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English
47
Troubleshoting
7-2
Troubles and Actions
When trouble is found, check the following again before contacting your Authorized NSK Dealer. If none of
these is applicable or the trouble is not remedied even after action has been taken, a failure of this product
is suspected.
Troubles
Cause
Actions
The LCD Display does not light.
The power Switch is OFF.
Turn ON the power.
The AC adapter or AC power cord is
not connected correctly.
Check the connection.
Internal Fuse is blown, due to some
reason
Contact your Authorized NSK
Dealer.
The motor does not run.
The tubing, motor cord, AC adapter
or AC power cord is not connected
correctly.
Check the connection.
The air pressure is not given, or not
proper from the dental unit.
Check the air pressure of the dental
unit.
The LCD Display shows an error
code.
Refer to the error code.
(Refer to “7-1 Error Code”)
The rotation speed of the motor
does not rise.
The air pressure of the dental unit
is lower than the “Upper limit of the
air pressure”
Set the Upper limit of the air
pressure below the air pressure of
the dental unit.
(Refer to “3-8 Changing the settings
for various functions”)
Beeps continue to sound when
turning ON the switch.
You are stepping on the foot pedal
when turning on the power switch.
(Safety function)
Do not step the foot pedal, and turn
on the power switch.
The LED does not light.
Reached the end of life expectancy.
Contact your Authorized NSK
Dealer.
The motor heats up abnormally
during rotation.
Coolant air is not given, or not
proper from the dental unit.
Check the air pressure on the side
of the dental unit.
Water leakage
The tubing, motor cord is not
connected correctly.
Check the connection. If it is
happening inside the control unit,
contact your Authorized NSK Dealer.
Settings when the power is
turned ON are different from the
previous ones when turning off
the power.
The power is turned OFF using the
main unit’s power switch.
Previous settings will not be
retained when turning OFF the main
unit’s power switch. Turn OFF using
the control unit’s Power Key.