Troubleshooting Of The Product - Husqvarna 340i Workshop Manual

6.2 Troubleshooting of the product

Symptom
The product does not start. No LEDs
come on when you press the
ON/OFF button.
The motor makes sudden movement
when you push the power trigger but
then stops.
The product stops when you apply
workload.
The lights on the user interface flash. Defective connection in the user inter-
The motor speed is irregular.
A warning sign on the user interface
flashes continuously.
A warning sign on the user interface
flashes after the product is started
and then the product stops.
28 - Troubleshooting
Possible cause
Defective battery.
Defective plug between the battery
and the product.
Defective connection in the user inter-
face connector.
Broken user interface.
Cables between the control unit and
the user interface/main switch are
damaged.
Short circuit in the control unit.
Short circuit in the control unit.
Defective connection in the user inter-
face connector.
Defective or loose chain brake sen-
sor.
face connector.
Short circuit in the user interface.
Defective connection in the signal
connector of the main switch.
Damaged or worn main switch.
Temperature is too high.
Temperature of the control unit or the
battery is too low.
The front hand guard is caught in en-
gaged position.
The power trigger is pushed during
start.
Water in the signal connector of the
main switch.
Short circuit in the user interface.
Short circuit in the main switch.
Recommended step
Press the ON/OFF button to do a
check of the battery. A minimum of 1
green LED must come on.
Make sure that the power connectors
between the battery and the product
are not dirty or damaged.
Make sure that the user interface
connector is correctly connected, dry,
not damaged, and that there is no
corrosion.
Replace the user interface.
Repair or replace the cables if they
are damaged.
Replace the control unit.
Replace the control unit.
Make sure that the power connectors
between the battery and the product
are clean and not damaged.
Make sure that the chain brake sen-
sor is correctly installed. Replace the
chain brake sensor if it is damaged.
Make sure that the user interface
connector is correctly connected, dry,
not damaged, and that there is no
corrosion.
Replace the user interface.
Make sure that the user interface
connector is correctly connected, dry,
not damaged, and that there is no
corrosion.
Replace the user interface.
Wait for the product to become cool.
Make sure that the product and the
battery is not colder than -10° C.
Disassemble the front hand guard
and clean all parts.
Do not push the power trigger when
you start the product.
Disassemble and dry the signal con-
nector and then assemble it.
Replace the user interface.
Replace the main switch.
1435 - 001 - 11.06.2020