DURKOPP ADLER 756 A

Troubleshooting
458 Service Instructions 755 A/756 A - 00.0 - 02/2019
3030 Sewing motor: Phase error • Test sewing motor phases
(R=2.8 OHM, high impedance
to PE)
• Replace encoder
• Replace sewing motor
• Replace control
3040 Mains voltage drop Check mains voltage
3100 Control voltage:
Temporary mains voltage
interruption
Check mains voltage
3101 Power voltage:
Temporary mains voltage
interruption
Check mains voltage
3102 Voltage sewing motor:
Temporary mains voltage
interruption
Check mains voltage
3103 Voltage step motors:
Temporary mains voltage
interruption
Check mains voltage
3104 • Pedal not in rest position
• Setpoint device defective
• Do not press the pedal when
starting up the machine
• Replace setpoint device
3107 Machine temperature
• Ventilation openings closed
• Ventilation grille dirty
• Check ventilation openings
• Clean ventilation grille
3108 Speed limited due to insufficient
mains voltage
Check mains voltage
3109 Safety stop active Switch the Safe stop off
3121 • Compressed air missing
• Compressed air insufficient
• Turn on compressed air
• Stabilize compressed air
3123 Oil level too low Top off the oil  p. 440
3210 • Thread broken Insert thread
3220 • Empty bobbin Change bobbin
3500 • Error Command Interpreter
• Motor synchronization Internal
error
• Switch off and on the machine
again
• Perform software update
 p. 431
• Feedback to Dürkopp Adler
Service
Error code Symbol Meaning Remedial action