Drive Motor System Troubleshooting
About
Occasionally, there may be issues with the proper operation of the drive system that do not
generate error codes. This troubleshooting procedure is intended troubleshoot the 3-phase
Drive Motor System.
If there is a drive motor system Error code from 20 through 29 in the error log, go to the
for troubleshooting information.
If there are no errors in the error log, yet the drive system appears to have an issue (such as jit-
tery motion) then continue the troubleshooting procedure.
Related Error Codes
Drive system error codes: 20 through 29.
Refer to the
Error Code Troubleshooting Guide
for error code description and troubleshooting
information.
Procedure
Lower Control Module OUTPUT power Check
NOTE
: When taking voltage readings of the
AC
1
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.
1. If the drive motor starts when you force the running belt to move and the drive motor
runs rough, jump to the
Drive Motor Winding Check procedure below. If the drive motor
will not start, continue with the next step.
2. If the drive motor does not start, the lower control module 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 multimeter with a peak hold feature is recommended)
3. Connect an AC voltmeter between terminals 4 (red) & 5 (white) of the OUTPUT con-
nector on the lower control module. Set the treadmill ON/OFF switch to the ON position.
Press the QUICK START key. If the lower control module is supplying output, you will
momentarily read some value of AC voltage. Make a note of the voltage and set the
treadmill ON/OFF switch to the OFF position.
4. Set the treadmill ON/OFF switch to the OFF position. Repeat the previous AC voltage
measurement between terminals 4 (red) & 6 (black) of the OUTPUT connector as the
previous step. Voltage should read the same value as the OUTPUT pins 4 and 5. Set
the treadmill ON/OFF switch to the OFF position.
1
Alternating Current: electric current which periodically reverses direction between positive
and negative polarity.
Contact Precor Customer Support at [email protected] or 800.786.8404 with
any questions.
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7 Troubleshooting
System Troubleshooting Procedures
