Schumacher XI75DU User manual

Model
XI75DU
Power Converter
Converts 12V DC battery power to 120V AC household power
OWNERS MANUAL
PLEASE SAVE THIS OWNERS MANUAL AND READ BEFORE EACH USE.
This manual will explain how to use the converter safely and effectively. Please
read and follow these instructions and precautions carefully.

CONTENTS
IMPORTANT SAFETY INSTRUCTIONS................................................................3
PERSONAL SAFETY PRECAUTIONS...................................................................4
BEFORE USING YOUR CONVERTER..................................................................4
CONNECTING CONVERTER CABLES.................................................................6
OPERATING INSTRUCTIONS...............................................................................6
POWER SOURCE..................................................................................................8
HOW POWER CONVERTERS WORK ..................................................................8
LED DISPLAY.........................................................................................................8
TROUBLESHOOTING............................................................................................9
SPECIFICATIONS................................................................................................10
REPLACEMENT PARTS ......................................................................................10
LIMITED WARRANTY ..........................................................................................11

• 3 •
1. IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS.
1.1 SAVE THESE INSTRUCTIONS – This manual will show you how to use your converter
safely and effectively. Please read, understand and follow these instructions and
precautions carefully, as this manual contains important safety and operating instructions.
WARNING: The converter output is 120V AC and can shock or electrocute the
same as any ordinary household AC wall outlet.
WARNING: 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.
1.2 Do not cover or obstruct the converter’s vents.
1.3 Use the converter in a well-ventilated area.
1.4 This converter is not intended for use by children.
1.5 Do not expose the converter to rain or snow.
1.6 Ensure that the converter is located away from normal trafc areas.
1.7 Use only accessories recommended or sold by the manufacturer.
1.8 Do not operate the converter with damaged or undersized wiring.
1.9 Do not operate the converter if it has received a sharp blow, been dropped or
otherwise damaged in any way; take it to a qualied service person.
1.10 Do not disassemble the converter; take it to a qualied service person when service
or repair is required. Incorrect reassembly may result in a risk of re or electric shock.
1.11 Make sure the converter is not close to any potential source of ammable fumes,
gases or clothing.
1.12 Do not place the converter in areas such as battery compartments or engine
compartments where fumes or gases may accumulate.
1.13 Disconnect both AC and DC power from the converter before attempting any cleaning.
1.14 DO NOT operate the converter if you, the converter, the device being operated
or any other surfaces that may come into contact with any power source are wet.
Water and many other liquids can conduct electricity, which may lead to serious
injury or death.
1.15 Do not place the converter in direct sunlight. The ideal air temperature for
operation is between 50° and 80°F.
1.16 Only connect the power converter to a 12 volt accessory outlet or 12 volt battery.
1.17 Do not attempt to connect the converter to any other power source, including an AC
power source.
1.18 Do not modify the AC or USB receptacle in any way.
1.19 Do not try extending or otherwise changing the 12 volt power cord attached to
your converter.

• 4 •
1.20 Incorrect operation of your converter may result in damage and personal injury.
1.21 This device does not include an internal Ground Fault Circuit Interrupter (GFCI).
For GFCI protection, use a Coleman Cable 02822 GFCI outlet.
2. PERSONAL SAFETY PRECAUTIONS
2.1 Restrictions on Use: This converter may not be used in life support devices or
systems. Failure of this converter can reasonably be expected to cause failure of that life
support device or system, or to affect the safety or effectiveness of that device or system.
2.2 Wear complete eye and clothing protection when working near lead-acid batteries.
Always have someone nearby for help.
2.3 Remove all personal metal items from your body, such as rings, bracelets,
necklaces and watches. A lead-acid battery can produce a short circuit current
high enough to weld a ring to metal, causing a severe burn.
2.4 Never smoke or allow a spark or ame in the vicinity of the battery or engine.
3. BEFORE USING YOUR CONVERTER
•This converter is designed to be used with a single battery, up to group 31
(130 Ah or smaller). The recommended source of power is a 12 Volt deep-
cycle battery, due to their high reserve capacity. Automotive batteries are
recommended for only a short period of time of an hour or less.
•Do not use the converter with a product that draws a higher wattage than the
converter can provide, as this may cause damage to the converter and product.
When you turn on a device or a tool that runs on a motor, the device goes through 2 stages:
1. Start Up – Requiring an initial surge of power (commonly known as the
“starting” or “peak” load).
2. Continuous Operation – Power consumption drops (commonly known as the
“continuous load”).
The wattage (WATTS) or amperes (AMPS) can normally be found stamped or
printed on most devices and equipment, or in the user’s manual. Otherwise,
contact the manufacturer to nd out whether the device you want to use is
compatible with a modied sine wave.
To calculate the wattage: Wattage = AMPS x 120 (AC Voltage).
To calculate the starting load: Starting Load = 2 x wattage.
In general, the startup load of the device or power tool determines whether your
converter has the capability to power it.
Always run a test to establish whether the converter will operate a particular
piece of equipment or device. In the event of a power overload, the converter is
designed to automatically shut down.

