Interroll Drum motor series i, S, S/A, D
Troubleshooting
100
Version 4.1 (06/2015) en-US
Translation of original instruction manual
Fault
Possible cause
Remedy
Drum motor runs faster than
specified.
Wrong motor speed ordered/
delivered
Check drum motor specifications and tolerances.
Replace drum motor or contact local Interroll dealer.
Wrong settings at frequency
inverter
Check whether the frequency inverter settings meet the
specifications of the drum motor and change them if necessary.
Use of a 50-Hz motor in a 60-
Hz supply system
Check whether motor specifications and tolerances correspond
to the supply voltage/frequency.
Replace drum motor or contact local Interroll dealer.
Thickness of rubber coating
increased the belt speed
beyond the rated speed of the
motor
Measure thickness of rubber coating and check whether this
value was considered and calculated in the selection of the
drum motor speed.
Reduce thickness of rubber coating or install a frequency
inverter or install new drum motor with lower speed.
Motor winding: one phase
failed
Failure/overload of winding
insulation
Check continuity, current and resistance of phase winding.
Replace drum motor or contact local Interroll dealer.
Motor winding: two phases
failed
Power failure at one phase
which leads to overload at the
other two phases / separating
failure
Check power supply to all phases. Check continuity, current
and resistance of phase winding.
Replace drum motor or contact local Interroll dealer.
Motor winding: all three
phases failed
Motor overload / wrong
current connection
Check whether the correct supply voltage is present.
Check continuity, current and resistance of phase winding.
Replace drum motor or contact local Interroll dealer.
