11
Troubleshooting
Symptom
Cause / Action
Indoor unit
Noise
Sound like streaming water is heard
during operation or after operation.
• Sound of refrigerant liquid flowing inside unit
• Sound of drainage water through drain pipe
Cracking noise is heard during operation
or when operation stops.
• Sound due to temperature changes of parts
Discharged air smells during operation.
• Indoor odor components, cigarette odor and cosmetic odor
accumulated in the air conditioner and its air is discharged.
• The unit inside is dirty.
(Contact your dealer.)
Dewdrops accumulate near the air outlet
during cooling operation.
• Internal moisture is cooled by cool wind and accumulates as
dewdrops.
Fog occurs during cooling operation.
• If the air conditioner has been installed at places such as
restaurants where large amounts of oil mist exist, cleaning is
necessary because the unit inside (heat exchanger) is dirty.
(Contact your dealer.)
Fog occurs during heating operation.
• Defrost operation is in process.
The fan is rotating for a while even though
operation stops.
• Fan rotation makes operation smooth.
• The fan may rotate to dry the heat exchanger depending on
the setting.
The indoor unit fan is running and does
not stop when ON/OFF operation button on
remote controller is pressed.
• The refrigerant may be leaking. If R32 refrigerant leakage
detection sensor is connected and the refrigerant leaks, P08
alarm and inspection mark will be displayed on the remote
controller and the fan will automatically operate. Please
ventilate the room without turning off the earth leakage circuit
breaker and contact the service dealer for assistance.
• Are you using gas equipment (propane, butane, methane, etc.)
and sprays near R32 refrigerant leakage detection sensor?
R32 refrigerant leakage detection sensor could lead to false
detection and the fan may start rotating. Please contact the
service dealer for assistance.
Airflow
direction
Airflow direction changes while operating.
Airflow direction cannot be set.
Airflow direction cannot be changed.
• When air discharge temperature is low during heating
operation, or during defrost operation, horizontal wind flow is
made automatically.
• The flap position may be set individually.
(Type U2)
Dust is discharged.
• Dust accumulated inside the indoor unit is discharged.
At the initial high-speed operation, the fan
sometimes rotates faster than the setting
speed.
(3 to 30 minutes)
• This is for operation check in order to confirm whether the fan
motor rotation is within the range of use.
Humming noise comes out.
• This is the sound of nanoe™ X being discharged.
is not displayed on the remote
controller.
• Has nanoe™ X been set to OFF?
→ Set to ON.
is displayed on the remote
controller.
• nanoe™ X is considered abnormal.
(Contact your dealer.)
Check before consulting or requesting services.
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