29eca9e9_FAQs___3M_ESPE_South_Africa__Solution
[Problem] The LED showing the operating status in the charger glows red steadily. [Possible Cause] The charge contact pins in the handpiece or the charger base are wet. [Solution] 
Dry the charge contact pins. Be careful not to bend the flexible charge contact pins in the charger.
FAQs - 3M ESPE South Africa
Solution