OWNER’S MANUAL
Model PSC-12500A
For 6 and 12-Volt Batteries
ELECTRONIC
BATTERY CHARGER
a m p
a m p
S
L
O
W
F T
A
S
2
C H A R G E
15 40
C H A R G E
a m p
E N G I N E
S T A R T
125
Fully Automatic
Microprocessor Controlled
Battery Charger with
Engine Starter plus
Battery Tester and
Alternator Tester
CAUTION:
Read all Safety Rules and Operating Instructions,
and follow them with each use of this product.
Schumacher Electric Corporation
Professional Products Division
Mount Prospect, IL 60056 U.S.A.
Send Warranty Product Repairs to:
Customer Service Returns
P.O. Box 280, 1025 E. Thompson, Hoopeston, IL 60942-0280
Questions? Call Customer Service: 1-800-621-5485 (Hours: 7 a.m. – 4:30 p.m. CST)
00-99-000742/1106
IMPORTANT SAFETY INSTRUCTIONS
WARNING – RISK OF EXPLOSIVE GASES
WORKING IN VICINITY OF A LEAD-ACID BATTERY IS DANGEROUS. BAT-
TERIES GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY
OPERATION. FOR THIS REASON, IT IS OF UTMOST IMPORTANCE THAT
EACH TIME BEFORE USING YOUR CHARGER, YOU READ THIS MANUAL
AND FOLLOW THE INSTRUCTIONS EXACTLY.
To reduce risk of battery explosion, follow these instructions and those published by
battery manufacturer and manufacturer of any equipment you intend to use in vicinity of
battery. Review cautionary markings on these products and on engine.
SAVE THESE INSTRUCTIONS
This manual contains important safety and operating instructions for
• WARNING: Handling the cord on this
product or cords associated with ac-
cessories sold with this product, may
expose you to lead, a chemical known
totheStateofCaliforniatocausecancer
and birth defects or other reproductive
harm. Wash hands after handling.
• WARNING: Battery chargers get hot
during operation and must have proper
ventilation. Air needs to flow around
entire charger. Do not set charger on
flammable materials like carpeting, up-
holstery,paper,cardboard,etc.Charger
may damage leather and melt plastic
and rubber.
• Readallinstructionsandcautionsprinted
on the battery charger, battery, and ve-
hicle or equipment using battery.
HELP US HELP YOU ——
Remember:
• Use charger only on lead acid type
rechargeable batteries, such as those
used in cars, trucks, tractors, airplanes,
vans, RVs, trolling motors, etc. This
charger is not intended to supply power
to a low voltage electrical system other
than in a starter-motor application.
Place charger as far away from the bat-
tery being charged as the charger cables
will permit.
Do not expose charger to rain or snow.
Useofanattachmentnotrecommendedor
sold by the battery charger manufacturer
may result in a risk of fire, electric shock,
or injury to persons.
• Never use charger for charging dry cell
batteries that are commonly used with
home appliances like radios, stereos,
remote controls, etc. These batteries
may burst and cause personal injury.
Never charge a frozen battery. If battery
fluid (electrolyte) becomes frozen, bring
battery into a warm area to thaw before
you begin charging.
• Do not disassemble charger. Take it to a
qualified service professional if service
orrepairisrequired. Incorrectassembly
may result in fire or electrical shock.
Never allow battery acid to drip on char-
ger when reading specific gravity or filling
battery.
• Toreduceriskofelectricalshock, unplug
thechargerfromtheoutletbeforeattempt-
ing any maintenance or cleaning.
Never set a battery on top of the charger.
Neverplacechargerdirectlyabovebattery
being charged. The gases from the battery
will corrode and damage the charger.
• Always charge battery in a well-venti-
lated area.
2
Never touch the battery clamps together
when the charger is on. You could cause
a spark.
Never pull out the plug by the cord when
unplugging the charger. Pulling on the
cord may cause damage to the cord or
the plug.
Never operate charger if it has received
a hard blow, been dropped, or otherwise
damaged.Takeittoaqualifiedprofessional
for inspection and repair.
Do not operate the charger if it has a
damaged power cord or plug. Have the
cord replaced.
Besuretopositionthechargerpowercord
topreventitfrombeingsteppedon, tripped
over, or damaged.
