RIDGID R839 - Manual (Page 10)

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OPERATION
Ready to charge battery pack
When battery pack reaches cooled
temperature, charger begins fast
charge mode
When battery pack reaches
warmed temperature, charger
begins fast charge mode
Charger pre-charges battery until
normal voltage is reached, then
begins fast charge mode
If red LED continues flashing for
more than 90 minutes, and green
LED remains off, this may
indicate a damaged battery
Fast charges in 30 minutes
Fast charging is complete.
Charger maintains charge mode.
LED FUNCTION OF CHARGER
See Figure 2.
Fig. 3
LED
INDICATOR
BATTERY
PACK
RED
LED
GREEN
LED
ACTION
Power
Evaluate
Evaluate
Evaluate
Evaluate
Charging
Full
Without battery pack
Hot battery pack
Cold battery pack
Deeply discharged
Thermistor shorted
or open
Fast charging
Slow charging
ON
Flashing
Flashing
Flashing
Flashing
ON
OFF
OFF
OFF
OFF
OFF
OFF
Flashing
ON
POWER
INDICATOR
EVALUATE
INDICATOR
CHARGING
INDICATOR
FULL
INDICATOR
Note: The 9.6 volt, 12 volt, and 14.4
volt battery packs will not slide all the
way down onto the charger port. Insert
9.6 volt, 12 volt and 14.4 volt battery
packs until they click into place and
are aligned with the line on the charger,
shown at left.
Allow up to 5 seconds for the “charge”
light to come on after the battery pack
is inserted.