Huawei NetCol5000-A-035 - Page 191

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
6 System Operation and Maintenance
Issue 13 (2019-01-15)
Copyright © Huawei Technologies Co., Ltd.
182
Symptom
Possible Cause
Solution
The unit generates abnormal
voice.
Compressor, fans, or pipes
are loose.
Check the fixing structure
and ensure that all
components are securely
installed.
A compressor does not
work.
The high-pressure switch
reacts.
Check the high-pressure
switch status.
Circuit breakers, fuses, or
cables are disconnected.
Check the main circuit
breaker, compressor circuit
breakers, fuses, and cables.
A compressor motor is
damaged.
Replace the motor.
A compressor does not need
to start.
Check for any startup
requirement on the LCD.
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.
An outdoor fan fails.
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 leaking.
Check the pipeline for any
leakage.
The compressor suction
temperature is too low or
liquid returns.
The refrigerant filled is
insufficient.
Add the refrigerant.
The indoor temperature is
too low.
Change the temperature
setting.
Filters are clogged with dirt.
Replace the filters.