Huawei UPS2000-G-6KRTLL Quick Manual page 17

Alarm Alarm Severity
ID Name
23 Lithium Minor
battery
low
voltage
protecti
on
24 Lithium Minor
battery
overcur
rent
protecti
on
25 Lithium Minor
battery
fault
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Clearance
Condition
The cell or
battery
string
voltage
rises above
the
protection
threshold.
The battery
discharge
current
drops below
the
protection
threshold.
The alarm is
not cleared.
After
batteries
are reset,
check the
status
again.
Trigger Impact on
Condition the System
The lithium The internal
battery voltage switch circuit
is less than 44 of the
V. lithium
The minimum battery is
cell voltage is disconnected,
less than 2.5 V. and the
battery
cannot be
charged or
discharged.
Discharge The internal
current ≥ 0.93 switch circuit
times of the of the
current limit lithium
and Vbus ≤ 40 battery is
V for 15s disconnected,
Discharge and the
current ≥ 0.98 battery
times of the cannot be
current limit charged or
and Vbus < 17 discharged.
V for 8s
The cell voltage The internal
sampling circuit switch circuit
is faulty. of the
The cell lithium
temperature battery is
sampling circuit disconnected,
is faulty. and the
The cell voltage battery
is too high or cannot be
too low. charged or
The cell discharged.
temperature
increases
abnormally.
The cell voltage
is severely
unbalanced.
BMS board
circuit fault
17
Suggestion
Possible cause: The
mains power has
failed and not been
recovered for a long
time. 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: The
UPS is overloaded.
The number of
working batteries is
insufficient.
Measure: Reduce the
load. Add batteries.
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.