PERSONAL SAFETY PRECAUTIONS
• Wear complete eye and clothing
protectionwhenworkingwithlead-acid
batteries.
• Remove all personal metal items
fromyourbodysuchasrings, bracelets,
necklaces and watches, while working
with a lead-acid battery. A battery can
produce a short circuit current high
enough to weld a ring (or the like) to
metal, causing a severe burn.
• Make sure that someone is within
range of your voice to come to your aid
ifneededwhileyouworkwithorarenear
a lead-acid battery.
• Take care not to drop any metal tool
or metal object onto the battery. This
may spark or short circuit the battery or
anotherelectricaldevicethatmaycause
an explosion.
• Have plenty of fresh water and soap
nearby for use in case battery acid con-
tacts your eyes, skin, or clothing. If this
happens, wash immediately with soap
and water. Then get medical attention.
• Always operate the battery charger in
an open, well-ventilated area.
• Avoid touching your eyes while
working with a battery. Acid particles
(corrosion) may get into your eyes. If
this occurs, flush eyes immediately
with running cold water for at least 10
minutes. Then immediately get medical
attention.
• Never smoke or allow a spark or flame
in the vicinity of the battery or engine.
Batteries generate explosive gases.
• Neutralize any acid spills thoroughly
with baking soda before attempting to
clean up.
BEFORE USING YOUR BATTERY CHARGER
It is important to understand your charger's requirements. This section will tell you about
your charger's electrical requirements and how to prepare a battery for charging.
PLUGGING IT IN
ASSEMBLING YOUR CHARGER
Included with your battery charger are
two cord wrap cleats for storage of the
clamp cables.
Your charger requires a 120V AC wall
outlet receptacle installed according to all
local codes and ordinances.
To install, align the two tabs to corre-
spond with the two receptacles and push
until you hear a snap.
Wrap clamp cables after unplugging the
power cord from the AC wall outlet and
store your charger in a dry location.
3
USING AN EXTENSION CORD
The use of an extension cord is not rec-
ommended. If you must use an extension
cord, please make sure that you follow
these guidelines:
• Make sure that the wire size is large
enough for its length and for the AC
ampere rating, as specified in the chart
below.
MINIMUM RECOMMENDED EXTENSION CORD
• Make sure that the pins on charger's
power cord fit firmly into the extension
cord, and that the extension cord fits
firmly into the receptacle.
Length of Cord, in Feet
AWG* Size of Cord
25
18
50
16
100 150
12 10
*AWG=American Wire Gauge
• Checkthattheextensioncordisproperly
wired and in good electrical condition.
PREPARING YOUR BATTERY TO BE CHARGED
It is important that you read and follow these guidelines while you are preparing to charge
the battery.
• Make sure that you have a 6 or 12 volt
lead-acid battery. Determine voltage of
battery by referring to vehicle owner’s
manual or the battery markings. Charge
battery initially at charger’s lowest rate.
• Take time to read all of the battery
manufacturer’s specific precautions,
such as removing or not removing vent
capswhilecharging, andrecommended
rates of charge.
• Cleanthebatteryterminals.Becarefulto
keep corrosion from getting in or around
your eyes or on your hands.
• Be sure that the area around the bat-
tery is well ventilated while it is being
charged. Gas can be forcefully blown
away by using a piece of cardboard or
other nonmetallic material as a fan.
• Wearsafetyglasses.Seeadditional“Per-
sonal Safety Precautions” on page 3.
• If it is necessary to remove the battery
from the vehicle to charge it, always
remove the grounded terminal from the
battery first. Turn off all vehicle acces-
sories to avoid sparks from occurring.
• If required, for batteries with removable
ventcaps,adddistilledwatertoeachcell
until the battery acid reaches the level
recommendedbythemanufacturer.This
willhelppurgeexcessivegasesfromthe
cells.Becarefulnottooverfill.Ifyouhave
asealedbatterywithnon-removablevent
caps, no action is necessary.
• NOTE: Amarine (boat) battery installed
in a boat must be removed and charged
on shore.
OPERATING INSTRUCTIONS
NOTE: A marine (boat) boat battery must be removed and charged on shore. To charge
it on board requires equipment specially designed for marine use.
IMPORTANT: Follow all safety instructions and precautions when charging your battery.
