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Error code
Symbol
3022
3030
3040
3100
3101
3102
3103
3104
3107
3108
3109
3121
3123
3210
3215
338
Meaning
Control: Voltage error 24V (I2T)
Sewing motor: Phase error
Line voltage drop
Control voltage:
Temporary line voltage drop
Power voltage:
Temporary line voltage drop
Voltage sewing motor:
Temporary line voltage drop
Voltage stepper motors:
Temporary line voltage drop
• Pedal not in rest position
• Setpoint device defective
Machine temperature
• Ventilation openings closed
• Ventilation grille dirty
Speed limited due to insufficient
mains voltage
Safety stop active
• Compressed air missing
• Compressed air insufficient
Oil level too low
• Thread broken
• Empty bobbin
Operating Instructions 755 B, 756 B/F - 00.0 - 02/2021
Troubleshooting
Remedial action
• Switch off and on the machine
again
• Check connections
• Replace control
• Test sewing motor phases
(R=2.8 OHM, high impedance
to PE)
• Replace encoder
• Replace sewing motor
• Replace control
Check mains voltage
Check mains voltage
Check mains voltage
Check mains voltage
Check mains voltage
• Do not press the pedal when
starting up the machine
• Replace setpoint device
• Check ventilation openings
• Clean ventilation grille
Check mains voltage
Switch safety stop off
• Turn on compressed air
• Stabilize compressed air
Top off the oil p. 296
Insert thread p. 21
Change bobbin p. 26
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