Daikin FXSQ80P7VEB [262/370] Outdoor unit heat exchanger thermistor r4t

Daikin FXSQ25PVE4 [262/370] Outdoor unit heat exchanger thermistor r4t
Troubleshooting by Indication on the Remote Controller SiBE311209
253 Service Diagnosis
4.29 Outdoor Unit Heat Exchanger Thermistor (R4T)
Remote
Controller
Display
J6
Applicable
Models
Outdoor Unit: RTSQ8~16PAY1
Function Unit: BTSQ20PY1
Method of Error
Detection
Error is detected from the temperature detected by the heat exchanger thermistor.
Error Decision
Conditions
When a short circuit or an open circuit in the heat exchanger thermistor is detected
Supposed
Causes
Defective outdoor unit heat exchanger thermistor (R4T)
Defective outdoor unit PCB (A1P)
Defective connection of thermistor
Troubleshooting
Refer to P.314.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Connector is
connected to X30A
of outdoor unit PCB
(A1P).
NO
YES
Resistance is normal when
measured after disconnecting
the thermistor R4T from the
indoor unit PCB.
CHECK 11
NO
YES
Connect the connector and turn ON
again.
Replace the thermistor (R4T).
Replace the outdoor unit PCB
(A1P).
CHECK 11

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