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Summary of Contents for Nidek Medical Lfu 220
- Page 1 LENS DUST FILTRATION UNIT OPERATOR’S MANUAL...
- Page 2 Original instructions NIDEK CO., LTD. : 34-14 Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, JAPAN (Manufacturer) Telephone: +81-533-67-6611 URL: https://www.nidek.com/ NIDEK INC. : 2040 Corporate Court, San Jose, CA 95131, U.S.A. (United States Agent) Telephone: +1-800-223-9044 (USA Only) URL: https://usa.nidek.com/ NIDEK S.A. : Ecoparc, rue Benjamin Franklin, 94370 Sucy En Brie, FRANCE (EU Authorized Representative) 2021-06-15...
- Page 3 Use this instrument properly and safely. BEFORE USE, READ THIS MANUAL. This operator’s manual includes operating procedures, safety precautions, and specifications for the NIDEK LENS DUST FILTRATION UNIT, Lfu 220. Cautions for safety and operating procedures must be thoroughly understood before using this instrument.
- Page 4 Usage precautions Before Use • Do not use this instrument for other than the intended purpose. CAUTION NIDEK will not be responsible for accidents or malfunction caused by misuse. • Never disassemble nor touch the inside of the instrument. This may result in electric shock or malfunction. •...
- Page 5 • Install the instrument in a stable and level place where shock does not occur. CAUTION Tilting or vibration can prevent normal lens processing. • Move the instrument after removing all water and processing waste. When moving the instrument to a different location, be sure to remove the water tank and lift the instrument holding it by its base with both hands by at least two persons.
- Page 6 The round filter can be used twice by turning over the surface to be used. • Be sure to turn on the power switch of the Lfu 220 while processing lenses. Processing lenses with the power switch of the Lfu 220 off may cause water overflow or malfunction.
- Page 7 After Use • Occasionally clean the prongs of the power plug with a dry cloth. CAUTION If dust settles between the prongs, the dust will collect moisture, and short circuit or fire may occur. • If the instrument will not be used for a long time, disconnect the power cord from the wall outlet.
- Page 9 Table of Contents 1. BEFORE USE ........1 1.1 Outline of Instrument .
- Page 10 6. INDEX ........39 VIII...
- Page 11 BEFORE USE Outline of Instrument The NIDEK Lfu 220 is a centrifuge filtration unit which is connected to a lens edger. The rotor rotates at a high speed to separate the processing waste from water used during lens pro- cessing resulting in substantial reduction of the frequency of water replacement.
- Page 12 BEFORE USE: Configuration Configuration General view 1. Body cover 2. Filter holder 3. Round filter 4. Waste bucket 5. Exhaust port 6. Feedwater hoses Power switch 7. Water tank Handle Control panel 1. Body cover There is a rotor to separate the processing waster from water. The top is provided with an aperture to connect the drain hose.
- Page 13 BEFORE USE: Configuration 2. Filter holder Cover that holds the round filter to the rotor • Be sure to turn the three levers to lock the filter holder. CAUTION 3. Round filter Covering filter that prevents the processing waste from coming out from the rotor It can be used on both sides.
- Page 14 BEFORE USE: Configuration Rear view 8. Trigger inlet 9. Inlet 8. Trigger inlet (TRG) For connection with the lens edger outlet The outlet to be connected depends on the model of the lens edger. 9. Inlet The power cord is connected.
- Page 15 BEFORE USE: Configuration Control panel 13. Dewatering start button 12. Process count LED 14. Dewatering operation LED 15. Interlock error LED 11. Auto/Manual LED 16. Vibration error LED 10. Auto/Manual start 17. Rotation LED button 18. Buzzer OFF/Process count clear button 10.
- Page 16 BEFORE USE: Configuration 15. Interlock error LED Lights when an interlock error occurs. An interlock error occurs when the following is detected. • The body cover is opened while the rotor is rotating. • With the body cover open, activation of the rotor is attempted. 16.
- Page 17 BEFORE USE: Configuration Labels and indications on the instrument To call attention to users, some labels and indications are provided on the instrument. Indicates that caution must be taken. Refer to the operator’s manual before use. Indicates that caution for electric shock must be taken. Indicates that entanglement should be avoided.
