Huawei NetCol5000-A User Manual page 191

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
Symptom
The unit generates abnormal
voice.
A compressor does not
work.
The compressor exhaust
temperature is too high.
The compressor exhaust
temperature is too low.
The compressor suction
temperature is too low or
liquid returns.
Issue 13 (2019-01-15)
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 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.)
Air exists in the cooling
system.
Heat dissipation is poor
because of blockages in the
condenser.
An outdoor fan fails.
Refrigerant is insufficient.
The outdoor fan speed
controller fails.
Refrigerant is leaking.
The refrigerant filled is
insufficient.
The indoor temperature is
too low.
Filters are clogged with dirt.
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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
refrigerant loop or a
component is blocked.
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.
Increase the amount of
refrigerant filled.
Replace the speed
controller.
Check the pipeline for any
leakage.
Add the refrigerant.
Change the temperature
setting.
Replace the filters.
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