User manual

111
Version 2.4 (10/2011) en
Original instructions
Drum Motor
Troubleshooting
Drum Motor / belt runs slower than
specified
Lagging slipping on drum shell Check lagging condition and adhesion
of lagging to shell.
Replace lagging. Shot blast or roughen
the shell surface to ensure good lagging
adhesion.
60 Hz motor installed in 50 Hz supply Check motor specification and
tolerances against supply voltage /
frequency.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Drum Motor runs faster than
specified
Incorrect motor speed ordered /
supplied
Check Drum Motor specification and
tolerances.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Incorrect frequency converter
settings
Check if frequency converter settings
meet Drum Motor's specifications and
revise.
50 Hz motor installed in 60 Hz supply Check if motor specification and
tolerances meet supply voltage /
frequency.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Rubber lagging thickness has
increased the belt speed over the
nominal speed of the motor
Measure the thickness of rubber lagging
and check if this was included and
calculated when choosing the Drum
Motor speed.
Reduce the lagging thickness or install
frequency converter or replace with
Drum Motor having lower speed.
Motor winding - one phase failed Winding isolation failure / overload Check continuity, current and resistance
on each phase winding.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Motor winding - two phases failed Power supply failure on one phase
causing overload on the other two
phases / isolation failure
Check the supply to all phases. Check
continuity, current and resistance on
each phase winding.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Motor winding - all three phases
failed
Motor overloaded / wrong supply
connected
Check correct supply voltage.
Check continuity, current and resistance
on each phase winding.
Replace Drum Motor or contact your
local Interroll distributor for further help
and advice.
Symptom Possible cause Help