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M-SV-001-EN Rev. G
Figure 4-101 Soft Start Fuse Locations
1. Isolate the compressor power as described in Section "1.8 Electrical Isolation" on page 19.
2. Remove the Soft Start. Refer to "4.15.4 Soft Start Removal (Closed-Top)" on page 112.
3. Flip the Soft Start to access the fuses. Refer to "Figure 4-101 Soft Start Fuse Locations" for detail
on the fuse locations. Refer to "Table 4-25 Soft Start Fuse Details" on page 112 for fuse detail.
4. Using a multimeter set for resistance measurements, place the leads on the ends of the F1 fuse.
The reading should be less than 1Ω.
• An open F1 fuse may indicate a problem with the DC-DC
5. Using a multimeter set for resistance measurements, place the leads on the ends of the F2
Nano fuse. The reading should be less than 1Ω.
• An open F2 fuse may indicate a problem with the DC-DC
6. Using a multimeter set for resistance measurements, place the leads on the ends of the F3
Nano fuse. The reading should be less than 1Ω.
• An open F3 fuse may indicate a problem with the Soft Start Circuit Board
7. Using a multimeter set for resistance measurements, place the leads on the ends of the F6
Nano fuse. The reading should be less than 1Ω.
• An open F6 fuse may indicate a problem with the Soft Start Circuit Board
8. Using a multimeter set for resistance measurements, place the leads on the ends of the F4 or
F5 fuses. The reading should be around 30-38Ω for either fuse.
• An open F4 or F5 fuse may indicate a problem with the Soft Start transformers, circuit
board, or fan
Not present
on Revision "S"
and earlier Soft
Starts
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