Please wait.
Cracking sound is heard. • This sound is generated by the expansion/contraction of the front panel, etc.
due to change in temperature.
The room smells strange. • The air conditioner sucks in an odor adhering to the wall, carpet, furniture,
cloth, etc. and blows it out with air.
The fan stops during the DRY operation. • In DRY operation, the unit operates using the same refrigerant circuit as in
COOL operation. DRY operation time has to be reduced in order to lower
humidity without much room temperature decreasing. So the compressor
sometimes stops, and at the same time the indoor fan stops. This prevents
water condensed on the heat exchanger from evaporating again.
The sound of water flowing is heard. • This is the sound of refrigerant flowing inside the air conditioner.
• This is the sound of condensed water flowing in the heat exchanger.
• This is the sound of the heat exchanger defrosting.
The sound as burbling is heard. • This sound is heard when the outside air is absorbed 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 sufficiently. • When a ventilation fan or a gas cooker is used 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 suf-
ficient.
Mechanical sound is heard from the in- • This is the switching sound in turning on/off the fan or the compressor.
door unit.
The air flow direction is changed during • When the air conditioner is operated in the COOL or DRY mode, if the opera-
operation. tion continues with air blowing down for 1 hour, the direction of the air flow is
automatically set to position 1 to prevent condensed water from dropping.
Water leaks from the outdoor unit. • During COOL and DRY operations, pipe or pipe connecting sections are
cooled and this causes water to condense.
Answer (not a malfunction)
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