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7
Maintenance
7 – 1 Replace the O-ring
If the O-ring has become worn or damaged, the handpiece may become difficult to connect or if the handpiece is
rattling, replace the O-ring�
Remove the O-ring with a pointed tool, and then mount the new O-ring into the groove�
Also replace the O-ring of the protection plug as well�
7 – 2 Periodical maintenance checks
Every 3 months perform periodical maintenance checks, referring to the check sheet below� If any abnormalities are
found, contact an authorized NSK dealer�
Points to Check
Details
Control unit operation
There should be no abnormal mechanical sound�
LCD display is displayed appropriately�
The control panel does not operate abnormally�
Foot control operation
Check the battery level displayed on the control unit LCD display� If battery level is
low, replace the batteries�
Fully depress the speed control pedal and confirm that the motor is rotating at the
set speed�
Depress each button and make sure that function corresponding to each button
can be confirmed� If the foot control does not function properly, perform calibration�
(See “7 – 3 Foot control calibration”)
Remove the foot control battery cover and make sure its O-ring is not damaged or
worn� If damage or wear is seen, contact an authorized NSK dealer for
replacement�
Foot control hanger
Make sure the foot control hanger does not easily come off the foot control�
Coolant solution flow
Coolant solution flows appropriately with no leakage
Motor with motor cord
Operate for 1 minute and make sure there is no abnormal heating, sound, or
vibration�
Make sure the motor LED illuminates normally�
Handpiece
Inspect the handpiece according to its manual�
Additional safety information:
Periodical safety testing shall be performed every two years following IEC 62353 (EN 62353), in accordance with test
procedure OM-DE0938EN� As periodical safety testing is limited exclusively to professional dental installers who have
been trained and qualified under the control of NSK, contact your authorized NSK dealer�
