UPS5000-S-1200 kVA
User Manual
5 Operations
Issue 04 (2019-06-25)
Copyright © Huawei Technologies Co., Ltd.
176
5.8 Transferring from Maintenance Bypass Mode to
Normal Mode
Prerequisites
The maintenance bypass unit has been installed.
Before you transfer the UPS from maintenance bypass mode to normal mode, ensure that the
bypass input and output are normal.
Procedure
Step 1
Turn off the maintenance bypass switch.
The
Maint. breaker closed
alarm disappears from the MDU.
Step 2
Start the inverter.
----End
5.9 Performing EPO
After the EPO button is turned on, the UPS supplies no power and the loads shut down.
In maintenance bypass mode, the UPS continues to supply power even after the EPO
button is turned on.
Press the external EPO switch that connects to the dry contact card or remove the 4-pin
terminal on the EPO port of the dry contact card of the bypass unit.
Figure 5-16
EPO ports
After you press the EPO button, the
EPO
and
No power supplied
alarms are displayed on the
LCD.