Owner's manual

21 Publication LZ-UM001A-EN-P - January 2008
Chapter 3
Troubleshooting
Introduction
Use this section to diagnose the health of motor coil and the Hall effect
module.
Hall Effect Module
Use the following procedures to troubleshoot the Hall effect module.
Hall Effect Circuit - Hall Signals Test
1. Turn the drive power OFF.
2. Verify the Hall circuit is connected to the drive per interface wiring
specifications.
3. Disconnect the motor leads from the drive.
4. Turn the Hall power supply ON (driver power ON).
5. Using an oscilloscope, while referring to the Motor Phasing Diagram,
check the waveforms at S1, S2 and S3 while slowly and steadily moving
the motor by hand in the specified phasing direction.
Topic Page
Hall Effect Module 21
PTC Thermal Signal 22
Motor Coil Electrical Test 23
Motor Back EMF Tests 24
Checking the Magnet Channel Butting Polarity 26
ATTENTION
Even with the motor power disabled and leads disconnected,
permanent magnet motors can generate high back EMF voltage
when moving due to external forces.