Page 1
0099001453-00
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.
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.
Model / Modelo:
28.71344
6V/12V Automatic
Battery Charger
& Engine Starter
6V / 12V Cargador
de baterías
automático
y arrancador
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DIEHARD® TRES AÑOS DE GARANTÍA TOTAL
Cuando se opere o maneje con las debidas precauciones de acuerdo a las instrucciones,
si el DieHard® falla en alguno de sus componentes de fabricación durante los 3 años
contados a partir de la fecha de compra, regresarlo al autoservicio DieHard® en los estados
unidos para reemplazar el aparato sin costo alguno.
Esta garantía le otorga derechos legales especícos, así como otros derechos, que varían
de estado a estado.
Sears Brands Management Corporation, Hoffman Estates, IL 60179
PARA ASISTENCIA AL CLIENTE O REPUESTOS,
LLAME GRATIS AL 7 AM-5 PM CT
LUNES A VIERNES: 1-800-SEARS-64 (1-800-732-7764)
DIEHARD® THREE-YEAR FULL WARRANTY
When operated and maintained according to all supplied instructions, if this DieHard®
product fails due to a defect in material or workmanship within 3 years from the date
of purchase, return it to any DieHard® outlet in the United States for free replacement.
This warranty gives you specic legal rights, and you may also have other rights
which vary from state to state.
Sears Brands Management Corporation, Hoffman Estates, IL 60179
FOR CUSTOMER ASSISTANCE OR REPLACEMENT PARTS,
CALL 1-800-SEARS-64 (1-800-732-7764) TOLL-FREE
FROM 7 AM TO 5 PM CT.
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1. IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS.
1.1 SAVE THESE INSTRUCTIONS –
This manual contains important safety
and operating instructions.
1.2 Do not expose the charger to rain or snow.
1.3 Use of an attachment not recommended
or sold by the battery charger
manufacturer may result in a risk of re,
electric shock or injury to persons.
1.4 To reduce the risk of damage to electric
plug and cord, pull by the plug rather than
the cord when disconnecting charger.
1.5 An extension cord should not be used
unless absolutely necessary. Use of
improper extension cord could result
in a risk of re and electric shock. If an
extension cord must be used, make sure:
• That the pins on plug of extension cord
are the same number, size and shape as
those of plug on charger.
• That extension cord is properly wired and
in good electrical condition; and
• That wire size is large enough for AC
ampere rating of charger as specied in
the section 8.
1.6 Do not operate charger with damaged
cord or plug – replace the cord or plug
immediately.
1.7 Do not operate charger if it has received
a sharp blow, been dropped, or otherwise
damaged in any way; take it to a qualied
serviceman.
1.8 Do not disassemble charger; take it to
a qualied serviceman when service or
repair is required. Incorrect reassembly
may result in a risk of electric shock or re.
1.9 To reduce risk of electric shock, unplug
charger from outlet before attempting
any maintenance or cleaning. Turning off
controls will not reduce this risk.
1.10 WARNING: RISK OF EXPLOSIVE
GASES.
a. WORKING IN VICINITY OF A LEAD-
ACID BATTERY IS DANGEROUS.
BATTERIES GENERATE EXPLOSIVE
GASES DURING NORMAL BATTERY
OPERATION. FOR THIS REASON, IT
IS OF UTMOST IMPORTANCE THAT
YOU FOLLOW THE INSTRUCTIONS
EACH TIME YOU USE THE
CHARGER.
b. 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 marking on these
products and on engine.
1.11 Pursuant to California Proposition 65, this
product contains chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Wash hands after handling.
1.12 Keep out of reach of children.
2. PERSONAL SAFETY PRECAUTIONS
2.1 Consider having someone close enough
by to come to your aid when you work
near a lead-acid battery.
2.2 Have plenty of fresh water and soap
nearby in case battery acid contacts skin,
clothing, or eyes.
2.3 Wear complete eye protection and
clothing protection. Avoid touching eyes
while working near battery.
2.4 If battery acid contacts skin or clothing,
wash immediately with soap and water.
