6
4
Verifying the Installation
No. Item Result
1
Input circuit breakers and load circuit 
firmly connected. The voltage difference between a 
neutral wire and a ground cable is less than 5 V AC.
resistance between the UPS ground terminal and the equipment room 
ground bar, which must be less than 0.1 ohm. 
Cables and terminals are securely connected.
Power cables and signal cables are correctly identified.
terminals L and N are correctly connected. Use a multimeter 
to measure the input and output, which must be free from any 
supply voltage is 120–280 V AC during power-on (80–280 V 
-on). The battery voltage is greater than the number of 
batteries multiplied by 10.8 V DC.
UPS with long backup time, battery cables and terminals are 
connected correctly, and voltages comply with industry standards.
UPS with long backup time, the UPS is properly connected to 
□ Passed □ Failed
5
Powering On and Starting the UPS
• On the default screen in inverter mode, hold down ESC for more than 
5 seconds. Release the button when you hear a beep tone. The 
inverter shuts down.
On any other screen, press ESC to return to the upper-level menu 
(the default screen is the upper-level screen for the main menu 
screen).
Press ▲ or ▼ to scroll upward or downward.
You can set a value by using the list or step increase or decrease.
Startup/Enter/
Battery Self
• On the default screen in bypass mode, hold down         for more than 
5 seconds. Release the button when you hear a beep tone. The UPS 
starts.
On the default screen, press        . The main menu is displayed. On 
any menu screen, press         . The lower-level menu is displayed. If 
the menu is the last level, an information screen is displayed.
On the default screen in normal mode, hold down         for more 
than 5 seconds. Release the button when you hear a beep tone. The 
battery self-check starts.
When the buzzer buzzes, hold down         for 2–5 seconds. The 
buzzer is muted when you release the button. After the buzzer is 
muted, the alarm tone is unrecoverable unless a new alarm is 
generated.
1. User interface (UI) snapshots shown in this document correspond to V100 and are for 
reference only. If any UI changes are made, contact Huawei technical support to obtain the 
latest snapshots.
2. For details about the letter and LCD display mapping, and alarm handling, see the appendix.