Schumacher Battery Charger SJ1332 Manual

The Schumacher SJ1332 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, and spark-proof technology. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Safety Instructions 3. Installation & Setup 4. Specifications 5. Controls and Indicators 6. Charging Procedure 7. Maintenance Mode 8. Error Codes & Diagnostics 9. Care & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Microprocessor control unit, Charging clamps (red/black), AC power cord, LED status indicators, Battery type selector.

Feature	Description
Microprocessor Control	Automatically adjusts charge rate and maintains battery
Multi-Stage Charging	Bulk, Absorption, and Float stages for optimal charging
Battery Type Selection	Switch for Standard, AGM, or Gel Cell batteries
Reverse Polarity Protection	Prevents damage if clamps are connected incorrectly
Spark-Proof Technology	Ensures safe connection to battery terminals
LED Status Indicators	Shows charging, maintenance, and fault conditions
Fully Automatic	Charges then switches to float/maintenance mode
Compact Design	Lightweight and portable for easy storage
AC Power Input	Standard 120V AC, 60Hz household outlet
Desulfation Mode	Helps recover lightly sulfated batteries (if equipped)

Safety Instructions

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

Wear eye protection and avoid flames/sparks near battery.
Ensure charger is unplugged before connecting/disconnecting clamps.
Connect red clamp to positive (+) terminal first, then black to negative (-) or chassis ground.
Select correct battery type (Standard/AGM/Gel) before charging.
Do not charge frozen or damaged batteries.

WARNING! Risk of explosive gases. Keep charger away from battery during connection. Do not touch clamps together.

Installation & Setup

Unpack charger and inspect for damage. Ensure work area is dry.

Place charger on stable, non-flammable surface near battery.
Plug AC cord into grounded 120V outlet (do not turn on yet).
Set battery type switch to match your battery (Standard/AGM/Gel).
Connect clamps: RED to battery positive (+), BLACK to negative (-) or clean chassis ground.
AC power will automatically begin charging sequence.

CAUTION! Ensure polarity is correct. Reverse connection may damage charger and battery.

Specifications

Model: SJ1332
Input Voltage: 120V AC, 60Hz
Output Voltage: 12V DC
Charge Rate: 1.5A (standard), 2A (maximum)
Battery Compatibility: 12V Lead-Acid (Standard, AGM, Gel Cell)
Charging Stages: 3-stage (Bulk, Absorption, Float)
Protections: Reverse polarity, short circuit, overheat
Indicators: LED for Power, Charging, Maintenance, Fault
Dimensions: Approximately 7" x 4" x 2"
Weight: 2.2 lbs
Operating Temp: 32°F to 104°F (0°C to 40°C)

Controls and Indicators

Front Panel: Battery Type Selector Switch, LED Status Indicators.

LED Indicators:

POWER (Green): AC power connected.
CHARGING (Red): Battery is in charge mode.
MAINTENANCE (Green): Battery is fully charged, maintaining voltage.
FAULT (Red Flashing): Error detected (reverse polarity, bad battery, etc.).

Battery Type Switch: Three positions: STANDARD (wet), AGM (Absorbent Glass Mat), GEL (Gel Cell).

Charging Procedure

Automatic operation once connected properly.

Ensure battery terminals are clean and charger is unplugged.
Set battery type switch to correct position.
Connect clamps: RED to positive (+), BLACK to negative (-).
Plug AC cord into outlet. POWER LED will light.
CHARGING LED will illuminate; charger begins Bulk stage.
When battery reaches 80%, charger switches to Absorption stage.
When fully charged, charger switches to Float/Maintenance mode (MAINTENANCE LED).
To disconnect: Unplug AC cord, remove BLACK clamp first, then RED.

Tip: For deeply discharged batteries, charging may take 12-24 hours.

Maintenance Mode

After full charge, charger maintains battery at optimal voltage.

MAINTENANCE LED will be solid green.
Charger monitors voltage and provides small pulses as needed.
Can be left connected indefinitely for seasonal storage.
Automatically prevents overcharging.

Note: Maintenance mode is for 12V batteries only. Do not use for 6V batteries.

Error Codes & Diagnostics

FAULT LED flashing indicates an issue.

LED Pattern	Meaning	Action
Fast Flash	Reverse Polarity	Check clamp connections; correct polarity.
Slow Flash	Bad Battery	Battery may not accept charge; check battery condition.
Alternating Flash	Overheat	Allow charger to cool; ensure ventilation.
No LEDs	No AC Power	Check outlet; ensure cord is plugged in.

Care & Storage

Unplug and disconnect before cleaning. Wipe with dry cloth.

Store in cool, dry place away from moisture.
Keep clamps clean; wipe with baking soda solution if corroded.
Coil cords neatly to prevent damage.
Do not expose to extreme temperatures or direct sunlight.

CAUTION! Do not immerse in water or use chemical cleaners.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential use. UL Listed. Copyright © Schumacher Electric Corporation. For support, visit www.schumacherelectric.com or contact 1-800-621-5485.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Charger not turning on	No AC power	Check outlet; ensure cord is fully plugged in.
FAULT LED flashing	Reverse polarity/bad battery	Verify clamp connections; test battery voltage.
Battery not charging	Deeply discharged/bad cell	Try recovery mode; check battery with voltmeter.
Charger gets hot	Ventilation blocked	Ensure charger has airflow; do not cover.
Maintenance LED not on	Battery not fully charged	Allow more time for charging cycle to complete.

Reset: Unplug AC cord, disconnect clamps, wait 30 seconds, then reconnect.

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