Cummins/Onan — Rupture Basin Leak Detect Switch Test
Testing & diagnosis
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQAD, Cummins/Onan DQAE, Cummins/Onan DQAF
Procedure
- Remove the pipe fitting/switch assembly from the rupture basin tank.
- Move the O/Manual/Auto switch to the MANUAL position.
- Activate leak detect switch (move float upward).
- Check control display for Rupture Basin fault message.
- If no indication of fault, repair defective circuit.
- Apply thread sealant to pipe fitting and install switch assembly.
Specs & values
- Check once a year; weekly inspections may be required by safety code regulations in some areas
Full service-parts list: Cummins/Onan DQAD →, Cummins/Onan DQAE →, Cummins/Onan DQAF →
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.