DURKOPP ADLER 756 A

Troubleshooting
Service Instructions 755 A/756 A - 00.0 - 02/2019 455
2201 Step motor middle knife timeout
reference
• Cable to reference switch
defective
• Reference switch defective
• Replace cable
• Replace reference switch
2202 Step motor middle knife overload
• blocked/sluggish
• defective
• Control defective
• Eliminate seizing/stiff movement
• Check encoder cable and replace,
if necessary
• Replace step motor
2222 Step motor middle knife pulse-
wheel search time out
• Check connection cables motor /
encoder
• Check step motor for stiff
movement
2230 Ste motor middle knife drive not
responding Step motor card
defective
• Perform software update
 p. 431
• Replace step motor card
• Replace control
2252 Step motor middle knife excess
current
• Replace step motor corner knife
support
• Replace control
2253 Step motor middle knife excess
voltage
• Mains voltage too high
• Check mains voltage
2255 Step motor middle knife overload
• blocked/sluggish
• defective
• Control defective
• Eliminate seizing/stiff movement
• Replace step motor
• Replace control
2256 • Step motor middle knife over-
temperature
• Step motor corner knife seized
up/defective
• Control defective
• Eliminate seizing
• Replace step motor corner knife
support
• Replace control
2301 Step motor corner knife timeout
reference
• Cable to reference switch
defective
• Reference switch defective
• Replace cable
• Replace reference switch
2302 Step motor tape feeder overload
• blocked/sluggish
• defective
• Control defective
• Eliminate seizing/stiff movement
• Check encoder cable and replace,
if necessary
• Replace step motor
Error code Symbol Meaning Remedial action