NSK NLZ User manual

English
Contents
1
1. Introduction ..................................................2
1-1 Outline.......................................................................2
1-2 User and Indication for Use .........................................2
1-3 Precautions for handling and operation........................3
1-4 Classification of Equipment .........................................6
2. Components .................................................7
2-1 List of components.....................................................7
2-2 Part Names of Control Unit and Main Unit ....................8
3. Preparations for Use ...................................12
3-1 Installing the Main Unit and the Control Unit ...............12
3-2 Connecting the Tubing ..............................................13
3-3 Connecting the Motor Cord .......................................14
3-4 Connecting the AC Adapter .......................................14
3-5 Connecting the AC Power Cord..................................15
3-6 Connecting / disconnecting the motor........................15
and motor cord
3-7 Connecting / disconnecting the motor........................16
and the handpiece (option)
3-8 Changing the settings for various functions................17
3-9 Check before treatment ............................................21
4. Operation Procedure ................................... 22
4-1 General Application Mode .........................................23
4-2 Rotary Endo Mode (NLZ E only) .................................24
4-3 Reciprocating Endo Mode (NLZ E only).......................27
4-4 Contra-Check Function .............................................28
4-5 Sound Volume..........................................................33
(When the load exceeds the set torque limit value,
Error etc.)
4-6 Last Memory Function ..............................................34
4-7 Initializing Program...................................................34
(Restoring the Factory Setting)
4-8 Overheat Prevention .................................................36
5. Post-use Maintenance ................................38
5-1 Cleaning at point-of use (Motor) ................................38
5-2 Cleaning, Disinfecting (Motor)....................................40
5-3 Packaging, Sterilizing,...............................................41
Drying and Storage (Motor)
5-4 Cleaning, Disinfecting ...............................................42
(Control unit, motor cord)
6. Maintenance...............................................43
6-1 Replacing the O-rings (Motor insert) ..........................43
6-2 Replacing the O-rings (Motor rear side)......................44
6-3 Periodical Maintenance Checks.................................45
7. Troubleshooting ..........................................46
7-1 Error Code ...............................................................46
7-2 Troubles and Actions.................................................47
8. Specifications .............................................48
8-1 Specifications...........................................................48
8-2 Symbol ....................................................................49
9. After-sales Service......................................50
9-1 Warranty..................................................................50
9-2 Spare Parts List........................................................50
9-3 Option Parts List.......................................................51
9-4 Disposing product.....................................................51
10. EMC Information .........................................52
(Electromagnetic Compatibility Information)
English

2
CAUTION
U.S. Federal law restricts this device to be used by or on the order of a licensed dental professional.
Thank you for purchasing the NSK NLZ E / NLZ motor system.
This product can be connected to a dental unit (air unit), which is currently in use, to equip it with a
brushless electric micromotor with LED light.
Please read this Operation Manual carefully before use for operation instructions and maintenance
guidelines to increase overall product life span. Keep this Operation Manual in a handy place for future
reference.
1-1 Outline
NLZ Motor Systems are available in two models.
NLZ Motor Set, which consists of the main unit, the control unit (Endo function not available) and the
Motor.
NLZ E Motor Set, which consists of the main unit, the control unit (Endo function available) and the Motor.
Optional
1-2 User and Indications for Use
User:
U.S. Federal law restricts this device to be used by or on the order of a licensed dental professional.
Indications for Use:
The NLZ Motor System is intended for use by dental professionals in the performance of dental restoration,
prophylaxis and endodontic procedures.
The NLZ Endo is intended for use by dental professionals in the performance of dental endodontic
procedures.
Introduction
1

