7 Errors
Rev. 09/2022
33
Problem
Possible cause
Solution
Fuel ring does not
move.
Fuel ring is dirty.
Disassemble and clean the VariFuel3
and replace all wearing parts. For
this operation, you need special
repair kits from MOTORTECH.
Impact from master control
Check the master control.
Shaft has loosened from
the stepper motor.
Tighten the shaft with the set screw
(see
Fix Shaft
on page 34). Upon
completion, check if the system is
properly sealed!
Stepper motor is defective.
Replace the stepper motor. For this
operation, you need special repair
kits from MOTORTECH.
Stepper motor driver is in
error mode.
Confirm all error messages.
Stepper motor driver is
incorrectly configured.
Configure your VariStep3 stepper
motor driver via the MICT. After-
wards, if necessary, adjust the fuel
ring (see
Adjust Fuel Ring
on
Stepper motor driver is
unsuitable.
Use a compatible stepper motor
driver.
Wiring of stepper motor
and/or stepper motor driver
is defective.
Check the wiring and make sure that
the supply voltage is available.
The toothed pulley has
detached itself from the
shaft of the stepper motor.
Fix the toothed pulley with the Vari-
Fuel Locking Tool for Toothed Pulley
and adjust the fuel ring (see
Adjust
Fuel Ring
Belt tension is too high.
Adjust belt tension with the VariFuel
Adjustment Tool for Belt Tension and
adjust the fuel ring (see
Adjust Fuel
Ring
on page 39).
Traverse range of the
fuel ring corresponds to
the size of one opening
in the fuel ring. Howev-
er, the position of the
traverse range is wrong.
Incorrect adjustment of the
fuel ring.
See
Adjust Fuel Ring
on page 39
