Cummins/Onan — Control Board Replacement
Repair & overhaul
From a Cummins/Onan service manual covering: C13 N6H, C13N6H, C17 N6H, C17N6H, C20 N6, C20N6H, RS13A. Check it applies to your exact model before use.
Applies to: Cummins/Onan C13 N6H, Cummins/Onan C17 N6H, Cummins/Onan C20 N6, Cummins/Onan RS13A
Before you start
- Automated Machinery: accidental or remote starting can cause severe personal injury or death.
Procedure
- Shut down and disable the generator set; disconnect the negative (–) cable first, then the positive cable.
- Open the hood and make sure the hood latch drops into place.
- Remove the control access panel.
- Remove all wiring harness plugs from the control board, P1, P2, and the optional Ethernet cord.
- Remove the bolt retaining the control board. Remove and replace the control board.
- Re-install the 2 wiring harness plugs P1 and P2 only. Do not reconnect the optional Ethernet cord yet.
- Reconnect the generator set battery, positive cable first.
- Enter the serial number and product code from the generator set nameplate via the Nameplate Config screen.
- Set the generator output and fuel type in the Generator Config screen.
- Optional: Re-install the Ethernet cord into the control.
- Install the control access panel and close the hood.
Specs & values
- Model number must be in the 8-digit 'A054_###' format
Full service-parts list: Cummins/Onan C20 N6 →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.