Huawei NetCol5000-A025 - Page 233

Symptom Possible Cause Solution
Air exists in the cooling
system.
Exhaust air, and examine
and repair the pipes.
Heat dissipation is poor
because of blockages in
the condenser.
Clean the condenser ns.
An outdoor fan fails. Check whether the
outdoor fan works.
The refrigerant is
insucient.
Fill more refrigerant.
The compressor
discharge pressure is too
low.
The refrigerant is
insucient.
Fill more refrigerant.
The outdoor fan speed
controller fails.
Replace the fan speed
controller.
The refrigerant leaks. Check the pipes for
leaks.
The compressor suction
pressure is too low.
The refrigerant is
insucient.
Fill more refrigerant.
The condensing pressure
is too low.
Check whether the
outdoor temperature is
too low and whether the
outdoor fan is under
control.
Liquid returns to the
compressor.
The indoor temperature
is too low.
Change the temperature
setting.
The air lter is dirty or
blocked.
Replace the air lter.
The coil of the electronic
expansion valve is faulty.
Replace the electronic
expansion valve coil.
The external residual
pressure is too high, and
air volume decreases.
Check whether the air
channel is blocked.
The compressor
generates excessive
noises. (It is common
that the compressor
generates much noise
when it is shutting
down)
Liquid returns in a
compressor.
Check whether the oil
temperature and
discharge temperature
are within the normal
range (70–100°C)
The refrigerant oil is
insucient.
Add refrigerant oil.
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 6 System Operation and Maintenance
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 223