Schumacher MKC-10P User Manual
Read Rules for
MODEL MKC-10P
10 AMP 12 VOLTS
BATTERY CHARGER
WARNING: Working in the 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 each time
before using your charger, you read this manual and follow the instructions exactly.
Safe Operation
and Instructions
Carefully
GENERAL BATTERY SAFETY
1. Before you use your battery charger, be sure to read all
instructions and cautions printed on:
• Battery Charger
• Battery
2. Use battery charger on LEAD ACID type rechargeable batteries only, such as used in autos, trucks, tractors, airplanes,
vans, RV's, trolling motors, etc. Charger is not intended to
supply power to low-voltage electrical system other than in
an automotive or boat/marine application.
WARNING: Do
cell batteries that are commonly used with home appliances.
These batteries may burst and cause injury to persons and
damage to property.
3. Use only attachments recommended or sold by manufacturer. Use of non-recommended attachments may result in
fire, electric shock, or injury.
4. When disconnecting the battery charger, pull by the plug
not by the cord. Pulling on the cord may cause damage to
cord or plug.
5. Locate battery power cord so it cannot be stepped on, tripped
over, or subjected to damage or stress.
6. Do not operate charger with damaged cord or plug. Have
cord replaced immediately.
7. Do not operate charger if it has received a sharp blow, been
dropped, or otherwise damaged in any way. Take it to a
qualified professional for inspection and repair.
8. Do not disassemble charger. Take it to a qualified professional when service or repair is required. Incorrect reassembly may result in electric shock or fire.
9. To reduce risk of electric shock, unplug charger from outlet
before attempting any maintenance or cleaning.
not use battery charger for charging dry-
10. Do not use an extension cord unless absolutely necessary.
Use of an improper extension cord could result in fire or
electric shock. If an extension cord must be used, make
sure that:
• Pins on plug of extension cord are the same number, size,
and shape as those of plug on charger.
• Extension cord is properly wired and in good electrical
condition.
• Wire size is large enough for AC ampere rating of charger,
as specified below:
Length of cord (feet): 25 50 100 150
AWG size of cord: 18 18 16 14
11. Always charge battery in a well ventilated area.
NEVER operate in a closed-in or restricted area without
adequate ventilation.
WARNING: Risk of explosive gas.
12. Locate charger as far away from battery as DC charger
cables permit.
13. Do not expose charger to rain or snow.
14. NEVER charge a frozen battery. If battery fluid (electrolyte)
is frozen, bring into a warm area to thaw before charging.
15. NEVER allow battery acid to drip on charger when reading
specific gravity or filling battery.
16. NEVER set a battery on top of charger.
17. NEVER place charger directly above battery being charged.
Gases from battery will corrode and damage charger.
18. NEVER touch the battery clips together when the charger
is energized.
19. NEVER crank engine with charger attached to battery.
• IMPORTANT SAFETY INSTRUCTIONS •
• SAVE THESE INSTRUCTIONS •
1
00-99-000344/0503
PERSONAL PRECAUTIONS AND SAFETY
1. WARNING: Wear complete eye protection and clothing pro-
tection, when working with lead-acid batteries.
2. Make sure someone is within range of your voice or close
enough to come to your aid when you work with or near a
lead-acid battery.
3. Have plenty of fresh water and soap nearby for use if battery acid contacts skin, clothing, or eyes. If battery acid
contacts skin or clothing, wash immediately with soap and
water.
4. Avoid touching your eyes while working with a battery. Acid
particles (corrosion) may get into your eyes! If acid enters
your eye, immediately flood eye with running cold water for
at least 10 minutes. Get medical attention immediately.
5. Remove all personal metal items such as rings, bracelets,
necklaces, and watches when working with a lead-acid battery. A lead-acid battery can produce a short-circuit current
high enough to weld a ring (or the like) to metal, causing a
severe burn.
PREPARING TO CHARGE
1. Make sure you have a 12 volt lead-acid battery. Check
owner manual to make sure.
2. Clean battery terminals. Take care to keep corrosion from
coming in contact with your eyes.
3. If required, add distilled water in each cell until battery acid
reaches levels specified by battery manufacturer. This helps
purge excessive gas from cells. Do not overfill. For a battery without cell caps, carefully follow manufacturer's recharging instructions.
4. Study all battery manufacturer's specific precautions, such
as removing or not removing cell caps while charging, and
recommended rates of charge.
5. Be sure area around battery is well ventilated while battery
is being charged. Gas can be forcefully blown away by using a piece of cardboard or other non-metallic material as a
fan.
