SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 375
7.14 Malfunction of Subcooling Heat Exchanger Thermistor
(R6T)
Remote Control
Display
J9
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected according to the temperature detected by subcooling heat exchanger
gas pipe thermistor.
Malfunction
Decision
Conditions
When the subcooling heat exchanger gas pipe thermistor is short circuited or open.
Supposed
Causes
Faulty subcooling heat exchanger gas pipe thermistor (R6T)
Faulty outdoor unit PCB
Troubleshooting
∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P407.
(V3075)
Caution
NO
NO
YES
YES
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connect connector and operate
unit again.
Replace thermistor (R6T).
Replace outdoor unit PC board
(A1P).
Is the
connector for
subcooling heat
exchanger gas pipe
thermistor connected
to outdoor unit PC
board (A1P)?
Is
the resistance
measured after
removing the thermistor
(R6T) from outdoor unit
PC board normal?
(3.5kΩ to
360kΩ)
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