running for 30 minutes and will not be restricted by low-load protection (refer to protection function).
1.1.6.1.3 Finishing conditions
Trial running will stop when remote control or emergency signal is received. After 30 minutes trial running,
emergency running (automatic running) starts.
1.1.6.2 Abnormity diagnose
When displaying abnormity, using indicator to express the previous error.
When having no error code record, show nothing.
The abnormity indicating mode will automatically disappeared 30 seconds later.
The remote controller only receives stopping signal and abnormity record indicating mode will finish according to
the stopping signal of the switch or the remote controller.
1.1.6.2.1 Beginning conditions
Pressing emergency switch 10-15 seconds, the buzzer sounds three times, and then start.
1.1.6.2.2 Running status。
The indicator displays the previous error code (see the error code list).
1.1.6.2.3 Finishing condition。
Finishing when remote control or emergency signal is received.
1.1.7 Protection function
1.1.7.1 Low-load protection
During cooling running, if the indoor coil-pipe does not evaporate thoroughly and the temperature is too low, the
compressor must be stopped for protection to prevent it from damaging due to the system “liquid hitting”. See the
following figure for action details:
Low-load protection control:
Thermal conversion temperature:
2ºC
-0.5ºC
Normal Min. frequency Stop Min Limit
Normal
Display
frequency
HSU-12H03/(Bp)/1
Indoor coil pipe temperature sensor type: R (25ºC)=10KΩ
During cooling-dehumidification running, low-load protection is carried out according to indoor coil-pipe
temperature; whereas, the displayed frequency is “58Hz”.
Model:
HSU-09H03/(BP)1
HSU-12H03/(BP)1Domestic Air Conditioner
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