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Nautilus Bike U916-R916 Service Manual

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10. 10

14. 14

4. 4 Contents

34. 34 Electrical Troubleshooting

22. 22 Electrical Troubleshooting

66. 66

1. Be Strong. ™ PN 001-6884 Rev B (03/27/2007) Service Manual Commercial Series Bike Model: U916 & R916 Model U916 Model R916

7. 7 Nautilus® Commerical Series Bike Service Manual s afety Warning Labe L s The . following . safety . warnings . are . located . on . the . Nautilus ® . Commercial . Series . Bike. . Please . read . all . safety . precautions . and . warning . information . prior . to . using . your . product. . Be . sure . to . replace . any . warning . label . if . damaged, . illegible, . or . missing. .. If . you . need . replacement . labels, . please . call . a . Nautilus . Representative . at . (800) . 628-8458 . (North . America) . or . +41-26-460-77-77 . (International . office). Label 2 Label 2 Label 1 Label 1

54.  4 Cable Connections - U916 HR Cables - Handlebars to Front Mast: CABLES WIRE . TIE . MAST HANDLEBARS Cables . enter . Mast . through . handlebar . support . arm Cables . exit . from . Mast Connect . the . attached . long . Wire . Tie . to . the handlebar . cables . and . use . it . to . pull . the cables . out . through . the . Mast . . . Discard . the Wire . Tie . after . use. .. (The . main . and . TV . cables . are . not . shown, . for . clarity.) no TE: .. TAKE . CARE . NOT . TO . PINCH . CABLES . WHEN . ASSEMBLING.

59.  Nautilus® Commerical Series Bike Service Manual Appendixes Contents Appendix . A— Required . Tools ...................................................................... 60 Appendix . B—Using . a . Multimeter ............................................................... 61 Appendix . C—International . Power . Plug . Configurations .............................. 64

8. 8 s afety Warning Labe L s The . following . safety . warnings . are . located . on . the . unit. . Please . review . and . understand . the . safety . warning . labels . and . their . locations . on . the . unit . prior . to . use. . If . you . do . not . have, . or . cannot . find, . or . need . to . replace . a . warning . label . please . call . 1-800-628-8458 . (North . America) . or . . +41-26-460-77-77 . (International . office) . to . obtain . a . new . label. . Label 1: See . Figure . 1 . for . general . warning . label. . Location: .. The . warning . label . in . Figure . 1 . is . located . on . the . side . of . the . console . mast. Label 2: See Figure 2 for general exercise warning label. Location: Affixed . to . the . console . face . below . the . keypanel. f igure 1 f igure 2

53.  3 Nautilus® Commerical Series Bike Service Manual CABLES Cable Connections - U916 Cable Connections - U916 Routing . and . connector . points . for . the . main . U916 . cable . connections . are . shown . below. .. Wiring . diagrams . for . the . U916 . console, . handles . and . main . power . are . provided . in . Section . 2. Main and T v Cables - Frame to Front Mast: Connect . the . attached . long . Wire . Tie . to . the main . and . TV . cables . and . use . it . to . pull . the cables . up . through . the . Mast . . . Discard . the Wire . Tie . after . use. no TE: .. TAKE . CARE . NOT . TO . PINCH . CABLES . WHEN . ASSEMBLING. WIRE . TIE MAST MAIN . FRAME Cables . enter . Mast Cables . exit . from . Mast

2. 2 This manual is intended for authorized Nautilus or Nautilus certified service personnel and not for the consumer. There are no user serviceable parts. Servicing of the Nautilus ® Commercial Series Bike by other than authorized Nautilus or Nautilus certified service personnel may result in voiding of the warranty . If you are a consumer and require technical support to resolve a problem with your Nautilus ® Commercial Series Bike, please call Nautilus ® Customer Service at 800-628-8458 (North America) or +41-26-460-77-77 (outside North America). Important—Please Read

68. Be Strong. ™ For more information about our Commercial Series exercise machines or other Nautilus ® equipment for your home, visit w w w.Nautilus.com. © 2 0 0 6 Nautilus, Inc. All rights reser ved. Nautilus, the Nautilus Logo, ROC, Remote Operation Control, Be Strong, StairMaster and StepMill are either registered trademarks or trademarks of Nautilus, Inc. All others are trademarks of their respective company. Nautilus, Inc. World Headquar ters, 16 4 0 0 SE Nautilus Drive, Vancouver, Washington, USA 9 8 6 8 3, 1-8 0 0-62 8-8 4 5 8, w w w.Nautilus.com. Model U916 Model R916

9.  Nautilus® Commerical Series Bike Service Manual Maintenance 1 Contents Maintenance . Records .................................................................................. 11 Resetting . the . Maintenance . Hour . Timer ...................................................... 11 Routine . Maintenance .................................................................................. 11 Checking . the . Battery . Charge ....................................................................... 11 Recharging . the . Battery . Back-up .................................................................. 12 Battery . Disposal ........................................................................................... 12

58.  8 Cable Connections - R916 HR Cables - Handlebars to Main Frame: MAIN . FRAME SEAT . ASSEMBLY Carefully . Align . the . Seat . Assembly . with . the Seat . Carriage. .. Connect . the . Heart . Rate . Cables .. from . the . Handlebars . to . the . cor - responding . connectors . exiting . the . Seat . Carriage. no TE: .. Use . caution . as . the . Seat . Assembly . is . not . secured . to . the . Seat . Carriage. .. It . is . easier . to . connect . the . cables . if . the . Carriage . is . positioned . toward . the . bottom . of . the . the . range. To . avoid . damage . to . the . Heart . Rate . Cables, . do . not . apply . excessive . force. SEAT . CARRIAGE HEART . RATE . CABLES CABLE . CONNECTORS

56.  6 Cable Connections - R916 Cable Connections - R916 Routing . and . connector . points . for . the . main . R916 . cable . connections . are . shown . below. .. Wiring . diagrams . for . the . R916 . console, . handles . and . main . power . are . provided . in . Section . 2. Main and T v Cables - Frame to Front Mast: Connect . the . attached . long . Wire . Tie . to . the main . and . TV . cables . and . use . it . to . pull . the cables . up . through . the . Mast. .. Discard . the Wire . Tie . after . use. no TE: .. TAKE . CARE . NOT . TO . PINCH . CABLES . WHEN . ASSEMBLING. CABLES WIRE . TIE MAST MAIN . FRAME Cables . enter . Mast Cables . exit . from . Mast Cables . exit . from . Mast Mast attached to Main Frame:

64. 64 International Power Plug Configurations Table B–1. International Power Plugs Power c ords System c ountry G UK C, E, F Europe J Swiss K Australia L a ppendix

57.  7 Nautilus® Commerical Series Bike Service Manual Cable Connections - R916 Main and HR Cables - Front Mast to Console: P1 P2 J5 Back of Console: Plug . the . Main . Console . Wire . into . the . large connector . labeled . J5 . on . the . back . of . the . Console. The . Right . Heart . Rate . Wire . is . labeled . with . an . “R”. .. Plug . the . Right . Heart . Rate . Wire . into . the . connector . labeled . P1 . on . the . back . of . the . console. Plug . the . Left . Heart . Rate . Wire . into . the . P2 connector. no TE: .. If . installing . the . optional . LCD . Monitor . refer . to . the . NV915 . installation . manual . at . this . time. . If . not . installing . the . LCD . Monitor, . wrap . the . end . of . the . TV . Cables . with . electrical . tape . and . tuck . them . into . the . Mast. M AIN. C ONSOLE. W IRE TV . C ABLES R IGHT. H EART. R ATE. W IRE L EFT. H EART. R ATE. W IRE MAST CONSOLE

36. 36 Mechanical Troubleshooting . Replacing . the . Lower . T-Bar . Right . or . Left . CHR . Plates ...................... 49 . Removing . the . Seat . Assembly ......................................................... 50 . Removing . the . Side . Covers .............................................................. 50 Removing/Replacing . Parts . - . R916 . Parts ...................................................... 51 . Removing . the . Side . Covers .............................................................. 51 . Removing . the . Left . and . Right . Rear . Covers ...................................... 52 Cable . Connections . - . U916 ........................................................................... 53 Cable . Connections . - . R916 ............................................................................ 56

21. 21 Nautilus® Commerical Series Bike Service Manual Electrical Troubleshooting 3 Contents U916 . and . R916 . Main . Power . Wiring . Diagram ......................................... 23 U916 . Console . Heart . Rate . Wiring . Diagram ............................................. 24 R916 . Console . Heart . Rate . Wiring . Diagram ............................................. 25 General . Bike . Electronics . Troubleshooting ............................................... 26 Contact . Heart . Rate . Testing ..................................................................... 28 Battery . Charge . Testing ............................................................................ 29 Alternator . Testing .................................................................................... 30 Start-Up . Circuit . Testing ........................................................................... 31 Load . Resistor . Testing .............................................................................. 32 Shut-Down . Testing .................................................................................. 33

