When You Think That Trouble Has Occurred - Mitsubishi Electric Trane NTYWST09A112A Series 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 vanes installed correctly?
move. • Is the fan guard deformed?
The unit cannot be operated • This protects the unit according to instructions from
for about 3 minutes when the microprocessor. Please wait.
restarted.
Mist is discharged from the air • The cool air from the unit rapidly cools moisture
outlet of the indoor unit. in the air inside the room, and it turns into mist.
The swing operation of the • This is for the swing operation of the HORIZON-
HORIZONTAL VANE is TAL VANE to be performed normally.
suspended for a while, then
restarted.
The airfl ow direction changes • When the unit is operated in COOL or DRY mode,
during operation. if the operation continues with air blowing down
The direction of the horizontal for 0.5 to 1 hour, the direction of the air fl ow is
vane cannot be adjusted with automatically set to upward position to prevent
the remote controller. water from condensing and dripping.
The unit starts operation by • These models are equipped with an auto re-
itself when the main power is start function. When the main power is turned
turned on, but hasn't received off without stopping the unit with the remote
sign from the remote controller. controller and is turned on again, the unit
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 uence of
time. some factors such as ultraviolet light and tempera-
ture, this has no effect on the product functions.
Outdoor Unit
The fan of the outdoor unit • When the outside temperature is low during cool-
does not rotate even though ing operation, the fan operates intermittently to
the compressor is running. 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 pipe
unit. connecting sections are cooled and this causes
water to condense.
Remote controller
The display on the remote • Are the batteries exhausted?
controller does not appear or it • Is the polarity (+, -) of the batteries correct?
is dim. The indoor unit does not Page 4
respond to the remote control • Are any buttons on the remote controller of other
signal. electric appliances being pressed?
En-9
Explanation & Check points
Page 7
page 5 .
Page 4
Symptom
Does not cool
The room cannot be cooled • Is the temperature setting appropriate?
suffi ciently. Page 5
• 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 temperature, and
the like.
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/con-
traction of the front panel, etc. due to change in
temperature.
"Burbling" sound is heard. • This sound is heard when the outside air is ab-
sorbed 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 the
from the indoor unit. fan or the compressor.
The sound of water fl owing is • This is the sound of refrigerant or condensed water
heard. fl owing in the unit.
Hissing sound is sometimes • This is the sound when the fl ow of refrigerant inside
heard. the unit is changed.
In the following cases, stop using the air conditioner and consult your dealer.
• When water leaks or drips from the indoor unit.
• When the upper 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 amplifi er may
be required for the affected device.
• When an abnormal sound is heard.
• When any refrigerant leakage is found.
Explanation & Check points
Page 6
Page 8
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