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iBAT 2.0-CIM01C2
User Manual
Alarm Name
Float volt. Incon.
Issue 07 (2019-01-02)
Alarm Severity
Minor
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
The battery float voltage is
above the upper threshold
or below the lower
threshold.
9 Maintenance
Solution
1. Check that new and old
batteries do not coexist in
the same battery string.
Mark abnormal batteries.
2. Compare the float
charging voltage of the
abnormal battery and that
of the normal battery.
Mark abnormal batteries.
3. Compare the internal
resistance of the
abnormal battery and that
of the normal battery.
Mark abnormal batteries.
4. Prepare the UPS backup
power supply. Then
perform a shallow
discharge test and
manually charge the
battery in equalized
mode. Ensure that the
abnormal battery is fully
charged and turns to float
charging mode. Then
check whether the float
charging voltages of the
batteries in the abnormal
battery string are
consistent. Mark
abnormal batteries.
5. Fully charge the battery
string and prepare the
UPS backup power
supply. Then perform a
capacity test to query the
SOH of the battery. If the
SOH is abnormal, replace
the abnormal battery.
63
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