English
Introduction
3
1-3 Precautions for handling and operation
ŘPlease read these precautions carefully and use only as intended or instructed.
ŘSafety instructions are intended to avoid potential hazards that could result in personal injury or damage
to the device. Safety instructions are classified as follows in accordance with the seriousness of the risk.
Class Degree of Risk
WARNING Hazard that could result in serious injury or damage to the device if the
safety instructions are not correctly followed.
CAUTION Hazard that could result in light or moderate injury or damage to the device
if the safety instructions are not correctly followed.
NOTICE General product specification information highlighted to avoid product
malfunction and performance reduction.
WARNING
ŘDo not disassemble, adjust or alter the motor or handpiece except as recommended by NSK in this Operation
Manual.
ŘDo not handle the AC power cord or any other components of this system with wet hands. Touching electrical
devices with wet hands may result in electric shock.
ŘAvoid splashing water into or near the control unit. Otherwise it could cause short circuits and lead to fire and/or
electric shock.
ŘDo not allow any impact on to the product. Do not drop the product. Doing so might cause electric shock or
malfunction.
ŘDo not operate this product close to patients with cardiac pacemakers. It may affect the function of pacemaker.
ŘKeep this product away from explosive substances and flammable materials. Also, do not use this product on or
near patients who have been administered flammable anesthesia, such as dinitrogen monoxide.
ŘIf the product overheats or smells like burning, immediately turn OFF the power switch, disconnect the power
plug (by pulling the plug, not the cable) and contact your Authorized NSK Dealer.
ŘWhen using of this equipment adjacent to or stacked with other equipment, this equipment and the other
equipment should be observed to verify that they are operating normally.
ŘConnect the handpiece to the motor, rotate before using to check for motor/handpiece vibration, noise or
overheating. If any abnormalities occur, stop using the product immediately and contact your Authorized NSK
Dealer. (Refer to "3-9 Check before treatment")
ŘShould the product function abnormally during use, stop using the product immediately and contact your
Authorized NSK Dealer.
ŘIf the product has not been used for a long period, rotate the motor/handpiece and check for noise, vibration or
overheating before use.
<Motor, Handpiece (Option)>
ŘImmediately after a treatment (within 1 hour), perform maintenance and then store the motor and the handpiece.
Failure to properly maintain the motor and the handpiece may lead to overheating, causing infection, burn
injuries or product failure. Follow maintenance procedures as instructed in this manual and operation manual of
the handpiece.

Introduction
CAUTION
ŘPlace the most priority on patient safety.
ŘThe product is designed only for clinical dental use by qualified personnel. This product must not be used for oral
surgery, implants or dental laboratory work.
ŘThis product may be used only by Dental Professionals, such as Dentists in dental clinics or other medical
premises including hospitals.
ŘThe product must be used in a dental clinic, hospital or other dental institution.
ŘThe user shall be responsible for any judgment that relates to the application of this product to a patient.
ŘThe user is responsible for the operational control, maintenance and continual inspection of this product.
ŘDo not use the product outside the specified use environment. It may cause malfunction. (Refer to “8-1
Specifications”)
ŘOperators and all others in the area must wear eye protection and a mask when operating this handpiece.
ŘUse only the AC adapter, AC power cord provided with the product. Never use other AC adapters. Doing so might
cause a malfunction.
ŘThe AC power cord is the means to cut off commercial power supply. Make sure that the AC power cord can be
pulled out from the power outlet without delay in an emergency. Do not place any articles within 15cm of the AC
power cord.
ŘWhen dirt adheres to the control unit, main unit or AC Adaptor, turn OFF the power, wipe off the dirt with a firmly
wrung moist cloth, and then wipe thoroughly with a soft, dry cloth.
ŘDo not use the following fluids to wipe, immerse or clean the product; strong / super acid water, strong acid /
alkaline chemicals, chlorine-containing solutions, solvents such as benzene or thinner. (Refer to “5. Post-use
Maintenance”)
ŘPerform regular function and maintenance checks. (Refer to “6-3 Periodical Maintenance Checks”)
ŘThis product is rated Medical Electrical equipment. EMC (Electromagnetic compatibility) is described in the
documentation included. Installation and use of this product requires special precautions regarding EMC
according to the EMC information. (Refer to “10. EMC Information (Electromagnetic Compatibility Information”))
ŘPortable and mobile RF communications equipment can affect Medical Electrical equipment. Do not use RF
equipment near the product.
ŘUse only authorized components. Use of other components might impair the EMC performance of the product.
ŘMake sure that each part is properly connected. Improper connections might cause faulty operation, LED lighting
failure and water or air leakage.
ŘThe AC power cord included with the product has the length of 2 meters. Bundle and fix the extra cord to prevent
the operator or the patient from inadvertently stepping on it.
<Control Unit, Main Unit>
ŘWhen disconnecting the AC power cord, motor cord or other cords, hold the cords by their plug and pull the plug
out. Holding and pulling the cord might snap the wiring in the cord and cause a malfunction.
ŘWhen installing the control unit, motor and other components, provide enough room to avoid bending or twisting
the tubing or the cord.
ŘDo not sterilize the control unit, main unit, AC adapter, AC power cord, motor cord.
4