If acid enters eye, immediately ood
eye with running cold water for at least
10 minutes and get medical attention
immediately.
2.5 NEVER smoke or allow a spark or ame
in vicinity of battery or engine.
2.6 Be extra cautious to reduce risk of
dropping a metal tool onto battery. It might
spark or short-circuit battery or other
electrical part that may cause explosion.
2.7 Remove personal metal items such as
rings, bracelets, necklaces, and watches
when working with a lead-acid battery. A
lead-acid battery can produce a shortcircuit current high enough to weld a ring
or the like to metal, causing a severe burn.
2.8 Use charger for charging only 6 and 12V
LEAD-ACID, AGM and GEL-type
rechargeable batteries. It is not intended
to supply power to a low voltage electrical
system other than in a starter-motor
application. Do not use battery charger
for charging dry-cell batteries that are
commonly used with home appliances.
These batteries may burst and cause injury
to persons and damage to property.
2.9 NEVER charge a frozen battery.
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3. PREPARING TO CHARGE
3.1 If necessary to remove battery from
vehicle to charge, always remove
grounded terminal from battery rst. Make
sure all accessories in the vehicle are off,
so as not to cause an arc.
3.2 Be sure area around battery is well
ventilated while battery is being charged.
3.3 Clean battery terminals. Be careful to
keep corrosion from coming in contact
with eyes.
3.4 Add distilled water in each cell until
battery acid reaches level specied by
battery manufacturer. Do not overll. For a
battery without removable cell caps, such
as valve regulated lead acid batteries,
carefully follow manufacturer’s recharging
instructions.
3.5 Study all battery manufacturer’s
specic precautions while charging and
recommended rates of charge.
3.6 Determine voltage of battery by referring
to car owner’s manual and make sure that
output voltage selector switch is set at
correct voltage. If charger has adjustable
charge rate, charge battery initially at
lowest rate.
4. CHARGER LOCATION
4.1 Locate charger as far away from battery
as DC cables permit.
4.2 Never place charger directly above
battery being charged; gases from battery
will corrode and damage charger.
4.3 Never allow battery acid to drip on
charger when reading electrolyte specic
gravity or lling battery.
4.4 Do not operate charger in a closed-in
area or restrict ventilation in any way.
4.5 Do not set a battery on top of charger.
5. DC CONNECTION PRECAUTIONS
5.1 Connect and disconnect DC output clips
only after setting any charger switches to
“off” position and removing AC cord from
electric outlet. Never allow clips to touch
each other.
5.2 Attach clips to battery and chassis, as
indicated in the sections 6 and 7.
6. FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN VEHICLE
A SPARK NEAR THE BATTERY MAY
CAUSE A BATTERY EXPLOSION. TO
REDUCE THE RISK OF A SPARK NEAR
THE BATTERY:
6.1 Position AC and DC cords to reduce risk
of damage by hood, door, or moving
engine part.
6.2 Stay clear of fan blades, belts, pulleys, and
other parts that can cause injury to persons.
6.3 Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has larger
diameter than NEGATIVE (NEG, N,–) post.
6.4 Determine which post of battery is
grounded (connected) to the chassis. If
negative post is grounded to chassis (as
in most vehicles), see (6.5). If positive
post is grounded to the chassis, see (6.6).
6.5 For negative-grounded vehicle, connect
POSITIVE (RED) clip from battery charger
to POSITIVE (POS, P, +) ungrounded post
of battery. Connect NEGATIVE (BLACK)
clip to vehicle chassis or engine block
away from battery. Do not connect clip to
carburetor, fuel lines, or sheet-metal body
parts. Connect to a heavy gage metal part
of the frame or engine block.
6.6 For positive-grounded vehicle, connect
NEGATIVE (BLACK) clip from battery
charger to NEGATIVE (NEG, N, –)
ungrounded post of battery. Connect
POSITIVE (RED) clip to vehicle chassis
or engine block away from battery. Do
not connect clip to carburetor, fuel lines,
or sheet-metal body parts. Connect to
a heavy gage metal part of the frame or
engine block.
