SiBE31-801_C Troubleshooting by Indication on the Remote Controller
Troubleshooting 264
4.27 “
J4
” Outdoor Unit: Malfunction of Temperature Sensor
for Heat Exchanger Gas (R2T)
Remote
Controller
Display
J4
Applicable
Models
RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
Method of
Malfunction
Detection
Detect malfunction based on the temperature detected by each thermistor.
Malfunction
Decision
Conditions
In operation, when a thermistor is disconnected or short circuits.
Supposed
Causes
Defective connection of thermistor
Defective thermistor
Defective outdoor unit PCB
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.408.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connector is
connected to X30A
of outdoor PCB
(A1P).
NO
YES
Resistance is normal
when measured after
disconnecting the
thermistor (R2T) from
the outdoor unit PCB.
(1.8k
Ω
to 800k
Ω
)
NO
YES
Connect the connector and turn on
again.
Replace the thermistor (R2T)
Replace the outdoor unit PCB
(A1P).
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