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 compressor does not work.
Check whether the drive is faulty.
Replace it if it is faulty.
The
compressor
exhaust
temperature
is too high.
The refrigerant loop or a
component is blocked.
Check whether the refrigerant loop or
a component is blocked.
The outdoor unit is installed in an
inappropriate position. (The
outdoor unit should not be exposed
to direct sunlight and must be
installed at a specified spacing
according to the installation
guide.)
Install the outdoor unit in a correct
position, without exposure to direct
sunlight and with an appropriate
spacing.
Air exists in the cooling system.
Exhaust air, and examine and repair
the pipeline.
Heat dissipation is poor because of
blockages in the condenser.
Clean the condenser fins.
Check whether the outdoor fan works.
Refrigerant is insufficient.
Increase the amount of refrigerant
filled.
The
compressor
exhaust
temperature
is too low.
The outdoor fan speed controller
fails.
Replace the speed controller.
Refrigerant is insufficient.
Increase the amount of refrigerant
filled.
Check the pipeline for any leakage.
The
compressor
suction
temperature
is too low or
liquid
returns.
The refrigerant filled is
insufficient.
The indoor temperature is too low.
Change the temperature setting.
Filters are clogged with dirt.
The superheat degree that is set
with the thermostatic expansion
valve is inappropriate.
Adjust the thermostatic expansion
valve to an optimal degree.
The sensing bulb is disconnected
from the thermostatic expansion
valve.
Check whether the thermometer bulb
is disconnected from the thermostatic
expansion valve.
The external excess pressure is too
high, and air decreases.
Check whether the air duct is
blocked.
The condensing pressure is too
low.
Liquid returns in a compressor.
Check whether the oil temperature
and exhaust temperature are within a
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