Troubleshooting by Error Code SiUS331604E
179 Service Diagnosis
4.27 Thermistor Abnormality
Error Code H9, J3, J5, J6, J7, J9
Applicable
Models
All outdoor units
Method of Error
Detection
Error is detected from the temperature detected by the thermistor∗1.
Error Decision
Conditions
When the thermistor has short circuit or open circuit
Supposed
Causes
Defective thermistor
Defective outdoor main PCB
Defective thermistor connection
Troubleshooting
Refer to page 231.
Note: ∗1
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Connector is
connected to outdoor
unit PCB.
Replace the outdoor main PCB
(A1P).
Connect the connector and turn on
again.
NO
NO
Replace the defective thermistor.
YES
YES
Resistance
is normal when
measured after
disconnecting the thermistor
from the outdoor main
PCB.
CHECK 11
CHECK 11
Error
code
Thermistor
RXTQ36/48TAVJU RXTQ60TAVJU
Symbol
Connector
Symbol
Connector
H9 Outdoor air thermistor R1T X11A R1T X11A
J3 Discharge pipe thermistor R2T
X12A
R2T
X12AJ5 Suction pipe thermistor
R3T R3T
R5T R5T
J6 Outdoor heat exchanger deicer thermistor R4T R4T
J7
Outdoor heat exchanger liquid pipe
thermistor
R7T X13A R7T
X13A
J9
Subcooling heat exchanger gas pipe
thermistor
——R6T
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