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How to Jump Start using NOCO GB250+ / GB251+
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GB251+
HOW TO JUMP START.
ATTACH CLAMPS.
POWER ON.
START VEHICLE.
Within 60 seconds.
Power off.
Or power off/on to reset.
GB251+
LEDs
Power LED
Illuminates White when unit is "on".
Cold LED
Illuminates solid Blue; unit is fully operational, but approaching lower temperature limit. Flashing Blue; unit is too cold to jump start, only flashlight is available in this state.
Hot LED
Illuminates solid Red; unit is fully operational, but approaching upper temperature limit. Flashing Red; unit is too hot to jump start, only flashlight is available in this state.
Error LED
Illuminates Red if reverse polarity is detected, or blinks “on” and “off” in various sequences (from 1 to 6 blinks) to convey error conditions.
Charge LEDs
Indicates the charge level of the internal battery.
Boost LED
Illuminates White when Boost is active. LED flashes White when Manual Overide feature is active.
GB251+
Buttons
Power Button
Push to turn unit “on” & “off” or restart boost after 60-second timeout.
Manual Override
To enable, push and hold for three (3) seconds. WARNING: Disables safety protection and manually forces Boost "On". Only for use when a battery is too low to be detected.
Light Mode
Toggles the ultra-bright LED light through 7 light modes: 100% > 50% > 10% > SOS > Blink > Strobe > Off
60 Second Timer
Power LED will illuminate orange after the 60-second timeout countdown. Remove the clamps from the Car Battery or power the unit 'off' and back 'on' again to jump start.
Voltmeter
The built-in voltmeter reads the voltage of the vehicle’s battery for enhanced diagnostics and troubleshooting. It will display the 60-second timeout countdown.
GB251+
Troubleshooting
Error
Reason/Solution
Error LED: Solid Red
Reverse polarity / Reverse the battery connections.
Error LED: Blinking Red w/Cables Connected Properly
Short circuit detected at the clamps. / Have battery checked by a professional.
Single (1) Flash
Short circuit detected on battery clamps. / Remove all loads, reconnect clamps to battery.
Double (2) Flash
High voltage detected at clamps (the GB251 is connected to a voltage system greater than 24V).
Quadruple (4) Flash
Charge timeout error (i.e. the GB251 has been in bulk charge for too long)
Quintuple (5) Flash
XGC OUT over current (i.e. more than 15amps is being drawn from the XGC OUT port)
Sextuple (6) Flash
BMS (Battery Management System) Fault. (Power GB251 "off" and "on" again to clear. If problem persists contact Customer Support)
GB251+
COMPATIBLE ACCESSORIES.
The following accessories are compatible with the selected product.
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