11. 11 Nautilus® Commerical Series Bike Service Manual Maintenance Records For ease of maintenance the U916 and R916 console will keep track of hours, number of workouts, time between last servicing, etc. y ou can quickly access any of the custom menus by pressing [LEVEL: UP], [4], [ENTER]. The console will then display “MACHINE STATUS.” Use the [Level: UP] and [Level: DOWN] keys to scroll through the options. For details, refer to the Machine Status Console Codes. Resetting the Maintenance Hour Timer After each maintenance period reset the counter. Press [LEVEL: UP], [7], [ENTER]. Then use the Level keys to scroll through the options. When “MAINT HOURS” is displayed, press [ENTER]. Press the [0] key, then press [ENTER]. Press [CLEAR] to return to the opening screen. Routine Maintenance Upon receiving your machine, use a soft, clean towel to wipe off the dust, which may have accumulated during shipping. y our new machine will require minor assembly. Refer to the “Installation Instructions” section for details. Cleaning 1. DO NOT USE GLASS CLEANERS OR AN y OTHER HOUSEHOLD CLEANERS ON THE CONSOLE. Clean the console daily with a water-dampened cloth and wipe dry after cleaning. 2. Clean the exterior of the machine daily using soap and water or a diluted, non-mineral based household cleaner such as Fantastic®. Inspection 1. Frame: Inspect the frame for any rust, bubbling, or paint chips during the weekly cleaning. The salt in perspiration can damage the unpainted surfaces. Repair the damaged area with a touch-up paint kit purchased from Nautilus (call Customer Service for order information). Checking the Battery Charge 1. Using your multimeter, touch the red lead to the positive terminal of the battery and the black lead to the negative terminal. 2. If the voltage level is less than 6.1 VDC, charge the battery. Maintenance

13. 13 Nautilus® Commerical Series Bike Service Manual Console Codes 2 Contents Overview ...................................................................................................... 15 Defaults ........................................................................................................ 15 Customize ..................................................................................................... 15 Machine . Status ............................................................................................ 16 Diagnostics .................................................................................................. 17 Maintenance . Logs ....................................................................................... 18 Reset . Maintenance . Hours ....................................................................... 1 9 Error . Log .................................................................................................. 1 9 Machine . Configuration ................................................................................ 20

45. 4  Nautilus® Commerical Series Bike Service Manual Mechanical Procedures Step 3: Using the 15/16 socket, remove the Flywheel nut with an Impact wrench or similar tool. See Figure 24 . Step 4: Remove the Alternator Poly-V belt by slowly “walking off” the belt in a clockwise motion ( Figure 25 ). Step 5: Remove the Flywheel and Fan disk ( Figure 26 ). Step 6: Using a 6mm Allen wrench, 8mm Allen wrench, and 9/16 socket with ratchet, remove the two bolts that attach the Alternator to the frame. See Figure 27a and 27b . f igure 25 - f igure 26 - f igure 27a - Remove alternator mounting bolts f igure 27b -

12. 12 Recharging the Battery Back-Up The Commercial Series U916 and R916 bikes are both self-powered (cordless) with a rechargeable battery back-up. Typically, the bike can be operated without plugging in the battery charger. If, however, the console flickers during operation or the console display does not light up while using the machine, then use the battery charger to recharge the battery back-up. The battery charger is supplied with the unit and plugs into a standard 115 volt, 15 amp outlet, or a 220 volt, 15 amp outlet. (All major voltage plugs are available.) The plug-in for the battery charger is located in the front of the machine at the base. NOTE: If installing the optional LCD Monitor, refer to the NV915 installation manual at this time. Plug the wall pack battery charger into the connector and charge the battery for approximately 24 hours and then recheck it. It is okay to use the machine while the battery charger is connected. When the bike is not connected to an external power source, the console will power on as the user starts to pedal machine, and will stay lit for up to 60 seconds in pause mode. The console will power off after 60 seconds of stopping exercise. If the bike is connected to an external power source, the console will power on automatically and stay on until power is disconnected. Battery Disposal When ordering new batteries, you will need to properly dispose of (recycle) your old lead-acid batteries. Most federal and state regulations require lead-acid batteries to be recycled. Do not throw away old batteries. Lead is a toxic heavy metal, hazardous to living organisms. Disposal instructions and a list of recycling centers are tabulated in the Appendix. If you have questions, contact the Customer Service Department at 800-628-8458 (North America) or +41-26-460-77-77 (International office). Battery charger plug-in Maintenance

23. 23 Nautilus® Commerical Series Bike Service Manual U916/R916 Main Power Wiring Diagram "2/7. ",!#+ '2/5.$ 7()4%"     30%%$ 3%.3/2 %840/7%2 ",!#+ 7()4% "!44%29 2%3)34/2    !,4%2.!4/2 52-AIN0OWER7IRING    467)2% 7()4% U916 and R916 Main Power Wiring Diagram

40. 40 Mechanical Procedures REMOVING THE LOAD RESISTOR: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip 5/16 Nut driver Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS procedure (U916 or R916). Step 2: Using a 5/16 Nutdriver and Phillips screwdriver, remove the hardware attaching the black and white wires of the Load Resistor cable from the tabs of the resistor. See Figure 9a and 9b . Step 3: Using a Phillips screwdriver, remove the two mounting screws attaching the Load Resistor to the frame ( Figure 10a ) and remove the resistor ( Figure 10b ). f igure 9a - Detach resistor wires (U916) f igure 9b - Resistor wires (R916) f igure 10a - Unscrew resistor (U916 shown) f igure 10b - Remove resistor (U916 shown)

42. 42 Mechanical Procedures Step 3: Remove the four mounting screws at the corners of the Power board. See Figure 15 (U916 shown). REMOVING THE POWER INLET CONNECTOR: Tools needed: #0 Phillips screwdriver Wire cutters Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS procedure (U916 or R916). Step 2: Disconnect the cable end of the Inlet connector from J3 on the Power board. See Figure 16 . Step 3: Cut the cable tie from the wire bundle to remove the cable. See Figure 17 . f igure 14b - Power board cables disconnected (R916 shown) f igure 15 - Power board mounting screws f igure 16 - Disconnect inlet connector cable f igure 17 - Cut cable tie

43. 43 Nautilus® Commerical Series Bike Service Manual Mechanical Procedures Step 4: Remove the screw attaching the ground wire to the frame. See Figure 18 . Step 5: Using a #0 Phillips screwdriver, remove the four screws attaching the Power Inlet Connector to the frame and remove the connector. See Figure 19a and 19b . REMOVING THE SPEED SENSOR: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Wire cutters Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS proce - dure (U916 or R916). Step 2: Cut the cable tie from the wire bundle. See Figure 20 . f igure 18 - Remove ground wire screw f igure 19a - Remove mounting screws f igure 19b - Remove power inlet connector f igure 20 - Cut cable tie Power Inlet Connector

55.  Nautilus® Commerical Series Bike Service Manual Cable Connections - U916 Main and HR Cables - Front Mast to Console: If . the . Ferrite . Bead . Housing . is . not . bound . around . the . Main . Console . Wire . and . all . three . Heart . Rate . Wires . (Figure . A), . open . the . bead . and . reconnect . it . around . those . wires . (Figure . B). .. Confirm . that . all . four . wires . are . the . same . length . before . closing . the . bead. .. . Do not include the T v wires. Plug . the . Main . Console . Wire . into . the . large connector . labeled . J5 . on . the . back . of . the . Console. The . Right . Heart . Rate . Wire . is . labeled . with . an . “R”. . Plug . the . Right . Heart . Rate . Wire . into . the . connector . labeled . P1 . on . the . back . of . the . console. Plug . the . Left . Heart . Rate . Wire . into . the . P2 connector. Plug . the . Center . Heart . Rate . Wire . into . the . P3 connector. Gently . push . the . excess . wires . back . down . into . the . mast. no TE: .. If . installing . the . optional . LCD . Monitor . refer . to . the . NV915 . installation . manual . at . this . time. . If . not . installing . the . LCD . Monitor, . wrap . the . end . of . the . TV . Cables . with . electrical . tape . and . tuck . them . into . the . Mast. Back of Console: P1 P2 P3 J5 Main . Console . Wire TV . Cables Right . Heart . Rate . Wire Left . Heart . Rate . Wire CONSOLE . MAST Center . Heart . Rate . Wire Ferrite . Bead . Housing Ferrite . Bead . Housing TV . Cables Ferrite . Bead . Housing Figure A - Heart Rate Wires Not Bound Figure B - Ferrite Bead Housing Reconnected

47. 47 Nautilus® Commerical Series Bike Service Manual Mechanical Procedures f igure 31 - f igure 32 - f igure 33 - REMOVING THE POL y -V WHEEL: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip 3/16 Allen wrench Snap ring pliers Step 1: Remove the Side covers according to REMOVING THE SIDE COVER procedure for the U916 or R916. Step 2: Remove the Alternator Poly-V belt by slowly “walking” the belt off the Poly-V wheel in a clockwise motion. See Figure 31 . Step 3: Using a 3/16 Allen wrench, loosen and remove the four mounting screws. See Figure 32 . Step 4: Remove the Snap ring ( Figure 33 ) and pull off the Poly- V wheel. Snap ring

