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DieHard 28.71323 - User Manual

DieHard 28.71323
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0099001395-01
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.
Model / Modelo:
28.71323
12V Battery Charger
& Engine Starter
Cargador de baterías 12V
y arrancador
OPERATOR’S MANUAL /
MANUAL DEL USUARIO
CAUTION:
Read and follow all safety
rules and operating instructions
before every use of this product.
SAVE THESE INSTRUCTIONS.
ATENCIÓN:
Lea y siga todas las reglas
de seguridad e instrucciones de uso
antes de cada uso de este producto.
GUARDE ESTAS INSTRUCCIONES.

Questions and Answers

  • A
    alexanderleeAug 1, 2025
    What to do if my DieHard Battery Charger won't turn on?
    • B
      Brianna HodgeAug 1, 2025
      If your DieHard Battery Charger isn't turning on, several factors could be at play. First, check the AC outlet for a blown fuse or tripped circuit breaker. Second, ensure that the power cord and any extension cords are securely plugged in. Finally, the battery itself might be defective, so consider having it checked.
  • T
    Tammy KimAug 15, 2025
    Why does my DieHard 28.71323 Battery Charger have a short start cycle?
    • K
      Kimberly CollinsAug 15, 2025
      A short or nonexistent start cycle with your DieHard Battery Charger can stem from several causes. It could be that the cranking is drawing more current than the Engine Start Rate allows. Also, ensure you're waiting the full 3 minutes between cranks to let the battery and charger cool down. Other potential issues include poor clamp connections at the battery and frame, loose AC or extension cords, a dead power receptacle (check the fuse or circuit breaker), an overheated charger (ensure vents aren't blocked and wait for it to cool), or a severely discharged battery (use the 10A Boost setting for a few minutes).

Summary

DieHard Three-Year Full Warranty

Important Safety Instructions

Risk of Explosive Gases

Warning about explosive gases generated by batteries during charging.

Personal Safety Precautions

Personal safety measures to take when working with batteries and chargers.

Assembly and Connections

Grounding and AC Power Cord Connections

Proper grounding and AC power cord connection for safe operation.

Using an Extension Cord

Guidelines for using an extension cord with the charger.

Control Panel Overview

LED Indicators

Explanation of the meaning of various LED indicators on the control panel.

Rate Selection

How to select charging rates (6A, 10A Boost, 50A Engine Start).

Operating Instructions

Charging a Battery in the Vehicle

Step-by-step guide for charging a battery while it is installed in a vehicle.

Charging a Battery Outside of the Vehicle

Instructions for charging a battery that has been removed from the vehicle.

Automatic Charging Mode

How the charger automatically switches to maintain mode after charging.

Aborted Charge

What happens and how to reset if the charging process aborts.

Desulfation Mode

Information about the desulfation process and its potential outcomes.

Maintain Mode

Explanation of the float-mode monitoring for maintaining battery charge.

Using the Engine Start Setting

How to use the engine start feature to jump-start a vehicle.

Maintenance and Care

Troubleshooting

Battery Clamps Do Not Spark When Touched Together

Explains why battery clamps don't spark when touched together.

Three LEDs Come On for 2 Seconds, Then Turn Off

Explains the three LED indicator sequence on startup.

The Charger Will Not Turn On When Properly Connected

Troubleshooting steps when the charger fails to power on.

Short or No Start Cycle When Cranking Engine

Addresses issues with engine starting cycles and potential causes.

Before Returning for Repairs

DieHard 28.71323 Specifications

General IconGeneral
BrandDieHard
Model28.71323
CategoryBattery Charger
LanguageEnglish

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