QB Expert Alpha Controller
180
Diagnostics and Troubleshooting
Fault Possible Cause Probable Solution
Major Consideration
That Led to Solution
To Clear/Reset from
Fault Condition
Tool does not run
remotely
External input
connections
Repair/replace/
reprogram
Physical inspection:
incorrect wiring,
termination,
connections,
devices or
programming of I/O
assignments
Repair/replace/
reprogram external
input and output
connections and
wiring as necessary
based on I/O
drawings
Lost + 24 V DC
Power
Supply
Return for repair
No or low voltage
(<11V) between
Pins A and V
Return for repair
No lights, no
display
No power Restore power
Power off Turn Alpha on
Power on Plug unit in
Plugged in
Check power at
source
AMP board Failure Return for repair
Unit is on, plugged
in, and there is
power at the source
Return for repair
Completed
Rundown - Zero for
Torque and Angle
Readings
Incorrect Audit Step Verify/Adjust
Torque Audit
Step and or Angle
Audit Step set on
undefined step
Set Torque Audit
Step and or Angle
Audit Step on the
actual desired audit
step
Completed
Rundown - No
Torque and Angle
Readings
Threshold Torque
set too high
Verify/Adjust
Tool ran strategy
but no fastening
cycle values appear
on display
Set Threshold
Torque to zero (0)
or a value lower
than final torque
Incomplete
rundown (AC/TM)
Long bolt Verify/Adjust
Low-torque reject.
Snug Torque has
been set to zero
(0)
Set higher amount
on Snug Torque
Incomplete
rundown (TC/AM)
Prevailing Torque Verify/Adjust
Parts changed. Low
angle reject. Parts
not snug
Insert a Self Tap
step prior to audit
step
Consistent high
angle reject (TC/
AM)
Long bolt Verify/Adjust
Snug Torque has
been left at default
value
Set higher amount
on Snug Torque
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