4
Operation
Transferring to Maintenance Bypass
5.1
Status & Indicators
5.3
Status
Power Indicator (Green)
1. The mains is normal.
2. The mains fails but UPS is providing power.
On
The mains fails.
Off
Transferring to UPS Protection
5.2
HUAWEI TECHNOLOGIES CO., LTD.
Huawei Industrial Base, Bantian, Longgang
Shenzhen 518129
People's Republic of China
www.huawei.com
5
Before transferring to maintenance bypass, ensure that the Power indicator is on. Transfer the
rotary bypass switch from UPS to MBS. At this time, all connected devices are powered by the
mains directly. Turn off the UPS and disconnect two cables connected to the UPS. Then you
can maintain the UPS.
After maintaining the UPS, ensure that the UPS operates properly. Reconnect the UPS to the
unit by following the installation section. Verify that the Power indicator is on. Turn on the UPS,
then transfer the rotary bypass switch from MBS to UPS. All connected devices are protected by
the UPS.
Slave On Indicator (Yellow) and Slave
Output Status
Master Load > 30 W
Master Load < 10 W
Master/slave
function is enabled
Slave On indicator
On
Off
Slave output
On
Off
Master/slave
function is disabled
Slave On indicator
On
On
Slave output
On
On
