Huawei NetCol5000-A035 User Manual page 166

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width)
Compon
ent
Pipe
Indoor
fan
Electric
heater
Issue 17 (2020-10-22)
Item
The color of the sight glass
(as shown in Figure 6-1) is
near green, or not completely
turns yellow.
Touch the compressor angle
valves (as shown in Figure
6-1), 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.
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.
The electric heater surface is
not eroded, dirtied, or blocked.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Troubleshooting
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.
NOTE
If the sight glass does not obviously
turn green, use a blow drier to blow
wind to the filter until the sight glass is
green.
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, see
Commissioning Procedure.) 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 form
if it is damaged or missing.
Replace the fan by referring to
Replacing a Indoor Fan.
Take out the foreign matter.
Tighten the screws using a 10#
socket wrench.
Replace the electric heater by
referring to 6.5.8 Replacing Electric
Heater.
5.5
6.5.2
156