GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 129)

8. Remove the 4 (10 mm) retaining nuts at the top of the IGBT bus bar assy.
9. Remove the 6 retaining screws on the upper portion of the IGBT modules. These screws also attach the snubber capacitors to the IGBT modules.
Remove the 3 snubber capacitors.
10. Remove the IGBT bus bar assy.
11. At the bottom end of a IGBT module, remove the 6 retaining screws (2 each for U, V, and W intermediate IGBT output bus bars).
12. Remove the retaining nut (8 mm) from the 3 intermediate IGBT output bus bars. Remove the intermediate IGBT output bus bars.
13. Remove the IGBT module.
14. Clean the heatsink surface with a mild solvent or alcohol solution.
REASSEMBLY
1. Replace the IGBT module in accordance with the instructions enclosed with the replacement module.
2. Tighten the remaining T25 and 8 mm screws to 2.3 Nm (20 in-lbs) and T30 and 10 mm to 4 Nm (35 in-lbs).
3. Reassemble the frequency converter in reverse order of disassembly and tighten the attachment hardware in accordance with the torque tables.
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Illustration 7.1: 41/43 IGBT Module (2 of 2)
1 IGBT module 5 Retaining screw (Step 9)
2 Snubber capacitor (Step 9) 6 Retaining nut (Step 11)
3 IGBT bus bar assembly (Step 8) 7 Intermediate IGBT output bus bar (Step 11)
4 Retaining nut (Step 8)
AF-650 GP and AF-600 FP High Power Service Manual
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