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8 Troubleshooting of the electrical system
8.1 Troubleshooting diagram for the electrical system
Product will not start
Check the battery
Can the product be started
– green light?
Check the fuse
Check the cables
Check the safety switch
Check the breaker
Check the electric motor
8.2 To do troubleshooting of the main
switch
For products with S/N up to: 20180900383
The main switch in battery products from Husqvarna
energizes the control unit and the motor. It is also used
as a position sensor for the speed control. Examine
these functions with an ohmmeter.
If all indications are in specified limits, then the switch is
approved.
CAUTION: Do not push the main switch more
than 6 mm and not to its end position.
•
Measure between B+ and B1 when the switch is not
compressed. The result must be open circuit..
456 - 002 - 03.10.2018
Is the keypad showing a
fault signal?
•
Measure between B+ and B1 when the switch is
compressed. The result must be closed circuit.
•
Measure between pin 2 and pin 5 when the switch is
not compressed. The result must be closed circuit.
•
Measure between pin 2 and pin 5 when the switch is
compressed. The result must be 50kΩ ± 25%.
•
Measure between B1 and Pin 1. The result must be
closed circuit.
Let the machine cool
down for at least 60 mins.
Change the control unit if
the fault persists.
Replace the part
Replace the control unit
Troubleshooting of the electrical
system - 33
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Troubleshooting
