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UPS2000-G-3KRTLL
User Manual
Alarm
Alarm
ID
Name
84
Inconsi
stent
AC
input
voltage
and
frequen
cy
87
EPO
trigger
ed
Issue 01 (2020-10-26)
Seve
Clearance
rity
Condition
Critic
The
al
voltage
difference
is less
than 20 V
or the
UPS is set
to
standalon
e mode.
Critic
The EPO
al
open-
circuit
status
needs to
be
restored
and the
alarm
needs to
be
manually
cleared.
Copyright © Huawei Technologies Co., Ltd.
Trigger
Impact
Condition
on the
Syste
m
The mains
The
voltage
system
deviation
shuts
between UPSs
down
in a parallel
the
system ranges
inverte
from 40 V to
r and
100 V for 120
transfe
ms.
rs to
bypass
mode.
If other
UPSs in
the
parallel
system
can
deliver
output
in
inverte
r
mode,
the
UPS
that
has
genera
ted the
alarm
deliver
s no
output.
The EPO port is
The
short-circuited.
system
switche
s off
the
output
and
enters
the
fault
mode.
4 Control Panel
Suggestion
Possible cause: The UPSs do
not share one mains supply.
Measure: Ensure that all
UPSs share one mains
supply.
Check and restore the EPO
port status.
90
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