Instruction Manual

En-7
11. TROUBLESHOOTING
WARNING
In following events, immediately stop operation of the
air conditioner, and disconnect all the power supply by
turning o󰀨 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 o󰀨.
• 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 5.)
□ Has the circuit breaker been turned o󰀨?
⇒ 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
rmware update?
During the 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
rmware update?
During the rmware update of the indoor unit, the air conditioner
stops the operation. Wait until the update is complete. (for a maxi-
mum 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 lter dirty?
⇒ Clean the air lter. (Refer to page 5.)
□ 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 com-
puters operating, or too many people in the room?
⇒ Turn the heating apparatus or computers o󰀨, or set the
temperature lower.
Air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 opera-
tion 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 5.)
□ <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.
□ <In multi-split connection> Are multiple units set in di󰀨erent opera-
tion mode as shown below?
In this case, the units set afterward will stop and [
] indicator will
blink.
• Heating mode and other mode
Airow direction does not change according to the setting or
does not change at all.
□ <In the Auto mode> In the Auto mode, the airow direction is set
automatically.
□ <In the Heating mode> Have you just started the operation?
In this case, the airow direction keeps the default position for a
while.
□ <In the Heating mode> During the Automatic defrosting operation,
the airow direction is set automatically.
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 owing sound may be heard. It may be
particularly noticeable for 2-3 minutes after starting operation.
□ Do you hear a slight squeaking sound during the operation?
This sound is produced by the minute expansion and contraction
of the front panel caused by temperature change.
□ <In the Heating mode> Do you hear a sizzling sound?
This sound is produced by the Automatic defrosting operation.
(Refer to page 5.)
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.