Fujitsu KL Series Operation Manual page 10

□ Is the intake grille or outlet port of indoor unit blocked?
⇒ Remove the obstructions.
□ Is the room temperature adjusted appropriately?
⇒ To change the temperature setting, refer to page 4.
□ 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 page 4.
□ <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 tem-
perature lower. (Refer to page 4.)
Humidity does not drop during the Dry operation.
□ You cannot set the target humidity in the Dry mode. If you feel
high humidity, set the temperature lower.
Airflow is weak or stops.
□ Is the fan speed set to Quiet?
⇒ To change the fan speed, refer to page 4.
□ <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 [ ] indicator blinking?
⇒In this case, the Automatic defrosting operation is working.
The indoor unit stops for maximum of 15 minutes. (Refer to page
7.)
□ <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 contrac-
tion 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 7.)
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 [ ] indicator on the indoor unit
blinking?
⇒In this case, steam may rise from the outdoor unit because of
the Automatic defrosting operation.(Refer to page 7.)
Outdoor unit emits water.
□ <In the Heating mode> The outdoor unit may emit water gener-
ated by the Automatic defrosting operation. (Refer to page 7.)
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.
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 [
NOTE: For any troubleshooting related to the wireless LAN control,
refer to the setting manual for the WLAN adapter or the mobile
app installed in your smartphone or tablet PC.
■ State of indicator lamps
: The instruction is relating to the wireless LAN control
(optional).
Lighting pattern:
State
Automatic defrosting operation
⇒ Wait until finishing the defrosting
Filter indicator
⇒ Clean the air filter and reset the filter
(3 times)
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
The power to the access point is not
on.
⇒ Check that the power to the access
(Slow)
There is a possibility that the WLAN
adapter is not properly connected to
the access point.
⇒ Disconnect the power supply to the air
The software of the WLAN adapter
is being updated.
During the air conditioner registration
(pairing of WLAN adapter)
Restricted function
■ Manual Auto operation and Filter indicator
reset
You can operate the air conditioner with
Status Length of pressing down Mode or operation
In operation More than 3 seconds
Stopping 2 seconds or less
More than 3 seconds and
less than 10 seconds
More than 10 seconds
(Only for servicing.) (*1)
*1: To stop the forced cooling, press this button or
controller.
En-10
] blink while [ ] is blinking fast.
Blinking,
Causes and solutions
(maximum of 15 minutes).
sign.
to quit the test run.
point is on.
conditioner (via breaker or plug), and
then re-connect.
on the indoor unit.
Stop
Filter indicator reset
Auto
Forced cooling
on the remote
Any state,
See
page
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