Haier HSU-12HF03(B) [39/63] Brief introduction to electrical function

Brief introduction to electrical function

When in trial running, the display frequency of compressor is 58Hz, running mode is cool, compressor keeps on

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:

2

-0.5

Display

frequency

Normal Min. frequency Stop Min Limit

Normal

Indoor coil pipe temperature sensor type: R (25)=10KΩ