Huawei SmartACU2000B Quick Manual page 28

9
Closing the Cabinet Door
1. Install the support bar.
If the screws used for securing the cabinet door are lost, use the security torx screws in the fitting
bag.
10
FAQ
10.1 How Should I Power Off the System Before Maintenance?
DANGER
Put on insulation gloves before powering off the system.
1. Turn off the single-phase power switch that controls the power supply from the remote box-type
transformer to the smart array controller.
2. Turn off the three-phase power switch that controls the power supply from the remote box-type
transformer to the smart array controller.
If the smart array controller supports the access of one PLC route, turn off one three-phase

power switch.
If the smart array controller supports the access of two PLC routes, turn off two three-phase

power switches.
3. Turn off the DC input and output switches on the smart array controller.
If the smart array controller does not support 24 V DC input or output, skip this step.

If the smart array controller supports 24 V DC input and output, turn off the QF06 DC output

switch and QF07 DC input switch.
4. Turn off the QF01 single-phase input switch on the smart array controller.
5. Turn off the three-phase input switch on the smart array controller.
If the smart array controller supports the access of one PLC route, turn off the QF02 (or FU01)

three-phase input switch.
If the smart array controller supports the access of two PLC routes, turn off the QF02 and

QF04 three-phase input switches.
10.2
How Should I Determine an Unavailable Single-/Three-Phase SPD?
If an SPD is damaged or its indication window is red, the SPD is deemed unavailable.
2. Close the cabinet door and tighten the screws.
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