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Malfunction
Operation stops
▪ Check if the air filter is clogged (see
suddenly. (Operation
"13.2.2 To clean the air filter" on
lamp blinks.)
page 13).
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles, turn the breaker
OFF and back ON. If the lamp still blinks,
contact your dealer.
▪ Check if all indoor units connected to
outdoor unit in the multi-system are
operating in the same mode.
An abnormal function
▪ The air conditioner may malfunction
happens during
because of lightning or radio waves. Turn
operation.
the breaker OFF and back ON.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
14.1
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
14.1.1
Symptom: The system does not operate
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the air conditioner is in normal condition. It does not restart
immediately because one of its safety devices actuates to prevent
the air conditioner from being overloaded. The air conditioner will
turn on again automatically after 3 minutes.
▪ The air conditioner does not start immediately after the power
supply is turned on. Wait 1 minute until the microcomputer is
prepared for operation.
▪ The air conditioner does not restart immediately when the
temperature setting button is returned to its former position after
pushing. It does not restart immediately because one of its safety
devices actuates to prevent the air conditioner from being
overloaded. The air conditioner will turn on again automatically
after 3 minutes.
▪ The outdoor unit has stopped. This is because the room
temperature has reached the set temperature. The unit switches
to fan operation. "
" (external control icon) is displayed on
the user interface and the actual operation is different from the
user interface setting. For multi-split models, the microcomputer
executes the following control depending on the operation mode
of other indoor units.
▪ The fan speed is different from the setting. Pressing the fan speed
control button does not change the fan speed. When the room
temperature reaches the set temperature in heating mode or the
unit's maximum capacity is reached, the outdoor unit will stop
operation and the indoor unit will operate in fan only mode (low
fan speed). In case of multi-split, the indoor unit alternately
operates in fan stop mode and fan only mode (LL= low fan
speed). This is to prevent the cool air from being blown directly
onto anyone present in the room.
14.1.2
Symptom: White mist comes out of a unit
(Indoor unit)
▪ When humidity is high during cooling operation (in oily and dusty
places). If the interior of an indoor unit is extremely contaminated,
the temperature distribution inside a room becomes uneven. It is
FDA200+250AXVEB
Split system air conditioners
3P580564-1 – 2019.04
Measure
necessary to clean the interior of the indoor unit. Ask your dealer
for details on cleaning the unit. This operation requires a qualified
service person.
▪ When the air conditioner is changed over to heating operation
after defrost operation. Moisture generated by defrost becomes
steam and exits.
14.1.3
Symptom: Noise of air conditioners
(indoor unit)
▪ A "ringing" sound is heard after the unit is started. This sound is
generated by the temperature regulator working. It will quiet down
after about a minute.
▪ A continuous low "hissing" sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through both indoor and outdoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation. This is the noise of
refrigerant caused by flow stop or flow change.
▪ A "squeaking" sound is heard when the system is in operation or
after the stop of operation. Expansion and contraction of plastic
parts caused by temperature change makes this noise.
14.1.4
Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the unit.
14.1.5
Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
14.1.6
Symptom: The display shows "88"
This is the case immediately after the main power supply switch is
turned on and means that the user interface is in normal condition.
This continues for 1 minute.
14.1.7
Symptom: The operation stopped
suddenly (Operation lamp is on)
The air conditioner may stop for system protection due to large
voltage fluctuation. It automatically resumes operation after about 3
minutes.
14.1.8
Symptom: The outdoor fan rotates while
the air conditioner is not in operation
▪ After operation has stopped. The outdoor fan continues to
rotate for another 30 seconds for system protection.
▪ While the air conditioner is not in operation. When the outdoor
temperature is very high, the outdoor fan starts to rotate for
system protection.
14.1.9
Symptom: The heating operation stops
suddenly and a flowing sound is heard
The system is removing frost on the outdoor unit. You should wait for
about 3 to 8 minutes.
14 Troubleshooting
Installation and operation manual
15
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