Options Operation
10-2
10.2 Battery charger (NBB-714)
CAUTION
When replacing fuses, always use fuses of the same type.
1. 10A fuse ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ AC mains fuses (2pcs)
2. AC switch ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Turns on the AC mains power supply.
3. BATT LOW/HIGH lamp ꞏꞏꞏꞏ This lamp turns on and the buzzer sounds to indicate low
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.
4. AC FAIL/ CHG ALARM ꞏꞏꞏꞏ This lamp turns on and the buzzer sounds to indicate any one
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)
5. Current meter ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Indicates the charge current (+) or discharge current (-).
6. ALM MUTE switch ꞏꞏꞏꞏꞏꞏꞏꞏꞏ Silences the active alarm buzzer sound.
7. Alarm buzzer
8. Voltage meter ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Indicates the output voltage of the battery.
9. Dimmer control ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Adjusts the dimmer level of alarm lamps.
Note) Unable to turn off completely.
10. BATT breaker ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ 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.
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