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Trouble shooting - Causes and corrective action.
Cause
Flashing red battery charge indicator
No charging procedure possible
Battery not (correctly) inserted
Battery contacts contaminated
Battery defective
Battery charge indicators do not light up
Mains plug of the battery charger not
(correctly) plugged in
Socket outlet, mains cable or charger
defective
Corrective action
Insert battery correctly into charger
Clean battery contacts; e.g. by inserting and
removing the battery several times; replace bat-
tery if necessary
Replace battery
Plug mains plug (completely) into socket outlet
Check the mains voltage; if necessary, have the
charger checked by an authorized customer ser-
vice center for FEIN power tools.