Wear complete eye protection and clothing protection. Charge your battery in a well-
ventilated area.
CHARGING BATTERY IN THE
VEHICLE:
3. Note the polarity of the battery posts by
checkingtheidentificationmarksonthe
battery: POSITIVE (POS, P or +) and
NEGATIVE (NEG, N or -). The positive
post is usually larger than the negative
post.
1. Avoid personal injury by keeping clear
of fan blades, belts, pulleys and other
engine parts.
2. Avoiddamagingthechargerbykeeping
the power cord and output cords away
from the hood, door or moving engine
parts.
4. Identify which battery post is grounded
or connected to the chassis. THIS IS
NORMALLY THE NEGATIVE POST.
4
away from the battery, remove the out-
put clamp from the chassis or engine
block. Finally, remove the output clamp
from the battery post.
9. Clean and store the charger in a dry
location.
ChARGING BATTERY RE-
NEGATIVE GROUNDED SYS-
BAT-
POW-
TO
5. Connecting to a negative-grounded
system: Connect the red (POSITIVE)
output clamp to the POSITIVE post of
the battery. Rock and twist the clamp
back and forth to be sure a solid electri-
cal connection is made. Then connect
the black (NEGATIVE) output clamp
to a heavy, unpainted metal part of the
chassis or engine block, away from the
battery (see figure). DO NOT connect
clamptonegativebatterypost,carbure-
tor, fuel line or sheet metal part.
1. Note the polarity of the battery posts by
checkingtheidentificationmarksonthe
battery: POSITIVE (POS, P or +) and
NEGATIVE (NEG, N or -). The positive
post is usually larger than the negative
post.
Connecting to a positive-grounded
system: Connect the black (NEGA-
TIVE) output clamp to the NEGATIVE
post of the battery. Rock and twist the
clamp back and forth to be sure a solid
electricalconnectionismade.Thencon-
nect the red (POSITIVE) output clamp
to a heavy, unpainted metal part of the
chassis or engine block, away from
the battery. DO NOT connect clamp to
positive battery post, carburetor, fuel
line or sheet metal part.
2. Attach at least a 24-inch-long, 6-gauge
(AWG), insulated battery cable to
NEGATIVE (NEG, N or -) battery post.
Rockandtwisttheclampbackandforth
to be sure a solid electrical connection
is made.
3. Connect the red (POSITIVE) output
clamp to the POSITIVE battery post.
Rockandtwisttheclampbackandforth
to be sure a solid electrical connection
is made.
6. Plug power cord into a 120V AC wall
outlet. The charger will be set to the
default state of 12V REGULAR battery
type, no charge rate (tester mode). The
CONNECTED LED should be lit. If the
CONNECTED LED is not lit, check for
correct cable connections.
4. Position yourself as far away from the
battery as possible, and then connect
the black (NEGATIVE) output clamp to
the free end of the cable.
5. Plug the power cord into a 120V AC
wall outlet. The charger will be set to the
default state of 12V REGULAR battery
type, no charge rate (tester mode). The
CONNECTED LED should be lit. If the
CONNECTED LED is not lit, check for
correct cable connections.
7. Press the appropriate control buttons
to select the desired charge rate and
battery type. Within a few seconds,
the CHARGING (yellow) LED should
light and the charging process should
start.
8. To disconnect the charger, unplug its
powercordbeforeattemptingtodiscon-
nect the output clamps. Then, standing
6. Press the appropriate control buttons
to select the desired charge rate and
battery type. Within a few seconds,
5
the CHARGING (yellow) LED should
light and the charging process should
start.
NOTE:Duringthestartingsequencelisted
above, the charger is set to one of three
states.
7. To disconnect the charger, unplug its
powercordbeforeattemptingtodiscon-
nectthechargerclamps.Then,standing
away from the battery, remove the out-
put clamp from the NEGATIVE battery
post. Finally, remove the output clamp
from the POSITIVE battery post.
1. Wait for cranking - The charger
waits until the engine is actually being
cranked before delivering 125 amps
for engine start. The charger delivers
charge at a rate of up to 15 amps while
waiting and will reset if the engine
is not cranked within 15 minutes. (If
the charger resets, it sets itself for a
SMALL BATTERY charge and 12V
REGULAR BATTERY type.) While
waiting for cranking, the digital display
shows the battery voltage (it can’t be
set to percent).
