4–11Component Test Procedures
Publication 1336 IMPACT-6.2 – March 1998
Important: Before you remove connections and wires from the
drive components, mark the connections and wires to
correspond with their component connections and
terminals to prevent incorrect wiring during assembly.
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 Gate Driver Board. Refer to Chapter 3 –
Disassembly and Access Procedures, Removing the Gate Driver
Board.
5. Set your meter to test resistance.
6. Check for an open condition across Bus Fuse F1.
7. If the fuse shows an open condition, replace the fuse. Refer to
Chapter 5 – Part Replacement Procedures, Bus Fuse F1.
8. 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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