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Error code
Symbol
1002
1004
1005
1006
1007
1008
1010
1011
1012
1051
1052
1053
332
Meaning
Sewing motor insulation fault
Sewing motor error: Incorrect
direction of rotation
• Sewing motor blocked
• Encoder cable not connected
• Encoder cable defective
• Encoder defective
• Sewing motor error: Maximum
speed exceeded
• Sewing motor cable defective
• Sewing motor defective
Error in the reference run
Fault in sewing motor encoder
• Cable to sewing motor refer-
ence switch defective
• Reference switch defective
Sewing motor synchronization
error (encoder Z pulse missing)
Sewing motor synchronization
error
Sewing motor timeout
• Cable to sewing motor refer-
ence switch defective
• Machine head not moving
freely
• excessively high toothed belt
tension
Sewing motor excess current,
internal current increase to over
25 A
Mains voltage too high
Operating Instructions 755 B, 756 B/F - 00.0 - 02/2021
Troubleshooting
Remedial action
• Check motor phase and PE for
low-impedance connection
• Replace sewing motor encoder
• Replace sewing motor
• Replace encoder
• Check plug assignment and
change, if necessary
• Check wiring in machine distribu-
tor and change it, if necessary
• Test motor phases and check for
correct value
• Remove blockage
• Check encoder cable and replace,
if necessary
• Replace sewing motor
• Switch off and on the machine
again
• Check class
• Replace encoder
• Replace sewing motor
• Replace encoder
• Check for stiff movement
Replace encoder
• Replace cable
• Replace reference switch
(part number 9815 935006)
Switch off the control, use hand-
wheel to turn, and switch on the
control again.
If error is not corrected, check
encoder
Replace synchronizer
• Replace cable
• Replace reference switch
• Eliminate seizing
• Check toothed belt tension
• Replace sewing motor cable
• Replace encoder
• Replace sewing motor
• Replace control
Check mains voltage
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