Friday, March 15, 2013


Error 44 - Un-commanded Lift Motion
 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 turned on
condition or the lift position sensor (lift position potentiometer or revolution sensor) is sending an
erroneous signal to the lift control circuit.
Possible Causes
1. Poor or intermittent connection in the lift position sensor.
2. Bad lift position sensor
3. Bad lower PCA.
Possible Remedies
1. This is the most common cause of an error 44. Verify all wiring and connections associated
with the lift position potentiometer. Repair or replace wiring or connections as appropriate.
Because of the nature of the revolution sensor an error 44 is rarely associated with it.
2. Operate the lift in the diagnostics while monitoring the lift position number being displayed.
The the reading is erratic and makes large changes in readings the lift position potentiometer
is probably bad. Replace the lift position potentiometer or the lift motor if it utilizes an internal
3. If there is actual lift motion without a manual or program control lift command having been
issued, replace the lower PCA.