SCIFIT ac4000 User manual

SCIFIT
Service Manual
4000 Series Stepper
SCIFIT Service Center
5616 A, S. 122 E. AVE.
TULSA, OK 74146
800-745-1373 ext 21
[email protected]

2
TABLE OF CONTENTS
Replacement Parts List For Stepper ................................................................................3
Replacement Parts Drawing ............................................................................................ 4
Parts Replacement Procedures For Stepper
Brake ............................................................................................................... 5
Brake Power Adjustment .................................................................................. 5
Cable ............................................................................................................... 6
Fuse ................................................................................................................. 7
Lower Board Wiring Diagram .......................................................................... 7
Eprom Replacement ......................................................................................... 7
Troubleshooting Guide ..................................................................................................... 8-10

3
REPLACEMENT PARTS LIST FOR STEPPER
ITEM
NO. PART NUMBER PART DESCRIPTION
1333944005 3” Cable Pulley
2444SI-140 Speed Sensor Pickup
3333947003 Extension Spring
4222GS-33 Speed Pickup Decal
5333940504
333940505 Left Drive Hub Right Drive Hub
6333944009 2” Square Plastic Cap
7333944004 2” Aluminum Cable Pulley
8333944015 2-1/2 Rubber Stop
9333946008
333940202 Clevis Clevis Pin
10 333941000-1Foot Pedal
11 333941010 Stepper Cable 4000 Series
12 333940608 Flywheel
13 444B5S28 Stepper Brake 6 Lbs
14 333945102 2” Brake Pulley
15 333943009 Tension Idler Bearing
16 333945103 8” Pulley
17 333942221 Ac Outlet
18 333942220 Ac Power W/Fuse Connector
19 333940600 Handle Bar
20 444T-25B Plastic Console
21 4441007 Upper Stepper Display
22 333945104 V Belt
23 333940603-B-L
333940603-B-RStepper Hood Left Black Stepper Hood Right Black
24 333943014 Stepper Chain
25 333944003 2” Plastic Pulley
26 333943012-13 Chain Sprocket & Bearing
27 333941012 Outside Cable 8000 Series
28 333941013 Inside Cable 8000 Series
29 444GBB24 11 Lbs Particle Brake

4

5
4000 Series Stepper
REMOVE STEPPER BRAKE 4000 SERIES
1. Remove hood.
2. Push belt tensioning bearing clockwise to release the pressure off the belt to remove the belt.
3. Remove 15/16 nut that holds on the flywheel and remove the flywheel.
4. Remove the small 2” pulley of the brake with a 9/64” allen wrench.
5. Disconnect the (2) white wires going to the lower board.
6. Remove the (3) 10/32 nuts that hold the brake in place.
7. Replace in reverse order.
ADJUSTING THE BRAKING POWER
1. Remove the hood.
2. Step up on the pedals and set the upper display to 15 feet per min. or level 1.5.
3. After one minute it should take 7 seconds for the pedals to go from the top of the stroke to the bottom.
4. On the lower board there is a small potentiometer that is turned counterclockwise for.
more power. This adjustment is very small only from 3:00 to 2:30 or 2:00.
NOTE: You must adjust pot setting when installing board.
4000 SERIES

6
STEPPER CABLE REMOVAL 4000 SERIES
1. Remove hood.
2. (Note) Cable is wrapped counterclockwise starting from the inside going out.
3. (Important note) Do not remove both cable at one time.
4. When replacing cable be sure the ball on the cable lines up with the drive hub hole.

7
CHECK OR REPLACE FUSE
1. This is located under the bike where the power cord connects.
2. Pull out the slot in the bottom of the power supply holder.
3. The fuse is a 15 amp. 5x20mm part#333942224.
LOWER BOARD WIRING DIAGRAM FOR STEPPER 4000 SERIES
HOW TO REPLACE EPROM
1. Unplug machine.
2. Remove four screws that hold upper board in casing.
3. Unplug ribbon cable and heartrate monitor.
4. Remove 4 or 5 hex standoffs from the display board fig.1 (A)
5. Turn display board over and remove EPROM fig. 1 (B),
and replace with new EPROM with the notch in the same direction.
6. Reverse order to assemble.
Fig 1

