Abax OBS-243K User manual

Preface
Thank you for purchasing our Pure Sine Wave Inverter.It is a compact and highly portable
power inverter Which has an excellent track record in the field of high frequency inverter. From
the 12V/24V DC outlet in your vehicle or boat, or directly from a dedicated 12V/24V DC
battery,this inverter can efficiently and reliably power a wide variety of house hold AC products,
such as TV, Computers,Air-conditioner etc. Please read this guide before installing or using the
inverter and save it for future reference. Due to our continuous work to upgrade and improve our
products, we may change or revise the contents of this manual instructions or any part of it
without giving any further notice.

1 . Models and Denotations ............................................................................................1
2 . Safety First .................................................................................................................2-3
3 . Products Features and Applications ...........................................................................4
4 . Pure Sine Wave and Modified Sine Wave Inverter ....................................................5
5 . Guidelines ...................................................................................................................6
5.1 Installation Conditions ...............................................................................................6
5.2 Working Principle ......................................................................................................7
5.3 Connection Method ...................................................................................................7-8
5.4 Battery`s Charge ........................................................................................................9
5.5 Inverter`s Working Status ..........................................................................................9-10
6 . The Sketch of Inverter ................................................................................................11 -17
7 . Inverter to Battery Connections Details-Example ......................................................18
8 . Trouble Shooting ........................................................................................................19-23
9 . Specifications ..............................................................................................................24
10 . Warranty ...................................................................................................................25-26

Models and Denotations
1
abax OB
300W, 600W, 1000W,
1500W, 2000W, 3000W
12V, 24V
M: Modified sine wave Inverter
S: Pure sine wave Inverter
Model Name

Safety First
WARNING! Shock hazard. Keep away from children.
1-1. The inverter generate the same potentially lethal AC power as a normal household wall
outlet. Treat it as if you are using any other AC outlet.
1-2. Do not insert foreign objects into the inverter's AC outlet, fan or vent openings.
1-3. Do not expose the inverter to water, rain, snow or spray.
1-4. Do not under any circumstance, connect the inverter to AC power.
WARNING! Heated surface.
1-5. The inverter housing may become uncomfortably warm, reaching 140F(60°C) under extended high
power opeartion.Ensure at least 4 inches (10cm) of air space is maintained on all sides of the
inverter.During operation, keep away from materials that may be affected by high temperature.
2

WARNING! Explosion hazard.
1-6. Do not use the inverter in the presence of flammable flumes or gases, such as in the bilge of a gasoline
powered boat,or near a propane tanks. Do not use the inverter in an enclostireI containing automotive-
type, lead-acid batteries.These batteries, unlike sealed batteries, emit explosive hy-drogen gas which
can be ignited by sparks from electrical connection.
1-7. Do not connect live AC power to the inverter's AC outlets. The inverter will be damaged even if it is
switched OFF.
1-8. Do not expose the inverter to temperatures exceeding 104F (40 °).
CAUTION! Do not use the inverter with the following equipment:
1-9. Small battery operated products such as rechargeable falshlights,some rechargeable shavers, and
nightlights that are plugged directly into an AC receptacle to recharge.
1-10.Certain battery chargers for battery packs used in hand powered tools. These chargers will have
warning labels stating that dangerous voltages are present at the charger's battery terminals.
1-11.Note DC voltage of battery should be smiliar to input DC voltage of power inverter (for example
DC12V of battery should be connected with input voltage 12V of the inverter).
3

Product Features and Applications
Product Features
• Pure sine wave or modified sine wave
• Soft start
• PWM(Pulse Width Modulation)
• Microprocessor based design
• With power ON/OFF switch and LED indicator
• Overload protection / Over voltage protection / Short Circuit protection / Over temperature
protection / Reverse polarity protection (by fuses)
Product Applications Power tools series:
Electric Saw, Drilling Machine, Grinder, Sandblast Machine, Punching Marchine, Weeding
Machine, Air Compressor; Office series: Computer, Printer, LCD Monitor, Scanning Machine
elc. Household Appliance series: Dust Collector, Fan, Lamp or LED, Sewing Marchine gtg,
Kitchen Appliance series: Microwave Oven, Fridge, Freezer, Coffemaker,
4

Pure sine wave and modified sine wave inverters
The inverter come in two types; pure sine wave power type and modified sine wave type. In the
pure sine wave power inverter, the 230V AC output harmonically follows a smooth sine wave
and is almost identical to normal mains electricity. As a result, the pure sine wave output would
be better for most appliances than the modified sine wave output.
A Graphic Comparison of Modified Sine Wave and Pure Sine Wave is shown below:
5
Pure sine wave
-180
-90
0
90
180
Modified sine wave

