11 troublesHootinG
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.
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 fins and the heat exchange efficiency may be
decreased.
During the dry operation
It may occur when the air outlet temperature becomes lower.
raise the set temperature and the air flow volume.
The cooling operation is performed in high
humidity environment.
Odor from indoor unit
The air flow 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 filter, the flat panel,
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 flows or is boiled is
heard during the operation.
It is generated because the refrigerant flows 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 flow volume is changed.
It is generated because the fan motor makes temporary sound by
change of fan speed.
Dew on panel
Dew condensation occurs on the 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 flow 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-STArT” or "Preheating" on LCD
The indications may be turned ON or flash according to the operation
mode or condition.
Flashing operation mode on LCD
TrOUBLESHOOTING
PMML0254A rev.4 - 12/2018
19
EN
