Mitsubishi Electric Mr.Slim MSZ-FD09NA Operating Instructions Manual page 11

Even if these items are checked, when the unit does not recover from the
troub e, stop us ng the a r cond t oner and consu t your dea er.
The horizontal vane does not
move,
The unit cannot be operated
for about 3 minutes when
restarted,
Mist is discharged from the air
outlet of the indoor unit,
The swing operation of the
HORIZONTAL VANE is
suspended for a while, then
restarted.
The air flow direction changes
during operation.
The direction of the horizontal
vane cannot be adjusted with
the remote controller.
The operation is stopped for
about 10 minutes in the heat-
ing operation.
The unit starts operation by
itself when the main power
is turned on, though it isn't
operated with the remote
controller.
• Is the power supply plug connected?
• Is the ON timer set?
• Are the horizontal vane and the vertical vane
installed correctly? _
• This protects the unit according to instruc-
tions from the microprocessor. Please
wait.
• The cool air from the unit rapidly cools mois-
ture in the air inside the room, and it turns
into mist.
• This is for the swing operation of the HORI-
ZONTAL VANE to be performed normally.
• When the unit is operated in COOL or DRY
mode, if the operation continues with air
blowing down for 0.5 to 1 hour, the direction
of the air flow is automatically set to position
(1) to prevent water from condensing and
dripping.
• In the heating operation, if the air flow
temperature is too low or when defrosting is
being done, the horizontal vane is automati-
cally set to horizontal position.
• Defrosting of the outdoor unit is being
done.
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.)
• These models are equipped with an auto re-
start function. When the main power is turned
off without stopping the unit with the remote
controller and is turned on again, the unit
starts operation automatically in the same
mode as the one set with the remote control-
lerjust before the shutoff of the main power.
Refer to "Auto restart function".
The fan of the outdoor unit
does not rotate even though
the compressor is running.
Even if the fan starts to rotate,
it stops soon.
Water leaks from the outdoor
unit.
The indoor unit which is not • A small amount of refrigerant continues to
operating becomes warm and flow into the indoor unit even though it is
a sound, similar to water flow- not 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.
• When the outside temperature is low dur-
ing cooling operation, the fan operates
intermittently to maintain sufficient cooling
capacity.
• During COOL and DRY operations, pipe or
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.
The display on the remote • Are the batteries exhausted?
controller does not appear • Is the polarity (+, -) of the batteries correct?
or it is dim. The indoor unit
does not respond to the • Are any buttons on the remote controller of
remote control signal, other electric appliances being pressed?
• Is the temperature setting appropriate?
The room cannot be cooled
or heated sufficiently.
• Is the fan setting appropriate? Please
change fan speed to higher setting.
• Are the filters clean?
• Is the fan or heat exchanger of the indoor unit
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
sufficiently, used in a room, the cooling load increases,
resulting in an insufficient cooling effect.
• When the outside temperature is high, the
cooling effect may not be sufficient.
The room cannot be heated • When the outside temperature is low, the
sufficiently, heating effect may not be sufficient.
Air does not blow out soon in • Please wait as the unit is preparing to blow
the heating operation, out warm air.
The air from the indoor unit • Are the filters clean?
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.
so
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 flowing 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 flowing • This is the sound of refrigerant or condensed
is heard, water flowing in the unit.
Hissing sound is sometimes • This is the sound when the flow 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 POWER lamp blinks.
• When the breaker trips frequently.
• The remote control signal is not received in a room where an electronic ON/OFF
type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.
• Operation of the air conditioner interferes with radio or TV reception. An ampli-
tier may be required for the affected device.
• When an abnormal sound is heard.
En-lO