Troubleshooting
Operating Instructions 650-10 - 03.0 - 08/2016150
2402 Error U-axis stepper motor:
• Stepper motor not moving
fr
eely or blocked
• Encoder cable not
connected or defective
• Stepper motor cable not
connected or defective
• Encoder defective
• Stepper motor defective
• Remove the cause of the
stif
f movement or blockage
• Check the encoder cable
and rep
lace, if necessary
• Replace the encoder
If the stepper motor is not
supplied w
ith current:
• Check the stepper motor
cable and
replace,
if necessary
• Replace the stepper motor
2403 Error U-axis stepper motor step
l
osses:
• Stiff mechanical movement
or
blockage
• Remove the cause of the
sti
ff mechanical movement
or blockage
2421 Error U-axis stepper motor:
• Encoder plug (Sub-D,
9-pin) not connected or
def
ective
• Encoder defective
• Check the connection of
the encoder cable and
replace
, if necessary
2422 Information Magnet wheel search
time
out
• Check connection cables
• Check stepper motor for
sti
ff movement
2430 Error U-axis stepper motor not res-
ponding
• Perform a software update
• Replace the control
2452 Error U-axis stepper motor over
cu
rrent
• Replace the stepper motor
2453 Error Excess voltage • Check the mains voltage
2455 Error U-axis stepper motor
overload (I²T):
• Stepper motor not moving
fr
eely or blocked
• Stepper motor defective
• Controller defective
• Remove the blockage or
the cause
of the stiff
movement
• Replace the stepper motor
• Replace the control
2456 Error U-axis stepper motor:
• Stepper motor not moving
fr
eely
• Stepper motor defective
• Controller defective
• Correct the cause of not
moving fr
eely
• Replace the stepper motor
• Replace the control
Code Type Possible causes Remedial action