Download MUS 3300 - CTEK Battery Chargers

CTEK MUS-3300 FAQs
Is this the right charger for you?
 3.3 amp.
 Charging and maintenance range: 1.2 – 120 Amp Hour.
 Ideal for long term battery maintenance.
 For use in temperature range -4°F to 120°F.
 Desulfates batteries.
 Includes traditional alligator clamps and a set of comfort eyelet connectors.
 Compatible with all lead acid, AGM, and GEL batteries. (CTEK Lithium US is required for
lithium batteries.)
 Includes low amp (.8 amp) settings for small engine batteries such as motorcycles and
lawnmowers.
Troubleshooting:
1. No LED is lit when the charger is connected only to the battery.
Possible Cause: The charger requires voltage from the battery for the Standby LED to be lit.
Solution: Connect the charger to a fresh battery. If the battery charger is still not lit, it may be
faulty.
2. No LED is lit when the charger is connected only to the power outlet.
Possible Cause: One of the LED’s at the lower row should light up when the charger is
connected to the power outlet.
Solution: Make sure that there is power from the power outlet. If the charger is still not lit the
charger may be faulty.
3. No LED is lit when the charger is connected to both the power outlet and the battery.
Possible Cause: The battery voltage could be under 2 vt.
Solution: Test against another battery that is fresh. If nothing happens, even though the
voltage is above 2 volts, the charger could be faulty.
4. The charger does not switch from
into maintenance charging
.
Possible Cause 1: Larger loads are connected to the battery at the same time.
Solution: Disconnect the loads from the battery and try to charge again.
Possible Cause 2: Defective battery
Solution 1: If possible, measure the voltage on the battery when the charging should be
completed. If the voltage is under 14.1 vt. the battery is most likely faulty.
Solution 2: Test the charger on a good battery. If it is the same result, the charger may be
faulty.
5.
and
is lit (flashing rapidly) simultaneously.
Possible Cause 1: Bad connection
Solution: Move the clamps and make sure there is no loose connection in the quick connector,
Comfort Connect.
Possible Cause 2: The charger is working in the desulphation phase.
Solution: Charge battery for 24 hours (with some supervision). If the charger does not start
charging (one of the LED’s are lit) within 24 hours, the battery is in a very poor condition.
6.
switches to
after the charge has been stopped.
Possible Cause: When the charger restarts the battery voltage is monitored. If the voltage is
above 12.9 vt. the charging will not commence. When the battery is at 12.9 - 14.4 vt. it is seen
as fully charged.
Solution: The charging will automatically start again when the battery voltage drops below
12.9 vt.
7. The charger goes into Standby mode after the power is cut and the charging does not start
again.
Possible Cause: The charger will turn into Standby if the voltage in the battery is below 6V
when the power is back on.
Solution: Start the charging again by pressing on the mode button.
8. The error LED
is lit.
Possible Cause 1: Reverse polarity.
Solution: Be certain that the (+) cable/clamp (positive) is connected to the (+) terminal and
the (–) cable/clamp (negative) is connected to the (–) terminal or adequate ground.
Possible Cause 2: Current draw is connected to the battery which requires more power than
the charger can provide.
Solution: Turn off or disconnect the draws when charging.
Possible Cause 3: The charger is not connected to a 12 vt. battery or a battery with +2 vt.
Solution: Test charger on a good battery.
9. The Mode button will not advance to next mode.
Possible Cause 1: The battery has less than 2 vt.
Solution: Charge the battery for a short time with a traditional linear charger or jumper. This
will create enough voltage for charging to being with the MUS 4.3. Be certain your charging
method will not damage vehicle electronics. (No charger will recover a battery that is simply
faulty from age or defect.)
Possible Cause 2: Mode button has failed.
Solution: The charger has failed and will need to be replaced.