Troubleshooting The 3 Phase Ac Drive Motor System; Troubleshooting The Drive Motor; Procedure - Precor TRM 885.v2 Service Manual

Possible Remedies
1 Check the Error log for multiple occurrences of the error with the same odometer reading. Clear the
error log, and cycle power to the machine.
2 Open the console and check the connectors. Ensure that they are securely connected to both the
upper PCA and to the machine control.
3 Check the cable for visual damage; use an ohmmeter to verify continuity on each line. Replace both
the cable and machine control if a fault is found.
4 Inspect the machine control for corrosion or damage, and replace both the machine control and
cable if any damage is found.
5 Review the software version of the P30. If the user states the issue is related to the machine
controls not working as designed, the P30 software may need to be updated in addition to the
replacement of the machine control and cable assemblies. Current software versions are available
on the Precor Connection website.

Troubleshooting the 3 Phase AC Drive Motor System

Occasionally, there may be issues with the proper operation of the drive system that do not
generate error codes. This troubleshooting procedure is intended for those times.
If there is an error code for the drive system (Error 17-20, 25, 27-28, 35-36, 85, 88) in the error
log, go to the appropriate error code troubleshooting page and follow the steps for that error.
If there are no errors in the log, yet the drive system appears to have issues (such as jittery
motion) follow the steps below.
Note: When taking voltage readings of the AC drive motor, the readings may not seem
accurate because of the frequencies being used, however, they are indicative of the
presence of drive motor voltage and relative frequency changes.

Troubleshooting the Drive Motor

Procedure:

If the drive motor will not start at all, note any error that might result, and continue with step 1. If
the drive motor starts when you force the running belt to move and once running the drive motor
runs rough, a phase may be missing, and an error will not be generated. Continue with step 1.
Note: If the drive motor does not start on its own, the Motor Controller will only apply voltage for
a couple of seconds before it shuts down. Therefore the voltage readings in the following step
must be taken within the first couple of seconds after the treadmill is instructed to start the
running belt. (A multi-meter with a hold feature is helpful in this case)
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