Interroll Drum motor series i, S, S/A, D
Troubleshooting
Version 4.1 (06/2015) en-US 
Translation of original instruction manual
105
Fault Possible cause Remedy
Encoder (temporarily) not 
working
Incorrect connection or loose/
defective cable connection
Check connection diagrams and determine whether cables are 
defective or connections are loose.
Failure of electronic backfeed 
system
The troubleshooting should be performed only by an 
electrician.
Error or failure of encoder The troubleshooting should be performed only by an 
electrician.
Error at PC or drive The troubleshooting should be performed only by an 
electrician.