Huawei FusionDC1000A Maintenance Manual page 95

FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario)
Exercise caution because the NetCol5000-A is still energized when it is being shut
down over the LCD.
Step 2 Recycle the refrigerant from the low-pressure needle valve and exhaust pipe
needle valve to ensure that there is no pressure in the system. (If a low-
temperature component is used, recycle the refrigerant from the liquid pipe needle
valve, low-pressure needle valve, and exhaust pipe needle valve.)
Step 3 Remove the liquid pipe NTC temperature sensor shown by (1) in
Step 4 Remove the filter dryer, as shown in
● Use copper welding rods to weld the connection ports and check that the
welding joints are in good condition, without poor soldering.
● To avoid burning the internal components, other pipes, thermal insulation
foam, power cables, and labels, take protective measures, such as spreading
wet cloth, around the welding position.
● Do not use face-down bonding.
Figure 4-28 Removing the filter dryer
1.
Issue 01 (2021-04-20)
NO TICE
NO TE
Reclaim or dispose of the refrigerant in accordance with local laws and regulations. Do not
discharge the refrigerant to the atmosphere.The composition of R410A may change during
the recycling process. Therefore, you are not advised to refill the refrigerant to the cooling
system.
NO TICE
Remove the hold hoop from the filter dryer using a Phillips screwdriver.
Copyright © Huawei Technologies Co., Ltd.
Figure 4-28.
4 Parts Replacement
Figure 4-27.
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