Danfoss VLT HVAC Drive FC 100 Service Manual page 172

High Power Service Manual for VLT
Adjustable Frequency Drives
8. If the unit is not equipped with the load sharing option, proceed to step 9. If the unit is
equipped with load sharing, the load share minus (-) bus bar must be removed as follows.
9. Remove both positive (+) and negative (-) SCR output bus bars by removing the 6 con-
nection screws (T50). There are 3 screws per bus bar.
10. Remove the three SCR and diode input bus bars by removing the 6 connection screws
(T50). There are 2 screws per bus bar.
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Figure 8.9: SCR and Diode Modules (2 of 3)
1 Load sharing option retaining stud (Step 8)
2 SCR and diode input bus bar BB41 (Step 10)
3 Positive (+) output bus bar BB42 (Step 9)
®
FC Series
8a. Remove the 2 retaining nuts (13 mm) connecting the load share bus bar to
the SCR output bus bar.
8b. Remove the retaining nut (17 mm) connecting the load share bus bar to the
load share terminal on the opposite end of the bus bar (not shown).
8c. Remove the load share bus bar.
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5
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MG.90.L1.22 - VLT ® is a registered Danfoss trademark
8 E-Frame Sizes Disassembly and Assembly
Positive (+) output bus bar connecting screw (Step 9)
Negative (-) output bus bar BB42 (Step 9)
Negative (-) output bus bar connecting screw (Step 9)
Instructions
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