Cummins-Onan QD 6000/7500/8000 (HDKA) error code 23 (QD HDKA)
Faulty oil pressure sender: the switch was still open during start (not a running fault). Bypassable before Spec F; from Spec F it is enabled 20 seconds after the set stops and declared during start.
What to check, and in what order, is in the app. The flow Onan QD 6000 / 7500 / 8000 (HDKA inverter) - blink codes and symptoms walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Cummins Onan Service Manual, Onan Generator Set for RV, HDKAH/HDKAJ/HDKAK/HDKAT/HDKAU/HDKAVCummins Onan
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