En-5
TROUBLESHOOTING
WARNING
In following events, immediately stop operation of
the air conditioner, and disconnect all the power
supply by turning off the electrical breaker or
disconnecting the power plug. Then consult your
dealer or authorized service personnel.
As long as the unit is connected to the power supply,
it is not insulated from the power supply even if the
unit is turned off.
• Unit smells of something burning or emits smoke
• Water leaks from the unit.
Does not operate at all.
Has there been a power outage?
In this case, the unit restarts automatically after the
power supply is resumed. (Refer to
page 4
.)
Has the circuit breaker been turned off?
Turn on the circuit breaker.
Has a fuse blown out or the circuit breaker been
tripped?
Replace the fuse or reset the circuit breaker.
Is the timer operating?
To check or deactivate the timer setting, Refer to the
operation manual of the remote controller.
<When using the wireless LAN control> Is the WLAN
adapter in a
fi
rmware update?
During the
fi
rmware update of the WLAN adapter, you
cannot operate the air conditioner from the mobile app.
Operate from the remote controller or wait until the
update is complete (for a maximum of 5 minutes).
<When using the wireless LAN control> Is the indoor
unit in a
fi
rmware update?
During the
fi
rmware update of the indoor unit, the air
conditioner stops the operation. Wait until the update is
complete. (for a maximum of 30 minutes).
Poor cooling or heating performance.
Is the unit operating under the conditions except the
permissible temperature range?
In this case, the air conditioner may stop because of the
automatic protection circuit working.
Is the air
fi
lter dirty?
Clean the air
fi
lter. (Refer to
page 2
.)
Is the intake grille or outlet port of indoor unit blocked?
Remove the obstructions.
Is the room temperature adjusted appropriately?
To change the setting temperature, refer to the
operation manual of the remote controller.
Is a window or door left opened?
Close the window or the door.
Is the fan speed set to Quiet?
To change the fan speed, refer to the operation
manual of the remote controller.
<In the Cooling mode> Is direct or strong sunlight
shining into the room?
Close the curtains.
<In the Cooling mode> Are there other heating apparatus
or computers operating, or too many people in the
room?
Turn the heating apparatus or computers off, or set
the temperature lower.
Is the air conditioner in Economy mode?
Air
fl
ow is weak or stops.
Is the fan speed set to Quiet?
To change the fan speed, refer to the operation
manual of the remote controller.
Has the Fan control for energy saving set? In this case,
the indoor unit fan may stop temporarily while the
Cooling operation.
To cancel the Fan control for energy saving, refer to
the operation manual of the remote controller.
* This function cannot be deactivated when the fan
speed is set to Auto.
<In the Heating mode> Have you just started the
operation?
In this case, the fan rotates at very low speed temporarily
to warm up the internal parts of the unit.
<In the Heating mode> Is the room temperature higher
than the set temperature?
In this case, the outdoor unit stops and the indoor unit
fan rotates at very low speed.
<In the Heating mode> Is the Automatic defrosting
operation working? In this case, the indoor unit stops for
maximum of 15 minutes. (Refer to
page 3
.)
<In the Dry mode> The indoor unit operates at low fan
speed to adjust the room humidity, and may stop from
time to time.
<In the Auto mode> While the monitoring operation, the
fan rotates at very low speed.
Humidity does not drop.
<In the Dry operation> If the setting temperature is high,
the humidity may not drop.
To lower the humidity, lower the setting temperature.
Noise is heard.
Is the unit operating, or immediate after stopping
operation?
In this case, refrigerant
fl
owing sound may be heard.
It may be particularly noticeable for 2-3 minutes after
starting operation.
<In the Heating mode> Do you hear a sizzling sound?
This sound is produced by the Automatic defrosting
operation.(Refer to
page 3
.)
Smell coming from the unit.
The air conditioner may absorb various smells generated
from interior textile, furniture, or cigarette smoke. These
smells may be emitted during the operation.
01_OM_9381067244-01_EN.indd 5
01_OM_9381067244-01_EN.indd 5
3/12/2564 BE 16:56
3/12/2564 BE 16:56
