UPS5000-E-(25 kVA-125 kVA)-FM
User Manual
5 Operations
Issue 06 (2019-12-13)
Copyright © Huawei Technologies Co., Ltd.
203
5.8 Transferring from Maintenance Bypass Mode to
Normal Mode
Context
Before transferring the UPS from maintenance bypass mode to normal mode, ensure that the
bypass input and output are normal.
Procedure
Step 1
Open the maintenance bypass switch.
The
Maint. breaker misoperation
and
Maint. Breaker closed
alarms disappear from the
alarm list. Check whether the UPS works in bypass mode by viewing the system running
status diagram on the LCD or WebUI.
If the stopper or barrier of the maintenance bypass switch is configured, reinstall the stopper or barrier
on the maintenance bypass switch.
Step 2
Start UPS inverters.
----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.