Schauer CM12A User manual

1
User Manual
12 Volt Battery Charger
1/4/6 Amp & 1/8/12 Amp
Plus Battery maintainer and Rejuvenator
Model No. CM6A (0757-14CEC) / CM12A (0757-15CEC)
THIS MANUAL CONTAINS IMPORTANT SAFETY AND
OPERATING INSTRUCTIONS
READ ENTIRE INSTRUCTION BEFORE USE

2
WARNING - RISK OF EXPLOSIVE GASES WORKING IN VICINITY OF A LEAD-ACID BATTERY IS
DANGEROUS. EXPLOSIVE GASES DEVELOP DURING NORMAL BATTERY OPERATION. IT IS
IMPORTANT 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 marking on
these products and on engine.
Do not expose charger to rain, snow, or liquids.
Use of an attachment not recommended or sold by the battery charger manufacturer may result in a risk of
fire, electric shock, or injury to persons.
To reduce risk of electric shock, unplug charger from AC outlet before attempting any maintenance or
cleaning.
To reduce risk of damage to electric plug and cord, pull by plug rather than cord when disconnecting charge
An extension cord should not be used unless absolutely necessary. Use of improper extension cord could
result in a risk of fire and electric shock. If 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 and that the extension
cord is properly wired and in good electrical condition and that the wire size is large enough for A.C.
ampere rating of charger as specified in the following table:
RECOMMENDED MINIMUM AWG SIZE FOR
EXTENSION CORDS FOR BATTERY CHARGERS
Length of cord (feet): 25 50 100 150
AWG size of cord: 16 16 16 14
If charger is equipped with an input power cord, do not operate charger with damaged cord or plug -
replace the cord or plug immediately.
Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in any way;
take it to a qualified serviceman.
Do not disassemble charger; take it to a qualified service center when service or repair is required.
Incorrect reassembly may result in a risk of electric shock or fire.
Appliances incorporating batteries which contain materials hazardous to the environment.
Batteries contain lead and dilute sulfuric acid. Dispose of the battery in accordance with federal, state and
local regulations. Do not dispose of the battery in a landfill, lake or other
Scrap and replace the VRLA battery at or before the time indicated on the battery or in the user's manual.
Usage beyond the required time of service can cause fluid leakage due to damages to the container, or
cause fire due to power leakage.
PERSONAL PRECAUTIONS
The appliance is not intended for use by young children or infirm persons without supervision; young
children should be supervised to ensure that they do not play with the appliance.
When the battery charger is charging for automobile batteries, the following steps should be done:
The battery terminal is not connected to the chassis has to be connected first. The other connection is to
be made to the chassis, remote from the battery and fuel line. The battery charger is then to be connected
to the supply mains.
After charging, disconnect the battery charger from supply mains, and then remove the chassis connection
and the battery connection, in this order.
For appliance with type Y attachment:
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or similarly
qualified person in order to avoid a hazard.
Someone should be within range of your voice or close enough to come to your aid when you work near a
lead-acid battery. Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing or
eyes. Wear complete eye and clothing protection. Avoid touching eyes while working near battery.
If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye,
immediately flush eye with running cold water for at least 10 minutes and get medical attention immediately.
NEVER smoke or allow a spark or flame in vicinity of battery or engine.

