Interroll Drum motor series i, S, S/A, D
Troubleshooting
98
Version 4.1 (06/2015) en-US
Translation of original instruction manual
Fault
Possible cause
Remedy
Motor heats up in regular
operation
Overload of the drum motor
Check rated current for overload.
Ensure that the motor is not rubbing against the conveyor belt
frame.
Ambient temperature above
40 °C
Check ambient temperature. If the ambient temperature is too
high, install a cooling unit. Contact local Interroll dealer.
Excessive or frequent stops/
starts
Check whether the number of stops/starts corresponds to the
specifications of the drum motor and reduce this number if
necessary. Install a frequency inverter to optimize the motor
output.
Do not use motors of the S-series for start-stop operation.
For motors of the i-series, the start-and-stop ramps may not be
less than 0.5 seconds. Ramps can be set with a frequency
inverter. For shorter ramps, a motor of the D-series must be
used.
Contact local Interroll dealer.
Belt tension too high
Check belt tension and reduce as necessary.
Motor is not suitable for the
application
Check whether the application meets the specifications of the
drum motor.
Use special reduced-power motors for the operation with link
belts or without belts.
Coating too thick
Replace coating or contact local Interroll dealer.
Wrong voltage supply
Check the voltage supply.
For single-phase motors, ensure that the correct starting or run
capacitors are used.
For 3-phase motors, ensure that no phase has failed.
Wrong settings at frequency
inverter
Check whether the frequency inverter settings meet the
specifications of the drum motor and change them if necessary.
Loud noise of drum motor in
regular operation
Wrong settings at frequency
inverter
Check whether the frequency inverter settings meet the
specifications of the drum motor and change them if necessary.
Loose motor mount
Check motor mount, shaft tolerances and fasteners.
Belt tension too high
Check belt tension and reduce as necessary.
Wrong/incorrect profile
between drum shell and belt
Ensure that belt and drum profile match and are correctly
connected. Replace as needed.
Observe installation guidelines of the belt manufacturer.
Drum motor incorrectly
mounted
Check the mounting location of the serial number (
See
"Positioning the drum motor", page 76
An outer conductor failed
Check connection, check supply system.
