Troubleshooting SiUS041829E
98 Part 6 Service Diagnosis
4.18 System Shutdown due to Temperature Abnormality in
Compressor
Error Code F8
Method of Error
Detection
Operation is halted when the temperature detected by the discharge pipe thermistor exceeds the
determined limit.
Error Decision
Conditions
Temperature exceeds the detection threshold of 127.5°C (261.5°F) during forced cooling operation.
Supposed
Causes
Abnormal operation due to air intrusion
Defective discharge pipe thermistor
Troubleshooting
Check No.01 Refer to P.112
When replacing the defective thermistor(s), replace the thermistor as ASSY.
YES
(R23655)
NO
OK
NG
Caution
Replace the outdoor unit. #
Replace both the discharge pipe
thermistor and the outdoor unit
PCB (main PCB).
Replace the outdoor unit.
#
Abnormal
deformation of piping in the
outdoor unit
Check No. 01
Check the discharge pipe
thermistor
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
#
Replace the unit as directed in the installation manual, making sure that air does not intrude
into the refrigerant pipings.
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