3
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.
When working with a lead-acid battery, remove personal metal items such as rings, bracelets, necklaces,
watches, etc. 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.
It is not intended to supply power to a low voltage electrical system other than in a power supply
application. Do not use battery charger for recharging dry-cell or non-rechargeable batteries that are
commonly used with home appliances. These batteries may burst and cause injury to persons and damage
to property. While charge the impropriety type of battery will cause battery serious damage.
NEVER charge a frozen battery.
NEVER charge the impropriety type of battery.
NEVER charge the impropriety Voltage of battery.
NEVER block off the ventilation louver of the chrger.
PREPARING TO CHARGE
If necessary to remove battery from vehicle to charge, always remove grounded terminal from battery first.
Make sure all accessories in the vehicle are off, so as not to cause an arc. 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.
Clean battery terminals. Be careful to keep corrosion from coming into contact with eyes. Add distilled
water in each cell until battery acid reaches level specified by battery manufacturer. This helps purge
excessive gas from cells. Do not overfill. For a battery without caps, carefully follow manufacturer's
recharging instructions.
Study all battery manufacturers’ specific precautions such as removing or not removing cell caps while
charging and recommended rates of charge.
Determine voltage of battery by contacting battery manufacturer and make sure it matches output rating of
battery charger.
CHARGER LOCATION
Locate charger as far away from battery as dc cables permit.
Never place charger directly above battery being charged; gases from battery will corrode and damage
charger.
Never allow battery acid to drip on charger when reading gravity or filling battery.
Do not operate charger in a closed-in area or restrict ventilation in any way.
Do not set a battery on top of charger.
DC CONNECTION PRECAUTIONS
Connect and disconnect DC output terminals only after removing charger from AC outlet.
Never allow DC output terminals to touch each other.
If problems arise connecting the output leads, solicit the aid of your Dealer from whom you purchased this
product or the charger manufacturer for finding a suitable connection device for your application.
FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN VEHICLE. A SPARK NEAR BATTERY
MAY CAUSE BATTERY EXPLOSION. TO REDUCE RISK OF A SPARK NEAR BATTERY:
Position AC and DC cords to reduce risk of damage by hood, door or moving engine part.
Stay clear of fan blades, belts, pulleys, and any other parts that can cause injury to persons.
Check polarity of battery posts POSITIVE (POS., P, +) post usually has larger diameter than NEGATIVE -
(NEG., N, -).
Determine which post of battery is grounded (connected) to chassis.
For negative-grounded vehicle, first connect POSITIVE (RED) clip from charger to POSITIVE (POS., P, +)
ungrounded post of battery. Then connect NEGATIVE (BLACK) terminal to vehicle chassis or engine block
away from battery.
For positive-grounded vehicle, connect NEGATIVE (BLACK) clip from charger to NEGATIVE (NEG., N, -)
ungrounded post of battery. Connect POSITIVE (RED) clip to vehicle chassis or engine block away from
battery keeping the battery terminal well removed there from.
Do not connect any charger clips to carburetor, fuel lines, or sheet-metal body parts. Connect to a heavy

4
gauge metal part of the frame or engine block.
Connect charger AC supply cord to electric outlet.
When disconnecting charger, turn switches (if supplied) to off, disconnect charger from AC power, remove
clip from vehicle chassis, and then remove clip from battery terminal. See operating instructions for length
of charge information.
FOLLOW THESE STEPS WHEN BATTERY IS OUTSIDE VEHICLE. A SPARK NEAR THE BATTERY
MAY CAUSE BATTERY EXPLOSION. TO REDUCE RISK OF A SPARK NEAR BATTERY:
Check polarity of battery posts. POSITIVE (POS., P, +) battery post usually has a larger diameter than
NEGATIVE (NEG., N, -) post. Some batteries are equipped with 'Wing-Nut' terminals allowing for easy
placement of the terminals to these posts.
Attach at least a 24-inch long 18-gauge (AWG) insulated battery cable to NEGATIVE (NEG., N, -) battery
post.
Connect POSITIVE (RED) charger terminal to POSITIVE (POS., P, +) post of battery.
Position yourself and free end of cable as far away from battery as possible - then connect NEGATIVE
(BLACK) terminal to free end of cable.
Do not face battery when making final connection.
Connect charger AC supply cord to electrical outlet
When disconnecting charger, always do so in reverse sequence of connecting procedure and break first
connection while as far away from battery as practical
A marine (boat) battery must be removed and charged on shore. To charge it on board requires equipment
specially designed for marine use.
MAINFEATURES: Smart Charge plus Maintenance and Rejuvenation
Easy to Use: Easy to operate and requires no technical experience.
Fully controlled by Microprocessor
Battery initial condition diagnose
Enhanced battery rejuvenation (patented technology)
Battery voltage retention analysis
Peak pulses for long term maintenance
Ultra lower power consumption ( ECO mode)
Multi Charge Stages:
oQualification - Battery condition check
oBattery rejuvenation
oSoft Start
oBulk Charging
oAbsorption Charging
oEqualizing Charging
oVoltage analysis
oFloat Mode
oLong term maintenance pulse charge
Diagnosis & Charge - Automatic diagnosis and charge: On power up, the charger
will automatically diagnoses the battery condition, and then determine if the battery
charger engages the rejuvenation stage or goes into charging cycle.
Enhanced battery rejuvenation stage –Patented battery rejuvenation technology:
The charger has a unique and patented rejuvenation feature which uses with high
voltage equalizing and peak pulse reconditioning to repair the sulphated batteries,

