Troubleshooting
SiUS041829E
98
Part 6 Service Diagnosis
Reference
Note
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
When replacing the defective thermistor(s), replace the thermistor as ASSY.
YES
(R23655)
NO
OK
NG
Caution
Replace the o
u
tdoor
u
nit.
#
Replace both the discharge pipe
thermistor and the o
u
tdoor
u
nit
PCB (main PCB).
Replace the o
u
tdoor
u
nit.
#
Abnormal
deformation of piping in the
o
u
tdoor
u
nit
Check No. 01
Check the discharge pipe
thermistor
Be s
u
re to t
u
rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
#
Replace the
u
nit as directed in the installation man
u
al, making s
u
re that air does not intr
u
de
into the refrigerant pipings.
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