Compon
ent
Item Troubleshooting
Pipe The color of the sight glass
(as shown in Figure 6-1) is
near green, or not completely
turns yellow.
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
lter until the sight glass is
green.
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.
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 5.5
Commissioning Procedure.) If the
pressure is beyond the normal
range, contact Huawei technical
support.
No water exists under the
water pipe or on the thermal
insulation foam.
● If drops of water are evenly
distributed, wipe o 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.
The thermal insulation foam is
properly laid out along the
pipe.
Replace the thermal insulation form
if it is damaged or missing.
Indoor
fan
The indoor fan guard is not
deformed, and the fan blades
are not damaged.
Replace the fan by referring to 6.5.2
Replacing a Indoor Fan.
The indoor fan runs smoothly. Take out the foreign matter.
The screws on the indoor fan
are not loose or distorted.
Tighten the screws using a 10#
socket wrench.
Electric
heater
The electric heater surface is
not eroded, dirtied, or blocked.
Replace the electric heater by
referring to 6.5.8 Replacing Electric
Heater.
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 6 System Operation and Maintenance
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 156
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