Daikin RXYQ96PYDN Service Manual page 397

Troubleshooting by Indication on the Remote Controller
J5
3.28 Outdoor Unit: Malfunction of Thermistor (R8T or R10T)
for Suction Pipe
J5
Remote
Controller
Display
Applicable
RXYQ72P~240PYDN, PTJU
Models REYQ72P~240PYDN, PTJU
Method of
Temperature detected by the suction pipe temperature thermistor.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗ Refer to the Thermistor Resistance / Temperature Characteristics table on Page 523.
382
Defect of thermistor (R8T or R10T) for outdoor unit suction pipe
Defect of outdoor unit PC board (A1P)
Defect of thermistor connection
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Confirm which discharge
thermistor is abnormal using
outdoor unit "monitor mode".
(Refer to P334~335)
Connector
is connected to
X30A, of outdoor unit
PC board.
(A1P)
YES
Resistance
is normal when
measured after dis-
connecting the thermistor
(R8T or R10T) from the
outdoor unit PC
board. (1.8kΩ to
800kΩ)
YES
NO
NO
SiUS34-801A_b
Connect the connector and turn on
again.
Replace the thermistor R8T or
R10T.
Replace outdoor unit PC board
(A1P).
(V3073)
Troubleshooting