4–9Component Test Procedures
Publication 1336 IMPACT-6.2 – March 1998
1. Remove power from the drive.
2. Check for zero volts at TB1 terminals +DC and –DC.
3. Check for absence of control voltage at:
• TB10
• TB11
• L Option Board (if used)
4. Remove the Snubber Board. Refer to Chapter 3 – Disassembly
and Access Procedures, Removing the Snubber Board.
5. Set your meter to test diodes.
6. Test Power Modules PM1, PM2, and PM3. The following table
shows meter connections and ideal meter readings for those
connections. Refer to the former illustration for meter connection
locations.
Table 4.C
Power Modules PM1 – PM3
Motor (+) Lead
Meter (–) Lead Nominal Meter Reading
C2E1
E2
C1
C2E1
B1
B2
E2
C2E1
C2E1
C1
E1
E2
Infinite
0.36
Infinite
0.36
Infinite
Infinite
7. Replace Power Module PM1, PM2, or PM3 if meter readings are
not as shown. Refer to Chapter 5 – Part Replacement Procedures,
Power Modules PM1 – PM3.
8. If one or more Power Modules is replaced, test the Gate Driver
Board. Refer to Testing the Gate Driver Board in this chapter.
9. Assemble the drive in reverse order of disassembly.
!
ATTENTION: Replace all guards and insulators
before applying power to the drive. Failure to replace
guards may result in death or serious injury.
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