F3 Series Charger Manual
9
FIGURE 3.4
LED Indicators on Charger Front Panel
AC ON
Indicates that AC power is being supplied to the charger.
BOOST
The charger is operating in the BOOST mode.
FLOAT
The charger is operating in the FLOAT mode.
AC FAIL
Indicates that AC power is not available to the charger. Input AC is failed, or AC breaker is tripped.
CHGR FAIL
Indicates that the charger is failing to produce the output current required by the battery and load. When
the battery and load demand no current the failure alarm will not activate.
In the event that the CHARGE FAIL and AC ON lights are illuminated simultaneously, then the charger
has failed. The probable causes of an alarm, in descending order of likelihood are:
a) A failure of AC power
b) A tripped AC breaker
c) The charger has malfunctioned
LOW DC
Indicates that DC voltage has dropped to approximately 8.5% below nominal battery voltage (e.g. 22
volts for a 24 volt system). Probable causes:
a) The AC power has failed, and the battery has become discharged
b) The charger has malfunctioned and the battery has become discharged
c) The battery is defective
There is a time delay in the low voltage alarm which prevents the alarm from activating until
approximately 30 seconds after the low voltage condition starts.
HIGH DC
Indicates that the charger’s output has exceeded a pre-set threshold level (approximately 20% above
nominal battery voltage - e.g. 29 volts for a 24 volt system). If this alarm stays activated for any period of
time, the charger should be shut down and serviced. The charger may have malfunctioned, or the alarm
card may be misadjusted. The alarm actives immediately upon high voltage condition, but stays activated
for approximately 30 seconds after the condition disappears.
