Kohler 12RES

TP-6515 2/21 43Section 4 Troubleshooting
4.4 Battery Charger Troubleshooting
Use the battery charger’s LED indicators and the table in Figure 4-3 or Figure 4-4 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
known to be low
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 (for single-phase models)
Problem Cause Solution
Green LED is off
and there is no
output voltage.
No power to the battery charger. Check the power supply to the charger.
Check the upstream circuit breakers and fuses.
Check fuse FS (1A-T) inside the battery charger.
Abnormal low
voltage, charger is
operating.
The battery completely discharged and the
charger is operating at the current limit.
Disconnect the battery and verify that the charger
output is 13.2 VDC.
Reconnect the charger and allow time for the battery to
recharge. The battery voltage should rise gradually.
Test the battery.
The battery is
discharged, but the
charger has power
and is operating.
Blown fuse. Check the 5-amp fuse F2 (5A-T) inside the battery
charger and replace if necessary.
Check inline fuse F4 and replace if necessary.
Figure 4-4 2.5-Amp Battery Charger Troubleshooting (for three-phase models)