Fujitsu ASY20UI-KGTB Operation Manual page 13

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 filter dirty?
⇒ Clean the air filter. (Refer to page 9.)
□ 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 5.
□ 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 5.
□ Has the Outdoor Unit Low Noise operation been set?
⇒ To stop the Outdoor Unit Low Noise operation, refer to page 8.
□ <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 off, or set the
temperature 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 [ ] indicator blinking?
In this case, the Automatic defrosting operation is working. The in-
door unit stops for maximum of 15 minutes. (Refer to page 10.)
□ <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 10.)
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 10.)
Outdoor unit emits water.
□ <In the Heating mode> The outdoor unit may emit water gener-
ated by the Automatic defrosting operation. (Refer to page 10.)
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 [
NOTES: For any troubleshooting related to the W-LAN control, refer
to the setting manual for W-LAN adapter or the mobile app
installed in your smartphone or tablet PC.
■ State of indicator lamps
Lighting pattern: Off, On,
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
sign.
(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
Restricted function
(In multi connection) Standby mode
⇒ Check the set operation mode of the
indoor units.
(Slow)
(Slow)
■ Manual Auto operation and Filter indicator
reset
You can operate the air conditioner with
indoor unit.
Status Time to keep pressing
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) In multi connection, the operation mode follows the other indoor
units.
*2) To stop the forced cooling, press this button or
controller.
] blink while [ ] is blinking fast.
Blinking, Any state
See
page
to quit the test run.
on the
Mode or operation
Stop
Filter indicator reset
Auto *1)
Forced cooling
)
*2)
on the remote
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