Alarm
ID
Alarm
Name
Seve
rity
Clearance
Condition
Trigger
Condition
Impact
on the
Syste
m
Suggestion
84
Inconsi
stent
AC
input
voltage
and
frequen
cy
Critic
al
The
voltage
difference
is less
than 20 V
or the
UPS is set
to
standalon
e mode.
The mains
voltage
deviation
between UPSs
in a parallel
system ranges
from 40 V to
100 V for 120
ms.
The
system
shuts
down
the
inverte
r and
transfe
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.
Possible cause: The UPSs do
not share one mains supply.
Measure: Ensure that all
UPSs share one mains
supply.
87
EPO
trigger
ed
Critic
al
The EPO
open-
circuit
status
needs to
be
restored
and the
alarm
needs to
be
manually
cleared.
The EPO port is
short-circuited.
The
system
switche
s off
the
output
and
enters
the
fault
mode.
Check and restore the EPO
port status.
UPS2000-G-3KRTLL
User Manual
4 Control Panel
Issue 01 (2020-10-26)
Copyright © Huawei Technologies Co., Ltd.
90