5
this feature is fully automatic and subjected to the internal impedance of the battery.
Charge & Maintain - Automatic Maintenance: The battery charger could be left
unattended and it is full time managed by program; when the battery is charged to
"full" state, the charger automatically switches to maintain the battery. It will monitor
the battery voltage and continue to peak performance with special pulse charge in
long term maintenance.
Short circuit or Reverse polarity protection: The charger will automatically turn off
when the output short circuit or reverse polarity occurred and prevent any damage.
Never overcharge your battery
Heavy-Duty cables
Corrosion-resistant output connectors
Output clips and ring terminals provided: It comes with a quick connect fly lead and
2 different kinds of connectors, crocodile clips and a ring terminals. The ring
terminals are perfect for permanent connection to your battery. You can connect the
lead to the battery and tuck the lead away while you are using your vehicle and when
you get back to your garage simply plug the lead back into the charger.
TEMPERATURE & SAFETY PROTECTION:
The charger contains the following safety protections:
INTERNAL OVERHEAT PROTECTION: The battery charger is built-in with overheat
and overload electronic circuit. When the charger is overheated, the charger will
decrease the charging current. If temperature is decreased, the charger will resume
to normal charging.
TIMER PROTECTION: The charger provides the maximum charging timer
management for each charging stage; this condition may occur if attempting to
charge any severely discharged or heavily sulfated battery. Once the charger is
timed-out, the charger will stop charging for protecting your battery and the RED
LED will be FLASH fast, while this situation occurs, please check with your battery
statues.
REVERSE POLARITY: The charger has reverse battery protection. If a reverse
battery exists (Red LED ON, while output leads are connected backwards), simply
unplug charger from AC power and properly remake the connections as described
in this manual.
SHORT CIRCUIT PROTECTION: The charger has output short-circuit protection. If
the charger output lead short condition exists (Red LED ON, while output leads are
connected backwards), simply unplug charger from AC power and properly remake
the connections as described in this manual. The charger employs the firm
hardware and smart program to automatically detect the output connections. Once
the charger detects the output short-circuit or reverse polarity, it will not deliver any
output current.
ECO MODE FOR ENERGY SAVING:
This battery charger has built in ultra-low power consumption circuit and operated with very
high power efficiency, the charger will automatically go into ECO mode if load unattached.

