Jump Starting a vehicle with a discharged battery
• Be sure the switch on the back of the RESCUE 4000HD/4050HD is in the OFF position
before connecting clamps to a vehicle for jump starting.
• The RESCUE 4000HD/4050HD is equipped with a polarity alarm. If the cables are
connected incorrectly, the alarm will sound. DISCONNECT the cables immediately and
check the polarity of the discharged battery. Reconnect the cables insuring the positive
(red) battery clamp is on the positive battery terminal and the negative (black) clamp is
connected to a vehicle ground away from the battery.
• If the voltage reading is below 5V, OR if there is no reading at all on the volt meter,
DISCONNECT THE BATTERY CABLES. DO NOT ATTEMPT TO START.
Connect the positive (red) battery clamp to the
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positive terminal of the discharged battery.
Connect the negative (black) battery clamp to
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a suitable vehicle ground such as an alternator
bracket—away from the vehicle battery.
The voltmeter on the front of the RESCUE
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4000HD/4050HD will automatically read the
voltage of the discharged battery.
If the voltage is above 5V, turn the switch on the
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back of the RESCUE 4000HD/4050HD to the on
position.
The unit is ready to jump start the disabled
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vehicle.
When the vehicle starts, turn Rescue
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4000HD/4050HD off remove the black and
then the red battery clamps and store them
in the provided pockets on the RESCUE
4000HD/4050HD.
Recharge after use.
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Using the air compressor
(Model 4050HD)
The model 4050HD is supplied with an air
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hose with an integrated inflator and pressure
gauge. A rocker switch on the back panel
turns the compressor on and off.
The compressor has a 40% duty cycle.
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Recharge your portable power pack
Periodically check the internal battery voltage and recharge the unit when the voltage
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drops below 12.5V. Keeping the battery fully charged will insure that your RESCUE
4000HD/4050HD is ready when you need it.
The built-in float charger will maintain your battery at full charge. You can safely plug the
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RESCUE 4000/4050HD into a 120V AC outlet whenever it is not in use to maintain a full
battery charge.
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WARNING – Risk of explosion or fire
2.