Daikin RXYQ96PYDN Service Manual page 395

Troubleshooting by Indication on the Remote Controller
J3
3.26 Outdoor Unit: Malfunction of Discharge Pipe
Thermistor (R31, 32T)
J3
Remote
Controller
Display
Applicable
RXYQ72P~240PYDN, PTJU
Models REYQ72P~240PYDN, PTJU
Method of
Temperature detected by discharge pipe temperature thermistor.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
∗ Refer to the Thermistor Resistance / Temperature Characteristics table on Page 523.
380
Defect of thermistor (R31T, R32T) for outdoor unit discharge 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 X29A
of outdoor unit
PC board
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
R31, 32T or R33T from the
outdoor unit PC board.
(2.5kΩ to
1.3kΩ)
YES
NO
NO
SiUS34-801A_b
Connect the connector and turn on
again.
Replace the thermistor (R31, 32T
or R33T)
Replace outdoor unit PC board
(A1P).
Troubleshooting