Overheat Protection For Discharge Temperature - Haier D-Series Service Manual

10.4.9 Overheat Protection For Discharge Temperature

Outdoor display:
Method of
Malfunction Detection
Malfunction
Detection Conditions
Supposed Causes
Troubleshooting
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
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
LED1 flash 8 times
The Discharge temperature control is checked with the temperature being detected
by the Discharge pipe thermistor
when the compressor discharge temperature is above 110
■ Electronic expansion valve defective
■ Faulty thermistor
■ Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
shortly after the
NO
according
results deviate
NO
or 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.
to the
YES
The sensor is damaged. Replace the sensor
with a new one.
47
Seivice diagnosis
Domestic air conditioner