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.)
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 rell the refrigerant to the cooling
system.
Step 3 Remove the liquid pipe NTC temperature sensor shown by (1) in Figure 4-27.
Step 4 Remove the
lter dryer, as shown in Figure 4-28.
● 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 lter dryer
1. Remove the hold hoop from the lter dryer using a Phillips screwdriver.
FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario) 4 Parts Replacement
Issue 01 (2021-04-20) Copyright © Huawei Technologies Co., Ltd. 87
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