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Cummins/Onan — ASIA PACIFIC

A Cummins/Onan service procedure — check it applies to your exact model before use.

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Procedure

  1. Introduction 6-2021 4 A065T489 (Issue 1) Copyright © 2021 Cummins Inc. No. Description 1 The Operator Panel is Located Behind The Hinged Door FIGURE 1. RSS TRANSFER SWITCH
  2. Introduction 6-2021 5 A065T489 (Issue 1) Copyright © 2021 Cummins Inc. FIGURE 2. RSS TRANSFER SWITCH WITH CONTROLLER (DOOR PANEL REMOVED) FIGURE 3. RSS TRANSFER SWITCH WITHOUT CONTROLLER, ONE BREAKER WITH DOOR PANELS REMOVED
  3. Introduction 6-2021 6 A065T489 (Issue 1) Copyright © 2021 Cummins Inc. The load is connected to the common of the transfer switch, see Figure 4. Under normal conditions, the load is supplied with power from the utility (as illustrated). If utility power is interrupted, the load is transferred to the generator set (genset). When utility power returns, the load is re-transferred to the utility. The transfer and retransfer of the load are the two most basic functions of a transfer switch. No. Description No. Description 1 Utility (Normal Power) 4 Over Current Protective Device (Customer Supplied) 2 Over Current Protective Device (Customer Supplied) 5 Generator Set (Emergency Power) 3 Load FIGURE 4. LOAD TRANSFER SWITCH (TYPICAL FUNCTION)
  4. Senses the interruption of utility power.
  5. Sends a start signal to the generator.
  6. Senses generator power is available.
  7. Transfers the load to the generator.
  8. Introduction 6-2021 7 A065T489 (Issue 1) Copyright © 2021 Cummins Inc.
  9. Senses the return of utility power.
  10. Retransfers the load to the utility.

Tools required

  • hone

Source: manual:RSS100-200_Owner_Manual.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.