8. Clean and store the charger in a dry
location.
USING ENGINE START
Your battery charger can be used to jump
start your car if the battery is low. Fol-
low these instructions on how to use the
ENGINE START feature.
2. Cranking - When cranking is detected,
thechargerwillautomaticallydeliverup
to its maximum output (at least 125A)
as required by the starting system for
up to 5 seconds or until the engine
cranking stops. The digital display
shows a countdown of the remaining
crank time in seconds. It starts at 5 and
counts down to 0.
IMPORTANT: Follow all safety instructions
and precautions when charging your bat-
tery. Wear complete eye protection and
clothing protection. Charge your battery
in a well-ventilated area.
IMPORTANT: Using the ENGINE START
feature WITHOUT a battery installed in
the vehicle could cause damage to the
vehicle’s electrical system.
3. Cool Down - After cranking, the char-
ger enters a mandatory 3-minute (180
second) cool down state. During this
period,nosettingscanbechanged.The
buttons are ignored. The digital display
indicates the remaining cool down time
in seconds. It starts at 180 and counts
down to 0. The ENGINE START LED
blinks once every second. During the
cool down period, no current is deliv-
ered to the battery. After 3 minutes, the
ENGINE START LED will stop blinking
andwilllightcontinuously,indicatingthat
anothercrankcyclecanbestarted.The
digital display will change from display-
ing the countdown back to displaying
the battery voltage. The CHARGING
LED will then be lit.
1. Forbatteryconnections,seepage4and
follow instructions 1 – 6 of CHARGING
BATTERY IN THE VEHICLE. With the
chargerpluggedinandconnectedtothe
batteryofthevehicle,presstheCHARGE
STARTbuttonuntiltheENGINESTART
LED is lit. Only the ENGINE START,
CHARGING,CONNECTED,andVOLT-
AGE LEDs should be lit, unless the 6V
REGULAR battery type has been se-
lected. In that case, the 6V REGULAR
LED will also be lit.
2. Crank the engine for no more than 5
seconds. If engine does not start, wait
3 minutes before cranking again.
ENGINE STARTING NOTES:
3. Aftertheenginestarts,unplugthepower
cord before disconnecting the output
clamps from the battery.
• If the battery is disconnected during
the cool down period, the charger will
reset.
4. Clean and store the charger in a dry
location.
6
USING YOUR BATTERY CHARGER
OVERVIEW
COMPLETION OF CHARGING:
Charge completion is indicated by
the CHARGED (green) LED; when
lit, the charger has stopped charging
and switched to the Maintain Mode of
operation, if the DEEP CYCLE battery type
was selected. For other battery types, the
CHARGED LED comes on when the bat-
tery is charged enough for normal use.
Using this battery charger is very simple.
First, connect the battery and AC power
following the precautions listed under
“OPERATINGINSTRUCTIONS”. Thense-
lect the appropriate BATTERY TYPE and
charge rate for your battery. The charger
will then do everything automatically. This
section explains a few details.
CHARGING: If the charger does not
detect a properly connected battery,
the CONNECTED (yellow) LED will not
light. Charging will not begin unless the
CONNECTED LED is on. When charging
begins, the CHARGING LED will be lit.
MAINTAIN MODE: When the CHARGED
(green) LED is lit, the charger has started
Maintain Mode. This mode of operation is
also known as Float-Mode Monitoring. In
this mode, the charger keeps the battery
fully charged by delivering a small amount
of current, when necessary. The voltage
is maintained at a level determined by the
BATTERY TYPE selected.
AUTOMATIC SHUT OFF: When the
SMALL BATTERY or REGULAR BAT-
TERY charge is selected, the charger
is set to perform an automatic charge.
When an automatic charge is performed,
the charger stops charging automatically
after the battery is charged.
NOTE: For battery types other than DEEP
CYCLE, the charged LED might be lit be-
fore Maintain Mode is started.
GENERAL CHARGING NOTES:
The charger is designed to control its
cooling fan for efficient operation. Con-
sequently, it is normal for the fan to start
and stop when maintaining a fully charged
battery. The fan does not run in Tester
Mode.
