Huawei NetCol8000-E220 User Manual page 141

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Symptom
The compressor suction
pressure is too low or
liquid returns.
The compressor
generates loud noise.
The fan fails to start.
The water does not spray
properly
Issue 06 (2020-08-19)
Possible Cause
Refrigerant is
insufficient.
The indoor temperature
is set to a low
temperature.
The air filter is dirty or
blocked.
The external residual
pressure is too high, and
airflow decreases.
The condensing pressure
is too low.
Liquid is returning to the
compressor.
Refrigerant oil is
insufficient.
The sheet metal for
securing the compressor
during transportation is
not removed.
The switch of the fan is
not turned on.
The fan is damaged.
The interconnection
terminals for the fan are
not securely connected.
The Y-shaped strainer is
blocked.
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6 System Operation and Maintenance
Solution
Charge more refrigerant.
Modify the temperature
setting.
Replace the air filter.
Check whether the air
channels are blocked.
Check the condenser.
Check whether the oil
temperature and
discharge temperature
are within the normal
range.
Add refrigerant oil.
Remove the sheet metal.
Check the switch of the
fan.
Replace the fan.
Secure the
interconnection
terminals.
Remove the air filter
from the Y-shaped
strainer in the shutdown
mode, exhaust water
from the pipe, and clean
the air filter. (Use
running water or high
pressure water to clean
it.)
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