Interroll Drum motor series i, S, S/A, D
Troubleshooting
104
Version 4.1 (06/2015) en-US
Translation of original instruction manual
Fault Possible cause Remedy
Rotor drive worn or teeth
broken off
Excessive or frequent stops/
starts, very high starting torque
Check whether the load of the application meets the
specifications of the drum motor.
Check oil, maximum number of stops/starts and permissible
starting torque.
Use frequency inverter with start-and-stop ramps (0.5 s or
more).
Toothed sprocket worn or
teeth/bolts broken off
Start-up under overload and/
or impact load or blocking
Check whether the application and load meet the specifications
of the drum motor.
Check whether a blockage is present.
Use frequency inverter with start-and-stop ramps (0.5 s or
more).
Interim gear box and bearing
worn/failed
Poor lubrication or worn gear
box or bearing
Check oil level.
Check service life and tolerances of journals and drives/shafts.
Use frequency inverter with start-and-stop ramps (0.5 s or
more).
Complete or temporary failure
of brake and rectifier
Wrong operating voltage
applied
Ensure that the correct rectifier was installed and that the
correct input voltage (V/ph/Hz) is present.
Wrong connection Never connect the rectifier to the frequency inverter.
Ensure that the brake was connected according to connection
diagram.
Insufficient shielding against
external voltage spikes from
cables and external devices
Ensure that all cables between brake, rectifier and voltage
supply are shielded and grounded according to IEC
recommendations.
Complete or temporary failure
of brake and rectifier
Voltage drop due to cable with
excessive length
Check whether a voltage drop occurs in long cables and
ensure that the cable cross section meets the IEC specifications.
Excessive stops/starts Ensure that the specifications for brake and rectifier meet the
requirements of the application.
Wrong rectifier connected Contact Interroll. We will give you the name of the correct
rectifier for the corresponding brake and application.
Voltage overshoot /
regeneration with connection
of motor star point rectifier
Conveyor belts with incline can lead to an overload of the
motor and cause a regeneration if motor star point voltage is
applied.
Short circuit of brake winding Check continuity of winding and rectifier.
Slow switching of brake and
rectifier
Wrong brake / wrong rectifier
selected or specified
Ensure that the specifications for brake and rectifier meet the
requirements of the application.
Low ambient temperature or
excessive oil viscosity
Ensure that the oil viscosity is suitable for the ambient
temperature. If not, fill in new oil with the correct viscosity.
Install a heater or more powerful motor. In this case, contact
the local Interroll dealer.
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