Replacing The Differential Pressure Switch - Huawei FusionDC1000A Maintenance Manual

FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario)
Step 7 Remove the waterproof connector from the spare fan, as shown by (2) in
Removing the fan and
waterproof connector delivered with the spare fan. The torque must be 3.75 N·m.
Step 8 Install the new fan in the sequence from
Step 9 After re-power on, on the home screen of the indoor unit, choose Maint >
Diagnostic Mode > Enter, and set the outdoor unit speed to 100%. After the
outdoor unit has run for 5 minutes, check that the outdoor fan is running properly
and no alarm is raised.
Step 10 After confirmation, set the outdoor unit speed to 0% and exit from the diagnostic
mode.
----End

4.2.2.6 Replacing the Differential Pressure Switch

Prerequisites
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Context
The differential pressure switch can be maintained only from the rear door.
Procedure
Step 1 On the controller home screen, tap Shutdown, and turn off the smart cooling
product switch in the upstream PDC.
Exercise caution because the device is still energized after it is shut down on the
controller home screen.
Step 2 Open the rear door and remove the air filter.
Step 3 Remove the pressure inlet tube, as shown by (1) in
Issue 01 (2021-04-20)
guard. Use a torque wrench to replace the hexagonal
The differential pressure switch needs to be replaced.
A spare differential pressure switch of the same model is available and
functional.
Tool: Phillips screwdriver
NO TICE
Copyright © Huawei Technologies Co., Ltd.
Step 6 to Step 2.
Figure 4-22.
4 Parts Replacement
Figure
79