English
Introduction
<Motor, Handpiece (Option)>
ŘThe output torque changes according to the type of handpiece connected to the motor, operating conditions
and other factors. Be sure to use a handpiece made by NSK. (Refer to “4-4 Contra-Check Function”) Use of a
handpiece made by a different manufacturer might cause trouble such as disparity between the preset and the
output torque.
ŘEnsure that the motor has completely stopped rotating before handling. Connecting or disconnecting the
handpiece while the motor is rotating may result in injuries or damage the handpiece.
ŘDo not point the light illuminated from the motor and handpiece directly into patient's or operator's eyes. Doing
so might damage the eyes.
ŘThe motor is delivered in a non-sterile condition and must be performed steam sterilization prior to use.
ŘDo not lubricate the motor. It may cause overheating and product failure.
ŘUse moisture- and dust-free air as the supply air. Mixing in of moisture might cause malfunction or heat
generation.
ŘConnect only ISO 9168-compliant, Type 2 (Midwest 4 holes), or Type 3 (ISO-compliant standard 4 holes with
light) tubing.
ŘMake sure to supply coolant air. Otherwise, the motor/handpiece surface might reach a temperature of 51°C or
higher.
NOTICE
ŘDuring operation, the motor and motor cord may affect computers, LAN cables in the vicinity of use.
Noise could be heard during operation near a radio receiver.
ŘUse the "Power Key" to turn ON/OFF the power on a daily basis. If the system is not used for a long
period of time or if the system malfunctions, turn OFF the power of the main unit, disconnect the
power cord, and drain water from main unit, tubing and motor cord.
ŘFor details on handling the handpiece, refer to the Operation Manual of the handpiece.
ŘOnly authorized service personnel should inspect inside the product by following the instructions in
the service manual. Leave the product with your Authorized NSK Dealer, if necessary.
ŘNo special training is required to operate this device.
ŘDrain water from the main unit, turbing and motor cord, if the main unit is not to be used for a long
time.
5

Introduction
6
1-4 Classification of Equipment
ŘType of protection against electric shock:
- Class ll equipment
ŘDegree of protection against electric shock:
- Type B applied part: (Applied parts: Motor, Handpiece)
ŘMethod of sterilization or disinfection recommended by the manufacturer:
- Refer to ”5-3 Packaging, Sterilizing, Drying and Storage (Motor)”
ŘDegree of protection against ingress of water as detailed in the current edition of IEC 60529:
- Control Unit: IPX0 (Not protected)
ŘDegree of safety of application in the presence of a flammable anesthetic mixture with air or with oxygen
or nitrous oxide:
- Equipment NOT suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen
or nitrous oxide.
ŘMode of operation:
- Intermittent operation ( ON:3 min, OFF:10min.)

English
7
Components
2
2-1 List of components
1
5
9
2
6
10 11
3
7
4
8
No. Part Name Quantity Remark
1 Control unit 1 The control unit and the main unit are connected via the link cable.
2 Main unit 1
3 Motor 1 -
4 Motor cord 1 Cord length: 1.8m
5 Purge nozzle 1 For purging excess oil (compatible with ISO 3964-compliant
handpieces)
6 AC adapter 1 Cord length: 5m
7 AC power cord 1 Cord length: 2m
8 O-ring set 1set
Spare parts
For the motor insert joint (Black: 3pcs., Blue: 1 pc.)
For the pipes at the rear side of the motor (Black: 5 small pcs.)
9 Mounting bracket 1 For the main unit
10 Mounting screws
and nuts 1set M5x30 screw (2 pcs.), M4x30 screw (2 pcs.), M4 flat head screw (2 pcs.), M5 nut (2 pcs.), M4 nut (2 pcs.)
11 Cable tie 2 For fixing the link cable

