Precor EFX546 Service Manual download pdf (Page 25)

C546 Self Powered Elliptical Fitness Crosstrainer

Page 25

Procedure 6.4 - Troubleshooting the Generator

The generator performs three functions in the EFX. 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 EFX’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

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 leads, hands, etc. clear of all moving parts. Using an AC voltmeter,

measure the voltage between M3 and M4, M4 and M5, M3 and M5 on the lower PCA. All

three 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.

3. If any of the three 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.

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Precor EFX546 Service Manual Page 25