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Troubleshooting
User reference guide
40
FTXP20~35 ATXP20~35N5V1B9
Daikin room air conditioner
4D520466-17M – 2023.08
Error code
Description
Indoor heat exchanger thermistor abnormality
Room temperature thermistor abnormality
Outdoor unit
Error code
Description
4-way valve abnormality
Outdoor unit PCB abnormality
Overload activation (compressor overload)
Compressor lock
DC fan lock
Input power overcurrent
Discharge pipe temperature control
High-pressure control (in cooling mode)
Compressor system sensor abnormality
Position sensor abnormality
DC voltage / current sensor abnormality
Outdoor temperature thermistor abnormality
Discharge pipe thermistor abnormality
Outdoor heat exchanger thermistor abnormality
Electrical parts heat error
Radiation fin temperature rise
Inverter instantaneous overcurrent (DC)
Radiation fin thermistor abnormality
Compressor internal temperature error
8.3 Troubleshooting for wireless LAN connection
The following table provides a brief description of how to deal with some
problems. If none of the following solutions fix the problem, go to
for more information and FAQ.
Problem
Measure
Connection to the wireless LAN is not
possible (none of the LEDs on the
indoor unit display are blinking).
▪
Try operating the unit with the user
interface.
▪
Check if the power is on.
▪
Turn the unit off and back on again.