6.7 When disconnecting charger, turn
switches to off, disconnect AC cord,
remove clip from vehicle chassis, and
then remove clip from battery terminal.
6.8 See Operating Instructions for length of
charge information.
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7. FOLLOW THESE STEPS WHEN BATTERY IS OUTSIDE VEHICLE
A SPARK NEAR THE BATTERY MAY
CAUSE A BATTERY EXPLOSION. TO
REDUCE THE RISK OF A SPARK NEAR
THE BATTERY:
7.1 Check polarity of battery posts. POSITIVE
(POS, P, +) battery post usually has a larger
diameter than NEGATIVE (NEG, N, –) post.
7.2 Attach at least a 24-inch-long 6-gauge
(AWG) insulated battery cable to
NEGATIVE (NEG, N, –) battery post.
7.3 Connect POSITIVE (RED) charger clip to
POSITIVE (POS, P, +) post of battery.
7.4 Position yourself and free end of cable as
far away from battery as possible – then
connect NEGATIVE (BLACK) charger clip
to free end of cable.
7.5 Do not face battery when making nal
connection.
7.6 When disconnecting charger, always do
so in reverse sequence of connecting
procedure and break rst connection
while as far away from battery as
practical.
7.7 A marine (boat) battery must be removed
and charged on shore. To charge it on
board requires equipment specially
designed for marine use.
8. GROUNDING AND AC POWER CORD CONNECTIONS
This battery charger is for use on a nominal
120 volt circuit and has a grounded plug.
The charger must be grounded, to reduce
the risk of electric shock. The plug must
be plugged into an outlet that is properly
installed and grounded in accordance with
all local codes and ordinances. The plug
pins must t the receptacle (outlet). Do not
use with an ungrounded system.
DANGER: Never alter the AC cord or
plug provided – if it does not t the outlet,
have a proper grounded outlet installed
by a qualied electrician. An improper
connection can result in a risk of an
electric shock or electrocution.
NOTE: Pursuant to Canadian
Regulations, use of an adapter plug
is not allowed in Canada. Use of an
adapter plug in the United States is not
recommended and should not be used.
USING AN EXTENSION CORD
The use of an extension cord is not
recommended. If you must use an
extension cord, follow these guidelines:
• Pins on plug of extension cord must be
the same number, size, and shape as
those of plug on charger.
• Ensure that the extension cord is
properly wired and in good electrical
condition.
• Wire size must be large enough for
the AC ampere rating of charger, as
specied:
Length of cord (feet) 25 50 100 150
AWG* size of cord 10 10 10 8
*AWG-American Wire Gauge
9. ASSEMBLY INSTRUCTIONS
9.1 It is important to fully assemble your
charger before use. Remove all cord
wraps and uncoil the cables prior to
using the battery charger. Follow these
instructions for assembly.
Parts Included
(2) #8 x 0.25" screws (A)
(2) #10 x 1.0" screws (B)
(1) handle
Tools Needed
Phillips-head screwdriver (not included)
9.2 Attach the handle: Place each end of
handle into its bracket, aligning with the
screw holes. Insert screws as shown.
Plug the cable into the port, as shown (C).
IMPORTANT: Port is ONLY for plugging
in the charger handle. It is not compatible
with any other equipment.
CAUTION: Take care not to pinch or damage
cable during handle installation. Charger will
not function properly if this cable is damaged.
(A)
(B)
(C)
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10. CONTROL PANEL
DIGITAL DISPLAY
The digital display indicates the status of
the battery and charger. See the Display
Messages section for a complete list of
messages.
DISPLAY MODE BUTTON
Use this button to set the function of the
digital display to one of the following:
• Battery % – The digital display shows
an estimated charge percentage of
the battery connected to the charger’s
battery clamps.
