Speed Limit Mechanism; Protective Circuit For Motor; Memory Function; Error Code - NSK ULTIMATE XL Operation Manual

4. Speed limit mechanism

For the use of a small-diameter round bur or
fisher bur at 40,000min -1 (rpm) or more, pressing
the Speed Limit Release Button, which is
13
equipped with the 12 Speed Control Knob, and
turning the Speed Control Knob allows a
12
setting of up to 50,000min -1 (rpm). (Fig.4)
CAUTION
Use of 40,000min (rpm) or more is allowable only when the bur manufacturer or dealer
-1
specifies that the bur's acceptable rotation speed is 40,000 min
use of more than the acceptable rotation speed is made, the bur may be broken.

5. Protective Circuit for Motor

When the motor is operated with a load
exceeding the limit or the handpiece is in an
unrotational condition, the circuit to protect the
motor and unit works to stop the power supply
to the motor, an error code appears on
11 Indicator. (Fig.5)
How to reset the protective circuit
During manual operation, it can be reset by pressing
by Foot Pedal, depress 3 Foot Pedal back to stop, and the protective circuit will be reset.

6. Memory Function

When the Power Switch is turned on, the rotation direction and HAND/FOOT selections made
when the main switch was last turned off are restored. Special attention should be given to the
rotation direction.
Speed Limit Release Button Speed Limit Release Button Speed Limit Release Button
-1 (rpm) or more. If the
Indicator Indicator Indicator
9 Motor Switch again. During operation
8

7. Error Code

When the motor is stopped due to some trouble such as a failure, overload, wire breakage or
misuse, Speed Display displays the error code for checking the status of the unit and
understanding the cause of the trouble easily.
Error cord
E0 Self-check error
Overcurrent detection error
E1
Fig.4 (Hard)
E2 Overvoltage detection error
E3 Motor sensor error
E4 Unit overheat error
E5 PAM circuit error
E6 Rotor lock error
Fig.5
Overvoltage detection error
E8
(Soft)
E9 ITRIP error
EF Foot pedal error
For countermeasures against error displays, see the section on 15.Troubleshooting.
Description Cause
• Abnormal internal memory
• Broken internal memory
• Long-time use at a high load (overcorrect)
• Shorted cord (power line)
• Shorted motor winding
• Shorted cord (power line),damaged circuit
• Broken internal circuit
• Faulty sensor (Hall IC) in the motor
• Disconnected motor cord
• Severed cord (signal line)
• Temperature rise in the unit due to longtime
use at a high load
• Unit placed under high temperature
• Abnormal voltage generated in start / stop
circuit
• Faulty start / stop circuit from PAM(L Slide)
• Open chuck
• Faulty handpiece
• Motor Faulty
• Faulty sensor (Hall IC) in the motor
• Severed cord (signal, power line)
• Long-time use at a high load (overcorrect)
• Shorted cord (power line)
• Shortstop of the motor winding
Faulty motor and circuit
• Faulty Foot Pedal or Shorted Foot Pedal cord
• Broken internal circuit
9