6
During ECO mode, the power drawn is less than 0.7W, equal to power consumption of
0.02kWh per day; after the battery is fully charged and during long term maintenance stage,
the total power consumption is around 0.06kWh per day.
RAPID CHARGE / SILENT CHARGE(NIGHT MODE) AND MAINTENANCE:
Rapid charge mode: Uses the rated maximum charging current to ensure the fastest
charging time, the fan of the unit will turn on to ensure the maximum charging current.
Silent charge mode (Night mode): Charges at a slightly reduced charge rate for some
quiet application such as used on Caravan at night, the cooling fan of the unit is not
required.
Maintenance mode: Ideal and recommended for long term battery maintenance.
Rapid charge mode: Uses the rated maximum
charging current to ensure the fastest charging time,
the fan of the unit will turn on to ensure the maximum
charging current.
Silent charge mode (Night mode): Charges at a
slightly reduced charge rate for some quiet application
such as used on Caravan at night, the cooling fan of the
unit is not required.
Maintenance mode: Ideal and recommended for long
term battery maintenance.
Note: Image shows 12A model
BATTERY TYPES & CAPACITY:
Suits all Lead Acid Type Batteries. (GEL, WET, AGM, Calcium)
Adjustable charge rate: 12V volt battery
CHARGE RATE
BATTERY SIZE (12V)
Deep cycle (AH)
Automotive (CCA)
Marine (MCA)
Time (Hours)
2Amp
14-40
80-240
110-330
7-24
4Amp
30-80
180-480
250-650
7-24
6Amp
40-120
240-720
330-1000
7-24
8Amp
60-160
360-1000
500-1300
7-24
12Amp
80-240
480-1440
660-2000
7-24
Some batteries may be able to handle a higher Charge Current; Check with the battery
Manufacturer when charging batteries with small capacity.
ELECTRICAL PARTS:
Delivered with:
A.C Power Cord:
o6 feet with UL 2pin Plug
Output Lead:
o4 feet with Trailer Connector
Extension Cord:

7
o2 feet with Trailer Connector + Battery Clamp or
o2 feet with Trailer Connector + Ring Connector
ENVIRONMENTAL CHARACTERISTICS:
Operating Temperature: -10 to 40° C
Storage Temperature: -25 to 85°C
Operating Humidity Range: 90% RH Max
Cooling: Fan or natural cooling depends on charge mode selection
TECHNICAL SPECIFICATIONS:
CHARGING INSTRUCTIONS:
STEP 1 - Pre Charge Check & Electrolyte Level Check
Check the Battery Electrolyte level (Not required on sealed & Maintenance Free
Batteries).
If necessary, remove the vent caps and add distilled water so the levels are halfway
between the upper and lower fill lines.
Check the Voltage Output Switch on the charger and make sure it’s on the correct
voltage
Model Number
CM6A (0757-14)
CM12A (0757-15)
Type
Smart
Smart
Input Voltage Range
100-120Vac
100-120Vac
Input Frequency
50/60Hz
50/60Hz
Output
1/ 4/ 6A @ 12V
1/ 8/ 12A @ 12V
Start Voltage
2V
2V
Charge Voltage
GEL-14.1V
GEL - 14.1V
AGM&WET - 14.4V
AGM&WET - 14.4V
Calcium - 14.7V
Calcium - 14.7V
Equalizing Voltage
GEL - 14.3V
GEL - 14.3V
AGM&WET - 14.6V
AGM&WET - 14.6V
Calcium - 15.5V
Calcium - 15.5V
Float voltage
13.6V
13.6V
Size (L*W*H)
7.44”L x 3.86”W x 2”H
8.54”Lx4.06”Wx2.28”H
Weight
1.65 lbs.
2.43 lbs.
Approvals
UL/cUL, FCC, CEC
UL/cUL, FCC, CEC

8
STEP 2 - Connecting the Battery charger to your Battery
If the Battery is out of the vehicle:
oConnect the Red lead from the charger to the positive (+) battery terminal.
oConnect the Black lead from the charger to the negative (-) battery terminal.
If Battery is still in the vehicle, determine if the vehicle is positively or negatively
earthed.
oIf Negatively Earthed (Most Common) –FIRST Connect the Red (+) battery
charger lead to the positive (+) Battery post and then connect the Black (-)
battery charger lead to the vehicle’s chassis and away from the fuel line.
oIf Positively Earthed –FIRST Connect the Black (-) battery charger lead to the
Negative (-) battery post and then connect the Red (+) battery charger lead to
the Vehicle’s chassis and far away from the fuel line.
STEP 3 - Connect the battery charger to Mains Power
Connect the battery charger to the Mains Powered socket.
The Charger will automatically start when AC power is connected and switched on.
(Note: If the Fault Indicator LED illuminates Red, please check your connections as it’s
likely that the Positive and Negative Leads are reversed. Refer to Trouble Shooting
Page for further information)
THE CHARGING PROCESS:
The charging stages and performance are as follows:
ECO Mode
If ac power is connected, and the battery is not connected, after 10 seconds, the charger will
automatically go into ECO mode.
The Green LED is fast flashing indicates the ECO mode.
Battery Initial Qualification
When the battery is connected and ac powers on, the program will automatically run
qualification as the following processes:
- Detects the battery internal impedance and initial voltage.
- Determine the charging rate acceptance.
- Diagnoses the battery sulphated condition.
- Senses whether the battery is still connected into the vehicle electronic circuit.
The program will determine the next stage subjected to above result of initial qualification.
The Red LED is ON and Yellow LED is ON, (the initial voltage is at very low level).
Enhanced Battery Rejuvenation
If the initial qualification detected that the battery was in poor condition, our unique rejuvenation
process (patented in USA and Europe) will begin automatically. During the rejuvenation