8
Components
2-2 Part Names of Control Unit and Main Unit
Power switch
LCD Display
Tubing connector
Link cable
(cable length: 1m)
Motor cord connector
Control panel AC power cord connector
< Control Unit > < Main Unit >

English
9
Components
LCD Display and the Control Panel of the Control Unit
< NLZ E >
1
I
10
B
9
A
7
D
8
E
11
6
C
5
4
F
3
G
2
H
< NLZ >
1
10
B
A
7
D
8
E
11
6
C
5
4
F
3
G
2

Components
No. Key Name Display Function
1Power Key -
Press once to turn ON the power. When the power is ON,
hold it down for more than two seconds to turn OFF the
power
2Memory Key G
In General Application Mode:
Motor speed can be adjusted between 100 and
40,000 min-1.
In Rotary Endo Mode:
Motor speed can be adjusted between 100 and
6,000 min-1.
*Display value changes interlocked with the gear ratio.
3
Torque Key
(NLZ E)
B
When gear ratio is set by each time pressing this key you
can adjust the torque.
Rotary Endo Mode
Gear Ratio Torque Range (N·cm) Increment (N·cm)
1:1 0.3 - 3.0 0.1
4:1 0.8 - 6.0 0.4
6:1 1.0 - 6.0 1.0 - 1.2:0.2
1.2 - 6.0:0.6
-Change the setting as described in “3-8 Changing the
settings for various functions”
Setting Key
(NLZ) -Change the setting as described in “3-8 Changing the settings for various functions”
4Speed Key A
In General Application Mode:
Motor speed can be adjusted between 100 and
40,000 min-1.
In Rotary Endo Mode:
Motor speed can be adjusted between 100 and
6,000 min-1.
*Display value changes interlocked with the gear ratio.
5Check Key CCheck the status of the handpiece as described in “4-4
Contra-Check Function”
6Light Key D
Set light intensity (Strong·Moderate·Weak·OFF)
By each time pressing this key you can change the
volume from OFF -> intensity 1 -> intensity 2 -> intensity
3 and then back to OFF again
* The light can be turned on for 5 seconds by pressing the
key while the motor is stopped.
10

English
Components
11
No. Key Name Display Function
7Volume Key E
Set the volume of the notifying sound generated when
reaching a set torque limit value or when errors occur
(High·Low·OFF)
By each time pressing this key you can change the
volume from OFF -> volume 1 -> volume 2 and then
back to OFF again
CAUTION
When the volume is set to OFF, there will be no alarm
sound. Care should be taken when using the system with
the volume set to OFF.
8Gear Key F
By each time pressing this key you can switch the gear
ratio
from 1:5 -> 1:1 -> 4:1 -> 6:1 -> and then back to 1:5
again – in General Application Mode
from 1:1 -> 4:1 -> 6:1 -> and then back to 1:1 again –
in Rotary Endo Mode
9
Auto Rev. Key
(NLZ E)
*Rotary Endo
Mode Only
H
By each time pressing this key you can switch the mode
between AUTO STOP -> AUTO REVERSE STOP -> AUTO
REVERSE FORWARD and then back to AUTO STOP again
AUTO STOP AUTO REVERSE
STOP
AUTO REVERSE
FORWARD
10
Mode Key
(NLZ E)
Setting Mode
Key
(NLZ)
I
Toggles between 3 application modes as below
General
Application Mode:
Rotary Endo
Mode: Reciprocating Endo Mode:
No display
-Change the setting as described in “3-8 Changing the
settings for various functions”
11 Rev. Key - The rotation direction can be changed by this key. The
LED lights up during reverse rotation.