• Alternator % – The digital display shows
an estimated output percentage of the
vehicle’s charging system connected to
the charger’s battery clamps, compared
to a properly functioning system. The
alternator percent range is from 0 to
100%. Readings below 0 (13.2 volts) will
read LOW and readings above 100%
(14.6 volts) will read HI.GH. If you get a
HI.GH or LOW reading, have the electrical
system checked by a qualied technician.
• Voltage – The Digital Display shows the
voltage at the charger battery clamps, in
DC volts.
RATE SELECTION BUTTON
Use this button to select one of the
following:
• 2A CHARGE – For charging small
batteries, such as those commonly used
in garden tractors, snowmobiles and
motorcycles.
• 20A FAST or 60A RAPID CHARGE –
For charging automotive, marine and
light truck batteries. Not intended for
industrial applications.
• ENGINE START – Provides high
amperage for cranking an engine with a
weak or run-down battery. Always use in
combination with a battery.
NOTE: Once the charger has started
charging the battery, if you press the Rate
Selection button once, the output current
is shut off and the display with show OFF
and then the battery voltage. If you press
the Rate Selection button again, the
current will go back on at the same setting
it was when it was turned off.
LED INDICATORS
REVERSED (red) LED lit: The clamps
are not properly connected to the battery.
CHARGING (yellow/orange) LED lit:
The charger is charging the battery.
CHARGING (yellow/orange) LED
ashing: The charger is in abort mode.
CHARGED/MAINTAINING (green) LED
lit: The battery is fully charged and the
charger is in maintain mode.
NOTE: See the Operating Instructions
section for a complete description of the
charger modes.
BATTERY TYPE BUTTON
Use this button to set the type of battery.
• STANDARD – Used in cars, trucks
and motorcycles, these batteries have
vent caps and are often marked “low
maintenance” or “maintenance-free”.
This type of battery is designed to
deliver quick bursts of energy (such as
starting engines) and has a greater plate
count. The plates are thinner and have
somewhat different material composition.
Standard batteries should not be used for
deep-cycle applications.
•AGM – The Absorbed Glass Mat
construction allows the electrolyte to
be suspended in close proximity with
the plate’s active material. In theory,
this enhances both the discharge and
recharge efciency. The AGM batteries
are a variant of Sealed VRLA (valve
regulated lead-acid) batteries. Popular
uses include high-performance engine
starting, power sports, deep-cycle, solar
and storage batteries.
• GEL – The electrolyte in a GEL cell has
a silica additive that causes it to set up
or stiffen. The recharge voltages on this
type of cell are lower than those for other
styles of lead-acid battery. This is probably
the most sensitive cell in terms of adverse
reactions to overvoltage charging. Gel
batteries are best used in VERY DEEP
cycle application and may last a bit longer
in hot weather applications. If the wrong
battery charger is used on a gel cell
battery, poor performance and premature
failure will result.
•DIEHARD PLATINUM – Select this
option only if your battery is a DieHard
Platinum battery. NOTE: When DieHard
Platinum is selected, the recommended
charge rate is 60A.
TWO TOGGLE SWITCHES
These are found on the base of the unit.
• ON/OFF SWITCH
• VOLTAGE SELECTOR SWITCH
Select 6V or 12V.
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11. OPERATING INSTRUCTIONS
WARNING: A spark near battery may
cause an explosion.
IMPORTANT: Do not start the vehicle with
the charger connected to the AC outlet, or
it could damage the charger.
NOTE: This charger is equipped with
an auto-start feature. Current will not be
supplied to the battery clamps until a
battery is properly connected. The clamps
will not spark if touched together.
CHARGING A BATTERY
IN THE VEHICLE
1. Turn off all the vehicle’s accessories.
2. Keep the hood open.
3. Clean the battery terminals.
4. Place the charger on a dry, non-
ammable surface.
5. Lay the AC/DC cables away from any
fan blades, belts, pulleys and other
moving parts.
6. Make sure the ON/OFF switch is set
to OFF.
7. Connect the battery, following the
precautions listed in sections 6 and 7.
8. Connect the charger to an electrical
outlet.
9. Press the ON/OFF switch to turn ON.
10. When the charger starts, the display
will show DIEHARD.
