LEESON NEMA 4X SCR Control: 174107.00 - Manual (Page 40)

34 SPEEDMASTER™ OPERATION MANUAL
Before troubleshooting
Perform the following steps before starting any procedure in this
section:
• Disconnect AC line voltage from the drive.
• Check the drive closely for damaged components.
• Check that no conductive or other foreign material has
become lodged on the printed circuit board.
• Verify that every connection is correct and in good
condition.
• Verify that there are no short circuits or grounded
connections.
• Check that the voltage switch settings match the AC line
and maximum armature output voltages.
• Check that the drive’s rated armature outputs are consistent
with the motor ratings.
Troubleshooting
Warning
Dangerous voltages exist on the drive when it is powered.
When possible, disconnect the drive while troubleshooting.
High voltages can cause serious or fatal injury.
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