Huawei NetCol5000-A050 User Manual page 156

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual (1350 mm Depth)
Item
Indoor fan
Issue 04 (2022-12-15)
Expected Result
The liquid sight glass is almost
green, or not totally turns
yellow.
Wear protective gloves and
touch the compressor angle
valve, needle valve, and
welding joints of 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 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.
Copyright © Huawei Digital Power Technologies Co., Ltd.
8 System Maintenance
Troubleshooting
If the sight glass has
completely turned yellow,
there is too much water in the
pipe. To solve the problem,
empty refrigerant in the pipe,
vacuumize the system, drain
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 are oil stains, check
whether the suction and
discharge pressure of the
compressor is within the
normal ranges. If the pressure
is beyond the normal range,
contact technical support.
● If drops of water are evenly
distributed, wipe off them
with dry cloth.
● If there are large water
marks, close the water inlet
sluice and handle the
leaking points. If the
thermal insulation foam is
damaged or missing, install
new thermal insulation
foam.
Replace the pipe support and
secure it again.
Replace the fan.
Take out the foreign matter.
Tighten loose screws.
146