11. Select the battery type and charge rate.
Charging will then begin automatically.
See section 12 for CHARGING
message details.
12. The yellow/orange LED will light, and
the display will show ANALYZING
BATTERY while the charger determines
that the battery is properly connected
and the condition of the battery.
13. When charging is complete, press the
ON/OFF switch to turn OFF, disconnect
the charger from the AC power, remove
the clamps from the vehicle’s chassis,
and then remove the clamp from the
battery terminal.
CHARGING A BATTERY OUTSIDE
OF THE VEHICLE
1. Place battery in a well-ventilated area.
2. Clean the battery terminals.
3. Make sure the ON/OFF switch is set
to OFF.
4. Connect the battery, following the
precautions listed in sections 6 and 7.
5. Connect the charger to the electrical
outlet.
6. Press the ON/OFF switch to turn ON.
7. When the charger starts, the display
will show DIEHARD.
8. Select the battery type and charge rate.
Charging will then begin automatically.
See section 12 for CHARGING
message details.
9. The yellow/orange LED will light, and
the display will show ANALYZING
BATTERY while the charger determines
that the battery is properly connected
and the condition of the battery.
10. When charging is complete press the
ON/OFF switch to turn OFF, disconnect
the charger from the AC power,
disconnect the negative clamp, and
nally the positive clamp.
11. A marine (boat) battery must be
removed and charged on shore.
AUTOMATIC CHARGING MODE
When an Automatic Charge is performed,
the charger switches to the maintain mode
automatically after the battery is charged.
BATTERY CONNECTION INDICATOR
If the charger does not detect a properly
connected battery, charging will not start
and the digital display will show one
of two messages. If the display shows
CONNECT CLAMPS, make sure the
charger is connected to the battery and the
connection points are clean and making
a good connection. If the display shows
WARNING CLAMPS REVERSED, press
the ON/OFF switch to turn off, unplug
the charger from the AC outlet and then
reverse the connections at the battery.
CHARGE COMPLETION AND MAINTAIN
MODE (FLOAT MODE MONITORING)
Charge completion is indicated by the solid
green LED and the digital display showing
FULLY CHARGED AUTO MAINTAINING.
This means that the charger has stopped
charging and has switched to the Maintain
Mode of operation. NOTE: If the charger
has to provide its maximum maintain
current for a continuous 12 hour period,
it will go into Abort Mode (see Aborted
Charge section). This is usually caused by
a drain on the battery, or the battery could
be bad. Make sure there are no loads on
the battery. If there are, remove them. If
there are none, have the battery checked
or replaced.
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BATTERY CHARGING TIMES
Use the following table to determine the time it will take to bring a battery to full charge.
Ah – Ampere Hours CCA – Cold Cranking Amps
RC – Reserve Capacity NR – NOT RECOMMENDED.
BATTERY SIZE/RATING
CHARGE RATE/CHARGING TIME
2 AMP 20 AMP 60 AMP
SMALL
BATTERIES
Motorcycle,
garden tractor, etc.
6-12 Ah 2-3¾ h NR NR
12-32 Ah 3¾-10 h NR NR
CARS/
TRUCKS
200-315 CCA 40-60 RC 11¼-14½ h 1-1½ h 23-29 min
315-550 CCA 60-85 RC NR 1½-2 h 29-37 min
550-1000 CCA 80-190 RC NR 2-3½ h 37-70 min
MARINE/DEEP-CYCLE
80 RC NR 1¾ h NR
140 RC NR 2¾ h NR
160 RC NR 3 h NR
180 RC NR 3¼ h NR
The times given are for batteries with a 50% charge prior to recharging.
MAINTAINING A BATTERY
The 28.71344 maintains 6 and 12 volt
batteries, keeping them at full charge.
It is not recommended for industrial
applications.
NOTE: The maintain mode technology
allows you to safely charge and maintain
a healthy battery for extended periods
of time. However, problems with the
battery, electrical problems in the
vehicle, improper connections or other
unanticipated conditions could cause
excessive current draws. As such,
occasionally monitoring your battery and
the charging process is required.
