Service Manual

SiUS04-921 Troubleshooting
Service Diagnosis 125
YES
Reconnect properly.
Replace the thermistor.
Replace the thermistor.
Replace the outdoor unit
PCB.
Does the remote
controller display
the error code
again?
Is it OK?
(R9446)
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
Is it OK?
Check No.02
Thermistor resistance check
Check No.02
Thermistor resistance check
Turn on the power supply again
NO
YES
NO
YES
NO
Troubleshooting
Check No.02
Refer to P.141
P4 : Radiation fin thermistor
J3 : Discharge pipe thermistor
J6 : Outdoor heat exchanger thermistor
H9 : Outdoor air thermistor