When You Think That Trouble Has Occurred - Mitsubishi Electric MSY-GS18NA Operating Instructions Manual

● OPERATING INSTRUCTIONS ●
W
HEN 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
Indoor Unit
The unit cannot be operated. • Is the breaker turned on?
• Is the power supply plug connected?
• Is the ON timer set?
The horizontal vane does not • Are the horizontal vane and the vertical vane
move. installed correctly?
• Is the fan guard deformed?
The unit cannot be operated • This protects the unit according to instruc-
for about 3 minutes when tions from the microprocessor. Please wait.
restarted.
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 upward
the remote controller. 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 stops for about • Outdoor unit is in defrost.
10 minutes in the heating Since this is completed in max.10 minutes,
operation. please wait. (When the outside temperature
is too low and humidity is too high, frost is
formed.)
<MSZ (Heat pump)>
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".
The indoor unit discolors over • Although plastic turns yellow due to the infl u-
time. ence of some factors such as ultraviolet light
and temperature, this has no effect on the
product functions.
Outdoor Unit
The fan of the outdoor unit • When the outside temperature is low during
does not rotate even though cooling operation, the fan operates intermit-
the compressor is running. tently to maintain suffi cient cooling capacity.
Even if the fan starts to rotate,
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
operation makes ice forming 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.
<MSZ (Heat pump)>
Remote controller
The display on the remote • Are the batteries exhausted?
controller does not appear or
• Is the polarity (+, -) of the batteries correct?
it is dim. The indoor unit does Page 4
not respond to the remote • Are any buttons on the remote controller of
control signal. other electric appliances being pressed?
En-13
Explanation & Check points
Page 9
Page 11
Page 4
Symptom
Does not cool or heat
The room cannot be cooled • Is the temperature setting appropriate?
or heated suffi ciently. Pages 5, 6
• Is the fan setting appropriate? Please change
fan speed to High or Super High.
• Are the fi lters 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?
• When a ventilation fan or a gas cooker is
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.
• It may take a certain time to reach the setting
temperature or may not reach that depending
on the size of the room, the ambient tempera-
ture, and the like.
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.
Airfl ow
The air from the indoor unit • Are the fi lters 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.
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.
Timer
Weekly timer does not operate • Is the ON/OFF timer set?
according to settings.
• Transmit the setting information of the weekly timer
to the indoor unit again. When the information is
successfully received, a long beep will sound from
the indoor unit. If information fails to be received,
3 short beeps will be heard. Ensure information is
successfully received.
• When a power failure occurs and the main power
turns off, the indoor unit built-in clock will be
incorrect. As a result, the weekly timer may not
work normally.
Be sure to place the remote controller where
the signal can be received by the indoor unit.
Page 3
The unit starts/stops the opera- • Is the weekly timer set?
tion by itself.
Explanation & Check points
Page 7
Page 12
Page 12
Pages 9, 10
Pages 9, 10
Pages 9, 10