Huawei UPS5000-A - Page 158

No. Check Item Acceptance Criteria Check Method and
Troubleshooting
Check
Interval
4 Battery
voltage
● Equalized charging
voltage: 2.35 V/cell
±0.02 V/cell
● Float charging voltage:
2.25 V/cell±0.02 V/cell
● Inspection method: (1)
Visual inspection. Check
the parameters
displayed on the UPS
LCD. (2) Measure.
Measure the battery
internal resistance
using an internal
resistance tester.
● Troubleshooting: Check
the equalized charging
voltage, oat charging
voltage, and internal
resistance of a single
battery. If the battery
charging voltage
exceeds the threshold,
perform a complete
forced equalized
charging for the battery
string and check the
battery string voltage.
Quarterly
5 Battery string
voltage
● Equalized charging
voltage (2.35 V/cell
±0.02 V/cell) x Voltage
of a single battery/2 x
Number of batteries in
a battery string
● Float charging voltage
(2.25 V/cell±0.02 V/
cell) x Voltage of a
single battery/2 x
Number of batteries in
a battery string
● Inspection method: (1)
Visual inspection. Check
the parameters
displayed on the UPS
LCD. (2) Measure. Use
a multimeter to
measure the output
voltage of the battery
string.
● Troubleshooting:
Correct the equalized
charging voltage and
oat charging voltage
of the UPS. If the
dierence between the
battery string voltage
displayed on the UPS
LCD and the measured
value is greater than
1%, contact technical
support.
Quarterly
UPS5000-A-(30 kVA-120 kVA)
User Manual 7 Maintenance
Issue 17 (2024-02-21) Copyright © Huawei Digital Power Technologies Co., Ltd. 149