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l Before requesting our repair service, troubleshoot ac-
cording to the following table:
Problem
Bit falls off or cannot
be installed
Weak force, cannot
tighten the screw suf-
ficiently
Driver does not rotate. • Check the power supply.
l Use the HIOS torque meter to check the screw tightening
torque.
• Use HP series for electric driver torque setting.
• Use HDP series for measuring screw loosening torque
and retightening torque.
Cause and solution
• Are you using the bit suitable to your
model?
Please check in the usage table.
• Have you installed the bit properly?
Check the description in the opera-
tion manual for installing the bit.
• If any of the above is not the case,
or the problem cannot be solved,
stop operation immediately and con-
tact your distributor for repair.
• Are you using HIOS genuine parts
and specified springs?
• Check the torque value again in the
"Output torque guide" for the driver.
• If any of the above are not the case,
or the problem cannot be solved,
stop operation immediately and con-
tact your distributor for repair.
Refer to the "Pre-operating prepara-
tion" on this paper.
• If the above is not the case, or the
problem cannot be solved, stop
operation immediately and contact
your distributor for repair.
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