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UPS2000-G-3KRTLL
User Manual
Alarm
Alarm
ID
Name
41
Lithium
battery
high
voltage
protecti
on
43
Lithium
battery
fault
Issue 01 (2020-10-26)
Seve
Clearance
rity
Condition
Mino
The cell
r
or battery
string
voltage
drops
below the
protection
threshold.
Mino
The alarm
r
is not
cleared.
After
batteries
are reset,
check the
status
again.
Copyright © Huawei Technologies Co., Ltd.
Trigger
Impact
Condition
on the
Syste
m
● The busbar
The
voltage is
interna
greater than
l
59.4 V in
switch
charging
circuit
state.
of the
lithium
● The
battery
maximum
is
cell voltage is
discon
greater than
nected,
3.8 V.
and
NOTE
the
Considering
battery
cell
cannot
difference,
be
the
maximum
charge
cell voltage
d or
can be 3.9 V.
dischar
● The battery
ged.
string
voltage is
greater than
55 V.
The cell voltage
The
sampling circuit
interna
is faulty.
l
switch
The cell
circuit
temperature
of the
sampling circuit
lithium
is faulty.
battery
The cell voltage
is
is too high or
discon
too low.
nected,
The cell
and
temperature
the
increases
battery
abnormally.
cannot
be
The cell voltage
charge
is severely
d or
unbalanced.
dischar
BMS board
ged.
circuit fault
4 Control Panel
Suggestion
Possible cause: The busbar
voltage input is abnormal
and exceeds the normal
range. The cell consistency is
abnormal. The capacity
attenuation is too fast or the
internal resistance is too
large.
Measure: If the lithium
battery cannot be recovered
due to protection against
abnormality, contact local
Huawei engineers to rectify
the fault.
Possible cause: sampling
fault (see the telecom
power manual); cell or
equalization circuit fault;
charger converter short-
circuit, relay fault; switch
tube fault
Measure: Restart the lithium
battery. If the fault persists,
replace the lithium battery.
76
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