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Options Operation
10.2 Battery charger (NBB-714)
When replacing fuses, always use fuses of the same type.
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1. 10A fuse ····················· AC mains fuses (2pcs)
2. AC switch ···················· Turns on the AC mains power supply.
3. BATT LOW/HIGH lamp ···· This lamp turns on and the buzzer sounds to indicate low
4. AC FAIL/ CHG ALARM ···· This lamp turns on and the buzzer sounds to indicate any one
5. Current meter ··············· Indicates the charge current (+) or discharge current (-).
6. ALM MUTE switch ········· Silences the active alarm buzzer sound.
7. Alarm buzzer
8. Voltage meter ··············· Indicates the output voltage of the battery.
9. Dimmer control ············· Adjusts the dimmer level of alarm lamps.
10. BATT breaker ··············· When turned on, connects the internal circuit to the battery,
10-2
CAUTION
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voltage of the battery (approx. 21.5V). And also turns on and
the buzzer sounds to indicate overvoltage of the battery
(approx. 32.2 ~ 37.0V) and then, turns off the BATT breaker.
of the following alarms.
・ While the BATT breaker is ON, the AC switch is OFF or any
AC fails such as the power failure or the blowout of fuses.
・ While the AC switch is ON, the BATT breaker is OFF.
・ Over discharge detection (16V or less)
Note) If AC input is ON, charging is available without
tripping the breaker.
・ Overheat detection (+80C)
Note) Unable to turn off completely.
and after that turning on the AC breaker enables charging of
the battery.
battery (approx. 19.5V), this breaker trips automatically.
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Note that if detected over discharge of the
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