DESULFATION MODE
If the battery is left discharged for an
extended period of time, 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.
If successful, normal charging will resume
after the battery is desulfated. Desulfation
could take up to 8 hours. If desulfation
fails, charging will abort, the yellow/orange
LED will ash, and the display will show
CHARGING ABORTED BAD BATTERY.
ABORTED CHARGE
If charging cannot be completed normally,
charging will abort. When charging aborts,
the charger’s output is shut off, the yellow/
orange LED will ash, and the display
will show CHARGING ABORTED BAD
BATTERY. To reset after an aborted
charge, unplug the charger from the outlet,
wait a few moments and plug it back in.
USING THE ENGINE START SETTING
Your battery charger can be used to jump
start your car if the battery is low. Follow
all safety instructions and precautions for
charging your battery. Wear complete eye
protection and protective clothing.
WARNING: Using the ENGINE START
setting WITHOUT a battery installed in
the vehicle could cause damage to the
vehicle’s electrical system.
NOTE: If you have charged the battery
and it still will not start your car, do not
use the Engine Start setting, or it could
damage the vehicle’s electrical system.
Have the battery checked.
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery, following the instructions given
in sections 6 and 7.
2. With the charger plugged in and
connected to the battery and chassis,
press the ON/OFF switch to turn ON,
and then press the RATE SELECTION
button until the ENGINE START LED
is lit.
3. When the display shows ENGINE
START READY, crank the engine
until it starts or 3 seconds pass. If the
engine does not start, wait 3 minutes
(until the display shows ENGINE
START READY) before cranking
again. This allows the charger and
battery to cool down.
NOTE: During extremely cold weather,
or if the battery is under 2 volts, charge
the battery for 5 minutes before cranking
the engine.
4. If the engine fails to start, charge the
battery for 5 more minutes before
attempting to crank the engine again.
5. After the engine starts, press the ON/
OFF switch to turn OFF, unplug the
AC power cord before disconnecting
the battery clamps from the vehicle.
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• 9 •
NOTE: If the engine does turn over but
never starts, there is not a problem with
the starting system; there is a problem
somewhere else with the vehicle. STOP
cranking the engine until the other problem
has been diagnosed and corrected.
ENGINE STARTING NOTES
During the starting sequence, the charger
is set to one of three states:
•Wait for cranking – The charger waits
until the engine is actually being cranked
before delivering the amps for engine
start and will reset if the engine is not
cranked within 15 minutes. (If the charger
resets, it sets itself to the default start up
settings). While waiting for cranking, the
digital display shows the battery charged
percentage (it cannot be set to voltage).
After 5 seconds, the display will change
to ENGINE START READY.
•Cranking – When cranking is detected,
the charger will automatically deliver up
to its maximum output 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.
•Cool Down – After cranking, the charger
enters a mandatory 3 minute (180 second)
cool down state. The digital display will
show ENGINE START COOL DOWN XXX
SECONDS REMAINING. It starts at 180
and counts down to 0. After 3 minutes,
the digital display will change to ENGINE
START READY. The CHARGING (yellow/
orange) LED will then be lit.
USING THE BATTERY VOLTAGE TESTER
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery, following the instructions given
in previous sections.
2. Plug the charger’s AC power cord into
the AC outlet.
3. Press the ON/OFF switch to turn ON.
4. If necessary, press the BATTERY TYPE
button until the correct type is indicated.
5. Read the voltage on the digital display.
Keep in mind that this reading is only a
battery voltage reading; a false surface
charge may mislead you. Compare the
reading to the following chart.
6V Battery
Voltage
Reading
12V Battery
Voltage
Reading
Battery
Condition
6.4 or more 12.8 or more Charged
6.1 to 6.3 12.2 to 12.7
Needs
charging
Less than
6.1
Less than
12.2
Discharged
TESTER AND CHARGER
When rst turned on, the unit operates only
as a tester, not as a charger. Selecting a
charge rate activates the battery charger
and deactivates the tester. Pressing the
RATE SELECTION button when the
ENGINE START LED is lit (except during
the 180 second cool down) will shut off the
charger and activate the tester.
