J6" Outdoor Unit: Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger - Daikin VRV III RXYQ5-54PY1 Service Manual

Si34-601A
3.27 "J6" Outdoor Unit:
Outdoor Unit Heat Exchanger
J6
Remote
Controller
Display
Applicable RXYQ5P~54P
Models
Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Malfunction
Detection
Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
Troubleshooting
Malfunction of Thermistor (R4T) for
Defect of thermistor (R4T) for outdoor unit coil
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.
Connector
is connected to X30A
of outdoor unit PC
board (A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
R4T from the indoor
unit PC board.
(1.8kΩ to
800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P365.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and turn on
again.
Replace the thermistor R4T.
Replace outdoor unit PC board
(A1P).
(V3074)
255