Overheat Protection For Exhaust Temperature - Haier HSU-18HEA03/R2(DB)-I Service Manual

7.3.7 Overheat Protection For Exhaust Temperature

outdoor display LED1 flash 8 times
Method of the exhaust temperature control is checked with the temperature being detected
Malfunction by the exhaust pipe thermistor
Detection
Malfunction when the compressor discharge temperature is above 117
Decision
Conditions
Supposed Electronic expansion valve defective
Causes Faulty thermistor
Faulty PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
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 117
after the machine
starts up?
Measure the temperature at the exhaust
temperature sensor of the compressor on the
outdoor unit
Malfunctions occur after
running for some time? even
though the asured
temperature is below 117 .
HSU-18HEA03/R2(DB)-I
else parts damage may be occurred.
shortly
NO
NO
66
1) The cryogen may have been leaked during
installation, or there may be leakage in the
piping system.
YES
2) There may be other causes to make the
exhaust temperature too high.
YES
Exhaust temperature sensor is broken and
needs be replaced
Service Diagnosis
or
Domestic air conditioner