Protection Circuit - NSK Varios 370 Manuel D'utilisation

7-3 Operate Varios 370 / 370 Lux
Tip vibration will begin when the Foot Control is depressed. Also, Output Indicator will light. ( For Varios2 Lux,
Handpiece LED will illuminate. )
7-3-1 Water Supply Volume Adjustment
Turn the Water Adjustment Knob clockwise
gradually to increase the supply volume. ( Fig. 11 )
During the Handpiece operation :
Possible: Power Level and Water Volume adjustment.
7-4 After the Treatment
Release the Foot Control and Power off the Control Unit. Close the dental unit's water valve.
How to drain the inside of the Handpiece
1) Shut off the water main valve.
2) With the Tip and Handpiece attached, turn the Power/Volume Knob to its lowest setting and then continue stepping on
the Foot Control until water stops coming from the Tip.
3) Remove the Tip and Handpiece.
NOTICE • LED of the handpiece will remain 'On' for approx 5 seconds after Foot Control is released.
( Varios2 Lux )

7-5 Protection Circuit

The Varios 370 has an internal Protection Circuit to prevent overheating. If the internal temperature of the Varios 370
becomes hot, such as when the device is used for more than 10 minutes with the power level set higher than G7, the
output of the device will be reduced automatically to G7. The device will continue to operate at this reduced level until
the internal temperature has reduced to below the protection circuit threshold. During this period, the maximum output
setting that can be used is G8 and to increase output from G7 to G8, output must first be reduced to G5 or lower, then
increased to the maximum of G8. Maximum output can be restored by turning the device off for 15 minutes or longer.
NOTICE • During Protection Circuit function, the Control Unit can not increase the Power Level more
than 8.
Increase
12
Decrease
Fig. 11