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Troubleshooting Generated Power
The generator performs three functions in the AMT. First, by controlling the amount of electrical load applied
to the generator, the user’s pedaling resistance is controlled. Second, the generator is used to charge the
AMT’s internal battery. Lastly, one of the generators three phase output windings is monitored to determine
when the unit is in use and when it is idle. This system also determines the stride rate by determining the
operating speed (output frequency) of the monitored generator winding.
WARNING:
Before continuing with this procedure, review the Warning and Caution statements listed in the Warning and
Caution Statements and General Safety Guidelines Section, Things You Should Know.
Because this is a self-powered unit, it will be necessary to equip the unit with the optional external power supply
or have an assistant pedal the unit while voltage measurements are being taken. Because of the danger of working
on the unit while it is in motion, using the optional external power supply is strongly recommended.
Perform the generator resistance test per Procedure XX. If any of the resistance measurements are
significantly high or significantly low, replace the generator.
The following voltage reading must be taken while the unit is in motion. Extreme care must be taken to keep
meter leads, hands, etc. clear of all moving parts. Using an AC voltmeter, measure the voltage between 1
& 2, 2 & 3, and 1 & 3 on J1 of the lower PCA. All AC voltage readings will vary depending on the unit’s
stride rate at the time the measurement is taken. At a stride rate of 100 strides per minute, all three voltage
readings will be approximately 100 VAC -110 VAC.
If any of the three readings in step 2 are significantly low, replace the generator.
If you have performed all of the above tests and are unable to resolve the problem, contact Precor customer
support.
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