Routine Maintenance - Huawei NetCol5000-A035 Quick Manual

15

Routine Maintenance

Component Monthly Maintenance Item
Air filter The air filter surface is free of accumulated
dust, damage, and deformation.
Compressor The compressor generates no abnormal
noises, such as metal friction noise.
Run the indoor unit and check that the oil
level is stably above 1/3 of the oil sight glass
and that no dense white bubbles cover the
entire glass surface.
Humidifier The humidifier interior wall is free from large
quantity of water scale.
Pipe The color of the sight glass is near green, or
not completely turns yellow.
Touch the compressor angle valves, needle
valves, and welding spots of the refrigerant
pipe with your hands protected by a pair of
protective gloves to check for oil stains.
No water exists under the water pipe or on
the thermal insulation foam.
The thermal insulation foam is properly laid
out along the pipe.
Indoor fan The indoor fan guard is not deformed, and
the fan blades are not damaged.
The indoor fan runs smoothly.
The screws on the indoor fan are not loose
or distorted.
Electric heater The electric heater surface is not eroded,
dirtied, or blocked.
Humidity and Humidity and temperature sensors in smart
temperature cooling products and aisles are securely
sensor installed.
Water sensor The water sensor is secure, and the two
downward metal conductive plates do not
interfere with each other or corrode.
For quarterly and yearly maintenance, see the chapter of system operation and maintenance in
NetCol5000-A(025, 035) In-row Air Cooled Smart Cooling Product User Manual (600 mm Width).
Troubleshooting
Replace the air filter. Huawei recommends replacing the
air filter once every six months.
Slightly shake the compressor and touch the four
anchor bolt to check whether they are loose. If they are
loose, tighten them using a 13# solid wrench. If the
problem persists, contact Huawei technical support.
Add Refrigerant oil. For details, contact Huawei
technical support.
Replace the humidifier. Huawei recommends replacing
the humidifier once every six months.
If the sight glass completely turns yellow, water is too
much in the pipe. To solve the problem, empty
refrigerant out of the pipe, vacuumize the pipe, drain
out water, and then charge new refrigerant.
If there is an oil stain, check whether the suction
pressure 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 thermal insulation foam if it is damaged or
missing.
Replace the fan.
Take out the foreign matter if the fan does not run
smoothly.
Tighten the screws using a 10# socket wrench.
Replace the electric heater.
Secure the sensors again.
Replace the water sensor.
Huawei Technologies Co., Ltd.
Huawei Industrial Base, Bantian, Longgang
Shenzhen 518129 People's Republic of China
27
www.huawei.com