Instruction Manual

0478 131 9841 B - EN
28
Fault:
Motor not starting
Possible cause:
– Battery charge state too low – 1 LED
flashes green on battery
– Battery too cold/too warm – 1 LED
illuminates red on battery
– Battery fault – 4 LEDs flash red on
battery
– Lawn mower is too warm – 3 LEDs
illuminate red on battery
– Lawn mower fault – 3 LEDs flash red on
battery
– ON button not pressed
– Safety plug is not inserted
– Electrical connection interrupted
between lawn mower and battery
– Motor is overloaded because grass is
too tall or too wet
– Humidity in machine and/or battery
– Mower housing is blocked
– Fuse in safety plug is defective
Remedy:
– Recharge battery (Ö 7.4)
– Warm up battery or allow it to cool down
– Remove and re-insert battery; consult
specialist dealer if necessary (#)
– Allow lawn mower to cool down
– Clean electric contacts in battery
compartment (Ö 12.2); consult
specialist dealer if necessary (#)
– Press ON button (Ö 11.2)
– Insert safety plug (Ö 8.1)
– Insert battery correctly (Ö 7.2); clean
electric contacts in battery
compartment (Ö 12.2)
– Do not switch on motor in high grass,
adapt cutting height (Ö 8.5)
– Remove battery and dry; clean and/or
dry battery compartment (Ö 7.2)
– Clean mower housing (Ö 12.2)
– Replace safety plug (#)
Fault:
Motor stops during operation
Possible cause:
– lawn mower overheated – 3 LEDs
illuminate red on battery
– Electrical fault
– Safety plug incorrectly inserted
– Machine overloaded due to mowing
grass that is too long or too wet
– Lawn mower fault
Remedy:
– Allow lawn mower to cool down
– Remove and re-insert battery (Ö 7.2)
– Insert safety plug (Ö 8.1)
– Adapt cutting height and mowing speed
to mowing conditions (Ö 8.5)
– Repair lawn mower (#)
Fault:
Excessive vibration during operation
Possible cause:
– Blade fastening screw is loose
– Blade is not balanced
Remedy:
– Tighten blade fastening screw (Ö 12.7)
– Re-sharpen (balance) or replace blade
(Ö 12.8)
Fault:
Poor cut, lawn turning yellow
Possible cause:
– Mowing blade is blunt or worn,
– Rate of feed is too high in relation to the
cutting height
Remedy:
– Re-sharpen or replace mowing blade
(Ö 12.8)
– Reduce rate of feed and/or select
correct cutting height (Ö 8.5)
Fault:
Problems switching machine on or
deteriorating motor power.
Possible cause:
– Battery discharged
– Mowing grass that is too long or too wet
– Mower housing is blocked
– Mowing blades are blunt or worn
Remedy:
– Recharge battery (Ö 7.4)
– Adapt cutting height and mowing speed
to mowing conditions (Ö 8.5)
– Clean mower housing (Ö 12.2)
– Re-sharpen or replace mowing blade
(Ö 12.8)
Fault:
Discharge chute blocked
Possible cause:
– Mowing blade is worn
– Mowing grass which is too long or too
wet
Remedy:
– Replace mowing blade (Ö 12.8)
– Adapt cutting height and mowing speed
to mowing conditions (Ö 8.5)
19. Troubleshooting
# If necessary, contact a specialist
dealer; STIHL recommends STIHL
specialist dealers.