Guidelines
Installation Conditions
For safe and optimum performance, install the inverter in a location that is:
3-1-1. Dry - Do not expose to water drips or spray.
3-1-2. Cool - Operate only in ambient temperatures between 32F (0°C) and 104F (40°C). Keep
away from heating vents or other heat producing equipment.
3-1-3. Safe - Do not install inverter in a compartment with batteries or flammable liquids, such
as gasoline or explosive vapors.
3-1-4. Wellryulbtark Allow at least 4 inches (10cm) clearance above and on all sides of the unit
for proper cooling.
3-1-5. Clean and free of dust and dirt - This is especially important if the inverter is used in a
dusty working environment. Select a Suitable Location.
6
1

Guidelines
Working Principle
The inverter works in two stages.During the first stage,the DC to DC converter increases the DC
input voltage from the power source(eg.A 12V battery) to 300V DC. In the second stage, the
high voltage DC is converted to the watts you need (AC) using advanced power MOSFET tran-
sistors or IGBT technology in a full bridge configuration. The result is excellent overload
capability and the capacity to operate difficult reactive loads.
Connection Method
3-2-1.Attach the ring type connector marked with redto the positive (+) DC terminal on the
inverter and attach the ring connector marked with black to the negative (-) DC terminal.
CAUTION! A reverse polarity connection (positive to negative) may damage the inverter
(Fuse). Damage caused by a reverse polarity connection would probably invalidate your
warranty
7

WARNING: Sparking may occur when connecting the unit to the battery, make sure no
flammable fumes are present before making any connections.
3-2-2. Tighten the nut on each DC terminal by hand until it is snug. If the power more than
1800W, please use tools to tight up the screw.
3-2-3. When the inverter is not in use , unplug it from the 12V/24V DC outlet to avoid the
battery's discharge.
CAUTION: Before using, the inverter, please provide a ground connection wire.On the
rear panel of the inverter is a terminal fitted with a nut for connecting to the inverter and
to the earth terminal of the AC output socket. Please choose heavy duty, insulated
green/yellow wire. Drive into the ground to a depth of 1-2m or more. In a vehicle, connect
the inverter to the chassis of the vehicle. In a boat, connect to the boat`s grounding system.
8

Battery`s Charge
We advise that please use deep cycle battery. If you hear the low voltage alarm, please stop the
inverter immediately. When the battery is fully charged, the inverter can be used again. If you
use the inverter in a car, then it would be necessary to run the engine of your car after each time
you use the inverter. You can run the engine for 10 minutes or so to recharge the battery.
Inverter's Working Status
3-3-1. When a 12V/24V DC outlet or battery properly connected to the inverter, turn on the
ON/OFF, the green Power indicator will light,and it deliver AC power to the outlets.
3-3-2. Plug the AC appliances you wish to operated into the AC outlet(s) and switch your
appliances on, switch one at a time.
9

NOTICE: When connect to the appliances, remember to turn on the inverter before turn
on the appliance.
3-3-3. If the audible alarm be ignored the inverter may be automatically shut down when the
battery voltage drops to 9.8-10.2V / 19.6-20.4V, in order to prevent damage to the battery from
excessive discharge.
3-3-4. If a defective battery charge system has caused the battery voltage to rise to a dangerously
high level, the inverter automatically shut down.
3-3-5. The cooling fan is designed to operate only when the temperature goes up or when the
loads are applied.
CAUTION! Although the inverter incorporates the protection function against over-
voltage, there would be still the possibility of getting the unit damaged, if the input voltage
exceeds 16V/32V.
10

The Sketch of Inverter
Pure Sine wave Inverter 3000W OBS-243K
Fan Fan
Battery Connecting Lines
11
AC power display
DC voltage display
AC Output
Ground Connection
AC Output
Light Iniıcators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF Switch

The Sketch of Inverter
Pure Sine wave - Modified sine wave Inverter 1000W
OBS-121K –OBS-241K OBM-121K –OBM-241K Fan
Battery Connecting Lines
12
AC Output
Ground Connection
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF
Switch

The Sketch of Inverter
Pure Sine wave Inverter 2000W
OBS-122K –OBS-242K Fan
Battery Connecting Lines
13
AC power display
DC voltage display
AC Output
Ground Connection
AC Output
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF Switch

The Sketch of Inverter
Modified Sine wave Inverter 2000W
OBM-122K –OBM-242K Fan
Battery Connecting Lines
14
AC Output
Ground Connection
AC Output
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF Switch

The Sketch of Inverter
Pure Sine wave - Modified Sine wave Inverter 1500W
OBS-121.5K –OBM-121.5K Fan
Battery Connecting Lines
15
AC Output
Ground Connection
AC Output
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF
Switch

The Sketch of Inverter
Pure Sine wave - Modified Sine wave Inverter 600W
OBS-1206 –OBM-1206 Fan
Battery Connecting Lines
16
AC Output
Ground Connection
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF Switch

The Sketch of Inverter
Pure Sine wave - Modified Sine wave Inverter 300W
OBM-1203 Fan
Battery Connecting Lines
17
AC Output
Ground Connection
Light Indicators
Power(Green)
Fault(Red)
USB DC 5v
ON/OFF
Switch