Operating instructions

FC Operation & Maintenance Guide (20 & 25 Amp)

from the boost (or high rate) charge to float charge. Do not automatically assume that the

charger has failed if the ammeter reads 0 amps!

4.3 Alarm Operation (pertains only to FCA models)

The alarm LEDs have the following meanings:

Power on: AC power is available to the charger

Charge fail: The charger senses voltage rather than current to detect "failure"; once battery

voltage drops approximately 1 volt below nominal the alarm activates. This may

occur when:

a) The battery is fully discharged

b) The AC power has failed, and the battery has become discharged

c) There is an excessive load on the charger (not a charger failure)

d) The charger has failed

There is a time delay of approximately one minute between the start of the alarm

condition and the actual alarm signal. This prevents spurious indications during

short-term deep battery discharge (as would happen during engine cranking). The

delay period can be adjusted. See section.5.3

AC fail There is no AC power to the charger. This indicates either:

a) The AC power has failed

b) The input fuse is blown

High battery: Indicates that the output voltage is above a preset, adjustable point. The control

circuit may have malfunctioned, or it could be misadjusted. In some cases, long

leads of small gauge wire to the batteries cause a high battery alarm. The charger's

True Voltage Sensing circuit automatically compensates for voltage drop in the

charging leads. If charging leads are too small, the charger will operate at a high

voltage to overcome high resistance in the leads. The alarm indication is made as

soon as the alarm condition begins and lasts for approximately one minute after the

alarm condition ends.

Low battery: Indication is made when the battery voltage is below a preset, adjustable point.

This may occur when:

a) The AC power has failed and the battery has become discharged

b) The charger has malfunctioned

c) The battery is defective

There is a delay of approximately one minute between the start of the alarm

condition and the alarm signal. This prevents false indications due to engine

cranking or oth

er temporary deep battery discharge. The delay period can

be adjusted. Consult the factory.