ON-BOARD CHARGER
PAGE 22
TROUBLESHOOTING
Problem
Cause
Solution
1. Red LED stays on for
1. One or more defective or
1. Load test the batteries and replace if
more than 18 Hrs.
damaged cells.
necessary.
2. Charger has reduced its output
2. Remove the source of the overload or
voltage below the normal level due
short. Disconnect the charger's black
to a DC overload or a DC short.
(NEGATIVE) ring terminal from the battery.
3. On-board DC systems are drawing
Reapply AC power and the green LED only
more current than the charger can
should now light.
replace.
3. Turn off all DC equipment while
4. Excessive ambient temperature has charging.
forced the charger to cutback
4. Determine the cause of the
output current in order to self
excessive ambient temperature and
protect.
correct.
2. The red and yellow LED's 1. On-board Dc systems are drawing
1. Turn off all DC equipment while
stay on for more than
in excess of 10 amps.
charging.
10 Hrs.
2. One or more defective or
2. Load test the batteries and replace
damaged cells.
if necessary.
3. Extremely low AC voltage at the
3. Apply a higher AC voltage source or
battery charger.
reduce the length of the extension cord.
3. Green #1 LED stays on
1. Open DC output fuse.
1. Replace DC output fuse with a
when the battery is known
2. Faulty or contaminated terminal
Bussmann (ABC-30 or MDA-30.)
to be low.
connections.
2. Clean and tighten or repair all
3. One or more defective or
terminal connections.
damaged cells.
3. Load test the batteries and replace if
necessary.
3. The AC Present Green#2 1. No AC power available at the
1. Connect AC power or reset the AC
LED does not turn on when charger.
breaker on the main panel.
AC power is applied.
2. Component failure.
2. Return charger to R.P.S. Corp.
4.The yellow LED is
1. Charge cycle has timed out, charging 1. See fault codes below.
blinking continuously.
process took an excessive amount
of time.
5. The red LED is blinking
1. Corrupt Microprocessor memory.
1. See fault codes below.
continuously.
2. Return charger to R.P.S. Corp.
Fault Codes:
●
Flashing red LED: Corrupt program memory in microcontroller detected, charger microprocessor has become
corrupted. Charger must be returned to R.P.S. Corp.
●
Flashing yellow LED: Timer has expired. The 2820-24 uses a timer to independently monitor each mode of the
charge cycle: bulk, absorption, and finish. If the timer expires during any of these modes of the charge cycle,
there could be a problem with the battery set. The timer may expire if there is a damaged battery cell in the battery
set, an abnormally high ambient temperature at the charger, or some other external fault, which prevents
completion of charge cycle. These problems need to be addressed by user intervention.
Charger must be AC
powered down in order to reset fault condition.
Before resetting the charger, investigate potential
problems with battery or other external faults. Once external problem is resolved, reconnect charger output
cable fuse and reconnect AC power.
5. MAINTAINING THE CHARGER
Periodically clean both battery terminals with baking soda and tighten all connections. No other maintenance on
the charger is required.
