Alpha Technologies APU Control Module (ACM) User Manual
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018-340-B0-001 Rev. A
Battery Safety Notes
Always refer to the battery manufacturer’s recommendation for selecting correct “FLOAT” and “ACCEPT”
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charge voltages. Failure to do so can damage the batteries.
Verify the Power Supply’s battery charger “FLOAT” and “ACCEPT” charger voltage settings.
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Batteries are temperature sensitive. During extremely cold conditions, a battery’s charge acceptance
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is reduced and requires a higher charge voltage; during extremely hot conditions, a battery’s charge
acceptance is increased and requires a lower charge voltage. To compensate for changes in temperature,
the battery charger used in the power supply is temperature compensating.
If the batteries appear to be overcharged or undercharged, fi rst check for defective batteries and then
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verify the correct charger voltage settings.
To ensure optimum performance, inspect batteries every three to six months for signs of cracking,
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leaking, or unusual swelling (note that some swelling is normal).
Check battery terminals and connecting wires. Clean battery terminal connectors periodically and
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retighten to approximately 50 inch-pounds (or to manufacturer’s specifi cations if not AlphaCells). Spray
the terminals with an approved battery terminal coating such as NCP-2.
Check battery voltages UNDER LOAD. Use a load tester if available. Differences between any battery in
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the set should not be greater than 0.3Vdc.
Refer to the battery manufacturer’s recommendation for correct charger voltages and the power supply
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operation manual for corresponding charger settings.
Number the batteries (1, 2, 3, etc.) inside the enclosure for easy identifi cation (refer to the appropriate
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enclosure installation guide).
Establish and maintain a battery maintenance log.
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If installed, disconnect the AlphaGuard prior to measuring battery voltage.
NOTE:
Even with a AG-CMT present in the system, any battery which fails the 0.3V load test must be replaced with
an identical type of battery.
NOTE: