Outdoor Unit Heat Exchanger - Daikin VRV III REYQ8PY1 Service Manual

Si37-701
J6
3.29 " " Outdoor Unit:
R12T) for Outdoor Unit Heat Exchanger
J6
Remote
Controller
Display
Applicable REYQ8P~48P
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 or
Defect of thermistor (R4T or R12T) 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.
Confirm which thermistor is
abnormal using outdoor unit
"monitor mode".
(Refer to P226~227)
Connector
is connected to X30A
of outdoor unit PC
board (A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
R4T or R12T from the
indoor unit PC
board. (1.8kΩ
to 800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P417.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and turn on
again.
Replace the thermistor R4T or
R12T.
Replace outdoor unit PC board
(A1P).
(V3074)
275