NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
The liquid level detector is faulty.
Check the alarm. Check cable
connections for high and low liquid
level detectors. Check whether the
liquid level detectors are damaged. If
necessary, replace the liquid level
detectors.
The inlet pipe and drainpipe leak.
Check the inlet pipe and drainpipe
and the connectors. Rectify any
leakage and fasten the connectors.
The self-drainpipe is blocked.
Check that no blocks and frost in the
self-drainpipe.
The
humidity of
the computer
room is
high, or
condensate
water
generates.
The server heat load for each air
conditioner is lower than 5 kW.
Make sure that the doors,
windows, floor, and ceiling of the
datacenter room/container
environment are sealed well.
If the outside environment
humidity is too high, shut down
the fresh air system.
In modular datacenter, open the
modular doors and ceilings, or
open some false panel on the IT
rack.
Power
failures
occur on the
active and
standby
routes.
1. The input power has an open
phase.
2. The contactor fuse in the active
route is damaged.
3. The interlock contactor and
middle contactor are damaged.
1. Rectify the power supply fault.
2. Replace the fuse.
3. Replace the interlock contactor
and middle contactor.
The electric
heater
switch trips
abnormally.
Replace the electric heater switch.
The electric
heater fails.
The electric heater contactor is not
closed.
Replace the electric heater contactor.
The
compressor
switch trips
abnormally.
Replace the compressor switch.
The
crankcase
heater does
not heat.
1. The crankcase heater is
disconnected abnormally.
2. The fuse has blown.
3. The crankcase heater is
short-circuited abnormally, and
the fuse has blown.
1. Replace the crankcase heater.
2. Replace the fuse.
3. Replace the crankcase heater and
the fuse.
The relay contacts of the crankcase
Replace the crankcase heater relay.
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