52.  2 Mechanical Procedures Step 5: Position the right pedal so the cover may be carefully lifted and removed. See Figure 48 . REMOVING THE LEFT AND RIGHT REAR COVERS: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Step 1: Remove the left and right Front covers according to the REMOVING THE LEFT AND RIGHT FRONT COVERS procedure. Step 2: Position yourself on the left side and remove the 13 Phillips screws from the side cover, then carefully lift and remove. See Figure 49a and 49b . Step 3: Position yourself on the right side and remove the three Phillips screws from the side cover, then care - fully lift and remove. See Figure 50 . f igure 48 - f igure 49a - f igure 49b - f igure 50 -

39. 3  Nautilus® Commerical Series Bike Service Manual Mechanical Procedures Step 6: Carefully lift and remove the Mast, allowing clear - ance so that the wires coming out the bottom are not pinched or scraped. See Figure 6a and 6b . REMOVING THE RIGHT AND LEFT PEDALS: Tools needed: 15mm Wrench Step 1: Position yourself on the left side of the bike and place your left hand on the left pedal to stabilize it. Step 2: Using a 15mm Wrench, turn the pedal nut clockwise to loosen and remove the left pedal ( Figure 7 ). Step 3: Position yourself on the right side of the bike and place your right hand on the right pedal to stabilize. Step 4: Using a 15mm Wrench, turn the pedal nut counter- clockwise to loosen and remove the pedal ( Figure 8 ). f igure 5b - Unbolt mast from frame (R916) f igure 6a - Lift mast off frame (U916) f igure 6b - Lift mast off frame (R916) f igure 7 - Loosen left pedal nut f igure 8 - Loosen right pedal nut

35. 3  Nautilus® Commerical Series Bike Service Manual Mechanical Troubleshooting 4 Contents Removing/Replacing . Parts . - . U916 . and . R916 . Common . Parts ...................... 37 . Removing . the . Console .................................................................... 37 . Removing . the . Mast ......................................................................... 38 . Removing . the . Right . and . Left . Pedals ............................................... 39 . Removing . the . Load . Resistor ........................................................... 40 . Removing . the . Battery ..................................................................... 41 . Removing . the . Power . Board ............................................................ 41 . Removing . the . Power . Inlet . Connector ............................................. 42 . Removing . the . Speed . Sensor ........................................................... 43 . Removing . the . Alternator ................................................................. 44 . Removing . the . HTD . Belt ................................................................... 46 . Removing . the . Poly-V . Wheel ........................................................... 47 Removing/Replacing . Parts . - . U916 . Parts ...................................................... 48 . Removing . the . Upper . Handle . Bar .................................................... 48 . Replacing . the . Upper . Right . or . Left . CHR . Plates ............................... 48

50.  0 Mechanical Procedures f igure 41a - f igure 41b - f igure 42 - f igure 43 - REMOVING THE SEAT ASSEMBL y : Step 1: Press and hold the adjustment seat lever, then pull seat upward, straight out of the frame. See Figure 41a and 41b . REMOVING THE SIDE COVERS: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Step 1: Position yourself on the left side of the bike, and remove the 13 phillips screws from the left side cover. See Figure 42 . Step 2: Position the left pedal so the cover may be carefully lifted and removed. See Figure 43 . Step 3: Position yourself on the right side of the bike and remove the two phillips screws from the bottom of the right side cover. Step 4: Position the right pedal so the cover may be carefully lifted and removed.

51.  1 Nautilus® Commerical Series Bike Service Manual Mechanical Procedures R916 Procedures R EMO v IN g THE SIDE CO v ERS REMOVING THE LEFT AND RIGHT FRONT COVERS: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Step 1: Remove the six screws attaching the right and left Mast covers ( Figure 44) . Place the covers to the side. Step 2: Position yourself on the left side of the bike, and remove the eight phillips screws from the left side cover. See Figure 45 . Step 3: Move the Seat Assembly back to the top position on the seat rail. Position the left pedal so the cover may be carefully lifted and removed. See Figure 46 . Step 4: Position yourself on the right side of the bike, and remove the one phillips screw located near the Mast from the right side cover. See Figure 47 . f igure 44 - f igure 45 - f igure 46 - f igure 47 -

20. 20 Once . you . access . the . Error . Log, . you . can . cycle . the . display . through . 8 . entries . by . using . the . up/down . keys. . Each . entry . displays . the . error . label, . its . position . in . the . log . (1-8), . and . the . time . (hours) . the . error . occurred. . Note . that . the . most . recent . error . might . not . be . in . log . position . 1—as . the . number . of . errors . exceeds . 8, . the . newest . error . will . overwrite . the . oldest. . In . addition, . if . a . new . error . is . identical . to . the . log’s . previous . entry, . the . system . checks . the . time. . If . the . time . is . the . same . (within . minutes), . the . error . is . not . logged, . to . help . prevent . redundant . errors. The . only . way . to . reset . the . Error . Log . is . to . reconfigure . the . machine. Machine Configuration Use . Machine . Configuration . to . change . the . machine . type. . The . choices . are: • .... Stepper . • .... StepMill . • .... U/R916 • .... Elliptical In . general, . only . the . U/R916 . machine . type . is . used . for . the . U916 . or . R916. Refer . to . the . following . table . to . scan . through . and . customize . the . settings: Table 2–8. Machine Configuration Step No. Press Keys Display (What you will see) 1 ▲ , 8, E n TER CHANGE MACHINE 2 E n TER U/R916 3 ▼ or ▲ NTM CONFIG RQD, STEPPER CL, STEPMILL, ELLIPTICAL, U/R916 4 E n TER Selects your choice 5 CLEAR SELECT WORKOUT NTM Config RQD . – . resets . the . machine . to . a . “blank” . configuration. .. The . configuration . must . be . set . to . Elliptical . (or . other . machine . type) . for . the . workout . functions . to . operate. Stepper CL . – . configures . the . machine . as . a . cordless . Stepper. .. Please . note . that . there . is . a . sense . line . to . let . the . software . know . if . the . system . is . a . Stepper . PT . (corded); . if . the . system . is . indeed . a . Stepper . PT, . then . Stepper . PT . will . appear . in . the . screen . instead . of . Stepper . CL. Machine Status

33. 33 Nautilus® Commerical Series Bike Service Manual Shut-Down Testing Perform Shut- Down testing One minute after a workout ends, the console should turn off Does the console shut off? No Is external power supplied? Yes No General bike electrical testing It is normal for the 27451 PCB to keep the console powered if externally powered Measure the voltage potential of J5 pin 9 and 10 Yes Is this close to 0V? Yes No Replace the 27451 PCB Replace the console General bike electrical testing

62. 62 Autoranging meters automatically adjust the range to give an accurate reading. This type of meter is more expensive but much easier to use. Switched Range Meter Autoranging Meter Set here to check DC voltage 20 will be the most used setting for measuring DC voltage output Set here to check AC voltage Black (negative) lead always goes here These are for checking amps and are not needed for our purposes Set here to check resistance (ohms) Or here to listen for an audible response (useful when testing a sensor) Set here to check AC or DC voltage Set here to check resistance (ohms) Set here for an audible response Black (negative) lead always goes here The remaining three are for amps settings a ppendix

48. 48 Mechanical Procedures f igure 34 - f igure 35 - f igure 36 - f igure 37 - U916 Procedures REMOVING THE UPPER HANDLEBAR: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip 6 mm Allen wrench Step 1: Remove the console according to R EMOVING THE C ONSOLE procedure. Step 2: Remove the four Allen screws attaching the Handlebar to the frame with a 6mm Allen wrench. See Figure 34 . Step 3: Carefully pull the cables out from the Mast ( Figure 35 ). Step 4: Reverse the steps to install a new Handlebar assembly on the machine. REPLACING THE UPPER RIGHT OR LEFT CHR PLATES: Tools needed: #0 Phillips screwdriver Step 1: Carefully remove the two screws from the rear CHR plate and separate the plates. See Figure 36 . Step 2: Disconnect the black CHR wire from the rear plate and place to the side. See Figure 37 .

49. 4  Nautilus® Commerical Series Bike Service Manual Mechanical Procedures f igure 38 - f igure 39 - f igure 40 - Step 3: Disconnect the cable wire connected to the PC board from the front plate. See Figure 38 . Step 4: Disconnect the red CHR wire from the front plate and place to the side. See Figure 39 . Step 5: Reverse the steps when reinstalling the plates. Note: Be careful not to pinch the cable wires when reattaching the Front and Rear housings. REPLACING THE LOWER T-BAR RIGHT OR LEFT CHR PLATES: Tools needed: #0 Phillips screwdriver Step 1: Carefully remove the two screws from the rear CHR plate and separate the plates. See Figure 40 . Step 2: Disconnect the black CHR wire from the rear plate and place to the side. Step 3: Disconnect the red CHR wire from the top plate and place to the side. Step 4: Reverse the steps when reinstalling the plates. Note: Be careful not to pinch the cable wires when reattaching the Front and Rear housings.

