User manual

108
Version 2.4 (10/2011) en
Original instructions
Drum Motor
Troubleshooting
Error search
Symptom Possible cause Help
Motor does not start or stops during
operation
No power supply Check power supply.
Incorrect connection or loose /
broken cable connection
Check connection according to diagram.
Check for broken cables / loose
connections.
Overheating of the motor See symptom "Motor gets hot during
normal operation".
Motor overloaded Disconnect main power supply and
identify and remedy reason for overload.
Internal thermal control tripped /
failure
Check for overload / overheating. When
cool, check continuity of internal thermal
control. See symptom "Motor gets hot
during normal operation".
External overload protection tripped /
failure
Check for overload / overheating. Check
continuity and function of external
overload protection.
Motor winding phase failure Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Motor winding short circuit
(insulation failure)
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Brake does not release Check if brake operates at start up.
Check connections and continuity of
brake winding.
If connections and brake winding are
OK, check the rectifier.
Back stop rotation incorrect (non-
reversible-bearing)
Turn the power off immediately, rotate
the drum by hand to determine if the
fault is electrical or mechanical. Check
the connection for correct rotation and,
if necessary, change the phase
connection so that the drum rotates in
the right direction or, if possible, re-
install the Drum Motor so that it
operates in the opposite direction.
Drum or conveyor belt is blocked Make sure the belt and the Drum Motor
are free from obstruction and that all
rollers and drums rotate freely.
If the Drum Motor cannot rotate freely, it
might be a seize-up of transmission or
bearing. In this case, contact your local
Interroll distributor for advice.