Daikin Super Multi Plus D-Series, Service Manual

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SiEBE18-526 Troubleshooting for Outdoor Unit
Troubleshooting 303
7.10 Malfunction of Thermistor (R2T) for Suction Pipe
Remote
Controller
Display
J5
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the suction pipe temperature
thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.
Supposed
Causes „
Defect of thermistor (R2T) for outdoor unit suction pipe
„ Defect of outdoor unit PCB (A1P)
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P326.
(Q0430)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
(R2T) from the outdoor
unit PCB.
(3.5k
Ω
~
360k
Ω
)
Replace outdoor unit PCB A1P.
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor R2T.
YES
YES
Connector
is connected to outdoor
unit PCB.
(A1P)