SC Series Controllers
Troubleshooting
Problem
Possible
Cause
Tool does not run
Fault
STOP
condition or
input
Tool does not run
External input
remotely
connections
Lost + 24 V
DC Power
Supply
No lights, no display
No power
AMP board
Failure
Completed Rundown
Incorrect Audit
- Zero for Torque and
Step
Angle Readings
Completed
Threshold
Torque set too
Rundown - No
high
Torque and Angle
Readings
Incomplete rundown
Long bolt
(AC/TM)
Incomplete rundown
Prevailing
(TC/AM)
Torque
Consistent high angle
Long bolt
reject (TC/ AM)
126 / 1032
Probable Solution Major Consideration
That Led to Solution
Torque Target set to zero
(0) on torque control
strategy
Angle Target set to zero
(0) on angle control
strategy
Tool Speed set to zero
(0)
Power set to zero (0)
Acceleration set to zero
(0)
Various errors
Fault displayed on
screen
Remove STOP
Press and hold trigger
condition
and view message on
display
Repair/replace/
Physical inspection:
reprogram
incorrect wiring,
termination, connections,
devices or programming
of I/O assignments
Return for repair
No or low voltage (<11V)
between Pins A and V
Restore power
Power off
Power on
Plugged in
Return for repair
Unit is on, plugged in,
and there is power at the
source
Verify/Adjust
Torque Audit Step and or
Angle Audit Step set on
undefined step
Verify/Adjust
Tool ran strategy but no
fastening cycle values
appear on display
Verify/Adjust
Low-torque reject.
Snug Torque has been
set to zero (0)
Verify/Adjust
Parts changed. Low
angle reject. Parts not
snug
Verify/Adjust
Snug Torque has been
left at default value
To Clear/Reset from
Fault Condition
Set higher amount on
Torque Target
Set higher amount on
Angle Target
Set higher amount on
Tool Speed
Set higher amount on
Power
Set higher amount on
Acceleration
See Fault Guide (See
Chapter Fault Guide
[} 118])
See Message Guide (See
Chapter Safety [} 10])
Repair/replace/
reprogram external input
and output connections
and wiring as necessary
based on I/O drawings
Return for repair
Turn Alpha on
Plug unit in
Check power at
Return for repair
Set Torque Audit
Step and or Angle
Audit Step on the actual
desired audit step
Set Threshold Torque to
zero (0) or a value lower
than final torque
Set higher amount on
Snug Torque
Insert a Self Tap step
prior to audit step
Set higher amount on
Snug Torque