41. 41 Nautilus® Commerical Series Bike Service Manual Mechanical Procedures REMOVING THE BATTER y : Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Wire cutters Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS procedure (U916 and R916). Step 2: Cut the cable tie holding the Battery in place ( Figure 11) . Step 3: Disconnect the black and white Battery cable from the Battery. See Figure 12 . Step 4: Lift and remove the Battery ( Figure 13 ). REMOVING THE POWER BOARD: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS procedure (U916 and R916).” Step 2: Disconnect the attaching cables from Power board. See Figure 14a and 14b . f igure 11 - Cut cable tie f igure 12 - Disconnect battery cable f igure 13 - Remove battery f igure 14a - Disconnect power board cables (U916 shown) Cable tie

25. 2  Nautilus® Commerical Series Bike Service Manual R916 Console Heart Rate Wiring Diagram 40466 RIGHT HANDGRIP 40465 LEFT HANDGRIP 001-6349 (PCBA) "LEVEL (UP) - (DOWN)" "DISPLAY LOCK QUICKSTART" RED FRONT GRIP BLACK REAR GRIP RED FRONT GRIP BLACK REAR GRIP 41703 (CONSOLE) TO BIKE POWER ELECTRONICS AND ALTERNATOR 001-5100 NAUTILUS R916 Console Heart Rate Wiring Diagram 41187 (TELEMETRY SENSOR) 41702 RIGHT LEFT 001-6349 (PCBA) 25473 001-5110 R916 c onsole Heart Rate Wiring Diagram

17. 17 Nautilus® Commerical Series Bike Service Manual Refer . to . the . following . table . to . scan . through . and . customize . the . settings: Table 2–3. Machine Status Step No. Press Keys Display (What you will see) 1 ▲ , 4, ENTER MACHINE STATUS 2 ▼ or ▲ MAINT HOURS, U/R916 [or other], CONS, DISTANCE, WORKOUTS, RUN HOURS 3 cl E a R SELECT WORKOUT Maint Hours . – . displays . the . number . of . hours . (incremented . every . hour) . the . machine . has . been . running. .. The . start . value . is . set . under . the . Maintenance . Logs . service . screen. . (The . start . value . can . be . set . to . any . value—e.g. . if . the . service . tech . had . entered . 100 . in . the . Maintenance . Logs . service . screen . and . there . was . 1 . hour . of . running . time . on . the . machine, . the . value . under . this . Maint . Hours . screen . would . read . 101). Machine Type . – . should . display . U/R916. . “NTM . Config . REQD” . appears . on . the . console . if . the . software . has . been . updated . on . the . machine . or . the . machine . froze . up . and . the . power . had . to . be . cycled. . The . message . also . appears . when . the . console . assembly . has . been . replaced . and . no . configuration . established. . Configuring . the . machine . will . eliminate . this . message . (see . the . table . “Machine . Configuration”). Distance . – . displays . the . total . distance . in . miles . (or . kilometers) . of . machine . operation. .. This . value . is . auto-incremented . every . 1/100th . or . 1/10th . unit, . depending . on . how . many . miles/km . have . accrued. Workouts . – . displays . the . total . number . of . workouts . performed . on . the . machine. .. This . value . is . auto-incremented . only . if . the . user . enters . a . workout . and . either . completes . the . workout . or . presses . the . [ S TOP ] . key . twice. Run Hours . – . displays . the . total . number . of . hours . on . the . machine. n o TE : .. The . R&D . options . (codes . starting . with . 5) . are . not . used . for . servicing . machines. . Do . not . change . these . settings. . If . an . R&D . setting . is . inadvertently . changed, . it . will . reset . when . the . machine . is . powered . off . and . then . back . on. Diagnostics Use . diagnostic . codes . to . test . various . components . of . the . machine . such . as . the: • . tachometer . • . alternator • . I/O • . sensor . (for . EV9.16 . only) • . serial . ports • . keypad . • . display Diagnostics

15. 1  Nautilus® Commerical Series Bike Service Manual Overview To . enter . a . Service . Mode, . the . unit . must . be . in . IDLE . DISPLAY . state . or . an . ERROR. . The . service . screens . cannot . be . entered . during . a . workout, . paused . or . in . a . WARNING . state. . (If . the . unit . is . in . a . Warning . state, . you . must . press . [CLEAR] . before . entering . the . Service . Modes.) . To . access . the . console . codes, . press . the . Level . Up . button . ( ▲ ), . the . group . number . code, . and . [ E NTER ]. . Then . use . the . arrow . buttons . to . scroll . through . the . menu . options . for . each . group. . The . procedures . are . outlined . in . the . tables . below. There . are . six . groups . of . Service . Mode . console . codes: . Defaults . (codes . starting . with . 2), . Customize . (codes . starting . with . 3), . Machine . Status . (codes . starting . with . 4), . Diagnostics . (codes . starting . with . 6), . Maintenance . Logs . (codes . starting . with . 7), . and . Change . Machine . (codes . starting . with . 8). . Each . group . of . codes . is . defined . below. . Defaults You . can . customize . several . workout . parameters . on . the . R916/U916 . Bike . with . default . values . to . conform . to . your . individual . requirements, . including: • . % . target . heartrate . (10-90%) . • .. age . (10-99) . • .. workout . time . (5-99 . min) . • .. workout . level . (1-20) • .. weight . (50-400 . lbs. . or . 25-180 . kg) Refer . to . the . following . table . to . scan . through . and . customize . the . settings: . Table 2–1. Defaults Step n o. Press Keys Display (What you will see) 1 ▲ , 2, E n TER DEFAULTS 2 ▼ or ▲ CHR PERCENT, AGE, TIME, LEVEL, WEIGHT 3 E n TER Selected choice 4 ▼ or ▲ (or numeric keypad) Default value changes 5 E n TER DEFAULTS 6 CLEAR SELECT WORKOUT Customize You . can . customize . several . console . settings . on . the . R916/U916 . Bike . with . default . values . to . conform . to . your . individual . requirements, . including: • . resetting . all . configurable . settings . to . factory . defaults . (see . below) • .. adjusting . lower . screen . contrast . (0-15) . • .. adjusting . upper . screen . contrast . (0-15) . • .. console . language . • .. choosing . type . of . heartrate . inputs . (description . below) Customization

30. 30 Alternator Testing To minimize the complexity of the flowchart, this section will best be described in terms of system theory. The colored connections to the alternator are as follows: White-B+ — Alternator output voltage Brown-Field — Alternator Control Current Black-Ground — Alternator return Prior to proceeding with tests below, perform continuity checks on the alternator cable, and confirm cable is securely fastened to the alternator and the 27451 PCB. For workouts that require levels of less than 50W resistance to the user, clinical mode must be used. In this condition, the console is powered by an external power supply, and the alternator is not powered unless the user decides to achieve levels of 50W or more. If the bike’s speed is 40 RPM or greater, and assuming clinical mode is not desired, the system can subject the user to a workout that is self-generating. Under self-generating conditions, the alternator is on; it is powering itself, the console, and providing charge to the battery. Prior to entering workout information, it is desired to have the user subjected to minimal resistance, and the console is powered by the battery. Once the console knows all the user’s desired information, it turns on the alternator. The alternator is turned on by a logic low on pin 2 of J5 of the 27451 PCB. This signal is also accessible on the 27451’s TP11. Once the alternator is powered, the user sees an increase in resistance due to the alternator’s internal magnetic fields. The 27451 PCB maintains a regulated voltage on the alternator’s B+ by varying the amount of current sourced into the alternator’s field. B+ is sensed by the 27451, and the field current is altered until the alternator is at the desired voltage. As the RPM increases, the alternator’s efficiency increases, and less field current is required. Depending on the desired resistance level, the console can control the alternator’s output voltage by controlling the logic level of pin 7 of J5 on the 27451 PCB. A logic low on pin 7 tells the 27451 to control at 7.8V or a logic high sets 9.8V. If the alternator is not powering on, first confirm the bike is cranked at ~50 RPM, and that pin 2 of J5 (TP 11) is NOT high. If it is, and a workout has been entered, suspect the console. If pin 2 of J5 is low, measure the alternator’s field voltage. Without B+ the 27451 will attempt to force full current into the field, and in this condition it will be limited by its input voltage, or the battery in this case. Therefore, if 5V or more is measured on the field with no B+, either B+ is shorted or the alternator is defective. Before replacing the alternator, disconnect the B+ wires from the alternator’s B+ terminal and see if an output voltage exists. If voltage is now present, which could easily exceed 30V in an uncon - trolled state, the 27451 PCB is probably defective. With no load on B+, 5V or more field current, adequate RPM and no B+, replace the alternator. If no field voltage is detected, disconnect the B+ connections on the alternator, along with the field wire. Measure the field resistance to alternator ground, which should be approximately 4 ohms which is a typical value of Prestolite units. If the field resistance is way less than this or shorted, replace the alternator. If the field measures ~4 ohms, take a jumper wire, and make a connection from the positive battery terminal to the alternator’s field tab. If the voltage now jumps up to a level of 20 to 30V the alternator is good, and the 27451 needs replacing. If the B+ voltage is sporadic first look for loose connections. This type of problem could be caused by a defective alternator or 27451. If a known-good 27451 unit is available it will be the easiest component to replace. If the problem goes away, confirm the other PCB still causes sporadic behavior, and the problem was not in fact a loose connection.

