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Fault finding diagram - Electronically
MAIN MOTOR
(1)
Machine runs with high revolution, after it's switched on.
Remove connector (CN1) then switch on:
— If normal, change control board.
— If abnormal, change power board.
(2)
Machine runs after you connected the foot controller.
— Change foot controller.
(3)
Machine runs with high revolution after steps on foot controller, then
indicates"overload" in seconds, and the machine stops.
— Change speed sensor board.
(4)
After steps on foot controller machine runs, but indicates "overload" in
seconds and the machine stops.
— Change upper stop sensor board.
(5)
After steps on foot controller, machine does not run but indicates "overload"
Change power board:
— If abnormal, change control board
— If still abnormal, change motor.
(6)
After steps on foot controller, machine does neither run nor does it indicate
"overload".
— Change foot controller.
— If still abnormal, change control board.
(7)
After steps on foot controller, machine runs, but with unstable revolution or
sometimes stops.
Remove speed sensor board, check if disc is broken or not:
— If abnormal, change disc.
— If normal, change speed sensor.
— If still abnormal, change control board.
104 72 49-26
Husqvarna Viking Huskylock 936
39
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