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□ <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 off, or set the tem-
perature lower. (Refer to page 5.)
Airflow is weak or stops.
□ Is the fan speed set to Quiet?
⇒ To change the fan speed, refer to page 5.
□ 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 page 8.
□ <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 [
blinking?
In this case, the Automatic defrosting operation is working. The in-
door unit stops for maximum of 15 minutes. (Refer to page 11.)
□ <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.
Noise is heard.
□ Is the unit operating, or immediate after stopping operation?
In this case, refrigerant flowing 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 11.)
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.
Mist or steam is emitted from the unit.
□ <In the Cooling or Dry mode> A thin mist may be generated by
condensation formed with sudden cooling process.
□ <In the Heating mode> Is [
blinking?
In this case, steam may rise from the outdoor unit because of the
Automatic defrosting operation. (Refer to page 11.)
Outdoor unit emits water.
□ <In the Heating mode> The outdoor unit may emit water gener-
ated by the Automatic defrosting operation. (Refer to page 11.)
The unit operates differently from the remote controller setting.
□ Are the batteries in the remote controller exhausted?
⇒ Replace the batteries.
Operation is delayed after restart.
□ Has the power supply turned from Off to On suddenly?
In this case, the compressor will not operate for about 3 minutes
to prevent a blowout of the fuse.
Does not operate at all.
□ Is the [
] indicator on the indoor unit blinking? (Refer to
page 12.)
Refrigerant leakage sensor error and harness disconnection/con-
nection failure may have occurred.
Contact an authorized service personnel.
] indicator on the indoor unit
] indicator on the indoor unit
The unit operates differently from the remote controller setting.
□ Is the [
] indicator on the indoor unit blinking? (Refer to
page 12.)
Refrigerant may have been leaked. Blowing operation is per-
formed to prevent the refrigerant from accumulating.
Open the windows to ventilate the room and contact an authorized
service personnel.
The product starts to run on its own
□ Is the [
] indicator on the indoor unit blinking? (Refer to
State of indicator lamps.)
Refrigerant may have been leaked. Blowing operation is per-
formed to prevent the refrigerant from accumulating.
Open the windows to ventilate the room and contact an authorized
service personnel.
Immediately stop operation and turn off the electrical breaker in
following cases. Then consult authorized service personnel.
• The problem persists even if you perform these checks or
diagnostics.
• On the indoor unit, [
] and [
blinking fast.
„ State of indicator lamps
Lighting pattern:
Blinking,
State
Causes and solutions
Automatic defrosting operation
⇒ Please wait until finishing the
defrosting (maximum of 15 minutes).
Filter indicator
⇒ Clean the air filter and reset the filter
(3 times)
sign.
Error code display
⇒ Consult authorized service personnel.
(Fast)
Timer setting error because of Auto
restart
⇒ Reset the clock and timer settings.
Test run operation (for authorized
personnel only)
⇒ Press
Refrigerant leak detection
⇒ Fan operation is initiated to prevent
(10 times)
refrigerant from accumulating.
(8 times)
(Fast)
Open the windows to ventilate the
room and contact an authorized
service personnel.
* Press the
sound.
Refrigerant leakage sensor error
⇒ Sensor error may have occurred.
(4 times)
Contact an authorized service
(5 times)
(Fast)
personnel.
* The unit may resume normal operation,
however please contact an authorized
service personnel for maintenance.
Restricted function
] blink while [
] is
Any state
See
page
11
10
11
to quit the test run.
button to stop the buzzer
11
-
3
-
-
En-12
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