Stairmaster FreeClimber, Service Manual

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3400 CE/3800 RC MOMENTUM SYSTEMS - ELECTRICAL TROUBLESHOOTING
Please refer to your owner’s manual for detailed instructions. If you do not have an owner’s manual please call
our Customer Service phone number to order one.
1. Remove the side covers.
2. Test the battery connection at the power control board (PCB). Measure VDC between yellow test points
7 and 10 (near the battery connector) of the PCB for a minimum of 6.0 VDC. If the measured voltage is
6.0 VDC or more, skip to step 6.
3. Test the battery. Unplug the battery connector from the power control board and locate pin 2 and pin 3
in the end of the battery connector.
4. Use a voltmeter to verify that the voltage between pin 2 (negative) and pin 3 (positive) is a minimum of
6.0 VDC. Install the battery charger for at least 24 to 48 hours if the voltage measured is below 6.0
VDC. It is okay to use the machine with the battery charger connected. After 48 hours, repeat step 3 - 4.
If the voltage measured is below 6.0 VDC then the battery is bad.
5. Plug the battery connector back into the power control board.
6. Test the main cable. Remove the four console knobs from the console. Gently lift the console up and disconnect
the main cable from the back of the console. Have an assistant pedal the bike and while you test pins
1 and 10 of the main cable at the console connection for a minimum of 6.0 VDC.
7. Reconnect the main cable to the console.
8. Verify that the inductive switch is adjusted to within 1/32" (0.8 cm) of the speed sensor disk on the front of the
alternator.
9. Test the inductive switch. Unplug the inductive switch cable from the power control board and test pins 1 and 2
for AC voltage while pedaling. VAC should increase with RPM.
10. Test the inductive switch PCB point. Plug the inductive switch back in. Use a voltmeter to verify that the AC
voltage at yellow test points 10 and 12 of the PCB increases when RPM's increase (test point 10 is positive, test
point 12 is negative).
11. Test the alternator. Unplug the alternator wiring connector from the PCB.
12. Connect alligator clips between the B+ terminal and the FLD terminal of the alternator.