26
Before troubleshooting
Perform the following steps before starting any procedure in this
section:
1. Disconnect AC line voltage from the PCM4 and variable
speed drive.
2. Check the PCM4 and drive closely for damaged components.
3. Check that no conductive or other foreign material has become
lodged on the printed circuit board.
4. Verify that every connection is correct and in good condition.
5. Verify that there are no short circuits or grounded connections.
6. Check that the input voltage jumpers are installed properly for
the input voltage being used (see page 6).
7. Check that the drive’s rated armature and field outputs are
consistent with the motor ratings.
Warning
Dangerous voltages exist on the PCM4 when it is powered.
High voltages can cause serious or fatal injury.
m
Troubleshooting
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