Alarm
ID
Alarm
Name
Seve
rity
Clearance
Condition
Trigger
Condition
Impact
on the
Syste
m
Suggestion
08
High
bus
voltage
Critic
al
When the
bus
voltage is
lower
than 360
V, the
alarm can
be
automatic
ally
cleared
for two
times.
After that,
you need
to
manually
clear the
fault or
power off
and
restart the
device.
The bus voltage
is greater than
450 V for 200
ms or greater
than 470 V for 1
ms.
The
system
shuts
down
the
inverte
r and
transfe
rs to
bypass
mode.
● Possible cause: Power
grid surge occurs.
Measure: Improve the power
grid quality.
● Possible cause: The
parallel cable is
disconnected when UPSs
are connected in parallel.
Measure: Check that the
parallel cable and current
equalization cable are
properly connected.
● Possible cause: The circuit
is faulty.
Measure: Send the device to
the maintenance center.
09
Bus
short-
circuit
Critic
al
You need
to
manually
rectify the
fault or
power off
and
restart the
device.
The bus soft-
start time
exceeds 15s.
The
system
cannot
start
inverte
r
output
and
transfe
rs to
bypass
mode.
Possible cause: The circuit is
faulty.
Measure: Send the device to
the maintenance center.
12
Manual
bypass
activat
ed
Mino
r
The open-
circuit
status of
the
manual
bypass is
restored.
The manual
bypass port is
short-circuited.
The
system
transfe
rs to
bypass
mode.
Restore the open-circuit
status of the manual bypass
port.
UPS2000-G-3KRTLL
User Manual
4 Control Panel
Issue 01 (2020-10-26)
Copyright © Huawei Technologies Co., Ltd.
64