38. 38 Mechanical Procedures Step 5: Install the Console to the Mast using the four Phil - lips screws that you removed in Step 1. See Figure 1a and 1b . REMOVING THE MAST: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip 6 mm Allen wrench 8 mm Allen wrench Step 1: Remove the console according to the REMOVING THE CONSOLE procedure. Step 2: For the U916 only – Remove the Upright Handlebar according to REMOVING THE UPPER HANDLE BAR procedure. Step 3: Remove the right and left Mast covers with a phil - lips screw driver. See Figure 3a and 3b . Step 4: For the U916 only – Remove the Cupholder from the Mast with a phillips screwdriver (see Figure 4 ). Step 5: Using a 8mm Allen wrench, remove the four bolts securing the Mast to the bottom half frame. See Figure 5a and 5b . f igure 3a - Remove right mast cover f igure 3b - Remove left mast cover f igure 4 - Remove cupholder (U916 only) f igure 5a - Unbolt mast from frame (U916)

60. 60 Required Tools This . is . a . list . of . the . most . common . tools . you . will . need . to . service . the . R916 . and . U916 . Bikes. Table A–1. Required Tools and Uses Tool Purposes Socket wrench General #0 Phillips screwdriver General #2 Phillips screwdriver General Cordless drill w/bit General Rachet General Wire cutters General 15mm Pedal Wrench Removing Pedals 8mm Allen Wrench Removing/Installing crank bolts ISIS Crank puller Removing Crank Arms 17mm and 19mm open end wrench Adjusting timing belt tension Impact cordless drill Flywheel 3/16 Allen Poly-V wheel 5/16 Nut driver Resistor cable 9/16 socket Alternator Snap Ring Pliers Intermediate Hub 5mm Allen Wrench Intermediate Pulley 6mm Allen Wrench Removing/Installing Handlebars Multimeter Electrical troubleshooting a ppendix

63. 63 Nautilus® Commerical Series Bike Service Manual Checking Resistance Use this procedure to check for broken wires: 1 Set the multimeter to the lowest OHMs (resistance) range. 2 Attach the test leads on both ends of the wire being tested. 3 Observe the reading. • A short circuit will read less than approximately 3 ohms. This is the correct reading for an undamaged wire. • An open circuit will usually read infinite; on a digital meter it will have an error code. This signals a broken or cut wire. Use this procedure to test for crossed wires. In most circumstances all indivudual wires in a cable will be insulated from each other. When a wire is pinched, it becomes short circuited to an adjacent wire. This can cause problems resulting in blown fuses or fried components. 1 Set the multimeter to the lowest OHMs (resistance) range. 2 Attach one test lead of the multimeter to one wire and check all adjacent wires. This can all be done at one end of the cable. However, the other end of the cable must be disconnected from the circuit board. All wires should be insulated from each other and therefore test open. 3 Observe the reading. Checking v oltage Use this procedure to check voltage output: 1 Determine whether the voltage is AC or DC voltage, and choose the appropriate setting on the multimeter. 2 Set the multitmeter to the lowest setting that is still higher than the highest output of the component being tested. 3 Place the black and red leads or probes on the appropriate corresponding wires, pins, or connectors. 4 Observe the reading, and proceed according to the troubleshooting sections in this manual. a ppendix

61. 61 Nautilus® Commerical Series Bike Service Manual a ppendix Using a Multimeter How to Use a Multimeter This is a basic overview of mutlimeters. For in depth directions, please use the manual provided with your multimeter. What Does a Multimeter Do? A multimeter combines the functions of three instruments: ammeter (measures current), voltmeter (measures voltage), and ohmmeter (measures resistance). Electronic signals are usually thought of in terms of voltage. For that reason, and because it is an easier measurement to take, we will use the volts setting. We will not want to use the ammeter setting to troubleshoot fitness equipment. The ohmmeter setting is used to determine whether there is an open circuit (a bad connection or break in the wires) or a short circuit (two wires that normally would not come in contact with each other have been pinched together or crossed in some way). Ohmmeters work by passing a small current through the wire or component and measuring the voltage produced. Type of Multimeters Multimeters are available in digital and analog models. Digital meters give an output in numbers usually on a LCD. Analog meters move a needle along a scale. We recommend using a digital meter. While analog meters can be very cheap, they are difficult for beginner to read accurately, especially on resistance scales. Also, the components are delicate and easily damaged. Settings For the beginner the multimeter can be intimidating because of the range of settings available. The diagrams on the next page show what settings to use when checking voltage and resistance on the fitness equipment. Perhaps more importantly, it shows which settings are not needed. There are two types of digital multimeters commonly available: • switched range and • autoranging. Switched range meters require you to choose the appropriate position from the many choices available on the dial. For example, if the dial is switched to 20VDC, 20 volts is the maximum voltage that can be measured. This is important when you want to read small increments in voltage accurately. For example, if the required voltage is 13.5 volts and the meter is set too high, you may only see 13 volts on the readout. Setting the meter to a lower maximum will show 13.5 volts.

37. 37 Nautilus® Commerical Series Bike Service Manual Mechanical Procedures U916 and R916 Procedures REMOVING THE CONSOLE: Tools needed: • Phillips screwdriver or Cordless drill with Phillips tip Step 1: Remove the four Phillips screws attaching the Console to the Mast. See Figure 1a and 1b . Set the screws aside for Step 5. Step 2: Tilt the console forward and disconnect all the cables from the Mast to the PC board connectors ( Figure 2 ). Note: Make note of each cable and the location of its connector on the PC board. Step 3: Remove the Console. Step 4: To replace the Console, position the Console at the top of the Mast so that you can connect the cables to the PC board ( Figure 2 ). For specific connector locations, refer to the CABLE CONNECTIONS segment later in this section. This section of the Service Manual provides instructions for removing and replacing parts of the U916 and R916 bikes. The first segment contains procedures that apply to both bike models. The second segment contains instructions specific to the U916 bike, and the third contains instructions specific to the R916 bike. The fourth segment focuses on the cable connections for the U916 and R916 bikes. For part number information, please refer to the separate documents for warranty parts lists and exploded drawings. f igure 1a - U916 console f igure 1b - R916 console f igure 2 - Cable connections in back of Console (R916 console shown)

24. 24 U916 Console Heart Rate Wiring Diagram "LEVEL (UP) - (DOWN)" "DISPLAY LOCK QUICKSTART" GREEN BLACK RED WHITE RED FRONT GRIP BLACK REAR GRIP RED FRONT GRIP BLACK REAR GRIP 41700 (CONSOLE) 40679 001-5378 001-5378 NAUTILUS FIXED "T-BAR" CONTACT HEART RATE GRIPS 41702 RIGHT LEFT TO BIKE POWER ELECTRONICS AND ALTERNATOR 25473 41187 (TELEMETRY SENSOR) 40466 RIGHT HANDGRIP 40465 LEFT HANDGRIP 001-6349 (PCBA) 001-6349 (PCBA) U916 Console Heart Rate Wiring Diagram U916 c onsole Heart Rate Wiring Diagram

