User's Manual

Options Operation
10-3
10.2 Battery charger (NBB-724)
CAUTION
The batteries, except for sealed lead-acid batteries that require no
equalization, should be carried out the equalizing charge at least every six
months
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1. AC breaker ·················· When turned on, enables to use the AC mains input.
2. BATT breaker ··············· When turned on, connects the internal circuit to the battery,
and after that turning on the AC breaker enables charging of
the battery. Note that if detected over discharge of the
battery (approx. 19.5V), this breaker trips automatically.
3. BATT LOW alarm lamp ··· This lamp turns on and the buzzer sounds to indicate low
voltage of the battery (approx. 21.5V).
4. CHG alarm lamp ·········· This lamp turns on (or blinks*) and the buzzer sounds to
indicate any one of the following alarms.
・ The BATT breaker is OFF while the AC breaker is ON.
・ Over voltage (equalizing charge voltage + 1.0V)
・ High temperature of the charging circuit (+75℃ ) *
5. FLOAT charge lamp ······ This lamp turns on during the floating charge operation.
6. EQUAL charge lamp ····· This lamp turns on during the equalizing charge operation.
7. CHARGE mode switch ···· Changes the charge mode between floating and equalizing charge.
8. Dimmer control ············ Adjusts the dimmer level.
9. Current meter ·············· Indicates the charge current (+) or discharge current (-).
10. Voltage meter ·············· Indicates the output voltage of the battery.
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