Haier D Series Service Manual page 42

The Discharge temperature control is checked with the temperature being detected
Method of
by the Discharge pipe thermistor
Malfunction
Detection
when the compressor discharge temperature is above 110
Malfunction
Detection
Conditions
Electronic expansion valve defective
Faulty thermistor
Supposed
Faulty PCB
Causes
Troubleshooti
* Caution Be sure to turn off power switch before connect or disconnect connector,
ng
Turn on the unit.
Test WHETHER the compressor running normal.
the temperature exceeds
110
machine starts up?
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
resistance-temperature table
the
much?
The outdoor mainboard is damaged and needs be
replaced
shortly after the
NO
according to
results deviate
NO
else parts damage may be occurred.
1) The cryogen may have been leaked during
YES
installation, or there may be leakage in the piping
system.
2) There may be other causes to make the exhaust
temperature too high.
the
YES
The sensor is damaged. Replace the sensor
with a new one.
40
Service diagnosis
or
Domestic air conditioner