7.8 Transferring from Maintenance Bypass Mode to
Inverter Mode
Before you transfer the UPS from the bypass mode to inverter mode, ensure that
the bypass input is normal.
Step 1 Turn o the external maintenance bypass switch. The Maint. breaker closed
alarm disappears. View the system running diagram on the LCD or WebUI to
check whether the system works in bypass mode.
Step 2 Start the inverter. Choose Common Functions > Inv. ON. The system transfers to
inverter mode.
----End
7.9 Performing EPO
● Choose Monitoring > UPS System > Running Parameter > System Settings
on the WebUI and set EPO detection to Enable.
● After you press the EPO switch, the UPS supplies no power, and the loads
powers o.
● If the UPS is in maintenance bypass mode, the UPS still supplies power after
you press the EPO switch.
Step 1 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. The UPS enters the
emergency shutdown state. EPO and No power supplied alarms are displayed.
Figure 7-16 EPO port
----End
7.10 Clearing the EPO State
UPS5000-H-(400 kVA-600 kVA)
User Manual (100 kVA Power Module) 7 System Commissioning
Issue 01 (2020-11-30) Copyright © Huawei Technologies Co., Ltd. 84
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