SiBE31-801_C
J6
4.29 "
" Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
J6
Remote
Controller
Display
Applicable
RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
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 exchanger thermistor is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
Troubleshooting
Defect of thermistor (R4T) for outdoor unit heat exchanger
Defect of outdoor unit PCB (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 PCB
(A1P).
YES
Resistance is normal
when measured after
disconnecting the
thermistor R4T from
the indoor unit PCB.
(1.8kΩ to 800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.408.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and turn on
again.
Replace the thermistor R4T.
Replace the outdoor unit PCB
(A1P).
266