• 5 •
This safety feature prevents damaging the converter while testing devices and
equipment within the wattage range of the converter.
When using the vehicle’s 12 volt accessory port, this converter is designed to
supply 60 to 70 watts when the vehicle is not running. With the vehicle’s engine
running, it can supply up to 100 watts. To use the full output, you must connect the
converter directly to your battery.
NOTE: The 100 watt limit is to accommodate the fuse ratings for all vehicles.
Some vehicles may allow the full output. If the vehicle fuse blows when you switch
on the device you are trying to use, you have to either use a smaller device or you
must connect the converter directly to the battery.
IMPORTANT: This converter uses a modied sine waveform (diagram A) which
is not quite the same as power company electricity (diagram B). For the following
devices, we strongly recommend that you use caution and check the device’s
manual to make sure it is compatible with modied sine waveform.
1. Switch mode power supplies
2. Linear power supplies
3. Class 2 transformers
4. Line lter capacitors
5. Shaded pole motors
6. Fan motors
7. Microwave ovens
8. Fluorescent and high intensity lamps (with a ballast)
9. Transformer less battery chargers
Using the converter with any of these devices may cause the device to run warmer
or overheat.
Modiedsinewaveform
produced by converter
DiagramA DiagramB
Puresinewaveform
typicalofhomeACoutlet
IMPORTANT: If you are using the power converter to operate a battery charger,
monitor the temperature of the battery charger for about 10 minutes. If the battery
charger becomes abnormally warm, disconnect it from the converter immediately.
NOTE: You can use an extension cord from the converter to the device without
signicantly decreasing the power being generated by the converter. For best operating
results, the extension cord should be no longer than 50 feet.

• 6 •
4. CONNECTING CONVERTER CABLES
The converter and power source must be in the OFF mode.
IMPORTANT: Make sure to connect your converter only to a 12 volt power supply.
CONVERTER CONNECTION:
1. Locate the positive and negative plastic terminals located on the back of the
converter and remove the terminal caps completely.
2. Install the positive (red) cable ring lug onto the positive (red) terminal screw.
Install the negative (black) cable ring lug onto the negative (black) terminal
screw. Tighten each terminal so that the cable cannot come loose.
CONNECTING CONVERTER CABLE TO A VEHICLE (100 watts maximum):
1. Remove the cigarette lighter from its outlet.
2. Push the 12 volt power plug rmly into the outlet.
CONNECTING CONVERTER CABLES TO 12V BATTERY OR 12V POWER SOURCE:
1. Keep hands, hair, clothing and jewelry clear of battery terminals.
2. Wear eye protection and protective clothing.
3. Connect the positive (red) converter terminal cable to the power source
positive (+) or battery terminal. Make sure the connection is secure.
4. Connect the negative (black) converter terminal cable to the power source
negative (-) or battery terminal. Make sure the connection is secure.
5. To disconnect the converter, reverse the above steps.
NOTE: The internal speaker may make a brief “beep” when the converter is being
connected to or disconnected from the 12 volt power source.
CAUTION: Failure to make the correct connections will result in blown fuses and
permanent damage to the converter.
5. OPERATING INSTRUCTIONS
1. Connect the converter (see Connecting Converter Cables section).
2. Make sure the device to be operated is turned OFF.
3. Plug the device into the converter AC outlet.
4. Press and hold the ON/OFF button to turn the converter on. (The internal
speaker will make a brief “beep”. This is normal.) The Wattage out LED will
glow and the digital display will show .
5. Turn the device on. The display will now show the total wattage used by the
device. To change the digital display, press the Display button.
6. To disconnect, reverse the above procedure.