8
TROUBLESHOOTING GUIDE
LS & FS 4000
A.PEDALS SPEED UP AND DOWN WITHOUT USER CHANGING SPEEDS
1. CHECK DISPLAY FOR CORRECT SOFTWARE REVISION BY UNPLUGGING THE MACHINE AND
THEN PLUG IT BACK IN AND LOOKING AT THE SECOND SET OF LED’s ON THE LEFT ( THE
FPM/WATTS WINDOW)
a. REV. 9055 FOR 4000
2. CHECK SPEED SENSOR FOR ALIGNMENT
a. CENTER OF FLYWHEEL
b. 1/8” TO 3/16” DISTANCE OFF FLYWHEEL
c. CHECK CONNECTION TO LOWER BOARD FOR GOOD
CONNECTION.
3. REPLACE LOWER BOARD IF ABOVE DOES NOT CORRECT PROBLEM
B.CAN NOT MOVE PEDALS ON CLIMBER.
1. CHECK DISPLAY FOR CORRECT DIP SWITCH SETTING BY UNPLUGGING THE MACHINE AND
THEN PLUG IT BACK IN AND LOOKING AT THE FIRST LED’S ON THE LEFT ( THE TIME WINDOW).
a. STEPPER DISPLAY’S # 01.
b. BIKE DISPLAY’S # 00.
C. UPPER CONTROL PANEL GOES BLANK AND PEDALS GO TO FLOOR ( NO
RESISTANCE)
1. CHECK FUSE
2. CHECK RIBBON CABLE CONNECTION ON LOWER & UPPER BOARDS
3. CHECK FOR 110V AT BLACK(AC1) & WHITE(AC2) WIRE ON LOWER BOARD.
4. REPLACE LOWER BOARD.
D. UPPER CONTROL PANEL GOES BLANK AND PEDALS LOCK UP
1. CHECK RIBBON CABLE CONNECTION ON LOWER & UPPER BOARDS
2. REPLACE LOWER BOARD

9
E. UPPER BOARD WORKING -CAN’T CHANGE RESISTANCE -PEDALS GO TO FLOOR
SLOWLY
1. CHECK DIP SWITCH SETTING, SHOULD BE 01
2. CHECK POT ADJUSTMENT ON LOWER BOARD
2. REPLACE LOWER BOARD
F.UPPER BOARD HAS POWER BUT NO LIGHTS-PEDALS GO TO FLOOR -NO
RESISTANCE
1. REPLACE LOWER BOARD
G. IN QUICK START PEDALS GO TO FLOOR BUT IN PROGRAM IT WORKS.
1. REPLACE LOWER BOARD
H. PEDALS LOCK UP IN PROGRAM
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION TO LOWER BOARD.
2. CHECK RIBBON CONNECTION AT LOWER & UPPER BOARDS
3. REPLACE LOWER BOARD
I. UPPER BOARD BLINKING NUMBERS OFF/ON THEN GOES DEAD.
1. CHECK RIBBON CABLE CONNECTIONS
2. UNPLUG AND PLUG MACHINE TO RESET.
3. REPLACE LOWER BOARD
J. NO RESISTANCE ON PEDALS....”SCIFIT” GOES AWAY..CAN PROGRAM.
1. NO SPEED SIGNAL, CHECK FPM READOUT ON THE DISPLAY. ADJUST THE SPEED PICKUP
ACCORDING.
2. (2) WHITE WIRES ARE DISCONNECTED GOING TO THE BRAKE.
3. WRONG DIP SWITCH SETTING ON DISPLAY (01 ONLY).
4. CHECK THE VOLTAGE ON THE WHITE OR BLUE WIRES 24V DC.(see pg.7)
5. CHECK THE V-BELT INSIDE..4000 SERIES ONLY.
6. REPLACE LOWER BOARD
K. VERY LITTLE RESISTANCE AT ANY LEVEL...PEDALS GO TO FLOOR.
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION.
2. INCREASE POT ADJUSTMENT ON LOWER BOARD FOR MORE BRAKE
3. REPLACE LOWER BOARD
L.MACHINE DOES NOT POWER UP.
1. POWER CORD UNPLUGGED OR NO POWER AT OUTLET.
2. BLOWN FUSE. REPLACE FUSES (SEE PAGE 6)
3. RIBBON CABLE HAS A BAD CONNECTION OR IS NOT FULLY
PLUGGED IN. REMOVE THE CONNECTIONS AT THE UPPER AND
LOWER BOARDS, AND INSERT BACK INTO THE SOCKET.
M.HEART RATE DISPLAYS ZERO (0) IN WINDOW
1. THE CHEST STRAP AND TRANSMITTER MUST BE PROPERLY WORN.
2. VERIFY THAT THERE IS GOOD SKIN CONTACT WITH THE
TRANSMITTER UNIT IS FUNCTIONING PROPERLY.
3. CHECK SENSOR LEAD CONNECTION AT THE UPPER BOARD.
4. IF NO AUDIBLE SIGNAL, REPLACE RECEIVER.
N. BEARING NOISE INSIDE THE STEPPER.
1. BEARINGS ARE LOCATED INSIDE THE MAIN HUBS, BELT
TENSIONER, ON 4000 SERIES.
2. CABLE PULLEYS AND THE BRAKE ON 4000 AND 8000 SERIES

