Cummins/Onan — Converting Transfer Switch Phase Setting (Control Package B Only)
Adjustments · Electronic control transformer jumpers
From a Cummins/Onan service manual covering: LT 100, LT 150, LT 200, LT 260, LT 30, LT 60. Check it applies to your exact model before use.
Applies to: Cummins/Onan TGHAA
Before you start
- AC voltages and currents present an electrical shock hazard that can cause severe personal injury or death. Make sure that both AC power sources are disconnected.
- Incorrect placement of transformer jumper wires can cause damage to the control when power is applied.
Procedure
- Disconnect both AC power sources (Normal and Emergency).
- Place the 3-Phase/1-Phase switch (S1) on the control circuit board in the appropriate position.
- Place the transformer jumper wires on the control board in the appropriate positions (refer to sheet 3 of the schematic and wiring diagram package).
Full service-parts list: Cummins/Onan TGHAA →
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.