![background image](http://html1.mh-extra.com/html/danfoss/turbocor-tt-series/turbocor-tt-series_service-manual_4104524191.webp)
Figure 4-214 Spring Pin Identification
3. Replace any defective spring pins (bent pin head or inconsistent height on top with others) with new
ones. Only do this when absolutely necessary. When removing the spring pins, use small needle-nose
pliers and gently pull straight up with no lateral movement.
NOTE
Do not attempt to straighten or repair any damaged spring pins. The defective pins must be replaced.
4. Discard the defective spring pins and inspect the Inverter for any foreign objects.
5. Insert the new spring pins carefully and verify they line up in the notches. Refer to Figure 4-212 Seated
6. Retrieve the new Driver Board from the packaging.
NOTE
Use extreme care when removing the new driver board and cover from the packaging. The cover snaps into place over the driver board
but could separate. Be sure to hold both to avoid dropping the driver board if separation occurs. If they do become separated, carefully
snap the cover back into place prior to assembly.
7. For proper alignment, insert two (2) of the fasteners in opposite corners of the Driver Board.
8. Align the new Driver Board over the Inverter module with the connector towards the motor output bus
bar (the shape of Driver Board must be aligned with Inverter Press Plate shape). Refer to Figure 4-215
Driver Board Placement for the next two (2) steps.
9. Lower the Driver Board down on the Inverter module, do not allow for any lateral movement. Be sure
the bottom of the Driver Board is parallel with the Press Plate.
• • • CAUTION • • •
Any lateral movement may damage the spring pins.
Figure 4-215 Driver Board Placement
10. Insert the remaining fasteners and tighten from center outward according to Figure 4-216 Initial
Tightening Pass Sequence on page 192. This will be the first pass and the fasteners should only be
snug and not torqued at this step.
M-SV-001-EN Rev. H-1/23/2023 Page 191 of 294
Содержание Turbocor TT Series
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