Troubleshooting for Outdoor Unit Si18-525B
372 Troubleshooting
7.7 Abnormal Discharge Pipe Temperature
Remote
Controller
Display
F3
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Abnormality is detected according to the temperature detected by the discharge pipe
temperature sensor.
Malfunction
Decision
Conditions
When the discharge pipe temperature rises to an abnormally high level
When the discharge pipe temperature rises suddenly
Supposed
Causes
Faulty discharge pipe temperature
Faulty connection of discharge pipe thermistor
Faulty outdoor unit PCB
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P398.
(Q0427)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge pipe
temperature is 115˚C
or higher.
Are
the characteristics
of the discharge pipe
thermistor normal?
(3.5~400KΩ)
Replace outdoor unit PCB A1P.
Replace the discharge pipe
thermistor.
NO
NO
Out of gas, compression defect,
etc. Defect of the refrigerant
system.
YES
YES
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