Danfoss VLT Series Service Manual page 31

Six-Pack IGBT Module:
1. Remove all wire leads connected to the Six-Pack module.
2. Remove the mounting hardware and remove from the unit.
3. Clean the remaining heatsink compound from the enclosure heatsink and
the Six-Pack module.
4. Apply silicon grease 3 mils thick to the entire base of the Six-Pack module.
5. Install the module and alternately tighten the mounting hardware to 21-23
LB-IN (2.5Nm).
6. Re-connect all wire leads to the Six-Pack Module.
IGBT Modules (VLT 3008, 380V/460V; VLT 3508-3511, 380/460V):
1. Remove all wire leads connected to the IGBT modules.
2. Remove the hardware holding the DC Link PCB to the IGBT Modules.
3. Remove the hardware which connects the Motor Coil to the IGBT lead on
the module to be replaced.
4. Remove the two mounting screws and remove from the unit.
5. Clean the heatsink grease from the enclosure heatsink and underneath the
IGBT Module.
6. Apply silicon grease 3 mils thick to the entire base of the IGBT Module.
7. Install the module and tighten the mounting hardware to 21-23 LB-IN (2.5Nm).
8. Reverse the steps above to replace.
Section Four
4 - 3