OTIS MRL Issue

Unit Make: Otis (MRL) 2-Stop
Model: MLB3
A brief summary of the issue: Keeps having an unintended motion fault, checked all associated circuits. Reset fault. Day or two later comes back, car level at floor.

try cleaning belts an sheaves

That was our thought as well, but still doing it after cleaning them. Forgot to mention that was done. Any additional ideas?

any error logs showed?

Check your power supply at bottom of the controller