NEC ALM 12V7 s-Series, Руководство пользователя

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ALM
®
12V7 s-Series User’s Guide Chapter 6: Troubleshooting
406014-02EN, Rev. 05 © 2016 NEC Energy Solutions, Inc. All rights reserved. Page 45 of 49
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Table 17 ALM12V7s HP Troubleshooting and Solutions
Problem Possible Cause(s) Solution(s)
The battery does not deliver the
expected Ah (capacity).
1. The battery is out‐of‐balance.


2. The battery has reached the end of
its useful service life.

3. The battery overheated due to
ambient temperature or C-Rate.
1. Apply a float charge for 48 hours to balance
the battery cells.

2. Replace the battery.


3. Reduce the ambient temperature or C-Rate.
Charge current suddenly goes to zero
while connected to a source.
1. The battery overheated, enabling
over‐temperature protection.
2. The battery is out‐of‐balance.




3. Charge current is too high,
exceeding OCP protection.
a
1. Allow the battery to cool.

2. Apply a float charge for 48 hours to balance
the battery’s cells. For more details on
charging battery, batteries, or strings, refer to
Charging Single Batteries on page 33 and
Charging Multiple Batteries on page 36.
3. Reduce charge current.
Voltage drops abruptly while in use
after appearing constant.
1. The battery is fully discharged.
2. OCP has engaged
1. Perform a charge cycle.
2. Reduce the load.
Low or zero volts across the terminal
1. The battery is in UVP or UVLO.
2. The battery is in OTP.
1. Perform a charge cycle.
2. Allow the battery to cool.
a.
High-speed OCP occurs in10 μs so it will not be visible on a digital volt meter.