Troubleshooting - NOCO Genius BOOST MAX GB251+ User Manual & Warranty

Troubleshooting

Error
Error LED: Solid Red
Error LED: Blinking Red
w/Cables Connected Properly
Single (1) Flash
Double (2) Flash
Quadruple (4) Flash
Quintuple (5) Flash
Sextuple (6) Flash
Hot LED: Solid
Hot LED: Flashing
Hot LED: Flashes
Then All LEDs Off
Cold LED: Solid
Cold LED: Flashing
Cold LED: Flashes
Then All LEDs Off
Boost Light Does Not Come On
w/Cables Connected Properly
Reason/Solution
Reverse polarity / Reverse the battery connections.
Short circuit detected at the clamps. / Have battery checked by a professional.
Short circuit detected on battery clamps. / Remove all loads, reconnect clamps to battery.
High voltage detected at clamps (the GB251 is connected to a voltage system greater than 24V).
Charge timeout error (i.e. the GB251 has been in bulk charge for too long)
XGC OUT over current (i.e. more than 15amps is being drawn from the XGC OUT port)
BMS (Battery Management System) Fault. (Power GB251 "off" and "on" again to clear. If problem
persists contact Customer Support)
Unit is fully operational, but approaching upper temperature limit. / Allow the unit to cool.
Unit is too hot to jump start, only the flashlight is available in this state. / Allow the unit to cool.
Unit is too hot to jump start or use other functions. / Allow the unit to cool, and bring the unit into
cooler environment.
Unit is fully operational, but approaching lower temperature limit. / Allow the unit to warm up.
Unit is too cold to jump start, only the flashlight is available in this state / Allow the unit to warm up.
Unit is too cold to jump start or use other functions. / Allow the unit to warm up, and bring the unit
into warmer environment.
Connected battery is below 3-volts / Remove all loads, and try again, or use manual override
mode.