Troubleshooting by Error Code SiAF332111E
252 Part 6 Service Diagnosis
5.31.3 Discharge Pipe Temperature Abnormality (10/12 HP Models)
Applicable
Models
RXMQ10/12AR
Error Code F3
Method of Error
Detection
Abnormality is detected according to the temperature detected with the discharge pipe or
compressor body thermistor.
Error Decision
Conditions
When discharge pipe temperature becomes abnormally high (135°C or more)
When discharge pipe temperature rises sharply (remains at 120°C or more for a continuous
period of 10 minutes)
When compressor body temperature becomes abnormally high (120°C or more)
When compressor body temperature rises sharply (remains at 110°C or more for a continuous
period of 10 minutes)
Supposed
Causes
Abnormal discharge pipe temperature
Defective discharge pipe thermistor
Abnormal compressor body temperature
Defective compressor body thermistor
Defective outdoor unit main PCB
Troubleshooting
1: Use a surface thermistor to measure the actual temperature.
Refer to CHECK 11 for temperature and resistance properties of the thermistor.
CHECK 3 Refer to page 339.
CHECK 11 Refer to page 350.
NO
NO
Replace the relevant
thermistor.
Replace the outdoor
unit main PCB (A1P).
Connect the Service Checker.
Reset system operation, and then restart operation.
YES
YES
- All thermistors are normal, and temperature detection with the
outdoor unit main PCB is also normal.
- The discharge pipe actual temperature (or compressor body
temperature) rises.
CHECK 3 Eliminate the causes of superheating operation.
Service Checker
Connect the service checker to compare the discharge pipe temperature
(or compressor body temperature) and the actual measured value of the
discharge pipe surface temperature (or compressor body temperature) (1).
Is the
temperature checked by the
service checker the same as the actual
measured value of the
temperature?
Are the
characteristics of the
discharge pipe and compressor body
thermistors normal?
CHECK 11
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