J3" Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R3, R31~33T) - Daikin VRV III RXYQ5-54PY1 Service Manual

Si34-601A
3.25 "J3" Outdoor Unit:
Thermistor (R3, R31~33T)
J3
Remote
Controller
Display
Applicable RXYQ5P~54P
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.
Note: 5 HP class ··· R3T
8~12 HP class ··· R31T, R32T
14, 16Hp class ··· R31T, R32T and R33T
∗
Troubleshooting
Malfunction of Discharge Pipe
Defect of thermistor (R31T, R32T or R33T) 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 page 216 and 217)
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
Refer to "Thermistor Resistance / Temperature Characteristics" table on P366.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and turn on
again.
Replace the thermistor (R31, 32T
or R33T)
Replace outdoor unit PC board
(A1P).
(V3072)
253