TP-6734 5/10 43Section 4 Troubleshooting
4.4 Battery Charger
Troubleshooting
Use the battery charger’s LED indicators and the table in F igure 4-3 to troubleshoot battery charger operation
problems.
Problem Cause Solution
Red LED stays on
for more than
24 hours
One or more inoperative or damaged cells. Load test the battery and replace, if necessary.
Battery charger has reduced its output
voltage below the normal level due to a DC
overload or a DC short.
Remove the source of the overload or short.
Disconnect the battery charger’s black (NEGATIVE)
ring terminal from the battery. Reapply AC power and
the green LED only should now light.
Onboard DC systems are drawing more
current than the battery charger can replace.
Turn off all DC equipment while charging.
Red and green
LEDs stay on for
more than 24 hours
Onboard DC systems are drawing between
1.5 and 5 amps.
Turn off all DC equipment while charging.
One or more inoperative or damaged cells. Load test the battery and replace, if necessary.
Extremely low AC voltage at the battery
charger.
Apply a higher AC voltage source or reduce the length
of the extension cord.
Green LED stays on
when the battery is
knowntobelow
Open DC output fuse. Replace AGS-10 fuse.
Faulty or contaminated terminal connections. Clean and tighten or repair all terminal connections.
One or more inoperative or damaged cells. Load test the battery and replace, if necessary.
Neither of the LEDs
turn on when the
AC power is applied
No AC power available at the battery
charger.
Connect AC power or reset the AC breaker on the
main panel.
Component failure. Replace battery charger.
Figure 4-3 6-Amp Battery Charger Troubleshooting
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