ABORTED CHARGE: If charging can’t
be completed normally, charging will be
aborted. When charging is aborted, the
charger’s output is shut off and the digital
display blinks on and off. In that state, the
charger ignores all buttons. To reset from
after an aborted charge, either disconnect
the battery or unplug the charger.
If the charge mode is changed after charg-
ing has started (by pressing the CHARGE
START or BATTERY TYPE button), the
charging process will be restarted.
DESULFATION MODE: If a battery is
left discharged for an extended period,
it could become sulfated and not accept
a normal charge. If the charger detects a
sulfated battery, the charger will switch to
a special mode of operation designed for
such batteries. Activation of the special
desulfation mode is indicated by blinking
the CHARGING LED. If successful, nor-
mal charging will resume after the battery
is desulfated. The CHARGING LED will
then stop blinking and light continuously.
Desulfation could take up to 10 hours. If
desulfation fails, charging will be aborted
and the digital display will blink.
The voltage displayed during charging
will usually be higher than the battery’s
resting voltage.
The voltage displayed during charging is
the battery voltage, not the RMS charg-
ing voltage.
7
CHARGER CONTROLS
DIGITAL DISPLAY
DIGITAL DISPLAY BUTTON
With the exception of AGM and gel cell
batteries, all other battery types may or
may not have vent caps. Vent caps are
located on top of the battery and provide a
meanstoadddistilledwaterwhenneeded.
Batteriesshouldbemarkedwiththeirtype.
If charging a battery that is not marked,
check the manual of the item that uses the
battery. If the battery type is unknown, use
the 12V REGULAR setting. Make sure the
batterycomplieswiththesafetyinstructions
on page 2.
Use this button to set the function of the
digital display to one of the following.
• BATTERY %: The digital display shows
an estimate of the percent of charge of
the battery connected to the charger
battery clamps.
• VOLTAGE:Thedigitaldisplayshowsthe
voltage at the charger battery clamps in
DC volts.
• ALTERNATOR %: The digital display
shows an estimated percentage of the
output of the vehicle charging system
connectedtothechargerbatteryclamps
as compared to a properly functioning
system.
CHARGE START BUTTON
Use this button to set the maximum charge
rate to one of the following.
• SMALL BATTERY: Provides 2A for
charging small batteries such as those
commonlyusedingardentractors,snow
mobiles and motorcycles. The 2A rate
is not intended to be used as a trickle
charger for larger batteries.
• REGULAR BATTERY: Automatically
switches between 15 and 40 amps, or
provides 15 amps continuous depend-
ing on the battery. Use for charging
automotive batteries, marine batteries,
and deep cycle batteries. Not intended
for industrial applications.
BATTERY TYPE BUTTON
Use this button to set the type of battery to
be charged to one of the following.
• 12V REGULAR: This is the type of
battery usually used in cars, trucks,
and motorcycles. These batteries have
vent caps and are often marked “low
maintenance” or “maintenance-free”.
• 12V DEEP CYCLE: Deep cycle batter-
ies are usually marked as “deep cycle”
or “marine”. Deep cycle batteries are
usually larger than the other types.
• 12V AGM/GEL: AGM and gel cell bat-
teries have sealed cases without vent
caps. Such batteries are often smaller
than the other types.
• ENGINESTART:Provides125ampsfor
cranking an engine with a weak or run
downbattery.Alwaysuseincombination
with a battery.
• 6V REGULAR: This is the type of bat-
tery usually used in antique and some
specializedvehicles.The6VREGULAR
batterytypeisnotselectableforbatteries
greater than 8.5V DC.
• OFF: Charger returns to tester mode
and the SMALL BATTERY, REGULAR
BATTERY and ENGINE START LEDs
all stay OFF.
8
CONTROL PANEL GUIDE
9
USING THE BUILT-IN BATTERY TESTER
OVERVIEW
TESTER WITHOUT TIME LIMIT
If either the DIGITAL DISPLAY or BAT-
TERY TYPE button is pressed within the
first 15 minutes after the PSC-12500A is
powered up, it will remain a tester (not a
charger) indefinitely, unless a charge rate
is selected.
This battery charger has a built-in battery
tester that displays either an accurate bat-
tery voltage or an estimate of the battery’s
relative charge based on the battery volt-
age and the Battery Council International
scale.
