Daikin E Series, Руководство по обслуживанию

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SiAU18-715 Troubleshooting for Outdoor Unit
Troubleshooting 383
7.24 Malfunction of Inverter Radiating Fin Temperature Rise
Sensor
Remote
Controller
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.
★
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.
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.
The
insulation
resistance is low (i.e.,
not more than
100k
Ω
.)
End
(Q0573)
Replace the compressor.
YES
Replace the outdoor unit
PC board (A1P).
YES
NO
NO
Power OFF
Power ON