Victron energy BlueSolar MPPT 75/50 Manual Del Usario página 9

3.4 LED's
Blue LED "bulk": will be on when the battery has been
connected
Switches off when the absorption voltage has been reached.
Blue LED "absorption": will be on when the absorption voltage
has been reached.
Switches off at the end of the absorption period.
Blue LED "float": will be on after the solar charger has
switched to float.
3.5 Cable connection sequence (see figure 1)
First: connect the battery (this will allow the controller to
recognize system voltage).
Second: connect the solar array (when connected with reverse
polarity, the controller will heat up but will not charge the the
battery).
The system is now ready for use.
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