9
process, a high voltage equalizing and peak pulse reconditioning charge is used to repair the
sulphated battery, this unique patented feature will break down and dissolve the lead-sulphate
crystal built up on the battery plates, balance out the high concentrations of acid, which is to
extend your battery life and performance.
If the battery voltage does not reach 9V within 24 hours, the Rejuvenation process will be timed
out.
The Blue LED is flashing indicates the Rejuvenation stage.
If the program detects the battery can be normally accepted charging current, it will directly go
into Soft start stage; if the battery still can not accept the charging current after 24 hours
rejuvenation, it expresses the Battery Rejuvenation fails and the battery is not healthy.
The Red LED will be ON to indicate the battery rejuvenation failure.
Smart Charging Mode
There are following stages:
oSoft start Charging Mode (C.C. Mode)
Blue Charging LED is flashing.
Gently ramps up the battery voltage to 11V, if the battery voltage doesn’t
reach 11V within 6 hours, the charger will engage a safety timer protection
and RED faulty LED will start flash.
oBulk Charging Mode (C.C. Mode)
Blue Charging LED is ON.
The battery can be charged about 80%.
The charger delivers an almost constant current of the maximum output until
the battery voltage reaches the preset voltage value within 24 hours, if the
battery voltage doesn’t reach preset voltage value within 24 hours, the
charger will engage a safety timer protection and RED faulty LED will start
flash.
oAbsorption Mode (C.V Mode)
Green absorption charging LED is ON.
The battery can charge up to almost 100%.
The charging current tapers and the charging voltage are kept constant at the
preset value without overcharging.
oEqualization charging
Blue Bulk LED and Green Equalization LED both flashing.
A well proven process that carefully equalize the battery to store it’s full
capacity, the Equalization stage for Calcium battery selection is automatic.
The equalization stage for AGM & WET and GEL battery only occurs if the in
Initial start voltage is below 11 Volts.
oAnalysis Mode ( Battery retention test Mode)
The charging is interrupted for a short period for battery voltage measured
If the battery voltage falls too quickly, the battery is probably faulty.

10
The Yellow Charging LED is ON (if above situation occurred)
oFloat Mode (Safe voltage level of 13.6V)
Full Green LED is ON.
The Float Mode allows the charger to effectively be left connected to your
batteries; it works at a safe level of 13.6V, and ready for use.
oMaintenance mode (Special pulse for long term maintenance)
Full Green LED is ON.
The program engages a special charging waveform and monitors the battery
voltage variety, if the battery voltage sinks, the special pulses will keep the
battery in optimal state, if the battery voltage drops even lower, the battery
charger will switch into Bulk charging stage. The maintenance mode allows
the charger can be connected to the battery over the course of a season; if
possible; check the electrolyte liquid level in the battery.
STEP 4 - Disconnecting the Battery charger from Battery
If the Battery is out of the vehicle.
oSwitch OFF and Remove the AC Power Plug from the outlet.
oRemove the Black lead and then the Red lead.
oCheck electrolyte levels if possible.
(As they may need topping up with distilled water after charging)
If the Battery is in the vehicle.
oSwitch OFF and Remove the AC Power Plug from the outlet.
oRemove the lead from the vehicle chassis.
oRemove the lead from the battery.
oCheck electrolyte levels if possible.
(As they may need topping up with distilled water after charging)
LED STATUS INIDICATOR TABLE:

