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PLEASE SAVE THIS OWNERS MANUAL AND READ BEFORE EACH USE. This manual will explain how to use the battery charger safely and effectively. Please read and follow these instructions and precautions carefully.
SAVE THESE INSTRUCTIONS.
A SPARK NEAR THE BATTERY MAY CAUSE A BATTERY EXPLOSION. TO REDUCE THE RISK OF A SPARK NEAR THE BATTERY:
A SPARK NEAR THE BATTERY MAY CAUSE A BATTERY EXPLOSION. TO REDUCE THE RISK OF A SPARK NEAR THE BATTERY:
Length of cord (feet) | 25 | 50 | 100 | 150 |
AWG* size of cord | 18 | 18 | 18 | 16 |
*AWG-American Wire Gauge
LED INDICATORS
![]() | CLAMPS REVERSED/ BAD BATTERY (red) LED flashing: The connections are reversed. | ![]() | CHARGING (yellow/orange) LED lit: The charger is charging the battery. |
![]() | CLAMPS REVERSED/ BAD BATTERY (red) LED lit: The charger has detected a problem with the battery. See Troubleshooting for more information. | ![]() | CHARGED/MAINTAINING (green) LED pulsing: The battery is fully charged and the charger is in maintain mode. |
NOTE: See Operating Instructions for a complete description of the charger modes.
A spark near the battery may cause an explosion.
Do not start the vehicle with the charger connected to the AC outlet, or it could result in damage to the charger. NOTE: This charger is equipped with an auto-start feature. Current will not be supplied to the battery clamps until a battery is properly connected. The clamps will not spark if touched together.
CHARGING A BATTERY IN THE VEHICLE
CHARGING A BATTERY OUTSIDE OF THE VEHICLE
CHARGE RATE
The charger will automatically adjust the charging current, based on battery size, in order to charge the battery completely, efficiently and safely.
BATTERY CHARGING TIMES
Times are based on a 50% discharged battery and may change, depending on age and condition of battery.
AUTOMATIC CHARGING MODE
When the Automatic 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. When charging aborts, the charger's output is shut off, and the CLAMPS REVERSED/BAD BATTERY (red) LED will light. Do not continue attempting to charge this battery. Check the battery and replace, if necessary.
DESULFATION MODE
Desulfation could take 8 to 10 hours. If desulfation fails, charging will abort and the CLAMPS REVERSED/BAD BATTERY (red) LED will light.
COMPLETION OF CHARGE
Charge completion is indicated by the CHARGED (green) LED. When pulsing, the charger has switched to the maintain mode of operation.
MAINTAIN MODE (FLOAT MODE MONITORING)
When the CHARGED (green) LED is pulsing, 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 its maximum 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. Make sure there are no loads on the battery. If there are, remove them. If there are none, have the battery checked or replaced.
MAINTAINING A BATTERY
The SC1301 maintains both 6 and 12 volt batteries, keeping them at full charge.
NOTE: The maintain mode technology allows you to safely charge and maintain a healthy battery for extended periods of time. However, problems with the battery, electrical problems in the vehicle, improper connections or other unanticipated conditions could cause excessive current draws. As such, occasionally monitoring your battery and the charging process is required.
A minimal amount of care can keep your battery charger working properly for years.
PROBLEM | POSSIBLE CAUSE | SOLUTION |
Battery clamps do not spark when touched together | The charger is equipped with an auto-start feature. It will not supply current to the battery clamps until a battery is properly connected. The clamps will not spark if touched together. | No problem; this is a normal condition. |
Three LEDs come on for 2 seconds, then turn off. | The charger is plugged into an AC outlet. | No problem; this is normal. |
The charger will not turn on when properly connected. | AC outlet is dead. Poor electrical connection. Battery is defective. | Check for open fuse or circuit breaker supplying AC outlet. Check power cord and extension cord for loose fitting plug. Have the battery checked. |
I cannot select a 6V or 12V setting | The charger is equipped with Auto Voltage Detection, which automatically detects the voltage and charges the battery. | No problem; this is normal. |
The red ![]() | The battery voltage is still below 10V (for a 12V battery) or 5V (for a 6V battery) after 2 hours of charging. (or) In maintain mode, the output current is more than 1.5A for 12 hours. Desulfation was unsuccessful. Lack of progress is detected and battery voltage is below 14.2V (for a 12V battery) or 7.1V (for a 6V battery). The battery's initial voltage is below 12.2V (for a 12V battery) or 6.1V (for a 6V battery) and the total input is less than 1.5 Ah. The battery voltage drops to below 12.2V (for a 12V battery) or 6.1V (for a 6V battery) in Maintain Mode. | The battery may be defective. Make sure there are no loads on the battery. If there are, remove them. If there are none, have the battery checked or replaced. The battery may be defective. Have battery checked or replaced. The battery may be overheated. If so, allow the battery to cool. The battery may be too large or have a short circuit. Have battery checked or replaced. The battery capacity is too low, or the battery is too old. Have it checked or replaced. The battery won't hold a charge. May be caused by a drain on the battery or the battery could be bad. Make sure there are no loads on the battery. If there are remove them. If there are none, have the battery checked or replaced. |
Input Voltage | 120V AC @ 60Hz, 1.5A |
Output Voltage | 6V or 12V, with Auto Voltage Detection |
Output Current Rating | 2A DC @ 6V DC; 6A DC @ 12V DC |
If these solutions do not eliminate the problem, or for more information about troubleshooting, contact customer service for assistance:
services@schumacherelectric.com www.batterychargers.com or call 1-800-621-5485
Monday-Friday 7:00am to 5:00pm CST
For REPAIR OR RETURN, contact Customer Service at 1-800-621-5485. DO NOT SHIP UNIT until you receive a RETURN MERCHANDISE AUTHORIZATION (RMA) number from Customer Service at Schumacher Electric Corporation.
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Schumacher SC1301 - Automatic Battery Charger Manual
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