Version 08.2017 | Page/ Seite 25
www.dunkermotoren.com
Appendix B
Troubleshooting
TROUBLESHOOTING CHART
Check to see if the problem you are experiencing is listed in the chart below. If the problem cannot be solved with
reference to this chart, contact the customer services department.
Fault
Possible cause
Action
Forcer fails to move and
produces no force.
1. Drive not powered.
2. Forcer phase connections not
made.
3. Forcer over-temperature sensor not
connected.
4. Forcer over-temperature.
1. Apply power to drive.
2. Check forcer phase connections on
drive.
3. Check forcer over-temperature sensor
connections on drive.
4. Allow forcer to cool.
Forcer fails to move but
does produce force.
1. One or more forcer phase
connections not made or made
incorrectly.
2. One or more position sensor
connections not made or made
incorrectly.
3. Forcer/thrust rod mechanically
blocked.
1. Check forcer phase connections on
drive.
2. Check position sensor connections on
drive.
3. Check forcer/thrust rod is free to move.
Forcer moves but is jerky
in motion.
Incorrect pole pitch set up or phase
offset between position sensor and
forcer back emf.
Check drive or controller set up.
Forcer moves in wrong
direction.
One or more position sensor and
forcer phase connections made
incorrectly.
Check position sensor and forcer phase
connections on drive.
