UPS2000-A-(6 kVA-10 kVA)
User Manual
5 Operations
Issue 04 (2019-05-05)
Copyright © Huawei Technologies Co., Ltd.
84
Step 4
(This step is required only for the UPS with long backup time.) If the battery loop has a circuit
breaker, open the external battery circuit breaker; if the battery loop does not have a circuit
breaker, disconnect battery cables.
----End
5.2.3 Performing EPO
Turn on the EPO switch (provided by the customer). The UPS enters the EPO state. That is,
the inverter shuts down, and the UPS will not transfer to bypass mode.
Figure 5-18 shows the EPO cable connection on a single UPS.
Figure 5-18
EPO cable connection on a single UPS
Connect an external switch to the EPO port on the UPS. After you turn on the switch, the inverter
shuts down, and the UPS will not transfer to bypass mode. Output terminals completely power off,
which meets the EPO purpose.
The external EPO switch (switch or dry contact signals controlled by a switch) is provided by the
customer.
After performing EPO, 55-1 critical alarm generated. When EPO expired, choose
CTR
>
ALR
CLR
clears ADMC alarms on LCD, as shown in Figure 5-19.
