9 TROUBLESHOOTING
This is not abnormal
Phenomenon
Cause and Action
Operation Stopped
All indication lamps on the remote control
switch are turned OFF.
The micro-computer is activated to protect the device from
electromagnetic waves. Restart the operation.
“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.)
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
This might occur during the defrosting operation in the
heating operation.
White Smoke from Indoor Unit
At Beginning of Heating Operation Season
This might occur when dust attached to the heat exchanger
has been 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.
During Frost/Wash Operation
This might occur when frost is formed on the heat exchangers
fins
Odor from Indoor Unit
Odor Discharged Air from Indoor Unit
This might occur when the smell of cigarette smoke or room
stuck to 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 flat 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 burbling 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 approx. 3 minutes).
Sound of something cracking is heard at the
beginning of operation.
This is the sound made when water attached to the heat
exchanger partly freezes or melted during cooling operation.
Buzz is heard during Power-ON
This is the sound made when the noise occurs at the
electrical parts.
Dew Condensation on Air
Panel
Dew condensation on Air Panel or Cabinet or
Dew Drops
This might occur when the operation is performed in humid
place (relative humidity is approx 80%) for a long time.
Dew condensation on Air Panel or Cabinet
during or after FrostWash
This might occur when the operation is performed in humid
place (relative humidity is approx. 80%) and high temperature
place (higher than 30ºC).
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.
Turned ON “HOT-START” or “Preheating” on LCD
This might occur according to the operation mode or
operation conditions.
Operation Mode on LCD Flashing
TROUBLESHOOTING
PMML0549 rev.1 - 02/2021 - A10761230A
8
Summary of Contents for RCD-2.0FSR
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