Schumacher Battery Charger SC11 Manual

The Schumacher SC11 is a fully automatic battery charger designed for 6V and 12V lead-acid batteries, including standard, AGM, and gel cell types. It features automatic voltage detection, multi-stage charging (bulk, absorption, float), reverse hook-up protection, and a digital display showing voltage, charge status, and fault codes. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Precautions 3. First-Time Setup 4. Specifications 5. Controls and Indicators 6. Connecting to Battery 7. Charging Process 8. Maintenance Mode 9. Care & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital display, Charging clamps (red/black), AC power cord, Mode selection button, Battery type selector.

Feature	Description
Automatic voltage detection	Detects 6V or 12V battery automatically
Multi-stage charging	Bulk, absorption, and float stages for optimal charging
Battery type support	Standard, AGM, and gel cell batteries
Reverse hook-up protection	Prevents damage if clamps are connected incorrectly
Digital display	Shows voltage, charge status, and error codes
Maintenance mode	Keeps battery at full charge during storage
Fully automatic operation	Charger adjusts charging rate automatically
Overcharge protection	Prevents battery damage from overcharging
Compact design	Lightweight and portable for easy use
AC input	Standard 120V AC, 60Hz power input

Safety Precautions

Read all instructions before use. Use in well-ventilated area.

Wear safety glasses and gloves when handling batteries.
Ensure charger is unplugged before connecting clamps.
Connect red clamp to positive (+) terminal, black to negative (-).
Keep charger away from water, heat sources, and flammable materials.
Do not charge frozen or damaged batteries.

WARNING! Risk of explosion or acid burn. Follow all safety instructions. Do not disconnect clamps while charger is powered on.

First-Time Setup

Unpack charger and inspect for damage. Read manual thoroughly.

Select battery type: Use selector switch for STANDARD, AGM, or GEL.
Connect clamps: Ensure charger is unplugged. Attach red to positive, black to negative.
Plug into AC outlet: Use grounded 120V outlet.
Monitor display: Charger will auto-detect voltage and begin charging.

CAUTION! Ensure proper ventilation. Do not cover charger during operation.

Specifications

Input Voltage: 120V AC, 60Hz.
Output Voltage: 6V/12V DC automatic detection.
Charging Current: Up to 10A for 12V, 5A for 6V.
Battery Types: Lead-acid, AGM, gel cell.
Display: Digital LCD showing voltage, charge status, errors.
Protections: Reverse polarity, overcharge, short circuit.
Dimensions: Compact and portable design.
Operating Temp: 32°F to 104°F (0°C to 40°C).
Warranty: 1-year limited warranty.

Controls and Indicators

Front Panel: Digital display, MODE button, Battery type selector.

Display Indicators: Voltage readout, Charging status (bulk/absorption/float), Error codes (E1-E4).

Modes: Normal charge, Maintenance mode. Battery type: STANDARD (wet cell), AGM (absorbed glass mat), GEL (gel cell). Status lights: Power ON, Charging, Complete, Fault.

Connecting to Battery

Always connect clamps with charger unplugged from AC outlet.

Turn off all accessories and ignition on vehicle.
Connect red clamp to positive (+) battery terminal.
Connect black clamp to negative (-) terminal or vehicle chassis ground.
Plug charger into AC outlet. Display will light up.
Charger auto-detects voltage and begins charging.

Tip: For best results, charge battery at room temperature. Clean terminals before connecting.

Charging Process

Charger operates automatically through three stages.

Bulk Stage: Delivers maximum current to raise battery voltage.
Absorption Stage: Voltage held constant, current tapers as battery nears full charge.
Float Stage: Maintains battery at full charge with minimal current.
Completion: Display shows "FULL" or "100%". Unplug AC cord, then remove clamps.

WARNING! Do not leave charger connected indefinitely. Monitor charging progress.

Maintenance Mode

For long-term battery storage. Keeps battery at optimal charge.

Connect charger as normal.
Press MODE button until "MAINT" appears on display.
Charger will cycle on/off to maintain battery without overcharging.
Can be left connected for weeks safely.

Note: Only use with 12V batteries. Not recommended for 6V batteries.

Care & Storage

Unplug and clean after each use. Store in dry, cool location.

Wipe exterior with dry cloth. Do not use liquids.
Inspect clamps and cords for damage before use.
Store in original box or protective case.
Keep away from children and pets.

CAUTION! Do not expose to rain or moisture. Do not store near heat sources.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. UL listed. Copyright © Schumacher Electric Corporation. All trademarks property of their respective owners. For support, visit www.schumacherelectric.com or contact 1-800-621-5485.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Display blank	No power	Check AC outlet; ensure plug is fully inserted.
Error code E1	Reverse polarity	Disconnect and reconnect clamps correctly (red to +, black to -).
Error code E2	Battery voltage too low	Battery may be damaged or sulfated. Try recovery mode or replace battery.
Error code E3	Over temperature	Allow charger to cool; ensure ventilation.
Not charging	Poor connection	Clean battery terminals; ensure clamps have good contact.
Charger shuts off	Overload protection	Check for short circuit; disconnect and restart.

Reset: Unplug charger for 5 minutes to reset internal circuitry.

Service: 1-800-621-5485; www.schumacherelectric.com