TESTING SEQUENCE
TESTING AFTER CHARGING
There are four basic steps required to use
the PSC-12500A as a battery tester.
After the PSC-12500A has been changed
from tester to charger (by selecting a
charge rate), it remains a charger. To
change the PSC-12500A back to a tester,
press the CHARGE START button until all
charge rate LEDs are off.
1. Connect the charger battery clamps to
the battery. Be sure to follow all of the
precautions listed under “OPERATING
INSTRUCTIONS”.
TESTER STATUS LEDs
2. Connect the charger power cord to a
120V AC wall outlet. Again, be sure to
follow all of the precautions listed under
“OPERATING INSTRUCTIONS”.
When the PSC-12500A is operating as a
battery tester, the status LEDs light under
the following conditions:
• The CHARGED (green) LED will light if
a charged battery is tested.
3. If necessary, press the BATTERY
TYPE button until the correct type is
indicated.
• The CHARGING (yellow) LED does not
light in the battery test mode.
4. Read the voltage on the digital display
or press the DIGITAL DISPLAY button
to set the tester to BATTERY % and
read the battery percent.
• TheCONNECTEDLEDlightsifaproperly
connected battery is detected.
• When the tester digital display is set to
VOLTAGE,theCHARGEDandCHARG-
ING LEDs won't light (it could be testing
a battery or an alternator).
TESTER AND CHARGER
When first turned on, the PSC-12500A
operates only as a tester, not as a charger.
To continue to use it as only a tester, avoid
pressing the CHARGE START button. Se-
lecting a charge rate activates the battery
charger and deactivates the tester. Press-
ing the CHARGE START button when the
ENGINE START LED is lit (except during
the 180 second cool down) will shut off the
charger and activate the tester.
INITIAL PERCENT CALCULATION
When a battery % is calculated for the first
time after connecting a battery, the digital
display will show three dashes (“---”) for a
period as long as several seconds while
the tester analyzes the battery.
NOTES FOR TESTING BATTERY %
A recently charged battery could have a
temporarily high voltage due to what is
known as “surface charge”. The voltage
of such a battery will gradually drop during
the period immediately after the charging
system is disengaged. Consequently, the
tester could display inconsistent values
POWER-UP IDLE TIME LIMIT
If no button is pressed within 15 minutes
after the PSC-12500A is first powered up,
it will automatically switch from tester to
charger, if a battery is connected. In that
case, the charger will be set for the SMALL
BATTERYcharge rate and 12V REGULAR
battery type.
10
for such a battery. For a more accurate
reading, the surface charge should be
removed by temporarily creating a load on
the battery, such as by turning on lights or
other accessories.
The battery % ranges from 0 to 100.
The battery tester is only designed to test
batteries. Testing a device with a rapidly
changing voltage could yield unexpected
or inaccurate results.
USING THE BUILT-IN ALTERNATOR TESTER
This battery charger has a built-in alterna-
tor tester that displays either an accurate
alternator voltage or an estimate of the
alternator’s relative output compared
to normal alternators. The Alternator %
values displayed should be taken as
general reference, not precise diagnosis.
The alternator tester functions the same
as the battery tester (see previous sec-
tion of this manual for details) with a few
differences.
TESTER STATUS LEDs
When the PSC-12500A is operating as
an alternator tester, the status LEDs light
under the following conditions.
• The CHARGED (green) LED will light if
the output of the charging system is at
the normally desired level.
• The CHARGING (yellow) LED does not
light in the alternator test mode.
• TheCONNECTEDLEDlightsifaVOLT-
AGE is detected.
TESTING SEQUENCE
• When the tester display mode is set to
VOLTAGE,theCHARGEDandCHARG-
ING LEDs won't light (it could be testing
a battery or an alternator).
There are three basic steps required to
use the PSC-12500A as an alternator
tester.
1. Connect the charger battery clamps to
the battery or charging system. Be sure
to follow all of the precautions listed un-
der “OPERATING INSTRUCTIONS”.
ALTERNATOR TESTING NOTES
• Thealternatorpercentdisplaycanrange
from 0 to 199.
2. Connect the charger power cord to a
120V AC wall outlet. Again, be sure to
followalloftheprecautionslistedunder
“OPERATING INSTRUCTIONS”.
