Symptom Possible cause Recommended step
A warning sign on the user interface
flashes after start.
Defective signal between the battery
and the product.
Make sure that the power connectors
between the battery and the product
are clean and not damaged.
Make sure that the small cables be-
tween the connector and the control
unit are not loose or damaged.
A red triangle lights up on the user in-
terface when the product starts but
the front hand guard is not engaged.
Defective or loose chain brake sen-
sor.
Make sure that the chain brake sen-
sor is correctly installed. Replace the
chain brake sensor if it is damaged.
Defective cables between the user in-
terface and the chain brake sensor.
Make sure that the cables and con-
nections between the user interface
and the chain brake sensor are not
damaged. Replace damaged cables.
The product works but there is no in-
dication light on the user interface.
Defective connection in the user inter-
face connector.
Do a check of the user interface func-
tion with the common service tool.
Make sure that the user interface
connector is correctly connected, dry,
not damaged, and that there is no
corrosion.
Defective user interface. Replace the user interface.
The product starts immediately when
you install the battery.
Short circuit in the user interface. Replace the user interface.
A warning sign on user interface
shows a red light.
Permanent error codes that prevent
the operation of the product.
Erase the error codes in the common
service tool.
Defective control unit. Replace the control unit.
The product shows red light after a
new control unit is installed.
The control unit comes without soft-
ware.
Use the common service tool to in-
stall the software.
1430 - 001 - 05.05.2020 Troubleshooting - 23
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