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DEFRNLITESPT         EN
0478 193 9905 C - EN
● Attach the grass catcher box. (Ö 12.10)
In order to ensure safe operation, the ride-
on mower is equipped with electronics 
which check all the safety devices before 
each starting procedure and when the 
mower is running.
9.1 Self-diagnosis when starting
Before the engine is started, the 
electronics perform self-diagnosis. This 
checks switches, wiring, etc. for correct 
functioning.
Activating self-diagnosis:
● Sit on the driver's seat.
● Release the parking brake. (Ö 8.10)
● Turn the ignition key to the "ignition on" 
position (Ö 8.1) – do not press any 
switches or actuate any pedals.
Self-diagnosis without faults:
A short beep sounds – the electronics are 
activated and the ride-on mower is ready 
to start.
● Start the engine. (Ö 12.2)
Self-diagnosis with faults:
A continuous beep or three successive 
beeps sound.
A continuous beep signals a fault in the 
electronics or a battery connected with the 
incorrect polarity.
● Turn the ignition key to the "engine off" 
position. (Ö 8.1)
● Check the polarity of the battery 
connections and connect the wiring 
correctly if necessary. (Ö 14.19)
● Repeat self-diagnosis.
If the continuous beep continues to 
sound even after the battery is correctly 
connected, an electronic fault is 
present. Consult your specialist dealer; 
STIHL recommends STIHL specialist 
dealers.
Three successive beeps signal a fault in 
the electrics (short circuit) or in the seat 
switch. It is not possible to start the engine.
● Turn the ignition key to the "engine off" 
position. (Ö 8.1)
● Have a detailed diagnosis carried out 
by a specialist dealer. STIHL 
recommends STIHL specialist dealers.
9.2 Ride-on mower faults during 
operation
The electronics monitor the safe condition 
during operation. Three successive beeps 
sound if there is a fault in the electrics 
(short circuit, loose connectors, broken 
wire).
The engine is stopped.
Behaviour:
● Turn the ignition key to the "engine off" 
position. (Ö 8.1)
● Activate self-diagnosis. (Ö 9.1)
9.3 Electronics faults
In rare cases, electronics faults may occur 
during operation of the mower. A 
continuous beep sounds and the engine is 
stopped.
Behaviour:
● Turn the ignition key to the "engine off" 
position. (Ö 8.1)
● Activate self-diagnosis. (Ö 9.1)
● Restart the engine. (Ö 12.2)
9. Electronics
If the fault cannot be rectified, 
detailed diagnosis is necessary. 
Consult your specialist dealer; 
STIHL recommends STIHL 
specialist dealers.
If the fault cannot be rectified, 
detailed diagnosis is necessary. 
Consult your specialist dealer; 
STIHL recommends STIHL 
specialist dealers.
10. Notes on working with 
the machine
Warning:
Risk of injury.
Before each use, observe all 
information regarding safe 
operation of the machine. 
Working on slopes requires special 
concentration and care.
Note
Check the mowing deck for correct 
installation position before starting 
work.
Select a flat, even area for initial 
use of your machine and mow in 
straight and slightly overlapping 
strips for practising purposes. 
Grass should always be mowed 
when dry.