Schumacher Battery Charger SE 1052 Manual

The Schumacher SE 1052 is a fully automatic battery charger and maintainer designed for 12V lead-acid batteries, including standard, AGM, and gel cell types. It features a microprocessor-controlled charging process, automatic voltage detection, float mode monitoring, and reverse hook-up protection. Below are key sections for safety, features, operation, specifications, and troubleshooting.

Features at a Glance

Key components: Charger unit, Battery clamps (red/black), AC power cord, LED status indicators.

Safety Instructions

Read all instructions before use. Failure to follow may result in injury or damage.

1. Use only with 12V lead-acid batteries. Do not charge non-rechargeable batteries.
2. Work in a well-ventilated area. Batteries generate explosive gases.
3. Wear eye protection and avoid leaning over battery during connection.
4. Ensure charger is unplugged from AC outlet before connecting to battery.
5. Connect red clamp to positive (+) terminal first, then black to negative (-) or ground.
6. Do not expose charger to rain, snow, or liquids.
7. Keep charger away from heat sources and flammable materials.

WARNING! Risk of explosive gases. Never smoke or create sparks near battery. Ensure proper ventilation.

Installation & Connection

Proper connection ensures safe and effective charging.

1. Prepare battery: Clean terminals if corroded. Ensure battery is in a stable, level position.
2. AC connection: Plug charger into a standard 120V AC, 60Hz outlet. LED may illuminate briefly.
3. DC connection: With charger unplugged, connect red clamp to battery positive (+) terminal.
4. Connect black clamp to battery negative (-) terminal or a solid, unpainted metal ground on vehicle frame.
5. Plug charger into AC outlet. Charger will automatically begin diagnostic and charging sequence.

CAUTION! Never connect clamps directly to each other. Ensure clamps have firm metal-to-metal contact.

Specifications

• Model: SE 1052
• Input Voltage: 120V AC, 60Hz
• Output Voltage: 12V DC (automatic 6V detection for compatible models)
• Charge Rate: 1.5 Amp (fully automatic)
• Battery Compatibility: 12V Lead-Acid (Standard, AGM, Gel Cell)
• Charging Modes: Bulk, Absorption, Float/Maintenance
• Protections: Reverse Polarity, Short Circuit, Overheat, Overcharge
• Indicators: Multi-color LED (Red/Green/Flashing)
• Cord Length: AC: 3 ft, DC Clamps: 2.5 ft
• Operating Temperature: 32°F to 104°F (0°C to 40°C)
• Storage Temperature: -4°F to 122°F (-20°C to 50°C)
• Dimensions: 6.5" L x 3.5" W x 2.5" H
• Weight: 1.8 lbs

Controls and Indicators

The charger features a single multi-color LED indicator for status feedback.

LED Status Guide:

• Solid Red: Charging in progress (Bulk/Absorption phase).
• Flashing Red: Battery voltage is very low. Charger is performing a slow, diagnostic charge. If flashing continues for more than 4 hours, battery may be damaged.
• Solid Green: Charge complete. Battery is fully charged and charger is in Float/Maintenance mode.
• Flashing Green: Maintenance mode active. Charger is monitoring and maintaining optimal voltage.
• Alternating Red/Green Flash: Fault condition detected (reverse polarity, bad battery, overheat).
• No Light: No AC power, or charger is in standby (clamps connected but AC unplugged).

There are no physical buttons or switches. Operation is fully automatic upon connection.

Charging Process

The microprocessor manages a 3-stage charging cycle for optimal battery health.

1. Stage 1 - Diagnostic & Bulk Charge: Charger analyzes battery condition. If voltage is extremely low, it begins a slow, safe charge (Flashing Red). For normal batteries, it delivers maximum current (Solid Red) until battery reaches approximately 80% capacity.
2. Stage 2 - Absorption Charge: Voltage is held constant while current gradually tapers off (Solid Red continues). This completes the charge to 100%.
3. Stage 3 - Float/Maintenance: Charger switches to a lower voltage to maintain full charge without overcharging. LED turns Solid Green, then may Flash Green periodically.

Typical Charge Times: A completely discharged 50Ah battery may take approximately 30-35 hours to reach full charge at 1.5A. Times vary based on battery size, condition, and temperature.

Maintenance Mode

After full charge, the SE 1052 automatically enters maintenance mode (Float Mode).

• The charger monitors battery voltage and provides a small trickle charge only when needed to counteract natural discharge.
• This allows for safe, long-term connection (weeks or months) to maintain a battery, such as for seasonal vehicles, lawn equipment, or marine applications.
• LED will be Solid Green or periodically Flash Green during maintenance.

Note: Although designed for long-term maintenance, periodically check the battery and charger condition.

Error Codes & Diagnostics

The LED flashing pattern indicates specific conditions.

Care & Storage

Proper care extends the life of your charger.

1. Cleaning: Unplug from AC and battery. Wipe exterior with a dry, soft cloth. Do not use liquids or solvents.
2. Storage: Coil cords neatly. Store in a cool, dry location away from direct sunlight and moisture.
3. Clamp Care: Keep clamps clean. Light corrosion can be brushed off with a wire brush. Ensure jaws close firmly.

CAUTION! Never immerse charger in water or other liquids. Do not store with clamps connected to a battery.

Regulatory Information

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. This Class B digital apparatus complies with Canadian ICES-003. Copyright © Schumacher Electric Corporation. Schumacher® is a registered trademark. For support, visit www.schumacherelectric.com or contact customer service at 1-800-621-5485.

Troubleshooting

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

Service: For repairs, do not open charger. Contact Schumacher customer service at 1-800-621-5485 or visit www.schumacherelectric.com.