Daikin Super Multi Plus D-Series, Service Manual

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SiEBE18-526 Troubleshooting for Outdoor Unit
Troubleshooting 305
7.12 Malfunction of Receiver Gas Pipe Thermistor (R5T)
Remote
Controller
Display
J9
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected according to the temperature detected by receiver gas pipe thermistor
(= Subcooling heat exchanger gas pipe thermistor).
Malfunction
Decision
Conditions
When the receiver gas pipe thermistor is short circuited or open.
Supposed
Causes „
Faulty receiver gas pipe thermistor (R5T)
„ Faulty outdoor unit PCB
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P326.
(Q0445)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the
resistance
measured after
removing the thermistor
(R5T) from outdoor unit
PCB normal.
(3.5 k
Ω
to
360 k
Ω
)
Replace outdoor unit PCB (A1P).
Connect thermistor and turn on
again.
NO
NO
Replace the thermistor (R5T).
YES
YES
Is the
connector for
receiver gas pipe
thermistor connected to
outdoor unit PCB
(A1P)