Troubleshooting for Outdoor Unit SiBE18-821_C
392 Troubleshooting
7.7 Discharge Pipe Temperature Abnormality
Remote
Controller
Display
F3
Method of
Malfunction
Detection
The temperature detected by the discharge pipe thermistor determines the error.
Malfunction
Decision
Conditions
When the discharge pipe temperature rises to an abnormally high level (135 °C and above)
When the discharge pipe temperature rises suddenly (120 °C and above for 10 successive
minutes)
Supposed
Causes
Defective discharge pipe thermistor
Disconnection of discharge pipe thermistor (R2T)
Defective main PCB (A1P)
Troubleshooting
Check No.04
Refer to P.426
∗
1: Compare the resistance value of discharge pipe thermistor and the value based on the
surface thermometer.
Refer to “Thermistor Resistance / Temperature Characteristics” table 3 on page 428.
NO
NO
Replace the discharge pipe
thermistor (R2T).
Replace the main PCB (A1P).
YES
YES
· Discharge pipe thermistor is normal and the
temperature detection of the main PCB (A1P) is
also normal.
· Actually the temperature of discharge pipe is high.
Check No.04 Remove the factor of overheat
operation.
Service Checker
Connect the service checker to compare the
temperature of discharge pipe by using service
checker with actual measurement value of discharge
pipe thermistor (Refer to *1).
Connect the service checker.
Press reset and start operation
again.
(R13023)
Is the
temperature
of discharge pipe
by using service
checker the same with
actual measurement
value of discharge
pipe
thermistor?
Is discharge pipe
thermistor property
normal?
(∗1)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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