Radiation Fin Thermistor Abnormality - Daikin Super Multi Plus E-Series FTXG25EV1BW Service Manual

Troubleshooting for Outdoor Unit

7.23 Radiation Fin Thermistor Abnormality

P4
Remote
Controller
Display
Method of Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Detection
Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited
status
Decision
★
Conditions
Supposed
Causes
Troubleshooting
Power OFF
Power ON
408
Malfunction is not decided while the unit operation is continued.
P4
" " is displayed by pressing the inspection button.
Defective radiation fin thermistor
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Disconnect the lead wires
from the compressor, and
then check the compressor
for the insulation resistance.
The
insulation
resistance is low. (not
more than 100 kΩ)
Remove and insert the
connector for the fin
thermistor [X111A].
Turn
ON the power
supply, and then check
whether or not the
malfunction
recurs.
YES
NO
YES
NO
SiBE18-821_C
Replace the compressor.
Replace the main PCB
(A1P).
Completed.
(R13041)
Troubleshooting