- Page 18 • Keep the power switch on at all times. Processing lenses with the power switch of the Lfu 220 off may cause water overflow or malfunc- tion. When the instrument is not used for a long time, however, turn off the power switch and remove the...
- Page 19 OPERATING PROCEDURES Filtration The Lfu 220 is normally used in auto operation mode. As the filtration unit is activated or deactivated by signals from the lens edger in auto operation mode, there is no need for operator supervision. In auto operation mode, the Auto/Manual LED is lit.
- Page 20 After pro- cessing waste has accumulated to this point, filtra- tion of the Lfu 220 does not function. • Depending on the lens edger, resumption or Replacement indication circle...
- Page 21 OPERATING PROCEDURES: Processing Waste Disposal Time Notification Function Changing the target process count This is the setting of the target process count to sound a buzzer to indicate the need for disposal of the processing waste. The factory setting is 80 lenses. Change the setting as appropriate. While the Auto/Manual LED is lit and the rotor is not rotating, press and hold the dewa- tering start button until a buzzer sounds.
- Page 22 OPERATING PROCEDURES: Processing Waste Disposal Time Notification Function It is possible so as not to sound the processing waste disposal notification buzzer. It is possible so as not to sound the processing waste disposal notification buzzer. Even in such cases, the process number is counted.
- Page 23 OPERATING PROCEDURES: Changing the Buzzer Volume Changing the Buzzer Volume The volume of the buzzer that sounds when the specified process count is reached, or an interlock or vibration error occurs can be changed. While the Auto/Manual LED is lit and the rotor is not rotating, press and hold the Auto/ Manual start button until a buzzer sounds.
- Page 24 If the processing water is very dirty, replace the water. See “3.3 Replacing the Water” (page 25). E. Check to make sure that the Lfu 220 does not contact the table on which the lens edger is installed. If the Lfu 220 contacts the table, its vibration may affect the processing accuracy.
- Page 25 OPERATING PROCEDURES: Periodic check Periodic check It is recommended to perform periodic check every one year in order to use the instrument for a long time under normal conditions. The periodic check contains the performance check of the whole instru- ment and replacement of maintenance parts.
- Page 26 OPERATING PROCEDURES: Periodic check...
- Page 27 See “3.2 Disposing of Processing Waste” (page 19). • If the Lfu 220 contacts the table, move it so that it does not contact. • Turn off the power and check that the filter holder is locked at three An unusual noise is heard.
- Page 28 MAINTENANCE: Troubleshooting Symptom Actions • Check whether the connection hose for the deodorizer does not become loose. • Close the processing chamber door while the lens edger is not in use. When a deodorizer is connected, check that the timer setting in The odor of water is offensive.
- Page 29 Check that the rotor is stopped. Drain hose Check that the rotation LED is off. Disconnect the drain hose from the Lfu 220. Pull out the Lfu 220 forward. Use the handle to pull it out. Check that no processing waste remains in the drain hose aperture (hole in body cover with drain hose disconnected).
- Page 30 MAINTENANCE: Disposing of Processing Waste Release the two locks and use the two han- Locks dles to remove the body cover. Put the body cover upside down. Check that no water remains in the rotor. If the water remains, reattach the body cover, lock the cover, and press the dewa- tering start button.
- Page 31 Remove the waste bucket containing the processing waste using the waste bucket removal jig and dispose of it. 1) Prepare a plastic bag, bucket, or such for the processing waste around the Lfu 220. 2) Hook the waste bucket removal jig to the two holes in the center of the waste bucket to remove it.
- Page 32 MAINTENANCE: Disposing of Processing Waste Set the round filter so that it does not over- lap the rotor. The round filter can be used on both sides. After one side is used, set the surface which has not been used face down. Round filter Refill the water tank with water.
- Page 33 MAINTENANCE: Disposing of Processing Waste Set the filter holder so that the holes of the Pins filter holder fit in the three pins on top of the rotor and then fully turn the three levers counterclockwise to lock. Check that the filter holder is secured to the rotor.
