S8020-WS
EN
Troubleshooting
© Atlas Copco Industrial Technique AB - 9839 2054 01
15
Troubleshooting
Troubleshooting
The table below shows the most common troubleshooting procedures. Note that some actions must only
be done by authorized workshops or qualified service technicians.
Problem
Reason
Action
The screwdriver does not run.
The power adapter is not outputting
power.
Turn on the relay inside the screw-
driver to measure the output volt-
age.
Make sure that the DC voltage is:
■
Terminals 5P-5P and 6P-6P:
■
needle 1: "-" potential
■
needle 4: "+" potential.
■
Terminal 3P-3P:
■
needle 1: "+" potential
■
needle 3: "-" potential.
■
If the screwdriver has a 6-pin
output design, needle 3 and
needle 5 should be conductive.
The connection wire plug 3P-3P,
5P-5P or 6P-6P is broken.
Replace the connection wire plug
with a new connection wire or with
a new plug.
The forward/reverse button is not
working properly and no click is
heard when the trigger is pressed.
Replace the trigger.
Possible damage on the electric
braking system of the power
adapter.
Contact our authorized workshops
or qualified service technicians to
perform the repair.
The screwdriver is not rotating nor-
mally or the motor runs intermit-
tently during forward operation.
The power adapter has a protective
circuit and power is only supplied
normally from 3 to 5 seconds after
the current flow begins.
Operate the tool in reverse mode or
rotate the anvil 90 degrees until a
click is heard, then operate the tool
in forward mode.
The bit falls out easily.
The bit does not match the specifi-
cations.
Change the bit to one matching the
specifications.
The bit is not inserted correctly.
Remove the bit and reinsert it
tightly.
The bit wobbles.
The bit is not inserted correctly.
Remove the bit, rotate it 60 or 180
degrees and reinsert it tightly.
The screwdriver does not stop
when the selected torque is
reached.
An excessive torque setting can
strip the screw threads, as a result,
the clutch does not activate.
Lower the torque to a level that
does not cause stripping.
Differences in size between the bit
and the screw slot lengths can
cause slopping.
Change the bit to a suitable one.
Possible damage on the electric
braking system or on the sensor
switch of the power adapter.
Contact our authorized workshops
or qualified service technicians to
perform the repair.
The screwdriver is overloaded.
The handle is overheated or the
revolutions plunge rapidly while fas-
tening.
Change the torque of the screw-
driver to a higher level or reduce
the fastening frequency to prolong
the life span of the screwdriver.
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