9
Troubleshooting
Symptom Cause / Action
Indoor unit
Noise
Sound like streaming water is heard
during operation or after operation.
• Sound of refrigerant liquid owing 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.
• The fan may rotate to dry the heat exchanger depending on
the setting.
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 conrm 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.
Outdoor unit
No operation
(When the power is turned on immediately /
When operation is stopped and resumed
immediately)
• Operation is not activated for the rst approx. 3 minutes
because the compressor protection circuit is activated.
Noise occurs during heating operation.
• Defrost operation is in process.
Steam comes out during heating operation.
The fan continues to rotate even after the
operation is stopped using the remote
controller.
• This is for smooth operation.
01_350312_EN.indb 9 2023/3/17 9:53:35
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