92c57dad_smål__FAQ_s____3M_ESPE_Danmark__Solution
[Problem] The power level display of the handpiece flashes red. The ongoing exposure is interrupted (light off signal is emitted) followed by a 2-second error signal; the and piece switches to 'sleep' mode and resists further activation. [Possible Cause] The battery lacks sufficient charge. [Solution] 
Place the handpiece in the charger and recharge the battery.
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Solution