45
7 Troubleshooting
If the equipment does not seem to be working properly, the user should
fi
rst try to inspect and adjust it themselves.
* If the user is unable to inspect the equipment themself or if the equipment fails to work properly after being adjusted or after parts
are replaced, contact your local dealer or J. MORITA OFFICE.
Cannot make a
Measurement.
Check cord connections.
Check that all connections are properly secured.
Check probe cord for broken wire.
Touch the contrary electrode to the
fi
le holder to
check probe cord conductivity.
Beep Alarm Sound doesn’t
sound.
The beep alarm sound volume may set to
OFF.
Turn sound on.
(
☞
p. 10)
The chair doesn’t work.
Two or more bars on the meter may be
blinking.
When two or more bars on the meter are
blinking, measurement settings and chair
operation are locked. If the chair doesn’t work
even after measurement is canceled, contact
your local dealer or J. MORITA OFFICE.
Reference numbers will not
change.
Are you currently making a measurement?
Reference numbers cannot be changed while
making a measurement.
Switch may not be working.
In this case, the switch may be defective.
Two or more bars on the meter may be
blinking.
Remove the
fi
le out of the patient’s mouth and
operate it after the meter has turned o
ff
.
The canal length meter is
unstable.
Is the contrary electrode making good
contact with oral mucosa?
Make sure the contrary electrode makes good
contact with the oral mucosa.
Is the
fi
le holder dirty?
Clean the
fi
le holder with ethanol for disinfection
(ethanol 70 vol% to 80 vol%).
The canal length meter does
not move at all or only when
the
fi
le tip is close to the
apical foramen.
Is the canal blocked?
Open the passage all the way through the
apical constriction
fi
rst and then take the
measurement.
Is the apical foramen very large and open?
If the apical foramen is large or wide open
and not completely formed, the canal length
indicator bar will suddenly jump when the
fi
le tip
gets close to the apex.
Is the canal extremely dry?
Moisten the canal with hydrogen peroxide or a
saline solution.
Problem
Response
Check Points
7.1 Items to be Checked before Requesting Repair