18. 18 Refer . to . the . following . table . to . scan . through . the . diagnostic . tests . and . view . diagnostic . information: Table 2–4. Diagnostics Step No. Press Keys Display (What you will see) 1 ▲ , 6, ENTER DIAGNOSTICS 2 ▼ or ▲ TACH TEST, ALT TEST, I/O TEST, A SENSOR B, SERIAL PORTS, KEY TEST, DISPLAY TEST 3 ENTER Selected choice 4 cl E a R DIAGNOSTICS 5 cl E a R SELECT WORKOUT Tach Test . – . performs . a . tachometer . test. . On . the . left . hand . side . of . the . display . the . target . rate . of . 2000 . rpm . is . displayed. .. On . the . right . hand . side . of . the . display . the . actual . rpm . is . displayed. . If . the . actual . rpm . is . above . the . target . rate, . then . the . alternator . field . turns . on . (the . level . increases). . If . the . actual . rpm . is . below . the . target . rate, . then . the . alternator . field . shuts . off . (the . level . decreases). Alt Test . – . performs . an . alternator . test. . By . pressing . the . level . up . key, . the . alternator . field . will . turn . on . and . the . steps . will . become . harder . to . rotate. . By . pressing . the . level . down . key, . the . alternator . field . will . turn . off . and . the . steps . will . become . easier . to . rotate. I/O Test . – . The . AUX . and . B+ . values . represent . the . current . and . voltage . delivered . from . the . alternator . respectively. .. AUX . is . scaled . by . 1000 . and . B+ . is . scaled . by . 300. . These . values . will . increase . with . the . speed . of . the . alternator . (note . that . both . values . will . reach . 0 . if . the . alternator . is . left . at . rest). . The . “---” . string . is . displayed . at . all . times . since . the . bikes . do . not . require . a . magnetic . key. A Sensor B . – . is . used . only . on . the . ellipticals. . The . A . Sensor . B . diagnostic . screen . ensures . the . optical . detector . is . functional. . The . A . value . is . displayed . on . the . left . hand . side . of . the . upper . display . (B . is . not . used . on . the . EV9.16). . Under . normal . conditions, . the . A . value . should . toggle . between . the . “0” . and . “1”. Serial Ports . - . tests . the . serial . ports . (UARTS) . for . proper . functionality. .. The . tech . can . choose . from . either . the . CSAFE-1 . Loopback . or . TM . Loopback . tests. .. Both . of . these . tests . result . in . PASS . or . FAIL. .. Please . note . that . a . null . modem . must . be . used . to . perform . these . tests. . Key Test . - . tests . all . of . the . user . interface . keys. . Once . a . key . is . pressed, . its . value . will . show . up . on . the . display . screen. . After . all . keys . have . been . pressed . and . are . functional, . a . PASS . message . appears . on . the . display. Display Test . - . will . test . all . segments . on . both . the . top . and . bottom . displays. Maintenance Logs The . MAINTENANCE . LOGS . settings . allow . you . to . view . the . quality . assurance . data, . the . machine’s . error . log, . and . reset . the . time . between . service . and . maintenance . calls. . Maintenance Logs

44. 44 Mechanical Procedures Step 3: Disconnect the cable end of the Speed Sensor from J2 on the Power board and remove the wire from the bundle. See Figure 21 . Step 4: Loosen the adjustment screw and remove the Speed Sensor from the Alternator ( Figure 22 ). Note: Early model Speed Sensors are tightened with a screw adjustment. Later models are tightened with a nut and bolt. When you (re)place the sensor on the Alterna - tor, be sure the gap between the fan blade and the Sensor is .020 - .040. REMOVING THE ALTERNATOR: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip Wire cutters Impact cordless wrench 15/16” socket and ratchet 6mm Allen wrench 8mm Allen wrench 9/16” socket Step 1: Remove the right and left side covers according to the appropriate REMOVING THE SIDE COVERS procedure (U916 or R916). Step 2: Remove all the attached cables from the Alternator, then detach the Speed Sensor from the Power board. See Figure 23 . Note: Make note of where and how the cables are attached to the Alternator. f igure 21 - Disconnect speed sensor cable f igure 22 - Loosen adjustment screw f igure 23 - Detach all cables from alternator f igure 24 - Remove flywheel

46. 46 Mechanical Procedures Step 7: Remove the Speed Sensor from the old Alternator ac - cording to the R EMOVING THE S PEED S ENSOR proce - dure, and install the Speed Sensor on the new Alterna - tor. See Figure 28 . Note: When placing the sensor on the Alternator, be sure the spacing between fan blade and the Sen - sor is .020 - .040 REMOVING THE HTD BELT: Tools needed: Phillips screwdriver or Cordless drill with Phillips tip 17mm Wrench 19mm Wrench Step 1: Remove the Side covers according to the appropriate REMOVING THE SIDE COVER procedure (U916 or R916). Step 2: Using a 17mm wrench and 19mm wrench, loosen the belt tensioner and slide upward along the slotted cut-out. Note: Do not completely remove the screw. See Figure 29a and 29b . Step 3: Remove the belt and place a new one on ( Figure 30 ). f igure 28 - f igure 29a - Loosen belt tensioner f igure 29b - Belt tensioner f igure 30 - Replace HTD Belt Belt tensioner Slotted cutout

16. 16 • .. change . units . (USA . units . or . metric . units) • .. cooldown . time . (1-10 . min) • .. maximum . time . limit . (10-99 . min . or . OFF) Refer . to . the . following . table . to . scan . through . and . customize . the . settings: . Table 2–2. Customize Step No. Press Keys Display (What you will see) 1 ▲ , 3, ENTER CUSTOMIZE 2 ▼ or ▲ SET DEFAULTS, CONTRAST ADJ LOWER, CONTRAST ADJ UPPER, LANGUAGE, SELECT STATS*, HR INPUTS, CHANGE UNITS, COOL DOWN, MAX TIME LIMIT 3 ENTER Selected choice 4 ▼ or ▲ (or numeeric keypad) Default value changes 5 ENTER CUSTOMIZE 6 cl E a R SELECT WORKOUT *The . S ELECT. S TATS . menu . display . option . is . not . active . for . the .. R916 . and . U916. Set Defaults . – . resets . the . machine . to . the . factory . defaults . for . all . configurable . values. .. Please . note . that . selecting . this . option . will . require . the . machine . to . be . reconfigured . (see . Change . Machine . section). no TE: .. All . error . and . history . counter . data . (Maint . Hours, . Distance, . Workouts, . Run . Hours, . Error . Log, . and . QA . ID . Number) . will . be . lost . if . Set . Defaults . is . selected. . HR Inputs . – . enables . the . various . heart . rate . inputs . that . can . be . used. .. Heart . rate . configurations . include: . Locked . Inputs . (both . heart . rate . monitors . are . read . until . it . detects . a . valid . signal . to . lock . on, . at . which . point . the . other . HR . inputs . are . ignored), . HAND . HR . PRGM . OFF, . Both . HR . OFF, . Hand . Only, . Telemetry . Only, . and . Either . Input . (if . one . input . is . lost, . then . the . other . input . may . become . active). Change Units . - . changes . all . displayed . data . (service . information . and . user . data) . to . the . selected . units. . Units . are: . Miles . or . Kilometers, . MilesPerHour . or . KilometersPerHour, . Pounds . (LB) . or . Kilograms . (KG), . MinutesPerMile . or . MinutesPerKM. Machine Status Use . the . machine . status . codes . to . view . maintenance . information . such . as: • . maintenance . hours . • .. machine . type . (U/R916) • .. console . software . version . • .. distance . traveled . • .. number . of . workouts • .. machine . run-time . hours Machine Status

65. 6  Nautilus® Commerical Series Bike Service Manual Limited Warranty Commercial Market Warranty Information All Nautilus ® exercise products are warranted to the commercial market purchaser to be free from defects in materials and workmanship. Warranty coverage valid to the original purchaser only and proof of the purchase will be required. Any product sold or placed in an application not recommended by Nautilus will void any warranty coverage set forth by Nautilus warranty policies and procedures. Time Period 15 y ears - Frame 3 y ears- Mechanical and electrical parts 1 y ear- Labor 1 y ear - Wear items Warranty terms may differ outside the USA. What this warranty does not cover 1. Users weighing more than 400 lbs (182 kg). 2. Any damage, failure or loss caused by accident, misuse, neglect, abuse, improper assembly, improper maintenance or failure follow instructions or warnings in Owner’s Manual. 3. Use of product in a manner or environment for which it was not designed. Limitation s The foregoing warranties are in lieu of and exclude all other warranties not expressly set forth herein, whether expressed or implied by operation of law or otherwise, including, but not limited to, warranties of merchantability or fitness for a particular purpose. Nautilus shall in no event be liable for incidental or consequential losses, damages or expenses in connection with its exercise products. Nautilus’ liability hereunder is expressly limited to the replacement of goods not complying with this warranty or, at Nautilus’ election, to the replacement amount of the purchase price of the exercise product in question. Some states do not permit the exclusion or limitation of implied warranties or incidental or consequential damages, so the preceding limitations and exclusions may not apply to you. Procedures Warranty service will in most cases be performed by an authorized Nautilus Fitness Dealer or Service Technician. The original purchaser must provide proof of purchase, Service calls and/or transportation to and from the Nautilus Dealer is the responsibility of the purchaser. 1. Nautilus will have the option to repair or replace any exercise product, which requires service. 2. Nautilus will replace any equipment frame that is structurally defective with a new frame or replace the unit with a unit of equal value. 3. Nautilus is not responsible for dealer labor charges for the component changeovers completed after the labor related warranty period stated herein. 4. If you elect to repair an exercise product or part yourself, using the services of someone other than an authorized Nautilus Fitness Dealer or Service Technician, or use a replacement part not supplied by Nautilus, Nautilus shall not be liable for any cost, damage, failure or loss caused by the use of such unauthorized service or parts.

