Note 5: When set to 9999 seconds, the BS signal is disabled.
3-5 Charging the battery
The battery automatically starts charging when the unit is connected to a commercial
power source.
(This occurs regardless of whether the power switch is ON or OFF.)
The charging takes 8 hours to complete. And every time an expansion battery unit is
connected, the charging time is increased by 16 hours for each unit.
● The unit was charged before shipment, but it may have self-discharged during shipment,
resulting in a reduced backup time. We recommend charging the unit before use.
3-6 Measuring the initial value of backup time
● The initial backup time value measured in your environment of use can be used as a
guide when checking the battery and deciding the shutdown software setting values.
“4-3. Measuring the backup time” → Page 96
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