SiBE18-821_C Troubleshooting for Outdoor Unit
Troubleshooting 399
7.14 Subcooling Heat Exchanger Gas Pipe Thermistor (R6T)
Abnormality
Remote
Controller
Display
J9
Method of
Malfunction
Detection
The temperature detected by subcooling heat exchanger gas pipe thermistor determines the
error.
Malfunction
Decision
Conditions
When the subcooling heat exchanger gas pipe thermistor is short circuited or open
Supposed
Causes
Disconnection of thermistor
Defective subcooling heat exchanger gas pipe thermistor (R6T)
Defective main PCB (A1P)
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table 2 on page 427.
Is the
resistance is
normal when
measured after
disconnecting the
thermistor (R6T)?
(3.5 kΩ to 360 kΩ)
Replace the main PCB
(A1P).
(R13030)
Replace the subcooling
heat exchanger gas pipe
thermistor (R6T).
NO
YES
YES
Is the thermistor
ASSY is connected to
X13A on the main PCB
(A1P)?
Connect the thermistor and
turn on again.
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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