Schumacher SC1309 Battery Charger Manual

The Schumacher SC1309 is a fully automatic battery charger and maintainer designed for 12V lead-acid batteries, including standard, AGM, and gel cell types. It features microprocessor-controlled charging, automatic voltage detection, multi-stage charging (bulk, absorption, float), reverse hook-up protection, spark-proof technology, and a compact, portable design. Below are key sections for safety, features, operation, specifications, and troubleshooting.

Features at a Glance

Key components: Microprocessor control unit, Charging cables with clamps, AC power cord, LED status indicators, Protection circuitry.

Safety Instructions

Read all instructions before use. Charger contains electrical parts that can cause serious injury or death.

1. Use only with 12V lead-acid batteries. Do not use with non-rechargeable batteries.
2. Ensure area is well-ventilated. Batteries generate explosive gases.
3. Wear eye protection and avoid leaning over battery during connection.
4. Do not expose charger to rain, snow, or liquids.
5. Disconnect AC power before making or breaking battery connections.

WARNING! Risk of explosive gases. Keep sparks, flames, and cigarettes away from battery. Connect and disconnect clamps carefully.

Installation & Setup

Unpack and inspect contents. Place charger on stable, dry surface away from battery.

1. AC Connection: Plug power cord into standard 120V AC, 60Hz outlet.
2. Battery Connection: Ensure battery is in vehicle with ignition OFF. Connect RED clamp to POSITIVE (+) terminal first, then BLACK clamp to NEGATIVE (-) terminal or vehicle chassis ground.
3. Power On: Charger will automatically begin diagnosis and charging sequence.
4. Charging Complete: LED will indicate full charge. Disconnect BLACK clamp first, then RED clamp.

CAUTION! Never connect charger cables directly to vehicle accessories or circuits. Connect only to battery terminals.

Specifications

• Model: SC1309
• Input Voltage: 120V AC, 60Hz
• Output Voltage: 12V DC
• Charge Rate: 1.5A (standard), 750mA (maintenance)
• Battery Compatibility: 12V Lead-Acid (Standard, AGM, Gel Cell)
• Battery Capacity: Up to 30Ah (charge), 120Ah (maintain)
• Charging Stages: 3-stage (Bulk, Absorption, Float)
• Protections: Reverse polarity, short circuit, overcharge, overheat
• Operating Temperature: 32°F to 104°F (0°C to 40°C)
• Dimensions: 6.5" x 3.5" x 2.25"
• Weight: 1.5 lbs

Controls and Indicators

LED Status Display: Located on top of charger unit.

LED Indicators:

• POWER (Green): Solid – AC power connected. Blinking – Error detected.
• CHARGING (Red): Solid – Bulk/absorption charging in progress.
• FULL (Green): Solid – Battery fully charged, float/maintenance mode active.
• FAULT (Red Blinking): Error condition (reverse connection, bad battery, overheat).

Automatic Features: No manual controls. Charger automatically detects battery condition and selects appropriate charge mode.

Charging Procedure

For optimal performance, follow these steps:

1. Prepare battery: Ensure battery terminals are clean and free of corrosion.
2. Connect AC: Plug charger into wall outlet. POWER LED should illuminate solid green.
3. Connect battery: Connect RED clamp to positive (+) terminal first, then BLACK clamp to negative (-) terminal or chassis ground.
4. Charging begins: CHARGING LED will light solid red. Charger will diagnose battery and begin multi-stage charging.
5. Monitoring: Charger automatically progresses through stages. No user intervention required.
6. Completion: When FULL LED lights solid green, charging is complete and maintainer mode is active.
7. Disconnect: Unplug AC power first. Remove BLACK clamp, then RED clamp from battery.

Tip: For deeply discharged batteries, charging may take 12-24 hours. Charger will automatically adjust charge time based on battery condition.

Maintenance Mode

After full charge is reached, charger automatically switches to Float/Maintenance mode.

• Function: Maintains battery at optimal voltage without overcharging.
• Indicator: FULL LED remains solid green.
• Duration: Can remain connected indefinitely for seasonal storage.
• Current: Reduces to 750mA trickle charge to prevent sulfation.

Note: Ideal for vehicles, boats, motorcycles, and lawn equipment in storage.

Error Codes & Protection

Charger includes multiple protection features with visual indicators.

Care & Storage

Unplug from AC and battery before cleaning. Wipe with dry cloth only; do not use liquids or solvents.

Storage: Store in cool, dry place. Keep cables neatly coiled to prevent damage.

CAUTION! Do not disassemble charger. No user-serviceable parts inside. Refer servicing to qualified personnel.

Regulatory Information

FCC Part 15: Class B digital device. Complies with Canadian ICES-003. UL listed. Copyright © Schumacher Electric Corporation. For support, visit www.schumacherelectric.com or contact 1-800-621-5485.

Troubleshooting

Reset: Disconnect from AC and battery for 2 minutes to reset microprocessor.

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