To Next PageTo Next PageWhy does my Schumacher Electric SE-40MAP make a loud buzz or hum?
A buzzing sound from your Schumacher Electric Battery Charger usually indicates that the transformer laminations are vibrating, which is normal. However, a humming sound may indicate a shorted diode assembly or output rectifier assembly, which would require a qualified technician to check the charger.
What to do if my Schumacher Electric Battery Charger ammeter reading stays high?
If the ammeter reading on your Schumacher Electric Battery Charger remains high, it could mean that the battery is severely discharged; in that case, continue charging the battery for two more hours. It could also indicate the wrong battery voltage. If the problem continues, have the battery checked and verify the voltage settings on the charger are correct.
How to troubleshoot a Schumacher Electric SE-40MAP Battery Charger that won't turn on?
If your Schumacher Electric Battery Charger doesn't turn on when properly connected, first check that the AC outlet is functional by testing it with another device or checking the fuse or circuit breaker. Also, inspect the power cord and any extension cords for loose connections.
Why does my Schumacher Electric SE-40MAP Battery Charger make a clicking sound?
A clicking sound from your Schumacher Electric Battery Charger can be caused by several factors. The circuit breaker might be cycling, indicating incorrect settings, so check the charger settings. The battery could be defective, or there might be shorted battery cables or clips. A severely discharged battery might also cause this, in which case, allow charging to continue. Finally, reverse connections at the battery can cause a clicking sound, so shut the charger off and correct the lead connections.
General| Brand | Schumacher Electric |
|---|---|
| Model | SE-40MAP |
| Category | Battery Charger |
| Language | English |
Details chemicals known to cause cancer and birth defects as per California Proposition 65.
Covers precautions for charger use, extension cords, and handling damaged equipment.
Highlights the danger of explosive gases from lead-acid batteries and the importance of following instructions.
Advises having assistance and keeping water/soap nearby for acid contact.
Recommends eye/body protection and removing metal jewelry near batteries.
Covers avoiding sparks, metal tools, charging only lead-acid, and avoiding frozen/overcharged batteries.
Instructions for removing the battery from a vehicle and ensuring adequate ventilation.
Steps for cleaning battery terminals and adding distilled water to cells.
Guidance on determining battery voltage and ensuring secure cable connections.
Advice on locating the charger away from the battery and avoiding enclosed spaces.
Precautions against battery acid dripping onto the charger and restricting ventilation.
Instructions on disconnecting DC output clips after turning off the charger and removing AC plug.
Guidance on attaching clips to the battery and chassis as indicated in other sections.
How to position AC/DC cables and stay clear of moving engine parts.
How to check battery polarity and determine the vehicle's grounding system.
Step-by-step guide for connecting clips on negative-grounded vehicles.
Step-by-step guide for connecting clips on positive-grounded vehicles.
Steps to safely disconnect the charger after use.
How to check polarity and attach the negative cable to the battery post.
Positioning yourself and the negative clip away from the battery for the final connection.
How to disconnect the charger and a note on marine battery charging.
Explains the need for a grounded 120-volt circuit and proper outlet installation.
Provides a table for recommended AWG wire sizes for extension cords based on amperage and length.
Displays and describes the control panels for different SE and SF series battery charger models.
Explains the function of the ammeter, how to read it, and its behavior during charging.
Explains the visual scale for charge state and its accuracy factors.
Describes antimony/lead batteries requiring water additions.
Describes calcium/lead batteries that typically do not require water additions.
Describes larger batteries for sustained energy delivery, often marked "Marine".
Intended for small batteries or trickle charging larger ones.
For automotive, marine, and deep-cycle batteries, not industrial use.
Provides additional amps for cranking an engine with a weak battery.
Used to set the charger for 6, 12, or 24-volt batteries.
Indicates the battery is fully charged and the charger is in Maintain Mode.
Indicates that AC power is supplied to the battery charger.
Signals a problem with the battery or its connection.
Steps for connecting, setting, and AC connection for charging.
Explains hydrometer readings and bubbling as signs of a fully charged battery.
Details automatic, manual, and maintain modes, and charge completion signals.
Guidance on utilizing the engine start function for jump-starting.
Advice on when a battery is sufficiently charged to start a vehicle.
How automatic chargers handle interrupted charging cycles.
A table correlating battery size/rating with charge time for different charger rates.
Explains Cold Cranking Amps (CCA) and Reserve Capacity (RC) for battery selection.
Instruction to unplug and disconnect the charger before performing maintenance.
How to clean battery corrosion and dirt from terminals, cords, and the case.
Guidance on storing the charger unplugged, upright, and in a cool, dry place.
Instructions on how not to store the charger clips.
Possible causes and solutions for the ammeter showing no reading.
Reasons and solutions when the ammeter reading remains high.
Troubleshooting steps for a charger that fails to power on.
Solutions for when the battery is connected but not charging.
Explains why measured current might be lower than selected.
Possible causes for ammeter showing lower readings during charging.
Troubleshooting the cause of an audible clicking sound from the charger.
Explains normal operating sounds like buzz or hum.
Diagnosing issues with the engine start cycle or lack thereof.
Ensuring battery acceptance, connections, and polarity are correct before seeking repair.
Explains how cold, partially charged, or sulfated batteries affect amperage draw.
Advice to consult the manual and customer service for unknown operating problems.
Details the two-year limited warranty against defects in material or workmanship.
Outlines conditions that void the warranty and limitations on damages.
Provides the customer service phone number and operating hours.