10
O. LEVEL 3 IS LIKE LEVEL 7
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION.
2. ADJUST POT ON LOWER BOARD
P.PEDALS WILL NOT GO DOWN WITH A LIGHT PERSON ON CLIMBER BUT WORKS WITH
A HEAVY PERSON.
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION.
2. ADJUST POT ON LOWER BOARD
Q. PEDALS GO TO FLOOR OR VERY LITTLE RESISTANCE WITH A HEAVY PERSON ON
THE CLIMBER BUT WORKS WITH A LIGHTER PERSON.
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION
2. ADJUST POT ON LOWER BOARD.
R. LEVEL 7 IS LIKE LEVEL 3.
1. CHECK SPEED SENSOR ADJUSTMENT AND CONNECTION
2. ADJUST POT ON LOWER BOARD.
S.AFTER ONE MINUTE IN A PROGRAM THE CLIMBER GOES BACK TO SCROLLING
“SCIFIT” PEDALS LOCK UP AND STARTS THE PROGRAMMING OVER AGAIN.
1. CHECK RIBBON CABLE CONNECTION IN UPPER & LOWER BOARDS,
2. CHECK SOFTWARE FOR CORRECT REVISION (9055)
3. IF OK, REPLACE UPPER BOARD
T. PROGRAM STOPS ... LINES OF DOTS SHOOT ACROSS SCREEN.
1. CHECK RIBBON CABLE CONNECTION
2. REPLACE UPPER BOARD
U. CLIMBER SHUTS DOWN IN PROGRAM, PEDALS GO TO FLOOR, BUT WORKS IN
MANUAL.
1. REPLACE UPPER BOARD
V. WATER IN UPPER CONTROL PANEL...SHORTED OUT UPPER BOARD..NO HOLES
WERE DRILLED IN UPPER DISPLAY HOUSING.
1. REPLACE UPPER BOARD, RIBBON CABLE, HEART RATE RECEIVER
DRILL HOLES IN HOUSING.
W. “SCIFIT” SCROLLING DOES NOT GO AWAY AFTER STEPPING UP ON PEDALS
1. CHECK DIP SWITCH SETTING, SHOULD BE 01.
2. CHECK POT ADJUSTMENT ON LOWER BOARD.
3. CHECK SPEED SENSOR ADJUSTMENT.
X. PEDALS HOLD YOU UP, CAN’T SELECT PROGRAM OR ENTER INFO AND CAN NOT
HEAR “BEEP” WHEN BUTTONS ARE PRESSED
1. REPLACE MEMBRANE
Y. “SCIFIT” SCROLLING GOES AWAY, ASK YOU TO BEGIN PROGRAMMING BUT CAN’T
ENTER ANY INFO INTO CLIMBER
1. REPLACE MEMBRANE