• 7 •
NOTE: If more than one device is to be powered, start one device at a time to avoid a
power surge and overloading the converter. The surge load of each device should not
exceed the converter’s Continuous Operation wattage rate.
IMPORTANT: If there is a short circuit or power surge in the device,  will display
and the alarm will sound. Press the ON/OFF button to turn off the alarm. If the 
displays after several attempts, there is a short circuit or the device requires more
“starting” or “peak” load than the converter is capable of providing.
NOTE: After two  events, the converter will go into a mandatory 10 second cool-
down period before it will turn on again.
IMPORTANT: If you are using the power inverter to operate a battery charger,
monitor the temperature of the battery charger for about 10 minutes. If the battery
charger becomes abnormally warm, disconnect it from the inverter immediately.
NOTE: You can use an extension cord from the inverter to the device without
signicantly decreasing the power being generated by the inverter. For best
operating results, the extension cord should be no longer than 50 feet.
USING THE USB PORT
The USB port provides up to 2A at 5V DC.
1. Plug the device into the USB port.
2. Press and hold the ON/OFF button to turn the converter on. (The internal
speaker will make a brief “beep”. This is normal.)
3. Turn the USB device on.
4. Reverse these steps when nished using the USB port.
USING THE CONVERTER TO OPERATE A TV OR AUDIO DEVICE
The converter is shielded and ltered to minimize signal interference. Despite this,
some interference may occur with your television picture, especially with weak signals.
Below are some suggestions to try and improve reception.
1. Try altering the position of the converter, antenna cables, and television power
cord. Add an extension cord from the converter to the TV, to isolate its power
cord and antenna cables from the 12 volt power source.
2. Try coiling the television power cord and the input cables running from the 12
volt power source to the converter.
3. Afx one or several “Ferrite Data Line Filters” to the television power cord. Ferrite
Data Line Filters can be purchased at most electronic supply stores.
NOTE: You may hear a “buzzing” sound being emitted from inexpensive sound
systems when operated with the converter. This is due to ineffective lters in the
sound system’s power supply. Unfortunately, this problem can only be resolved by
purchasing a sound system with a higher quality power supply or higher quality lter.

• 8 •
6. POWER SOURCE
Your average automobile or marine battery at full charge will provide an ample
power supply to the converter for approximately 3 hours when the engine is off.
The actual length of time the converter will function depends on the age and
condition of the battery and the power demand being placed by the device being
operated with the converter.
If you decide to use the converter while the engine is off, we recommend you turn
OFF the device plugged into the converter and disconnect the converter’s plug
from the 12 volt accessory outlet before starting the engine. To maintain battery
power, start the engine every 2 to 3 hours and let it run for approximately 10
minutes to recharge the battery.
Although it is not necessary to disconnect the converter when turning over the
engine, it may briey cease to operate as the battery voltage decreases. While the
converter draws very low amperage when not in use, it should be unplugged to
avoid battery drain.
7. HOW POWER CONVERTERS WORK
There are two stages involved in converting 12 volt DC (battery) power into 120V AC
(household voltage):
STAGE 1: The power converter uses a DC to DC transformer to increase the 12-volt
DC input voltage from the power source to 145 volt DC.
STAGE 2: The converter then converts the 145 volt DC into 120 volts AC
(household voltage) using advanced MOSFET transistors in a full bridge
conguration. A “modied sine wave” waveform is generated by this conversion.
8. LED DISPLAY
The LED display identies the current status of the converter.
VOLTS IN : The voltage of the vehicle’s battery, Portable Power jump starter
or DC power source.
VOLTS OUT : The voltage supplied to the device through the AC receptacle.
WATTAGE OUT : The power or wattage supplied to the device plugged into
the converter.
An audio alarm will sound when any of the following codes display. To stop the
alarm, press the ON/OFF button:
 – The converter is not functional.
 – The vehicle’s battery voltage is more than 15.5 volts. The converter will
automatically restart after the voltage drops below 15.0 volts.

