Precor Error Code 44 Un-commanded Lift Motion

Mar 12, 2022

Applies to All machines with a lift actuator

Issue symptoms

The lift control system has detected that the lift is in motion without a lift command having been issued. This can happen in one of two ways: either the lift drive circuit has failed in a powered-on condition or the lift position sensor (lift position potentiometer or revolution sensor) is sending an erroneous signal to the lift control circuit. This is most often caused by a poor or intermittent connection of the lift motor potentiometer, or the potentiometer itself is defective. Less likely but possible is a defective lower PCA.

Troubleshooting steps

1. Verify all wiring and connections associated with the lift motor assembly. Repair or replace wiring or connections as appropriate.
2. Operate the lift in the diagnostics while monitoring the lift position A/D number being displayed. If the reading is erratic and makes large changes in readings, the lift position potentiometer is probably bad. Replace the lift motor assembly.
3. If there is actual lift motion without a manual or program control lift command having been issued, replace the lower PCA.