POWER-UP IDLE TIME LIMIT
If no button is pressed within 10 minutes
after the battery charger is rst powered
up, the charger will automatically switch
from tester to charger if a battery is
connected. In that case, the charger will be
set to charge at the 2A charge rate and Gel
battery type.
TESTER WITHOUT TIME LIMIT
If either the DISPLAY MODE or BATTERY
TYPE button is pressed within the rst
10 minutes after the battery charger is
powered up, the unit will remain a tester
(not a charger) indenitely, unless a
charge rate is selected.
TESTING AFTER CHARGING
After the unit has been changed from
tester to charger (by selecting a charge
rate), it remains a charger. To change the
battery charger back to a tester, press the
RATE SELECTION button until all charge
rate LEDs are off.
NOTE: 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 ALTERNATOR
PERFORMANCE TESTER
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery, following the instructions given
in previous sections.
2. Plug the charger AC power cord into
the AC outlet.
3. Press the ON/OFF switch to turn ON.
4. Start the vehicle and turn on the
vehicle’s headlights. Read the voltage
on the digital display. If you get a
reading between 13.2 volts and 14.6
volts, the alternator is working properly.
If the reading is less than 13.2 volts
or more than 14.6 volts, have the
charging system checked by a qualied
technician.
NOTE: Refer to your vehicle owner’s
manual for appropriate voltage numbers
for your alternator.
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FAN OPERATION
It is normal for the fan to start and stop when
maintaining a fully charged battery. The fan
does not run in Tester Mode. Keep the area
near the charger clear of obstructions, to
allow the fan to operate efciently.
RESTART
If the Charge Mode is changed after
charging has started (by pressing the
RATE SELECTION or BATTERY TYPE
button), the charging process will restart.
12. DISPLAY MESSAGES
DIEHARD – Scrolls twice upon startup.
CONNECT CLAMPS (VOLTAGE LED lit) –
Plugged into the AC outlet without the
clamps connected to a 6 or 12V battery.
WARNING CLAMPS REVERSED (Red
REVERSED LED lit) – Plugged into the
AC outlet and the clamps are connected
backwards to a battery. Scrolls until
condition is corrected.
ANALYZING BATTERY (Yellow/orange
CHARGING LED lit) – Plugged into the
AC outlet, and when rst connected to a 6
or 12V battery correctly.
CHARGING 6V – XX% (Yellow/orange
CHARGING LED lit) – Plugged into the
AC outlet and correctly connected to a
discharged 6V battery.
CHARGING 12V – XX% (Yellow/orange
CHARGING LED lit) – Plugged into the
AC outlet and correctly connected to a
discharged 12V battery.
FULLY CHARGED AUTO MAINTAINING
(Green CHARGED/MAINTAINING LED
solid) – Plugged into the AC outlet and
correctly connected to a fully charged 6 or
12V battery.
CHARGING ABORTED BAD BATTERY
(Yellow/orange CHARGING LED ashing) –
Circumstances that could cause an Abort
situation during charging:
• The battery is severely sulfated or has a
shorted cell and can’t reach a full charge.
• The battery is too large or there is a bank
of batteries and it doesn’t reach full charge
within a set time period.
Circumstances that could cause an Abort
situation during maintaining:
• The battery is severely sulfated or has a
weak cell and will not hold a charge.
• There is a large draw on the battery and
the charger has to supply its maximum
maintain current for a 12 hour period to
keep the battery at full charge.
LIFE DEMANDS DIEHARD – Charging
is complete and clamps have been
disconnected.
ENGINE START READY (BATTERY
TYPE LED lit) – The charger is ready
for engine start.
ENGINE START COOL DOWN XXX
SECONDS REMAINING (BATTERY
TYPE LED lit) – The charger is in a
mandatory 3 minute (180 second) cool
down state.