• 9 •
 – The continuous load demand from the device exceeds the converter’s
wattage output.
 – The converter is overheated and automatically turns off for a period of 1
to 3 minutes to cool. Make sure the inverter is well ventilated. It will automatically
restart after it cools.
 – The vehicle’s battery voltage is less than 10.5 volts.
 – Short circuit, power surge or overload in the device.
9. TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE REASON/SOLUTION
Alarm is on. Display shows . Device has
a short circuit or demands too
much surge power.
Display shows .
12 volt battery is too low.
Display shows voltage in
between 10.5-11.0 volts.
Display shows .
12 volt voltage is too high.
Display shows . Device
demands more than the converter’s
continuous power rating.
Display shows .Converter
is too hot.
Cycle the converter power OFF
and ON. If problem persists, use a
larger converter or a smaller device.
Remove the defective device.
Recharge/replace battery.
12 volt battery is low. Recharge/
replace battery. The converter will
automatically shut off after battery
voltage reaches 10.5-volts.
If in a vehicle, repair/replace the
alternator or charging system. Use
a properly sized and rated 12 volt
battery. If the input voltage returns
to 15 volts or less, the converter
will automatically restart.
Cycle the converter power OFF
and ON. If problem persists, use a
larger converter or a smaller device.
Increase the ventilation to the
converter. Move the converter to
a cooler area. Reduce the power
consumption of the device. The
converter will automatically reset
after cooling.

• 10 •
PROBLEM POSSIBLE CAUSE REASON/SOLUTION
Converter does
not turn on.
Poor contact at terminals
Fuse has blown.
Check for poor connection to
battery or power supply. Make sure
connection points are clean. Rock
clamps back and forth for a better
connection.
A blown fuse is usually caused by
reverse polarity or a short circuit
within the converter. Contact
a qualied service technician
to replace the fuse(s) with the
appropriate replacement(s).
10. SPECIFICATIONS
Maximum continuous output................................................................. 750 Watts
Surge capacity (0.1 second)...............................................................1500 Watts
No load current draw ...................................................................................<0.5A
Input voltage range.................................................................. 10.5V – 15.5V DC
Output voltage range...................................................................... 120V±5% AC
Optimum efciency ........................................................................................85%
11. REPLACEMENT PARTS
12V accessory plug with cables......................................................3899003535Z
Battery cable with clamps (red and black)......................................3899003534Z

• 11 •
12.LIMITED WARRANTY
SCHUMACHER ELECTRIC CORPORATION, 801 E. BUSINESS CENTER DRIVE,
MOUNT PROSPECT, IL 60056-2179, MAKES THIS LIMITED WARRANTY TO THE
ORIGINAL RETAIL PURCHASER OF THIS PRODUCT. THIS LIMITED WARRANTY
IS NOT TRANSFERABLE OR ASSIGNABLE.
Schumacher Electric Corporation (the “Manufacturer”) warrants this converter
for two (2) years from the date of purchase at retail against defective material
or workmanship that may occur under normal use and care. If your unit is not
free from defective material or workmanship, Manufacturer’s obligation under this
warranty is solely to repair or replace your product with a new or reconditioned unit
at the option of the Manufacturer. It is the obligation of the purchaser to forward the
unit, along with proof of purchase and mailing charges prepaid to the Manufacturer
or its authorized representatives in order for repair or replacement to occur.
Manufacturer does not provide any warranty for any accessories used with this
product that are not manufactured by Schumacher Electric Corporation and
approved for use with this product. This Limited Warranty is void if the product is
misused, subjected to careless handling, repaired, or modied by anyone other
than Manufacturer or if this unit is resold through an unauthorized retailer.
Manufacturer makes no other warranties, including, but not limited to, express,
implied or statutory warranties, including without limitation, any implied warranty
of merchantability or implied warranty of tness for a particular purpose. Further,
Manufacturer shall not be liable for any incidental, special or consequential damage
claims incurred by purchasers, users or others associated with this product, including,
but not limited to, lost prots, revenues, anticipated sales, business opportunities,
goodwill, business interruption and any other injury or damage. Any and all such
warranties, other than the limited warranty included herein, are hereby expressly
disclaimed and excluded. 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 specic legal
rights and it is possible you may have other rights which vary from this warranty.
THIS LIMITED WARRANTY IS THE ONLY EXPRESS LIMITED WARRANTY
AND THE MANUFACTURER NEITHER ASSUMES OR AUTHORIZES
ANYONE TO ASSUME OR MAKE ANY OTHER OBLIGATION TOWARDS
THE PRODUCT OTHER THAN THIS WARRANTY.
Schumacher®and the Schumacher logo are registered
trademarks of Schumacher Electric Corporation.