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Troubleshooting
User Reference Guide
38
FTXP20~35M5V1B9
Daikin room air conditioners
4D520466-7C – 2020.03
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
▪
Check the temperature setting. Refer to
start/stop operation mode and to set the
temperature"
19].
▪
Check if the airflow direction setting is
appropriate. Refer to
21].
▪
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
30].
▪
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
25].
▪
Check if there is any furniture directly under or
next to the indoor unit. Move the furniture.
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.