Precor Precision 400 Series Service Manual page 240

8. Remove the lift power connector from the lower board. Using an ohmmeter, measure
between terminals 1 and 2 (white and red) between terminals 1 and 3 (black and
white) and between terminals 2 and 3 (red and black). The measurements should be
approximately 14.7W, 1 4. 3W and 29W, respectively. If any of the meas-
urements are significantly low, replace the lift motor. If any of the readings are open or
significantly high, check the lift motor cable and connectors. Repair any wires or con-
nections that are bad. If the cable and connectors are good, continue with step 9.
9. Re-insert the lift power connector in the lower PCA. Set the on/off switch in the "on"
position. Using an
(white and red wires) of the lift power connector. Enter the manual program and press
the CROSSRAMP A key. The measurement should be approximately 120 Vac (line
voltage). If the voltage is present and the lift motor moves normally, skip to step 10.
The voltage will only be present until such time as an error occurs. If line voltage is not
present skip to step 11. If line voltage is measured but the motor does not move,
replace the lift motor.
10. Monitor terminals 1 and 3 (white and black wires) of lift power connector. Enter the
manual program and press the CROSSRAMP V key. The measurement should be
approximately 120 Vac (line voltage). If the voltage is present and the lift motor moves
normally skip to step 13. The voltage will only be present until such time as an error
occurs. If line voltage is measured but the motor does not move, replace the lift motor.
11. The voltage will only be present until such time as an error occurs. If line voltage is
measured but the motor does not move, replace the lift motor. If the console does not
indicate that the lift is moving in both directions when the appropriate CROSSRAMP
key is pressed the problem is either the upper PCA or the keyboard (display housing).
Troubleshoot the keyboard using the diagnostic test. If the keyboard is good, replace
the upper PCA.
12. If the console indicates that the lift is moving in both directions when the appropriate
CROSSRAMP key is pressed, the problem is either the upper data cable, lower data
cable or the lower PCA. There are not any good tests to check these parts other than
substituting a known good part. Replace only one part at a time. If the new part does
not correct the problem, replace the original part
13. If you have performed all of the above tests and the lift system is still not functioning,
call Precor Technical Support.
1
Alternating Current: electric current which periodically reverses direction between positive
and negative polarity.
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
1
AC voltmeter, monitor the voltage between terminals 1 and 2
7 Troubleshooting
System Troubleshooting Procedures
Page 232