Husqvarna K 535i Workshop Manual page 21

Symptom
Keypad lights flash.
The motor speed changes.
A warning sign on keypad flashes
continuously.
A warning sign on the keypad flashes
after start. The product then stops.
A warning sign on the keypad flashes
after start. The green LED is on but
the product does not operate.
Product operates but there is no indi-
cation light on the keypad.
The product starts immediately when
the battery is attached.
A warning sign on keypad shows a
red light.
Product shows red light after instal-
ling a new control unit.
744 - 002 -
Possible causes
Defective connection in keypad con-
nector.
Short circuit in keypad.
Defective connection in main switch
signal connector.
Damaged or worn main switch.
Temperature too high.
Temperature of control unit or battery
too low.
Power trigger is pushed during start.
Water in main switch signal connec-
tor.
Short circuit in keypad.
Short circuit in main switch.
The signal between battery and prod-
uct is defective.
Defective connection in keypad con-
nector.
Broken keypad.
Short circuit in keypad.
A permanent error prevents operation
of the product.
Broken control unit.
Spare part comes without software.
Recommended step
Make sure that the keypad connector
is correctly assembled, dry, not dam-
aged and that there is no corrosion.
Replace keypad.
Make sure that the keypad connector
is correctly assembled, dry, not dam-
aged and that there is no corrosion.
Replace keypad.
Wait for the product to become cool
(max. 5 min.).
Make sure that the product and the
battery is not colder than -10° C.
Do not push the power trigger when
you start the product.
Disassemble and dry the stop signal
connector and then assemble it.
Replace the keypad.
Replace the main switch.
Make sure that the power connectors
between the battery and the product
are not dirty or damaged.
Make sure that the small cables be-
tween connector and the control unit
are not loose or damaged.
Do a check of the keypad function in
battery diagnostic tool. Make sure
that the keypad connector is correctly
assembled, dry, not damaged and
that there is no corrosion.
Replace the keypad.
Replace the keypad.
Erase error codes in diagnostic tool.
Replace control unit.
Use diagnostic tool to install software.
Troubleshooting - 21