MXS Service Manual

SiUS121736EA Troubleshooting for Outdoor Unit
Service Diagnosis 204
Troubleshooting In case of H9, J3, J6, J8, J9
Check No.01
Refer to P.209
H9 : Outdoor temperature thermistor
J3 : Discharge pipe thermistor
J6 : Outdoor heat exchanger thermistor
J8 : Liquid pipe thermistor
J9 : Gas pipe thermistor
Note: When replacing the defective thermistor(s), replace the thermistors as ASSY.
(R21118)
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).
∗ Outdoor temperature
thermistor
∗ Discharge pipe thermistor
∗ Outdoor heat exchanger
thermistor
∗ Liquid pipe thermistor
∗ Gas pipe thermistor
Cooling: Outdoor heat
exchanger
thermistor
Heating: Indoor heat
exchanger
thermistor
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.