• The DIGITAL DISPLAY cannot be set
to ALTERNATOR % during charging.
3. Startthevehicleandturnonthevehicle’s
headlights. Read the voltage on the
digital display or press the DIGITAL
DISPLAY button to set the tester to AL-
TERNATOR % and read the alternator
percent.
11
BATTERY PERCENT AND CHARGE TIME
This charger adjusts the charging time in
order to charge the battery completely,
efficiently and safely. The microproces-
sor automatically makes the necessary
decisions. However, this section includes
guidelines that can be used to estimate
charging times.
There are some important facts to keep in
mind when charging a battery.
• When the display indicates 77%
charged, the battery has been charged
enough to start most vehicles and has
already been charged as much as by
many other battery chargers.
The duration of the charging process
depends on three factors:
• Whenthedisplayindicates85%charged,
thebatteryhasalreadybeenchargedat
least as much as by most other battery
chargers.
1. Battery State – If a battery has only
been slightly discharged, it can be
charged in less than a few hours. The
same battery could take up to 10 hours
if very weak. The battery state can be
estimated by using the built-in tester
(see page 10). The lower the reading
the longer charging will take.
• The battery % shown in tester mode is
anestimatebasedonthebatteryvoltage
and the Battery Council International
scale. The battery % shown in charger
modeisanestimateoftherelativecharge
in the battery compared to the charge it
should have if the charging process is
allowed to complete.
2. Battery rating – A higher rated battery
will take longer to charge than a lower
ratedbatteryunderthesameconditions.
Abatteryisratedinampere-hours(AH),
reservecapacity(RC)andcoldcranking
amps (CCA). The lower the rating the
quicker the battery will be charged.
• Thebattery%shownintestermodecan
be used to estimate the relative charge
time. The lower the % shown, the longer
the charge time for a given battery.
3. Charge rate – The charge rate is mea-
sured in amps. This charger provides
charge rates of 2A, 15A and 40A. The
125A rate is for engine start only. The
2A rate is for charging smaller batteries
suchasthoseusedformotorcyclesand
garden tractors. Such batteries should
not be charged using the REGULAR
BATTERY setting. The 15A and 40A
rates are for charging larger batteries.
Intheregularbatterymode,thecharger
begins at the 15A rate and increases
the charge rate if it is determined that
the battery can accept the 40A rate.
All charging modes will decrease the
charge rate as the battery approaches
maximum charge.
• The battery % shown in charger mode
is an indication of the relative progress
of the charging process. The higher the
battery%displayed,thelesschargetime
remains.
• The more a battery is discharged, the
faster it absorbs charge from a charger.
Thatmeansthatthebattery%increases
faster at the beginning of the charging
process than at the end. In other words,
it takes longer for the battery to absorb
the last few percent of charge than the
first several percent.
After the charging process has started, the
digital display can be used to determine
charging progress by selecting the BAT-
TERY % mode.
12
CHARGING TIPS
Read this entire manual before using your charger. The tips below serve only as a guide
for specific situations.
If your vehicle won’t start: You don’t
need to fully charge a battery to start your
vehicle. If the charger won’t start your
vehicle using the ENGINE START rate, try
charging the battery using the REGULAR
BATTERY rate for 10 or 15 minutes. That
should charge the battery enough to al-
low the ENGINE START rate to start the
vehicle. If the vehicle will then be operated
continuously for an extended period (such
as a long drive), the vehicle could charge
the battery back to normal during that
period. If the vehicle will only be operated
for a short period (short drive), the battery
might need to be charged again before it
could start the vehicle again.
Reviving your battery: If you only wish
to charge your battery enough to operate
your vehicle, you don’t need to wait for the
entire charging process to be completed.
When the charger displays a battery %
of 77 or more (see page 12), the battery
has usually been charged enough for the
vehicle to start and operate normally.
Completing an interrupted charge: If
the charging process has been interrupted
and restarted after the charger displays a
battery % of 85 or more, the charger could
go straight to Maintain Mode (see page 7).
However, if the original charge was started
using the REGULAR BATTERY rate, the
charge can often be completed using the
SMALL BATTERY setting.
MAINTENANCE AND CARE
A minimal amount of care can keep your battery charger working properly for years.