- Page 34 Restore the Lfu 220 to the table and recon- Locks Body cover nect the drain hose. • Be sure not to contact the Lfu 220 with the table. If the Lfu 220 contacts the table, its vibration may affect the processing accuracy.
- Page 35 • There are no functions to indicate the need for water replacement so take note of when the water has been replaced. • If the water level falls to less than the top of the pump, the pump may be damaged. Disconnect the drain hose from the Lfu 220. Feedwater hose Drain hose Pull out the Lfu 220 forward.
- Page 36 MAINTENANCE: Replacing the Water Disconnect the power cord of PUMP 1 and PUMP 2 from the connectors. Release the locks on the front and rear sides. Remove the water tank. Pull the four latches of the water tank to release Latches of and remove the cover of the water tank.
- Page 37 (only when the deodorizer is connected). Connect the two feedwater hoses to the relay hoses labeled the same number. Push the hose until it clicks. Restore the Lfu 220 to the table and reconnect the drain hose. Exhaust nozzle Deodorizer...
- Page 38 MAINTENANCE: Replacing the Stocking Filter Replacing the Stocking Filter The stocking filter is used to filter out any fine processing waste suspended in the water to prevent clogging in the hose, pump, or tank of the lens edger when a light material lens (such as polycarbon- ate or trivex) is processed.
- Page 39 MAINTENANCE: Replacing the Stocking Filter 3) While holding the upper flange, first put Edge the stocking filter into the tank and then insert the stocking filter holder into the tank positioned as in the figure to the right. Note: Be sure not to brush against the edge of the tank aperture (dashed line in the figure to the right).
- Page 40 MAINTENANCE: Replacing the Stocking Filter Pull the lower side of the stocking filter holder forward (in the direction of the tank aperture) and put it down. See the figure to the right and sectional view to the lower right. 1) Pull the lower part of the stocking filter holder forward (in the direction of the tank aperture).
- Page 41 MAINTENANCE: Cleaning the Exterior Cleaning the Exterior When the cover of the instrument becomes dirty, clean it with a soft cloth. For severe stains, soak the cloth in a neutral detergent, wiring well, and wipe. Finally dry with a soft, dry cloth. •...
- Page 42 MAINTENANCE: List of Consumables and Maintenance Parts...
- Page 43 SPECIFICATIONS AND ACCESSORIES Safety Features For safe use, the instrument is provided with the following features. [Interlock switch] An interlock switch is provided so that the rotor does not rotate with the body cover open. If even one of the locks of the body cover is released during rotor rotation, a buzzer sounds continuously and the rotor comes to an emergency stop.
- Page 44 SPECIFICATIONS AND ACCESSORIES: Specifications Specifications General specifications • Processing waste maximum collection capacity 2.7 liters • Tank capacity 10 liters (when water is filled up to the position indicated by the Max. line) • Filtration efficiency 85% (target) Power requirements •...
- Page 45 SPECIFICATIONS AND ACCESSORIES: Standard Configuration Standard Configuration 4.3.1 Standard accessories • Round filter 5 units • Waste bucket 10 units • Waste bucket removal jig 1 unit • Filtration bag 1 unit • Stocking filter 2 units • Stocking filter holder 1 unit •...
- Page 46 SPECIFICATIONS AND ACCESSORIES: Standard Configuration...
- Page 47 APPENDIX Instrument Status and LED Indications Auto/ Dewatering Interlock error Vibration Rotation Manual operation Buzzer Instrument status error LED Standby state in automatic operation mode Blinks in conjunction Operational state in automatic operation with rotor mode rotation Blinks in conjunction Manual operation mode with rotor rotation...
- Page 48 APPENDIX: Glossary Glossary Body cover Used to cover the rotor. The rotor does not rotate unless this cover is closed. Filter holder Used to hold the round filter to the rotor. Interlock error This is the state when the release of the lock on the body cover has been detected during rotor rotation.
- Page 49 INDEX A buzzer sounds continuously....17 Label ........7 A buzzer sounds repeatedly.
- Page 50 INDEX:...
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