Replacing A Differential Pressure Switch - Huawei NetCol5000-A050 User Manual

NetCol5000-A050 In-row Air Cooled Smart Cooling
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User Manual
Step 6 Remove the waterproof connector from the new fan and replace it with the
waterproof connector delivered with the spare fan. The required torque is 3.75
N·m.
Step 7 Install the new fan assembly, connect and secure cables, and install the connection
box cover.
Step 8 Turn on the fan switch and close the electric control box of the outdoor unit.
Step 9 Power on again, install the air filter, and close the rear door.
Step 10 After startup, choose Maintenance > Diagnostic Mode > Enter on the home
screen of the indoor unit display module, set the outdoor unit speed to 100%, run
the outdoor unit for 5 minutes, and check that the outdoor fan runs properly and
no alarm is generated.
Step 11 After confirmation, set the outdoor unit speed to 0% and exit the diagnostic
mode.
----End

11.4 Replacing a Differential Pressure Switch

Prerequisites
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Context
The differential pressure switch needs to be maintained from the rear door.
Procedure
Step 1 Tap Shutdown on the home screen of the display module.
Exercise caution because the device is still energized after it is shut down on the
home screen of the display module.
Step 2 Open the rear door and remove the air filter.
Step 3 Turn off the active power switch QF1 and standby power switch QF2. (For the
model with a single power supply, you do not need to turn off QF2.)
Step 4 Remove the pressure inlet tube.
Step 5 Remove the screws on the top cover of the differential pressure switch and cable
screws using a Phillips insulated torque screwdriver and remove the cables.
Issue 13 (2023-08-20)
A differential pressure switch needs to be replaced.
A spare differential pressure switch of the same model is available and
functional.
Tool: Phillips insulated torque screwdriver
NO TICE
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