Stihl RT 4112 SZ - Electronics; Self-Diagnosis When Starting; Ride-On Mower Faults During Operation; Electronics Faults

0478 192 9810 A - EN
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Engaging the gearbox:
Press the gearbox freewheel lever (1)
inwards to the stop.
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 8.12)
● 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 14.18)
● 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.