P5414964-rev.1
17
10. Troubleshooting
10.1 This is Not Abnormal
Phenomenon Cause and Action
Stopped Operation
All indication lamps on the
remote control switch are
turned OFF.
The micro-computer is activated to protect the
device from electromagnetic waves.
The operation can be recovered if it is started from
the beginning.
“Motion Sensor is activated”
is turned ON on the remote
control switch.
The operation is stopped automatically because
the motion sensor is set as “If absent: Stop” and
it detects as absence for a period of time. (All the
indoor units connected to the same remote control
switch are stopped.)
Power failure occurs.
Start the operation from the beginning.
If the instantaneous power failure is within 2
seconds, the operation is restarted automatically.
White Steam
from Indoor Unit
During the heating operation
It may occur during the defrosting operation in the
heating operation.
White Smoke
from Indoor Unit
The heating operation is
begun to use.
The dust attached to the heat exchanger is dried.
Mist from Indoor Unit
The indoor unit is used in a
restaurant or a kitchen.
Oil is attached to the ns and the heat exchange
efciency may be decreased.
During the dry operation
It may occur when the air outlet temperature
becomes lower.
Raise the set temperature and the air ow volume.
The cooling operation is
performed in high humidity
environment.
Odor from Indoor Unit
The air ow from the indoor
unit has odor.
It may occur because the cigarette smoke and room
odor are stuck inside the indoor unit.
Ventilate well by the fan mode and clean the air
lter, the air outlet and the air inlet grille.
It may be effective for odor eliminating.
Sound from Indoor Unit
Sound is heard when starting
or stopping the operation.
It is generated because the resin parts are stretched
by the temperature change and rubbed with other
parts.
Sound which water ows or
is boiled is heard during the
operation.
It is generated because the refrigerant ows or
the drain-up mechanism drains water. Especially,
sound may be heard when starting the operation or
stopping the compressor (for approx. 3 minutes).
Growling sound may be heard
temporarily right after the air
ow volume is changed.
It is generated because the fan motor makes
temporary sound by change of fan speed.
Dew on Air Panel
Dew condensation occurs on
the air panel or the cabinet or
dew drops.
It may occur if the operation is performed in high
humidity place (relative humidity is approx. 80%.)
for a long time.
Temperature Irregularity
The air ow volume from each
air outlet and each air outlet
temperature are irregular.
The temperature irregularity occurs because of
the size of air outlet and the structure such as the
location of heat exchanger.
Turned ON “HOT-ST” on LCD
The indications may be turned ON or ash
according to the operation mode or condition.
Flashing Operation Mode on LCD
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