12
CAUTION
Make sure that each part is properly connected. Improper connections might cause faulty operation, LED lighting
failure and water or air leakage.
3-1 Installing the Main Unit and the Control Unit
1Fix the main unit to the dental unit using the
screws. As shown below: 2Place the control unit on the tray of the dental unit.
M4x30, M5x30
with the nut
( included)
M4 flat head screw
( included )
3Bundle the link cable appropriately and fix it by cable tie.
Cable tie
(included)
4If you wish to install as shown below, optional parts are available for purchase.
( Refer to “ 9-3 Optional Parts List ” )
Installation example using
NLZ STAY
Installation example using
NLZ MOUNTING PLATE
Preparations for Use
3

English
Preparations for Use
13
CAUTION
ŘKeep the main unit away from water.
ŘThe control unit incorporates a LCD panel. Place the unit where the operator can see the display.
ŘDo not bend the tubing forcibly when putting the main unit in place. Allow some extra space for tubing to avoid
pinching or bending it.
3-2 Connecting the Tubing
Align the tubing from the dental unit and the tubing connector at the
back of the main unit ( 1). Insert it firmly and tighten it completely
(2).
POWER
AC28V
OUT IN
①②
CAUTION
ŘBe sure that there is no air or water coming from tubing when attaching it to the main unit.
ŘUse moisture- and dust-free air as the supply air. Mixing in of moisture might cause malfunction or heat
generation.
ŘScrew the nut properly without unnatural force, when you plug in tubing connector and motor cord connector.
Avoid cross threading.
ŘConnect only ISO 9168-compliant, Type 2 (Midwest 4 holes), or Type 3 (ISO-compliant standard 4 holes with
light) tubing.
ŘAir requirement: dry, free from contamination and oil. Use a compressor with a dry air system. Install an air filter
if necessary. Blow out the lines before installation.
ŘDo not pull the tubing using more than necessary force.
ŘMake sure to supply coolant air. Otherwise, the motor/handpiece surface might reach a temperature of 51°C or
higher.

14
Preparations for Use
3-3 Connecting the Motor Cord
Align the motor cord plug and the motor connector at the back of the
main unit ( 1). Insert it firmly and tighten it completely ( 2).
POWER
AC28V
OUT IN
①
②
CAUTION
ŘGently screw in the nut of the motor cord plug when tightening it.
ŘDo not pull the motor cord using more than necessary force.
3-4 Connecting the AC Adapter
1Check that main power switch is off. ( side) 2Insert the AC adapter plug, with the arrow facing
up, into the AC power cord connector at the back
of the main unit firmly.
POWER
A
C
OUT
POWER
AC28V
OUT IN

English
15
Preparations for Use
3-5 Connecting the AC Power Cord
1Insert the AC power cord into the inlet of the AC
adapter. 2Insert the AC power cord plug to commercial power supply outlet.
CAUTION
ŘDuring this procedure the power switch of the main unit should remain OFF.
ŘThe AC power cord included with the product has the length of 2 meters. Bundle and fix the extra cord to prevent
the operator or the patient from inadvertently stepping on it.
ŘUse only the AC adapter, AC power cord provided with the product. Never use other AC adapters. Doing so might
cause a malfunction.
ŘWhen disconnecting the AC power cord, motor cord or other cords, hold the cords by their plug and pull the plug
out. Holding and pulling the cord might snap the wiring in the cord and cause a malfunction.
3-6 Connecting / disconnecting the motor and motor Cord
<Connecting> <Disconnecting>
Align and insert the pins of the connector carefully and
firmly into the pin holes of the motor, and fasten the
motor nut securely.
Unscrew and detach the motor cord nut, and gently
pull out the motor cord.
Pin Hole
Motor Tighten
Loosen
Motor Cord NutMotor Cord Connector

