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charger will flash twice and then the charger will step
through the 4 LEDs and stop at the one flashing green
LED that signifies the battery state of charge and that
the battery is charging.
4. Certain built-in safety protections may lock the charger
off. If no charger light illuminates, remove the battery
and unplug the charger for 10 minutes. Plug the
charger back in and insert a known good battery. If no
light comes on the charger is faulty and must be
replaced.
5. The charger will not charge if the battery pack is too hot
or too cold. The charger will show a flashing yellow
LED and wait until the battery temperature is between
32°F (0°C) and 113°F (45°C) to begin fast charging.
6. Standard fast charging time is 30 minutes. Charger
may take longer than 30 minutes. The charge cycle
may be longer if the battery has been left in a low state
of charge for an extended period of time. When the
charge is complete, all 4 green LED's stay illuminated.
7. A flashing red LED indicates the battery is faulty and
the charger will not charge. Remove the battery from
the charger and replace the battery.
Battery Pack
Battery Pack Protection
To maximize performance and battery life, the Lithium-
Ion battery is protected by safety circuits in the tool and
the charger. They monitor battery voltage, discharge/
charge amperage and temperature.
Cold Weather Operation
The Lithium-Ion battery can be used in temperatures
down to -4°F(-20°C). When the battery pack is very cold,
run the tool at no load to warm the battery and then use
the tool normally.
Hot Weather Operation
If the Lithium-Ion battery temperature reaches 113°F
(45°C), the protection circuit will turn off the battery.
Once the battery has cooled down, the charger will
resume normal operation.
Storage
Do not expose your battery pack to water or rain; this
could damage the battery pack.
Fully charge the battery before placing it in storage. For
optimum life, store the all Lithium-Ion batteries at room
temperature away from moisture. Permanent capacity
loss can result if batteries are stored for a long period at
high temperature.
ZCTC772ACE Rev. C
Maintenance
Service
Service of a charger requires extreme care and
knowledge. Service should be performed only by a
qualified service technician.
• Always check charger for damaged parts before use.
• Replace or repair damaged parts before use. Check
broken parts, mounting, and any other conditions that
may alter operation.
• Have damaged parts properly repaired or replace by an
Authorized Service Center.
• Maintain chargers. Keep chargers dry, clean, and free of
oil and grease for better and safer performance.
• For location of the nearest Snap-on repair center, call
Snap-on customer service at 1-877-762-7664.
• When charging or discharging a lithium-ion battery over
a short period of time, the internal temperature of the
battery pack increases substantially. This is normal.
• Under ideal working conditions the useful life of a lithium-
ion battery pack is around 1000 charge/discharge cycles.
Improper care and maintenance shortens battery life and
the amount of time the battery holds a charge.
• Use only with Snap-on charging equipment that
specifies a CTB series battery pack.
• Avoid short circuiting the battery pack. Permanent
damage to the pack can occur from high current
discharge.
• Unplug charger from outlet before starting the
disassembly procedure.
• Remove the battery pack from the tool before starting
the disassembly procedure. Short-circuiting the
battery pack can cause fire or personal injury.
• Use safety equipment. Always wear eye protection.
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