13. MAINTENANCE AND CARE
A minimal amount of care can keep your
battery charger working properly for years.
• Clean the clamps each time you are
nished charging. Wipe off any battery
uid that may have come in contact with
the clamps to prevent corrosion.
• Occasionally cleaning the case of the
charger with a soft cloth will keep the
nish shiny and help prevent corrosion.
• Coil the input and output cords neatly
when storing the charger. This will help
prevent accidental damage to the cords
and charger.
• Store the charger unplugged from the AC
power outlet in an upright position.
• Store the clamps on the storage areas
provided on the handle. Do not store the
clamps clipped together, on or around
metal, or clipped to the cables.
14. TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE REASON/SOLUTION
The charger will not turn on
when properly connected.
AC outlet is dead.
Poor electrical connection.
Battery is defective.
Check for open fuse or circuit
breaker supplying AC outlet.
Check power cord and extension
cord for loose tting plug.
Have battery checked.
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PROBLEM POSSIBLE CAUSE REASON/SOLUTION
Battery clamps do not
spark when touched
together.
The charger is equipped
with an auto-start feature.
It will not supply current to
the battery clamps until a
battery is properly connected.
The clamps will not spark if
touched together.
No problem; this is a normal
condition.
The battery is connected
and the charger is on, but
is not charging.
The charger is in tester mode,
not charge mode.
Press the RATE SELECTION
button to activate the charge
mode and select a charge rate.
No reading on the digital
display.
Charger is not plugged in.
No power at the receptacle.
Plug the charger into an AC outlet.
Check for open fuse or circuit
breaker supplying AC outlet.
Digital Display reads LOW
when testing the alternator.
The alternator output is 13.2
volts or less.
Have the electrical system
checked by a qualied technician.
Digital Display reads HIGH
when testing the alternator.
The alternator output is 14.6
volts or more.
Have the electrical system
checked by a qualied technician.
Yellow/orange CHARGING
LED is solid and the display
shows ANALYZING
BATTERY.
The charger needs to check
the condition of the battery.
The yellow/orange LED will
be solid when the charger is
checking the condition of the
battery.
Yellow/orange CHARGING
LED is ashing and the
display shows CHARGE
ABORTED BAD BATTERY.
The battery is sulfated.
The battery is too large for
the charger.
Reset the charger by briey
unplugging it.
You need a charger with a higher
amp rate.
The display shows
CONNECT CLAMPS.
The clamps are not making a
good connection.
Check for poor connection at
battery and frame.
Short or no start cycle
when cranking engine.
No power at receptacle.
AC cord and/or extension
cord is loose.
The clamps are not making a
good connection.
Failure to wait 3 minutes
between cranks.
The battery may be severely
discharged.
The battery is drawing more
than the engine start rate.
The charger may be
overheated.
Check for open fuse or circuit
breaker supplying AC outlet.
Check power cord and extension
cord for loose tting plug.
Check for poor connection at
battery and frame.
Wait 3 minutes of rest time
before the next crank.
On a severely discharged
battery, charge for 10 to 15
minutes in the 60A rate, to help
assist in cranking.
Crank time varies with the
amount of current drawn. If
cranking draws more than the
engine start rate, crank time may
be less than 5 seconds.
The thermal protector may have
tripped and needs a little longer
to reset. Make sure the charger
vents are not blocked. Wait and
try again.
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15. BEFORE RETURNING FOR REPAIRS
• When a charging problem arises, make
certain that the battery is capable of
accepting a normal charge. Double check
all connections, the AC outlet for a full
120 volts, the charger clamps for correct
polarity and the quality of the connections
from the cables to the clamps and from
the clamps to the battery system. The
clamps must be clean.
• When an UNKNOWN OPERATING
PROBLEM arises, please read the
complete manual and call the customer
service number for information. This will
usually eliminate the need for return.
If the above solutions do not eliminate the problem,
or for information about troubleshooting or replacement parts,
call toll-free from anywhere in the U.S.A.
1-800-732-7764
7:00 am to 5:00 pm CT, Monday through Friday
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