Napa 90-620 Owner's Manual page 5

automatically use the Boost rate during first 10 minutes, if needed, and then switch to the Charge
rate to charge the battery efficiently.
10. When charging is complete, indicated by Charged/Maintaining (green) LED lit, or if you are done,
press Rate Selection button, disconnect the charger from the AC power, disconnect the clamp
attached to vehicle's chassis, and finally remove the clamp from battery terminal.
CHARGING A BATTERY OUTSIDE OF THE VEHICLE
1. Place battery in a well-ventilated area.
2. Clean the battery terminals.
3. Connect the battery, following the precautions listed in sections 6 and 7.
4. Connect the charger to the electrical outlet.
5. Select the battery type.
6. Press the Rate Selection button until the desired option is selected (indicated by the corresponding
LED turning on). Charging will then begin in a few seconds. If not pressed within 30 seconds,
charging will begin automatically with the Boost rate and its LED lit. With the Charge rate selected,
charging of the battery will automatically complete. Even with Charge rate selected, the charger will
automatically use the Boost rate during first 10 minutes, if needed, and then switch to the Charge
rate to charge the battery efficiently.
7. When charging is complete, indicated by Charged/Maintaining (green) LED lit, or if you are done,
press Rate Selection button, disconnect the charger from the AC power, disconnect the negative
clamp, and finally the positive clamp.
8. A marine (boat) battery must be removed and charged on shore.
BATTERY CHARGING TIMES
Charge time will depend on battery size, as depicted in the chart below.
BATTERY
SIZE
APPLICATION
POWERSPORTS 6Ah
32Ah
AUTOMOTIVE 300 CCA
1000 CCA
MARINE 50Ah
105Ah
Times are based on a 50% discharged battery and may change, depending on age and condition of battery.
AUTOMATIC CHARGING MODE
When the 6<>2A Charge is performed, the charger switches to the maintain mode automatically after the
battery is charged.
ABORTED CHARGE
If charging cannot be completed normally, charging will abort. The digital display will show FNN,
where nn is an error code (see Troubleshooting for a description of the error codes). Do not continue
attempting to charge this battery. Have it checked or replaced.
DESULFATION MODE
Desulfation could take 8 to 10 hours. If desulfation fails, the display will show F02, charging will abort
and the Clamps Reversed/Bad Battery (red) LED will light solid.
COMPLETION OF CHARGE
Charge completion is indicated by the Charged/Maintaining (green) LED. When lit, the charger has
switched to the maintain mode of operation.
MAINTAIN MODE (FLOAT MODE MONITORING)
When the Charged/Maintaining (green) LED is lit, the charger has started maintain mode. In this mode,
the charger keeps the battery fully charged by delivering a small current when necessary. If the charger
has to provide an excessive maintain current for a continuous 12 hour period, it will go into abort mode
(see Aborted Charge section). This is usually caused by a drain on the battery or the battery could be bad.
CHARGING TIME (Hours)
2A 6A 8A 10A
6 2 1.75 1.5
15 5 4.5 4
12 4 3.5 3
30 10 8.5 7
15 5 4.25 3.5
33 11 9.5 8
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