Service Manual

SiUS041638E Troubleshooting
Service Diagnosis 80
4.18 System Shutdown due to Compressor Internal
Temperature Abnormality
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 during forced cooling operation.
Supposed
Causes

Abnormal operation due to air intrusion

Defective discharge pipe thermistor
Troubleshooting
Check No.01
Refer to P.92
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.