6. 6 safety requirements I MP o RTA n T S A f ET y Info RMATI on: . SAVE THESE INSTRUCTIONS The . following . definition . applies . to . the . word . “Warning” . found . throughout . this . guide: . . - ... Indicates . a . potentially . hazardous . situation . which, . if . not . avoided, . could . result . in . death . or . serious . injury. . This symbol appearing T hroughou T T his manual means p ay aTT en T ion! b e aler T ! y our safe T y is involved! 7!2.).' !4 4%.4)/. $!.'%2 )--%$)!4%!#4)/.2%15)2%$ #!54)/. 1. Read, understand and carefully follow all warnings, instructions and procedures in this manual. Failure to do so can produce a serious electrical shock hazard or other serious injury. 2. The external power supply should always be unplugged from the AC wall outlet before removing or installing parts. Never make adjustments or repairs while an exercise program is in progress. 3. Close supervision is necessary whenever the machine is being used or serviced whenever children, invalids, or disabled persons are in the vicinity. 4. Keep hands away from all moving parts. Keep feet on the pedals while exercising or testing the machine. 5. Do not operate the machine with the side covers removed, or outdoors. 6. Use this machine only for its intended use as described in this Manual. Do not use parts, at tachments, or accessories other than those provided by Nautilus, Inc. 7. Do not use the external power supply if it has a damaged cord or plug, it is not working properly, if it has been dropped or damaged, or dropped in water. Contact our Technical Service Department to arrange for the return of damaged parts. 8. To avoid potential safety and electrical problems, replace with manufacturer’s specified parts only. 9. Connect the external power supply to a properly grounded AC wall outlet. 10. Keep all cords away from heated surfaces. 11. To disconnect the external power supply, remove the plug from the AC wall outlet. 12. Do not let liquid enter the console. If liquid does enter the console, the console must be inspected and tested for safety by an approved technician before it can be used again. 13. Never drop or insert any object into any opening on the machine. 14. Keep the area underneath and around the machine clear. 15. Do not operate where aerosol (spray) products are being used. 16. Always wear insulated gloves when handling bat teries. 17. Do not crush, incinerate, or dismantle the bat tery. 18. The safety level provided by the design of this equipment can only be maintained when the equipment is regularly examined for damage and wear. Inoperable components should be replaced immediately or the equipment be put out of use until it is repaired. 19. Failure to follow the guidelines may compromise the effectiveness of the exercise experience, expose you (and possibly others) to injury, and reduce the longevity of the machine. Follow all training instructions listed in the manual and /or on the machine. Failure to follow the conditions set forth below shall limit, to the extent allowed by law, Nautilus, Inc. responsibility for the safety, reliability, and performance of this equipment. • The operator manual must be read in full by each owner and trainer before the product is first used. Each user must be instructed in the proper use of the bike and its accessories. • The equipment must be used in accordance with the instructions for use. • Only Nautilus-trained or Nautilus-authorized personnel should carry out assembly operations, extensions, readjustments, modifications, or repairs. • For further information or instruction on use, maintenance or specifications, please contact your Authorized Nautilus Fitness Dealer or Service Technician. T HE ELECTROL y TE CONTAINS SULFURIC ACID , WHICH CAN CAUSE SERIOUS DAMAGE TO E y ES AND SKIN . S HOULD THIS OCCUR , FLUSH PROFUSEL y WITH WATER AND SEEK MEDICAL AT TENTION . 7!2.).' !4 4%.4)/. $!.'%2 )--%$)!4%!#4)/.2%15)2%$ #!54)/.

32. 32 Load Resistor Testing Load Resistor Testing Remove plastic shrouds so electronics can be observed Measure resistance from the 27451's J6 pin 3 to the alternator's B+ terminal Have a helper pedal the bike in elevated resistance workout levels Is the resistance .33 +/- 3%? Yes No Is voltage present? Yes Measure the voltage potential on the resistor terminals General bike electrical testing Resolve any loose connections, and replace the resistor cable or the resistor is opened Is the resistance high? Yes No Is the resistance low? Yes Resolve any shorted connections in the resistor cable or resistor Replace the console No Measure the voltage potential on J5 pin 4 Is voltage less than 5V? Yes No Replace the 27451 PCB General bike electrical testing

5.  Nautilus® Commerical Series Bike Service Manual product specifications U916 Upright Bike R916 Recumbent Bike Physical Length 45 in. (114.3 cm) 67 in (170.18 cm) Width 24 in. (60.96 cm) 24 in. (60.96 cm) Height 57 in. (144.78 cm) 46 in. ( 116.84 cm) Workout Area 50” W x 81” L (127 cm x 205.74 cm) 50” W x 103” L (127 cm x 261.62 cm) Unit Weight 150 lb. (68 kg) 180 lbs (82 kg) Shipping Package Weight 178 lb. (81 kg) 231 lbs (105 kg) Max User Weight Supported 400 lb. (182 kg) 400 lb. (182 kg) Belt(s) Two: Poly-V (6V) self-tensioning belt and timing belt Electrical Power Cordless; or 108-132VAC 60 Hz, or 220-240VAC 50 Hz, 20 watts maximum (operation with charger connected) Battery Type 6VDC sealed lead-acid Battery Charge Time 8 hours to full charge, starting with discharged battery Display C51 blue/white LCD with backlight. Tactile membrane keypanel Functionality Number of Functions Eleven: Heart rate, elapsed time, calories burned, calories burned per hour, watts, METS, resistance level, rpm, speed, distance, and workout profile Heart Rate Monitoring Integrated heat rate monitoring system with polar-compatible wireless and contact HR Workout Programs Eleven: Quick Start, Manual, Fat Burner, Calorie Burner, Intervals, HR Zone Trainer, multi-stage Fit Test. Calorie Goal, HR Intervals, Random Play, Custom Intervals Resistance Range Twenty: 20 watts (level 1, 20 rpm) to 500 watts (level 20, 80 rpm) Language Options English, German, French, Spanish, Italian, Dutch, Portuguese C-Safe Compatible Level 2 compatible. Owner/manager will be able to customize console. Environmental Operating Temperature 50–90 o F (10–32 o C) Storage Temperature -25–50 o C Operating Humidity (non- condensing) 3–95% relative humidity Storage Humidty (non- condensing) 3–95% relative humidity

28. 28 Contact Heart Rate Testing Contact Heart Rate Testing Turn on console, by either pedaling bike, or installing external power supply Using volt meter, measure voltage potential on ALL Contact Heart Rate plates When performing measurement, confirm positive lead is on top plate (users' palm) Is a voltage of about 2V measured? Yes No Is the voltage positive? Yes Remove the screws securing the Contact Heart Rate plates Remove 4 screws holding console to mast While noting locations, carefully unplug the suspect Contact Heart Rate cable Using OHM Meter, perform continuity check on cable, using wire colors as a guide Is continuity OK? Yes No Replace Contact Heart Rate cable Replace console Remove the screws securing the Contact Heart Rate plates Reverse the polarity of the plates' wires. Red should be on top, black on bottom Have you had success previously with Contact Heart Rate Systems? * Yes No Perform Contact Heart Rate Testing * Contact Heart Systems perform properly on roughly 87% of the popul ation, according to latest data from Salutron. Many factor s affect the pulse strength at the user's palms. No General bike electrical testing

26. 26 General Bike Electronics Troubleshooting With external power removed, pedal the bike at 25RPM or greater Does the console turn on? Yes No Is battery in a charged state? Yes No Using external power supply, charge battery for 8 hours Remove plastic shrouds so electronics can be observed Hold both Contact Heart Rate grips firmly On the 27451 PCB, measure the voltage on J1 pins 2 and 3 Is battery voltage 6V or greater? Yes No Perform general bike electrical testing Have a helper pedal bike at 25 RPM or greater Perform Battery Charge Testing On the 27451 PCB, measure the voltage on J5 pins 1 and 10 Is voltage here 6V or greater? Yes No Perform Start-Up Circuit Testing 2 Does a heart symbol appear Yes No In 10S or less, does the heart beat? Yes No Perform Contact Heart Rate Testing This section applies to both Contact Heart Rate and Telemetry sensing On the console, press "Quick Start" to enter a manual workout Is an increase in resistance felt? Yes No Perform Alternator Testing 3

