30
P5417055
8.
Troubleshooting
8.1 This is Not Abnormal
Phenomenon
Cause and Action
Operation Stopped
All indicator LEDs on the
wired controller are turned
OFF.
The micro-computer is activated to protect the
device from electromagnetic interference. Restart
the operation.
“Motion Sensor ON” is turned
ON the wired controller.
The operation has stopped automatically because
the motion sensor is set as “If absent: Stop” and it
detects an absence of motion for a period of time. (All
indoor units connected to the same controller are
stopped.)
After Power Failure
Restart the operation. If the instantaneous power
failure is within 2 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
Season
This might occur when dust attached to the heat
exchanger has dried.
Mist from Indoor Unit
In Restaurant or Kitchen
This can occur when oily residue coats the fins and
heat exchanger efficiency is degraded.
During Dry Operation
This might occur due to the air outlet temperature
decreasing. Change the operation mode.
During Cooling Operation
in Humid Environment
This might occur due to the air outlet temperature
decreasing. Raise the set temperature and airflow
volume.
Odor from Indoor Unit
Odors Emanating from Indoor
Unit Air Dischagre
The intake of cigarette smoke is the likely reason,
with nicotine deposits coating or clogging the cells
and surfaces of the air filter.
Ventilate the unit well in fan mode and clean the air
filter, the air outlet and air inlet grill.
Sound from Indoor Unit
A grating sound is heard
when starting or stopping the
operation.
This is the sound made when the components
are rubbing up against one another due to the
expansion and contraction of plastic formed parts
brought on by temperature change.
Sound of water flowing or
bubbling is heard 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 approximately 3
minutes).
A growling sound may be
heard temporarily right after
the airflow volume is changed.
It is generated because the fan motor makes
temporary sound by change of fan speed.
Dew Condensation on
Decorative Panel
Dew condensation on
Decorative Panel or Cabinet
or Dew Drops
This might occur when the operation is performed
in a humid environment over a prolonged period of
time (relative humidity around 80%).
Temperature Irregularity
Airflow volume and
temperature irregularities exist
for each outlet.
This might occur for structural reasons, such as
the size of an air outlet and the location of heat
exchanger.
“HOT-START” on LCD Illuminated (ON)
This might occur according to the operation mode
or operational conditions.
Operation Mode on LCD Flashing