6. A marine (boat) battery must be removed and charged on
shore. To charge it on board requires equipment specially
designed for marine use.
6. Take care not to drop a metal tool or other metal onto the
battery. Metal may cause sparking or short circuit the battery or another electrical device. Sparking may cause an
explosion.
7. Always operate battery charger in an open well ventilated
area.
8. Battery chargers get hot during operation and must have
proper ventilation. Air needs to flow around entire charger.
9. Do not set battery charger on flammable items like carpeting, upholstery, paper, cardboard etc. Charger may damage leather and melt plastic and rubber.
10. NEVER smoke or allow a spark or flame in the vicinity of
the battery or engine. Batteries generate explosive gases!
11. WARNING: Handling the cord on this product or cords as-
sociated with accessories sold with this product, will expose you to lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive
Wash hands after handling.
harm.
BATTERY SIZE/RATING
MARINE / OR MCA AMP HR
DEEP CYCLE
220-350 24-40 3-5
350-600 40-70 5-9
600-935 70-104 9-13
CCA: COLD CRANKING AMPS RES. CAP.: RESERVE CAPACITY
MCA: MARINE CRANKING AMPS AMP HR: AMPERE HOUR
2
BATTERY CHARGER CONTROLS
FIGURE 3 - CHARGER CONTROLS
MANUAL-AUTOMATIC SWITCH
Charging may be either Manual or Automatic.
MANUAL
When the Manual position is selected the charger will continue
to charge and will not shut off. You must keep a visual check on
the ammeter or the green LED to determine when the battery is
charged. When the ammeter reads around 5 Amps and the green
LED is on the battery is charged.
WARNING: In the Manual position, the charger will continue to
charge even after the battery is fully charged.
WARNING: Overcharging will damage the battery.
AUTOMATIC CHARGING
When the battery reaches the full charge state, charge current
is turned off and the charger switches to the maintainer mode of
operation. This action occurs when the ammeter tapers down to
approximately 5 Amps. In this state the battery voltage is constantly being monitored. When the battery voltage drops to a
predetermined value charge will turn on for a few seconds replacing the small amount of energy that was lost while the charge
current was at 0 Amps.
MANUAL VS AUTOMATIC CHARGING
For your safety, in the AUTOMATIC position this charger will
only turn on when properly connected to a 12 volt battery with a
voltage over .7 volts. In the MANUAL position the charger will
turn on for any condition. If a battery is so depleted of charge
that it's voltage is less than .7 volts, switch to MANUAL until the
ammeter begins to move up scale, than switch back to the desired AUTOMATIC position.
NOTE: Some batteries, especially those with a built in state of
charge indicator and have been deeply discharged, may require
the use of the MANUAL position in order to obtain full charge.
The AUTOMATIC position may be used to maintain the full
charge state.
METER/LED INDICATOR
The meter gives a reading of the AMP draw on the charger.
When a fully discharged battery is connected to the charger, the
meter will read the maximum output rating of the charger. The
charge current will gradually taper down as the battery approaches full charge. As the charge current tapers, the meter
needle will also move down.
When full charged, the meter needle will suddenly drop to 0 and
a green LED will turn on. The 0 is not printed on the meter
scale, the LED is located in its place. As a visual aid, the meter
scale has been divided into 2 zones, CHARGED and CHARG-
ING.
NOTE: As the battery approaches the full charge state the meter
needle and LED will fluctuate back and forth between CHARGING and CHARGED. For the average size automotive battery,
allow 5 to 10 minutes for the battery to stabilize.
NOTE: A buzz or hum is normal when the output cables have
been disconnected and the AC power cord is still connected to
an electrical source (i.e. wall outlet).
These types of noises will also occur when the green light comes
on indicating the battery is "Completely Charged". At this point,
the charger has stopped charging the battery, but still hums or
buzzes until the electrical power is shut off.
D C AMPS
CHARGED CHARGING
24681012
CHARGE COMPLETE
FULLY DISCHARGED BATTERY
Initial charge current to the battery
is typically 10 Amps.
READING METERS
D C AMPS
CHARGED CHARGING
24681012
CHARGE COMPLETE
APPROACHING FULL CHARGE
Charge current to the battery is typically 6 Amps.
3
D C AMPS
CHARGED CHARGING
24681012
CHARGE COMPLETE
FULLY CHARGED BATTERY
Charge current to the battery is 0
Amps and the green LED is on.
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