19. 1  Nautilus® Commerical Series Bike Service Manual Refer . to . the . following . table . to . scan . through . the . Maintenance . Logs . tests . and . view . diagnostic . information: Table 2–5. Maintenance Logs Step No. Press Keys Display (What you will see) 1 ▲ , 7, ENTER MAINTENANCE LOGS 2 ▼ or ▲ QA ID NUMBER*, MAINT HOURS, ERROR LOG 3 ENTER Selected choice 4 cl E a R after viewing (or reset) MAINTENANCE LOGS 5 cl E a R SELECT WORKOUT * . The . QA . ID . NUMBER . option . is . not . used . for . servicing . machines . in . the . field. The . following . tables . provide . the . steps . for . resetting . the . time . between . service . or . maintenance . calls, . and . for . viewing . the . error . log: Table 2–6. Reset Maintenance Hours Step No. Press Keys Display (What you will see) 1 ▲ , 7, ENTER MAINTENANCE LOGS 2 ▼ , ▼ MAINT HOURS 3 ENTER MAINT HOURS #### 4 cl E a R to exit after viewing, or 0, ENTER to reset MAINTENANCE LOGS 5 cl E a R SELECT WORKOUT Maint Hours . – . lets . the . service . technician . enter . a . value . representing . the . maintenance . hours. Table 2–7. Error Log Step No. Press Keys Display (What you will see) 1 ▲ , 7, ENTER MAINTENANCE LOGS 2 ▼ , ▼ , ▼ ERROR LOG 3 ENTER NO ERROR or the highest priority error 4 ▼ or ▲ Scrolls through the error log list 5 cl E a R SELECT WORKOUT Error Log . – . displays . fatal . errors . accrued . on . the . system. . The . log . holds . up . to . 8 . error . entries. . Errors . are . handled . in . two . ways: n . First, . as . a . non-fatal . Warning, . which . will . display . the . error . response . text . but . continue . system . operation . until . you . press . the . [ C LEAR ] . key. . Warnings . are . not . logged . in . the . Error . Log. n . The . second . way . is . a . fatal . Error, . which . will . stop . the . exercise . and . return . the . system . to . an . idle . intensity . state. . The . console . will . display . the . error . response . and . a . number . showing . how . many . errors . were . logged . during . the . specific . event. . (Some . errors . trigger . multiple . responses). . To . view . the . non-displayed . errors, . access . the . Error . Log. . The . unit . will . not . let . you . restart . the . program . unless . power . has . been . turned . off . and . then . back . on. Maintenance Logs

31. 31 Nautilus® Commerical Series Bike Service Manual Start-Up Circuit Testing Start-Up Circuit Testing Connect external power supply Does Console turn on? Yes No Unplug external power supply Confirm the magnetic pick-up on the alternator is mounted such that its face is parallel and within 1mm of every fin on the speed disk Adjustment required? Yes No Tighten magnetic pick-up securely, and confirm the sensor is free of contact from the sensor Using the Battery Charge Testing section as a reference, confirm operation of external power supply and external power cable 9V +/- 10% measured on TP1? Yes No ~8V measured on J5 #1? Yes No Replace 27451 PCB General bike electrical testing Perform continuity check on main interface cable, pins 1 and 10 Continuity OK? Yes No Replace console Replace or repair main interface cable General bike electrical testing Unplug the speed sensor from the 27451 at J2 Have a helper pedal bike at 25 RPM or greater while measuring the AC voltage on J2 pins 1 and 2 Voltage measure 4VAC or more? Yes No Replace 27451 PCB Replace the magnetic pick-up

67. 67 Nautilus® Commerical Series Bike Service Manual i mportant contact numbers If you need assistance, please have both the serial number of your machine and the date of purchase available when you contact the appropriate Nautilus office listed below. © 2007. Nautilus, Inc. All Rights Reserved. Nautilus, the Nautilus Logo, ROC, Remote Operation Control, Be Strong, StairMaster and StepMill are either registered trademarks or trademarks of Nautilus, Inc. All others are trademarks of their respective company. W o RLDWIDE CUST o MER SER v ICE • no RTH AMERICA off ICE Nautilus, Inc. World Headquarters 16400 S.E. Nautilus Drive Vancouver, Washington, USA 98683 Phone: 800-NAUTILUS (628-8458) Fax: 800-686-6466 e-mail: cstech @ nautilus.com • C o RP o RATE HEADQUARTERS Nautilus, Inc. World Headquarters 16400 S.E. Nautilus Drive Vancouver, Washington, USA 98683 Phone: 800-NAUTILUS • CA n ADA off ICE Nautilus Fitness Canada, Inc. 925 Keewatin Street Winnipeg, MB, Canada R2X 2X4 Phone: 866-381-5996 Fax: 800-532-6934 e-mail: nfcpartsandservice @ nautilus.com I n TER n ATI on AL CUST o MER SER v ICE • I n TER n ATI on AL off ICE Nautilus International S.A. Rue Jean Prouvé 6 1762 Givisiez / Switzerland Tel: +41-26-460-77-77 Fax: +41-26-460-77-70 E-mail: technics @ nautilus.com INTERNATIONAL OFFICES: • SWITZERLA n D off ICE Nautilus Switzerland S.A. Tel: +41-26-460-77-66 Fax: +41-26-460-77-60 • GERMA ny and AUSTRIA off ICE Nautilus GmbH Tel: +49-2203-2020-0 Fax: +49-2203-2020-45 • ITAL y off ICE Nautilus Italy s.r.l. Tel: +39-51-664-62-01 Fax: +39-51-664-74-61 • U n ITED KI n GD o M off ICE Nautilus UK Ltd. Tel: +44-1908-267-345 Fax: +44-1908-267-346 • CHI n A off ICE Nautilus Representative Office Tel: +86-21-523-707-00 Fax: +86-21-523-707-09

29. 2  Nautilus® Commerical Series Bike Service Manual Battery Charge Testing Battery Charge Testing Due to requiring many pieces of test equipm ent, this procedure does not test the complete functionality of the charger but rath er its final "float" state. If the battery voltage is less than 3V, no more than 50mA is applied. From 3V to 6.8V current control applies nearly .4A until voltage control or float state is entered. Batteries can only be tested under load. Even if it measures 6V or more unloaded, it can still produce little or no voltage u nder load as a defective battery's internal impedance increases. Apply power to the bike from the external power supply, first confirming AC voltage is present Remove the battery connector from the 27451 PCB at location J1 Is the voltage 6.8V +/- 3% Yes Measure the voltage on the 27451's J1 pins 2 and 3 Replace the battery No Replace the 27451 PCB Measure the voltage on test points 1 and 3 of the 27451 Is the voltage 9V +/- 10% Yes No General bike electrical testing Unplug the external power supply cable at location J3 Is the voltage 9V +/- 10% Yes Replace the 27451 PCB Measure the voltage of the contacts of this connector on pins 1 and 2 No Unplug the power supply and measure its voltage on pins 1 and 2 Is the voltage 9V +/- 10% Yes No Replace the external power cable Replace the power supply General bike electrical testing Charge the battery for 8 hours, or until 6.8V is achieved Charge the battery for 8 hours, or until 6.8V is achieved

3. 3 Nautilus® Commerical Series Bike Service Manual Product Specifications ................................. 5 Important Safety Information ................ 6 Safety . Warning . Labels . ............................................ 7 Maintenance ........................................................ 9 Maintenance . Records ........................................... 11 Resetting . the . Maintenance . Hour . Timer ................ 11 Routine . Maintenance ............................................ 11 Checking . the . Battery . Charge ................................ 11 Recharging . the . Battery . Back-up ........................... 12 Battery . Disposal .................................................... 12 Console Code s ................................................. 13 Overview ................................................................ 1 5 Default s .................................................................. 1 5 Customize ............................................................... 1 5 Machine . Status ...................................................... 1 6 Diagnostics ............................................................. 1 7 Maintenance . Logs .................................................. 1 8 Machine . Configuration ........................................... 20 Electrical Troubleshooting ....................... 21 U916/R916 . Main . Wiring . Diagram . ........................ 23 U916 . Console . Heart . Rate . Wiring . Diagram ............ 24 R916 . Console . Heart . Rate . Wiring . Diagram ............ 25 General . Bike . Electronics . Troubleshooting ............. 26 Mechanical Troubleshooting ................. 35 Removing/Replacing . Parts . - . U916 . and . R916 . Common . Parts .............................. 37 Removing/Replacing . Parts . - . U916 . Parts .............................................................. 48 Removing/Replacing . Parts . - . R916 . Parts .............................................................. 51 Cable . Connections . - . U916 ...................................... 53 Cable . Connections . - . R916 ...................................... 56 Appendixe s ......................................................... 59 Required . Tools ........................................................ 60 . Using . a . Multimeter ................................................ 61 International . Power . Plug . Configurations ............... 64 Warranty . Information .................................................... 65 Contact . Numbers .......................................................... 67 Table of Contents

27. 27 Nautilus® Commerical Series Bike Service Manual General Bike Electronics Troubleshooting 2 D oes the r esistance feel smoot h ? Ye s No Pe r for m A l te r nato r T e s t i ng Increase R P M and leve l s until f i rm r e sistance is felt Is fi r m re si sta n c e f el t ? Ye s No Pe r form L o ad Re s i st o r T e st i ng Stop p e daling , and p r ess stop t w ice if w o rkout r esults a r e d e sired App r oxima t e l y 1 minute aft e r p e dalin g sto p s, t h e console should s hu t o ff Di d t he console shu t off? Ye s No Bike Is Operating P r operly ! Pe r form Shu t - D own T e s t i ng 3 Remo v e 4 s c rews hol d i n g co n s ole to ma s t Whil e noting locations, carefully unplug all connections to c o ns o l e coming from m a st Using O HM Me t e r , perfor m co n tin u i ty check on main in t er f ace cable , using w i r e c o lo r s a s a g u i de Is continuity OK ? Ye s No R e place console R eplac e mai n inte r face cable Gene r al b i ke ele ct ri c al t es t ing Continuation of General Bike Electronics Troubleshooting

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