1. Clean the clamps each time you are finished charging. Wipe off any battery fluid
that may have come in contact with the clamps to prevent corrosion.
2. Coil the input and output cords neatly when storing the charger. This will help pre-
vent accidental damage to the cords and charger.
3. Occasional cleaning of the case of the charger with a soft cloth will keep the finish
shiny.
13
TROUBLESHOOTING
Performance problems often can be corrected by the user. Please read through this chart
for a possible solution to common problems.
PROBLEM
POSSIBLE CAUSE
SOLUTION
The battery is connected
and the charger is on,
but isn't charging.
The charger is in tester
mode, not charger mode.
Press the CHARGE
START button to activate
charging and select a
charge rate.
Indicator lights are lit in
an erratic manner not
explained in the “Using
Your Battery Charger”
section.
You might have acciden-
tally activated a special
diagnostic mode.
Make sure nothing is
touching the control
panel, then unplug the
charger and plug it in
again.
The charger may be
defective.
Return to place of pur-
chase for replacement.
The DIGITAL DISPLAY
always flashes before
the battery is completely
charged.
The incorrect BATTERY
TYPE may have been
selected.
Reset the charger by
briefly unplugging it or
briefly disconnecting the
negative battery clip. Se-
lect the desired charge
rate (SMALL or REGU-
LAR BATTERY) and
BATTERY TYPE again, if
necessary.
This will happen if the
battery did not reach full
charge within 24 hours.
May be due to a very large
battery or a bank of batter-
ies requiring more power
than a 1540 amp
charger can deliver within
24 hours. The battery may
also be faulty.
Engine crank time is less
than specified.
Starter motor may be
drawing more than 125
amps.
Charge the battery at the
REGULAR BATTERY
rate for 10 to 15 minutes
then crank the engine.
The green CHARGED
LED lights a few minutes
after connecting to the
battery.
The battery may be
fully charged or recently
charged, leaving the bat-
tery voltage high enough
to appear to be fully
charged.
If the battery is in a ve-
hicle, turn the headlights
on for a few minutes
to reduce the battery
voltage and try charging
again.
The incorrect BATTERY
TYPE may have been
selected.
Reset the charger by
briefly unplugging it or
briefly disconnecting the
negative battery clip.
Select the desired charge
rate (SMALL or REGU-
LAR BATTERY) and
BATTERY TYPE again, if
necessary.
14
WARRANTY
SCHUMACHER ELECTRIC CORPORATION,
801 BUSINESS CENTER DRIVE,
MOUNT PROSPECT, ILLINOIS 60056-2179
MAKES THIS LIMITED WARRANTY TO THE ORIGINAL PURCHASER AT RETAIL OF
THIS PRODUCT. THIS LIMITED WARRANTY IS NOT TRANSFERABLE.
Schumacher Electric Corporation warrants this battery charger for five years from date
of purchase at retail against defective material or workmanship. If such should occur, the
unit will be repaired or replaced at the option of the manufacturer. It is the obligation of
the purchaser to forward the unit together with proof of purchase, transportation and/or
mailing charges prepaid to the manufacturer or its authorized representative.
This limited warranty is void if the product is misused, subjected to careless handling, or
repaired by anyone other than the manufacturer or its authorized representative.
The manufacturer makes no warranty other than this limited warranty and expressly
excludes any implied warranty including any warranty for consequential damages.
THIS IS THE ONLY EXPRESS LIMITED WARRANTYAND THE MANUFACTURER NEI-
THER ASSUMES NOR AUTHORIZES ANYONE TO ASSUME OR MAKE ANY OTHER
OBLIGATION TOWARDS THE PRODUCT OTHER THAN THIS EXPRESS LIMITED
WARRANTY. THE MANUFACTURER MAKES NO WARRANTY OF MERCHANTABIL-
ITY OR FITNESS FOR PURPOSE OF THIS PRODUCTAND EXPRESSLY EXCLUDES
SUCH FROM THIS LIMITED WARRANTY.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES OR LENGTH OF IMPLIED WARRANTY SO THE
ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTSAND YOU MAYALSO HAVE
OTHER RIGHTS THAT VARY FROM STATE TO STATE.
WARRANTY VALIDATION: The enclosed “Warranty Validation Card” must be completed
and mailed within 10 days of product purchase to activate this limited warranty.
15
|