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7 Troubleshooting
Operation manual
11
FTXP20~71L2V1B
R32 split series
3P511999-1C – 2018.01
Malfunction Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does NOT properly work.
Turn OFF the main power
switch.
If water leaks from the unit. Stop the operation.
The operation switch does NOT work
well.
Turn OFF the power
supply.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
Notify your installer and
report the malfunction
code.
If the system does NOT properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
Malfunction Measure
If the system does
NOT operate at all.
Check if there is no power failure. Wait
until power is restored. If a power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
Check the batteries of the user interface.
The system suddenly
stops operating.
Check if the air inlet or outlet of the
outdoor or indoor unit is NOT blocked by
obstacles. Remove any obstacles and
make sure the air can flow freely.
The air conditioner may stop operating
after sudden large voltage fluctuations to
protect the system. It automatically
resumes operation after about 3minutes.
The system operates,
but cooling or heating
is insufficient.
Check the airflow rate setting. Refer to
"4.3.2Airflow rate"on page5.
Check the temperature setting. Refer to
"4.3.1 To start/stop operation and to set
the temperature"on page5.
Check if the airflow direction setting is
appropriate. Refer to "4.3.3 Airflow
direction"on page6.
Check if the air inlet or outlet of the
outdoor or indoor unit is NOT blocked by
obstacles. Remove any obstacles and
make sure the air can flow freely.
The system operates,
but cooling or heating
is insufficient (air is
NOT blown from the
unit).
The air conditioner may be warming up
for heating operation. Wait for 1 to 4
minutes.
The unit may be in defrost operation.
The system operates,
but cooling or heating
is insufficient (air is
blown from the unit).
Check if the air filters are clogged. Clean
the air filters. See "6 Maintenance and
service"on page8.
Check for open doors or windows. Close
doors and windows to prevent wind from
coming in.
Check if the unit operates in Econo
operation. Refer to "4.3.6 Econo
operation"on page7.
Check if there is any furniture directly
under or next to the indoor unit. Move the
furniture.
Malfunction Measure
An abnormal function
happens during
operation.
The air conditioner may malfunction
because of lightning or radio waves. Turn
the breaker OFF and back ON.
The unit does NOT
receive signals from
the user interface.
Check the batteries of the user interface.
Make sure that the transmitter is NOT
exposed to direct sunlight.
Check if there are any electronic starter
type fluorescent lamps in the room.
Contact your dealer.
The user interface
display is blank.
Replace the batteries of the user interface.
An error code is
displayed on the user
interface.
Consult your local dealer. Refer to
"7.2Solving problems based on error
codes"on page12 for a detailed list of
error codes.
Other electric
appliances start to
operate.
If the user interface signals operate other
electric appliances, move the other
appliances away, and contact your dealer.
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).
7.1 Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
7.1.1 Symptom: A sound like water flowing is
heard
This sound is caused by the refrigerant flowing in the unit.
This sound may be generated when water is flowing away from
the unit during cooling or drying operation.
7.1.2 Symptom: A blowing sound is heard
This sound is generated when the direction of the refrigerant flow is
changed (e.g. when switching from cooling to heating).
7.1.3 Symptom: A ticking sound is heard
This sound is generated when the unit slightly expands or contracts
with changes in temperature.
7.1.4 Symptom: A whistling sound is heard
This sound is generated by the refrigerant flowing during defrost
operation.
7.1.5 Symptom: A clicking sound during
operation or idle time is heard
This sound is generated when the refrigerant control valves or
electrical parts operate.
7.1.6 Symptom: A clapping sound is heard
This sound is generated when an external device sucks air out of the
room (e.g. exhaust fan, extractor hood) while the doors and windows
in the room are closed. Open the doors or windows, or turn off the
device.
7.1.7 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
11


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