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5
Operation
5.1
Transferring to Maintenance Bypass
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.
5.2
Transferring to UPS Protection
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.
5.3
Status & Indicators
Status
1. The mains is normal.
2. The mains fails but UPS is providing power.
The mains fails.
Slave On Indicator (Yellow) and Slave
Output Status
Master/slave
function is enabled
Master/slave
function is disabled
Slave On indicator
Slave output
Slave On indicator
Slave output
Master Load > 30 W
On
On
On
On
HUAWEI TECHNOLOGIES CO., LTD.
Huawei Industrial Base, Bantian, Longgang
4
Power Indicator (Green)
On
Off
Master Load < 10 W
Off
Off
On
On
Shenzhen 518129
People's Republic of China
www.huawei.com
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