4.2.2.9 Replacing the Welded Filter Dryer (Welding Connection)
Prerequisites
● The lter dryer needs to be replaced.
● A spare lter dryer of the same model is available and functional.
● Tools: welding equipment, refrigerant retrieval device
(congured based on
local conditions), Phillips screwdriver, nitrogen cylinder, refrigerant tank,
vacuum pump, pressure gauge, leather hose, protective gloves
● Preparation: Power
o the indoor unit and reclaim all refrigerant from the
system.
Context
Figure 4-27 shows the position of the
lter dryer.
Figure 4-27 Position of the lter dryer
(1) Liquid pipe NTC
temperature sensor
(2) Welding point A (3) Filter dryer
(4) Welding point B (5) Welding point C
Procedure
Step 1 Tap Shutdown on the LCD home screen and turn
o the smart cooling product
switch in the PDC and the compressor switch QF3.
FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario) 4 Parts Replacement
Issue 01 (2021-04-20) Copyright © Huawei Technologies Co., Ltd. 86
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