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NetCol5000-A021 In-row Air Cooled Smart Cooling
Product
User Manual (208 V)
Table 6-6 Troubleshooting
Symptom
The unit generates abnormal
voice.
A compressor does not
work.
The compressor discharge
temperature is too high
The compressor discharge
pressure is too low.
Issue 03 (2020-01-10)
Possible Cause
Compressor, fans, or pipes
are loose.
The high-pressure switch
reacts.
Circuit breakers, fuses, or
cables are disconnected.
A compressor motor is
damaged.
A compressor does not need
to start.
The compressor driver is
faulty.
The refrigerant loop or
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.)
Air exists in the cooling
system.
Heat dissipation is poor
because of blockages in the
condenser.
An outdoor fan fails.
The refrigerant is
insufficient.
The refrigerant is
insufficient.
The outdoor fan speed
controller fails.
The refrigerant leaks.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
Check the fixing structure
and ensure that all
components are securely
installed.
Check the high-pressure
switch status.
Check the main circuit
breaker, compressor circuit
breakers, fuses, and cables.
Replace the motor.
Check for any startup
requirement on the LCD.
Check whether the driver is
faulty. Replace it if it is
faulty.
Clean up foreign matter
from the refrigerant loop.
Install the outdoor unit in a
correct position, without
exposure to direct sunlight
and with an appropriate
spacing.
Exhaust air, and examine
and repair the pipeline.
Clean the condenser fins.
Check whether the outdoor
fan works.
Fill more refrigerant.
Fill more refrigerant.
Replace the fan speed
controller.
Check the pipeline for
leakages.
181
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