Service Manual

Troubleshooting SiUS041638E
87 Service Diagnosis
Troubleshooting In case of
H9
,
J3
,
J6
Check No.01
Refer to P.92
H9
: Outdoor temperature thermistor
J3
: Discharge pipe thermistor
J6
: Outdoor heat exchanger thermistor
Note: When replacing the defective thermistor(s), replace the thermistors as ASSY.
(R20406)
Caution
NO
YES
YES
NO
NO
YES
Turn on the power again.
Normal?
Reconnect the connectors
or thermistors.
J3 error: the discharge
pipe temperature is
lower than the heat
exchanger temperature.
Replace the defective
thermistor(s) of the following
thermistors.
∗ Outdoor temperature
thermistor
∗ Discharge pipe thermistor
∗ Outdoor heat exchanger
thermistor
Cooling: Outdoor heat
exchanger
temperature
Heating: Indoor heat
exchanger
temperature
Replace the indoor heat
exchanger thermistor.
Replace the outdoor unit
PCB (main PCB).
Error displayed
again on remote
controller?
Indoor heat
exchanger thermistor
functioning?
Check No. 01
Check the thermistor resistance
value.
Check No. 01
Check the indoor heat exchanger
thermistor resistance value in the
heating operation.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.