Si20-701_B Troubleshooting by Remote Controller
250
3.51
J6
Heat Exchanger Thermistor
System Abnormality
Remote Controller Display
J6
Applicable Models
RY-F/FU, R(Y)-G/GA/KU/LU, RR-M
Error Decision Conditions
Case where the heat exchanger thermistor has a short or
open circuit
Supposed Causes
îš„ Defective heat exchanger thermistor
 Defective heat exchanger thermistor’s connector
connection
îš„ Defective outdoor unit PCB
Troubleshooting
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Is the
thermistor normal?
NO
YES
Replace the heat
exchanger
thermistor.
If contact is OK,
replace the
outdoor unit
PCB.
Disconnect the heat
exchanger thermistor
from the connector on the
outdoor unit PCB and
measure the resistance.
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