32
Rev. 09/2022
7.1
Special Tools for Troubleshooting
Special tools have been developed at MOTORTECH which are needed to carry out certain work
safely and conveniently for the maintenance and repair of VariFuel3 gas mixers. The following
tools can be obtained from MOTORTECH:
–
VariFuel Locking Tool for Toothed Pulley
With this tool, you lock the toothed pulley of a VariFuel3 gas mixer to tighten or loosen the
hexagon socket head cap screw with which the toothed pulley is attached to the shaft.
–
VariFuel Tool for Inspection Window
You use the VariFuel Tool for Inspection Window to mount and dismount the inspection
window on the upper part of the VariFuel3 housing.
–
VariFuel Adjustment Tool for Belt Tension
The VariFuel Adjustment Tool for Belt Tension is ideal for adjusting the tension of the drive
belt of a VariFuel3 air/gas mixer.
The tools are supplied with brief operating instructions, which must be taken into account dur-
ing use.
7.2
Possible Faults
Explosion hazard!
If the system is not entirely tight and sealed, the combustible gas mixture
may escape and result in an explosion hazard.
The device's tightness is checked and guaranteed by MOTORTECH after
production.
If the device is opened by the customer for installation or maintenance
purposes, the customer is responsible for restoring the system's leak
tightness.
If the customer cannot guarantee this, the device must not be opened and
must be replaced and returned to MOTORTECH to remedy any failures.
Troubleshooting
Problem
Possible cause
Solution
Movement of the fuel
ring lags.
Belt tension is too low.
Adjust belt tension with the VariFuel
Adjustment Tool for Belt Tension and
adjust the fuel ring (see
Adjust Fuel
Ring
on page 39).
Stepper motor is defective.
Replace the stepper motor. For this
operation, you need special repair
kits from MOTORTECH.
7 Errors