Si39-302 Troubleshooting by Indication on the Remote Controller
Troubleshooting 187
2.27
“
J6
”
Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
Remote
Controller
Display
J6
Applicable
Models
RXYQ5~48M
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed
Causes
!
Defect of thermistor (R4T) for outdoor unit coil
!
Defect of outdoor unit PC board (A1P)
Troubleshooting
∗
2: Refer to thermistor resistance / temperature characteristics table on P280.
(V3074)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
R4T from the indoor
unit PC board.
(3.5kΩ~
360kΩ)
Replace outdoor unit PC board
A1P.
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor R4T.
YES
YES
Connector
is connected to X37A
of outdoor unit PC
board (A1P).
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