11
LED
Status
Descriptions
1. Presstoselectthechargerate
2. Green ON
Maintenancechargemodeisselected
3. Green ON
Silentchargemodeisselected
4. Green ON
Rapidchargemodeisselected
LED
Status
Descriptions
5. FaultLED–Red
RED ON
Shortcircuit/Reversepolarityor RejuvenationfailedifBulkLEDalso
flashingfast
RED Flashing
Overtemperatureprotectionmode/ SoftstartchargingtimedoutifBlue
bulkLEDalsoflashingfast/BulkchargingLEDtimedoutifBlueBulkLED
alsoON
LED
Status
Descriptions
6. Blue Flash/ON
FastFlash–Rejuvenation/SlowFlash–Softstartcharging
ON–Bulkcharging
7. Green Flash/ON
FlashingindicatesEqualizationchargeorONindicatesAbsorption
charging
8. Green Flash/ON
FlashingifAnalysisfailedorONiffullycharged–Float/ Maintenance
mode
LED
Status
Descriptions
9. Green ON
Calciumbatterytype isselected
10. Green ON
AGMorWETbatterytypeisselected
11. Green ON
GELbatterytypeisselected
12. PresstoselecttheBatterytype
QUALIFICATION
Checks
battery
condition to
determine
whether the
rejuvenation
stage or
charge
cycle is
required.
REJUVENATION
Automatic
stage for
batteries in
poor
condition.
Breaks
down
sulphation
using new
patented
technology.
SOFT START
Increases
your battery
life by gently
starting to
charge the
battery until
the battery
reaches a
set voltage.
BULK CHARGE
Reduces
charging
time by
delivering
maximum
charge until
the battery
reaches a
set voltage.
ABSORPTION
Uses
constant
voltage and
ensures the
battery
receives a
full charge
without
overchargin
g the
battery.
EQUALISATION
Restores full
capacity to
batteries by
removing
acid
stratification.
ANALYSIS
Checks the
battery
condition to
ensure it is
fully
charged.
FLOAT
Maintains
the battery
at 100%
charge.
MAINTENANCE
Special
pulse
charge for
long-term
maintenanc
e to ensure
the battery
is in optimal
condition.

12
TROUBLE SHOOTING
Types of
Problems
Indication
Possible Causes
Suggested Solution
Charger
does not
work?
No
Indicator
lights on
- No AC power
- Check AC connections
and make
sure Power Point is
switched ON
Charger has
no DC
output?
Fault RED
LED is ON.
- Output is short circuited
- Reverse polarity connection
to Battery
- Check DC connection
between charger and
battery and make sure
they are not short
circuiting.
- Check that the crocodile
clips haven’t fallen off
the battery.
- Check that the crocodile
clips / ring terminals are
connected to the correct
polarity.
No Charging
Current?
Fault RED
LED is
Flashing
- Battery is severely sulphated
- Battery has a damaged cell
- Overheat protection mode
- Check the Battery
condition, age etc.
- Battery may need
replacement.
- Move battery & Charger
to cooler environment
Full / Float
light won’t
come on?
Fault RED
LED is
Flashing
Or Full
LED is
Flashing
- Battery capacity too large for
the battery charge and it has
timed out.
- Battery is defective
- Battery is severely sulphated
- Check the charger
specification matches
the battery capacity.
- Battery cannot be
charged and must be
replaced.
- Charge rate selected
might be too low, switch
charger off and on and try
a higher charge rate
setting providing it
doesn’t exceed the
maximum charge limit for
your battery.
MAINTENANCE
The charger is maintenance free. If the power cord is damaged, the charger must be left to
the reseller for maintenance. The case should be cleaned occasionally. The charger should
be disconnected from the power while cleaning.
702-000464-01-R