Stihl FSA 90 R Instruction Manual - Page 21

During Operation The green LEDs glow continuously or flash to indicate the state of charge. 80 - 100 % 60 - 80 % 40 - 60 % 20 - 40 % If the red LEDs glow continuously / flash A B C D English 3) Electromagnetic interference or fault. Take the battery out of the power tool and refit it. Switch on the machine - if the LEDs continue to flash, the battery has a malfunction and must be replaced. 4) Electromagnetic interference or fault. Take the battery out of the machine. Use a blunt tool to remove dirt from the contacts in the battery compartment. Refit the battery. Switch on the power tool - if the LEDs still flash, the power tool has a malfunction and must be checked by a servicing dealer - STIHL recommends an authorized STIHL servicing dealer. 3901BA016 KN 3901BA041 KN 0 - 20 % If the LEDs on the battery flash or glow red - see "If the red LEDs glow continuously / flash". A 1 LED glows continuously red: B 4 LEDs flash red C 3 LEDs glow continuously red: D 3 LEDs flash red Battery is too hot1) 2)/cold1) Malfunction in battery 3) Power tool is too hot - allow it to cool down. Malfunction in power tool 4) 1) When charging: Charge process starts automatically after the battery has cooled down / warmed up. 2) During operation: Power tool cuts out - allow battery to cool down; it may be necessary to take the battery out of the power tool for this purpose. FSA 90 R 19