16
Preparations for Use
3-7 Connecting / disconnecting the motor and the handpiece (option)
<Connecting>
1Insert the E-type handpiece into the motor insert,
and turn until it clicks as the positioning pin on
the handpiece falls into positioning hole on the
motor.
2Confirm that the handpiece is securely connected
to the motor.
MotorHandpiece (option)
<Disconnecting>
Simply pull out the handpiece from the motor.
CAUTION
ŘEnsure that the motor has completely stopped rotating before handling. Connecting or disconnecting the
handpiece while the motor is rotating may result in injuries or damage the handpiece.
ŘBe sure to adjust the rotation speed of the motor within the allowable rotation speed of the handpiece (option).
ŘLubricated handpiece should stand and allow oil to drain prior to steam sterilization cycle. Attach to the motor
after the excess oil has been completely drained. If the oil enters the motor, it may cause malfunction of the
motor.
ŘAfter lubrication, keep the handpiece standing apart from the motor. Connect the handpiece to the motor when
using.
ŘDo not allow water to enter the motor. It may cause malfunction of the motor.
ŘBefore each use, operate the motor outside the patient's oral cavity. If any abnormality, such as vibration, noise
or overheating occurs, stop using the product immediately and contact your Authorized NSK Dealer. (Refer to
"3-9 Check before treatment")

English
17
Preparations for Use
3-8 Changing the settings for various functions
Settings for various functions can be changed from their default values. This is to make the system easier
to use, when it is used for the first time after purchase. You will need to enter into the setup mode, change
the settings and save the new ones as below:
1Turn ON ( I side ) the power switch on the main
unit. 2Press the Power Key on the control unit.
2
3Hold down the Mode Key* for more than two
seconds. With an alarm sound, "System" and
"Setup" on the LCD display will start blinking and
the system will enter into the setup mode.
* The Setting Mode Key in case of NLZ
3
Blinking

18
Preparations for Use
4In the setup mode, the function item can be
selected using the Speed Key (+/-) ( 1), and
the value can be changed using the Torque Key
(+/-)* ( 2).
* The Setting Key (+/-) in case of NLZ
5Once a value is changed, the new value will
blink. Press the Mode Key quickly to save the
new value. Once saved, this new value will stop
blinking.
4- 14- 2
5
6Change the settings by pressing the Torque Key
(+/-). * The Setting Key (+/-) in case of NLZ
6

English
Preparations for Use
19
<Setting each function item>
Display Function item Factory Setting Setting Range
Foot Air Calibration:
This function enables
you to use the maximum
speed 40,000 min-1, even
though the air pressure
of the dental unit is not
high enough, by setting
air pressures for “motor
startup speed” and
“maximum motor speed”.
Air pressure for motor
startup speed:
This is the lower limit
of the air pressure at
which the motor starts to
operate.
0.5bar
(0.05MPa)
0.3 – 3.0bar
(0.03 - 0.3MPa)
(@ 0.1bar
increments)
Air pressure for maximum
motor speed:
This is the upper limit of
the air pressure at which
the motor will run at its
maximum speed.
This value can be set
only when there is an
air supply at a pressure
of equal or higher than
1.5bar.
1.8bar
(0.18MPa)
1.5 - 3.0bar
(0.15 - 0.3MPa)
(@ 0.1bar
increments)
Delay time for the light:
This function sets the delay time for the white illumination
lamp going off after the motor stops.
3 seconds
0 - 10 seconds
(@ 1sec.
increments)
The notifying sound :
This function sets the volume for the operation tone
when a key is pressed.
High=2
High=2
Low=1
OFF=0
Contra-Restriction:
This function automatically slows down and stops the
rotation of the motor when the checking result through
Contra-Check is either “OIL” or “NG”. The motor cannot
be activated when the checking result is “NG” blinking
which shows the status of handpiece defect. (Refer
to “4-4 Contra-Check Function” and “4-8 Overheat
Prevention”)
ON=1 ON=1
OFF=0
Contra-SAFE:
This is a function to stop the rotation of the motor when
continuous motor high-load current is detected with a 1:5
increasing handpiece.*
In this mode, there are selectable three sensitivity levels:
Fast, standard and Slow and the “Fast” setting offers
the most sensitive response. (Refer to “4-8 Overheat
Prevention”)
*Use NSK handpieces : the model of Z95L, Z85L, X95EX,
X95L, X95, M95L, M95, X85L, X85 of 1:5 Gear Ratio.
Standard=2
Fast=3
Standard=2
Slow=1
No stop=0