Testing Elevation Motor
Troubleshooting
47
• 110 VAC treadmills use a 90 VDC drive motor. For every mile per hour you spin the drive motor you will gener
-
ate approximately 10 VDC output. So, at 1 mph you will measure 10VDC +/- and at 9mph you will measure
90VDC +/-.
• 220 VAC treadmills use a 180 VDC drive motor. For every mile per hour (mph) you spin the drive motor you will
generate approximately 20 VDC output. So, at 1.0mph you will measure 20 VDC +/- and at 9.0mph you will
measure 180 VDC +/-.
• If you measure very low DC voltage or zero DC voltage:
• Check the drive motor brushes for condition. Motor brushes are the leading cause for drive motor failure.
Remove them and measure them. If the motor brushes are worn below 3/8" in length, replace them.
Alternate Test 1:
Attach 9 or 12 volt battery to motor leads. There should be motor movement.
Alternate Test 2:
a. Unplug treadmill.
b. Disconnect drive motor wires.
c. Remove drive belt. See “Drive Belt” on page
d. Hold black and white wires together and spin the flywheel. There should be resistance when wires are con
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nected.
Note:
If red LED is lit then current draw is high.
6. Check condition of motor commutator. If it is burnt, scratched, or scored, use commutator stone to clean. If it is
too badly damaged, motor must be replaced.
7. Check condition of motor shaft
• Does it seem to wobble? Check that flywheel and pulley are tight and in line.
• Is shaft visibly bent/broken? Replace motor.
6.5.
Testing Elevation Motor
Measure the input voltage (AC) to the elevation motor:
1. Secure the black (negative) probe to a good chassis ground.
2. Place the red probe on the red wire in the elevation harness.
3. Press the elevation DOWN key. You should see a reading of 120 /220VAC, depending on the model of treadmill.
4. Place the red probe on the BLACK wire in the elevation harness.
5. Press the elevation UP key. You should see a reading of 120/220VAC, depending on the model of the treadmill.
6. If the elevation motor is getting the proper AC voltage input but does not turn, replace it.
WARNING
This test requires that power be applied to the circuitry. Use caution to avoid electrical
shock.
Summary of Contents for L7 Club
Page 1: ...L7 L8 L9 Treadmill 90 Series Service Manual...
Page 4: ...Grounding Instructions 4...
Page 16: ...Introduction Recommended Tools 16...
Page 26: ...Electrical Reference Harnesses 26...
Page 30: ...Routine Maintenance Maintenance Checklist 30...
Page 102: ...Replacement Parts 102 Figure 8 8 Control Panel 17 16 15 13 14 12 11 11 9 5 3 7 6 2 4 8 1...
Page 116: ...Replacement Parts 116...
Page 119: ......