Procedure 6.4 - Troubleshooting The Generator - Precor C100i Service Manual

Procedure 6.4 - Troubleshooting the Generator

The generator performs three functions in the C100i. First, by controlling the amount of electrical
load applied to the generator, the user's pedalling resistance is controlled. Second, the generator
is used to charge the C100i's internal battery. Lastly, one of the generators six 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
Because this is a self powered unit, it will either be necessary to either equip the unit with the
optional external power supply or have an assistant pedal on 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.
1. Perform the generator resistance test per Procedure 5.1. If any of the resistance
measurements are significantly high or significantly low, replace the generator.
2. The following voltage reading must be taken while the unit is in motion. Extreme care
must be taken to keep meter wires, hands, etc. clear of all moving parts. Using an AC
voltmeter, measure the voltage between red and black, red and white and black and
white wires at 3 Phase Gen In of the lower PCA. AC voltage readings will vary
depending on the unit's stride rate at the time the measurement is taken. At a stride
rate of 50 strides per minute, all three voltage readings will be approximately 40 VAC -
45 VAC.
3. If any of the readings in step 2 are significantly low, replace the generator.
4. If you have performed all of the above tests and are unable to resolve the problem,
contact Precor customer support.
C100i Adaptive Motion Trainer
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