VOLTCRAFT VC-1506 Notice D'emploi page 107

During the charging process it has been established that the
accumulator has been totally discharged.
In this case you should check if the voltage of the accumulator has
been correctly set for the charging process.
The voltage in one of the cells of a LiPo, LiIon, LiFe accumulator
is too low. This can occur if a multicell accumulator has been
charged previously without a balancer.
The voltage in one of the cells of a LiPo, LiIon, LiFe accumulator
is too high. This can occur if a multicell accumulator has been
charged previously without a balancer.
The balancer cable was connected wrong or does not fit to the pin
assignment of the charger.
Excess temperature detected. Leave the charger and the accu-
mulator to cool down.
The charger has established that there is an internal problem.
Should this message permanently be displayed, it is possible that
the charger is defective; have it checked by a specialist workshop
or qualified technician.
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