Schumacher 85-716 - Manual (Page 13)

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2.2 CIRCUIT BREAKER
This battery charger is equipped with a self-resetting circuit breaker. This
device protects the charger from temporary overloads. In the event of
an overload, the circuit breaker will trip open and after a short cooling off
period will reset automatically. This process is known as cycling and can be
recognized by an audible clicking sound.
NOTE: Clicking sound is normal. Wait until charger automatically resets
itself.
CAUTION: Persistent clicking (more than 30 minutes) may indicate
reverse connection or shorted battery cells. (See TROUBLESHOOTING.)
13. MAINTENANCE INSTRUCTIONS
The charger is designed and built with high quality materials requiring only
a minimum amount of care.
3. Clamps should be cleaned each time the charger is used to prevent
corrosion from battery fluid.
3.2 Cords should be coiled when the charger is not being used to prevent
damage.
13.3 Other servicing should be performed by qualified service personnel.
14. TROUBLESHOOTING
4. Red LED doesn't light:
a. Charger is not plugged in. Plug in.
b. AC outlet is dead. Plug in a lamp or other appliance to check for
voltage.
4.2 Charger will not turn ON when properly connected to power:
a. Battery recently used in vehicle and is fully charged. Battery doesn't
need charging.
4.3 Charger will not turn OFF:
a. Battery has problem and will not take full charge. Have battery
checked.
b. Battery is connected to application that draws a small current (such
as a vehicle's dome light). Requires more time to charge; continue
charging.