Seivice diagnosis
Domestic air conditioner
11.4.9 Overheat Protection For Discharge Temperature
Electrify the machine again and turn it on with the remote controller,
then measure the temperature at the exhaust temperature sensor of
the compressor on the outdoor unit
the temperature exceeds
110
shortly after the
machine starts up?
1) The cryogen may have been leaked during
installation, or there may be leakage in the piping
system.
2) There may be other causes to make the exhaust
temperature too high.
Malfunctions occur after running for some time even
though the measured temperature is below 110 . Pull
out the exhaust sensor and measure its resistance at
standard
temperatures
according
to
the
resistance-temperature table
the
results
deviate
much?
The sensor is damaged. Replace the sensor
with a new one.
The outdoor mainboard is damaged and needs be
replaced
YES
NO
NO
YES
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
The Discharge temperature control is checked with the temperature being detected by
the Discharge pipe thermistor
when the compressor discharge temperature is above 230 F
Electronic expansion valve defective
Faulty thermistor
Faulty PCB
Supposed causes
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
LED1 flash 8 times
Outdoor diplay
55
