36
P5417089
8.
Troubleshooting
8.1 This is Not Abnormal
Phenomenon
Cause and Action
Operation Stopped
All indication lamps on the
wired controller are turned
OFF.
The micro-computer is activated to protect the
device from electromagnetic waves. Restart the
operation.
After Power Failure
Restart the operation. If the instantaneous power
failure is within two seconds, the operation restarts
automatically.
White Steam
from Indoor Unit
During Heating Operation
Dust attached to the heat exchanger has dried.
White Smoke
from Indoor Unit
At Beginning of Heating
Operation Season
This might occur when dust attached to the heat
exchanger has dried.
Mist from Indoor Unit
In Restaurant or Kitchen
This might occur when oil attached to the fins might
decrease the heat exchange efficiency.
During Dry Operation
This might occur when the air outlet temperature
becomes lower. Change the operation mode.
During Cooling Operation
in Humid Environment
This might occur when the air outlet temperature
becomes lower.
Raise the set temperature and the air flow volume.
Odor from Indoor Unit
Odor Discharged from
Indoor Unit
This might occur when the smell of cigarette smoke
infiltrated the inside of the indoor unit.
Ventilate the unit well in the fan mode and clean the
air filter, the air outlet and the air inlet grille.
Sound from Indoor Unit
Grate is heard when starting
or stopping the operation.
This is the sound made when the components are
rubbing against each other due to the extension
and contraction of the resin parts caused by the
temperature change.
Sound of water flowing or
bubbling during the operation.
This is the sound made when the refrigerant flows
or the drain-up mechanism drains water. The
sound may be heard especially 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.
Condensation on
Front Panel
Condensation on front panel
or cabinet or condensation
drips
This might occur when the operation is performed
in humid location (relative humidity is approximately
80%) over a prolonged period of time.
Temperature Irregularity
The air flow volume and
temperature of each air outlet
are irregular.
This might occur for structural reasons, such as the
size of air outlet and the location of heat exchanger.
“HOT-START” on LCD Turned ON
This might occur according to the operation mode
or operation conditions.
Operation Mode on LCD Flashing
