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Cummins/Onan OT3-UG-3 — .

For the Cummins/Onan OT3-UG-3.

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Procedure

  1. 7. 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . .
  2. 7. 3 Optional Control Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 8 SCHEMA ncs AND WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Mother Board 300-3953 (Utility-to-Generator Set) . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Mother Board 300-3267 (Utility-to-Utility) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 Mother Board 300-3090 (Utility-to-Generator Set) . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
  3. 626. 1762 (Sheet 1 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

Source: manual:962-0512 Onan OT III series (spec G) 40 to 1000 Amp Transfer Switch Service manual (11-1992).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.