Online Access Free Huawei.H12-421-ENU.v2022-01-01.q82 Practice Test (Page 16)

Which of the following is not part of the NetCol 5000-C30kW precision air conditioner.

A.DC fan high efficiency power supply module

B.PID flow regulating valve

C.DC inverter compressor

D.EC fan

If the customer load cannot be de-energized, pay attention to ( ) when disconnecting the maintenance bypass switch after the repair is completed.

A.Battery input is normal

B.EPO status can be broken maintenance switch

C.The maintenance bypass switch can also be disconnected when the bypass module is abnormal.

D.The road module has no abnormal alarm and can be powered.

The NetCol 8000-A compressor has a large amount of foam in the oil sight glass for a long time, indicating that the superheat is too large.

A.True

B.False

Which interface is not on the smart ETH socket?

A.PoE

B.PWR_OUT power cascade interface

C.AI/DI

D.PWR_IN power cascade interface

When installing the Huawei air-cooled air conditioner, the refrigerant pipeline positive pressure is required to be () hours.

A.12

B.8

C.36

D.24

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