Daikin FTKS50BVMB, Service Manual

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SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 385
7.24 Malfunction of Inverter Radiating Fin Temperature Rise
Sensor
Remote Control
Display
P4
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Decision
Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
H
Malfunction is not decided while the unit operation is continued.
"P4" will be displayed by pressing the inspection button.
Supposed
Causes „ Defect of radiator fin temperature sensor
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Power OFF
Power ON
Replace the
compressor.
YES
YES
NO
NO
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
Remove and insert the fin
thermistor connector [X111A].
Turn ON the
power supply, and then check whether
or not the malfunction
recurs.
End
Replace the outdoor
unit PC board (A1P).