Apical action setting Stop or
OFF.
Change setting if it’s not
expected.
Motor speed
changes
spontaneously.
Apical action setting Slow
Down.
Change setting if it’s not
expected.
Motor alternates
between
forward and
reverse rotation.
Operation mode setting to
REC or ATC.
Change setting if it’s not
expected.
Set beep volume to 1, 2
or 3.
Beep sound an
alarm even
though the
instrument is not
being used.
The motor is set to REV or
R.L mode.
If it is the expected
mode, ignore the alarm.
Canal
measurement is
unstable.
Complex root canal
environment.
Check situation of root
canals.
Cannot make a
measurement.
Measure wire, lip hook or file
clip connecting not properly.
Lack electrical conductivity
between the shank and the
file.
Use a file that has
conductivity.
Unsuitable situation of root
canals.
Check the root canal
environment.