UPS2000-G-(1 kVA-3 kVA) 
User Manual 
 
Copyright © Huawei Technologies Co., Ltd. 
 
 
4.6 Operating Modes 
Table 4-5 Operating mode description 
When the input voltage is in the 
acceptable range, the UPS works 
in normal mode, supplies stable 
sine wave AC output current, 
while charging batteries. 
When the input voltage is in the 
preset range, the UPS transfers to 
bypass mode to save energy. 
Frequency conversion 
mode 
When the input frequency is in the 
acceptable range, the UPS sets the 
output frequency to 50 Hz or 60 
Hz and, while charging batteries. 
When the input voltage is 
abnormal or an outage occurs, the 
UPS transfers to battery mode. 
The buzzer beeps once every 4 
seconds. The UPS uses batteries to 
supply power. 
When the UPS works in online 
mode and is overloaded, it will 
enter the bypass mode if the input 
voltage is in an acceptable range. 
If the UPS is set to be enables the 
bypass mode, the UPS 
automatically transfers to bypass 
mode after connecting to the 
mains. 
When the UPS works in bypass 
mode, the buzzer beeps once every 
10 seconds.