Huawei NetCol8000-E220 User Manual page 115

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual
Task
Pipe
Indoor fan
and exhaust
fan
Heat
exchanger
core
Pump
Issue 02 (2019-10-10)
Baseline Requirement
generates no metal friction noise
or collision noise from inside.
The refrigerant pipe does not leak
or corrode, and the wrapped
thermal insulation foam is intact.
Wear protective gloves and touch
the compressor angle valve (Only
for NetCol8000-E220DM0BA),
needle valve, and soldering
points in the refrigerant pipe to
check whether there are oil
stains.
No water exists under the water
pipe or on the thermal insulation
foam.
The refrigerant pipe support is
secure and intact.
The indoor fan and exhaust fan
guards are not deformed, and the
fan blades are not damaged.
The indoor fan and exhaust fan
run smoothly.
The screws on the indoor fan and
exhaust fan are not loose or
distorted.
Check whether the heat
exchanger core is damaged.
Check whether the heat
exchanger core has scale.
Check whether the water pump is
rusted.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Troubleshooting
Repair the leakage points and rewrap
thermal insulation foam.
If there is an oil stain, check whether
the suction and exhaust pressure of the
compressor is within the normal ranges.
(For the proper ranges of suction and
exhaust pressure of the compressor, If
the pressure is beyond the normal
range, contact Huawei technical
support.
 If drops of water are evenly
distributed, wipe off them with a dry
cloth.
 If there are large water marks, close
the water inlet sluice and process the
leak points. If the thermal insulation
foam is damaged or missing, lay out
new thermal insulation foam.
Replace the refrigerant pipe support and
secure it again.
Replace the fan.
Take out the foreign matter.
Tighten the screws using a 10# socket
wrench.
If the heat exchanger core is seriously
damaged, replace it.
Clean the heat exchanger core. (When
checking the heat exchanger core on the
upper layer, enter the compressor
compartment, push the upper door to
the upper layer, and enter the upper
layer.)
Remove the rust.
107