Johnson Controls YJHJXH024BARR-FX, Service Manual

Page: 73 / 123

Service Diagnosis
Domestic Air Conditioner
70
7.3.6 Overheat Protection For Exhaust Temperature
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LED1 flash 8 times
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the exhaust temperature control is checked with the temperature being detected
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by the exhaust pipe thermistor
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when the compressor discharge temperature is above 117 ć
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Ƶ Electronic expansion valve defective
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Ƶ Faulty thermistor
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Faulty PCB
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Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
YES
NO
the temperature
exceeds 110 shortly
ć
after the machine
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.
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
Measure the temperature at the exhaust temperature
sensor of the compressor on the outdoor unit
YES
Malfunctions occur after
running for some time? even
though the asured
temperature is below 117
ć
.
Exhaust temperature
sensor is broken and
needs be replaced
NO
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