J3" Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R31T, R32T, R33T) - Daikin RTSQ20PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
J3
4.26 " " Outdoor Unit: Malfunction of Discharge Pipe
Thermistor (R31T, R32T, R33T)
J3
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
Models
Method of Malfunction is detected from the 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.
∗
263
Defect of thermistor (R31T, R32T, R33T) for outdoor unit discharge pipe
Defect of outdoor unit PCB (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 P.216~217)
Connector is
connected to X29A
of outdoor unit PCB
(A1P).
YES
Resistance is normal
when measured after
disconnecting the
thermistor R31, 32T or
R33T from the outdoor
unit PCB. (2.5kΩ to
1.3kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.408.
NO
NO
SiBE31-801_C
Connect the connector and turn on
again.
Replace the thermistor (R31, 32T
or R33T)
Replace the outdoor unit PCB
(A1P).
Troubleshooting