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RDC2

Low Oil Level or Oil Pressure

Low oil level or oil pressure

Engine · Shutdown

Shutdown. On the 26RCA the oil-level switch indicates low oil level. The low-oil-pressure switch indicates low oil pressure for more than 5 seconds. TP-7092 says the function becomes active 30 seconds after crank disconnect. The manual's own note: the low oil pressure shutdown does not protect against low oil level, so the oil still has to be checked on the schedule. OnCue Plus calls the related RDC2 event Low Oil Pressure.

Seen on: 14RCA, 14RCAL, 20RCA, 20RCAL, 26RCA, and 26RCAL sets with the RDC2 controller (TP-7092).

Likely causes

  • Low oil level, including the 26RCA level switch.
  • Oil pressure below the switch point for more than 5 seconds after the 30 second inhibit.
  • The level switch, pressure switch, or their wiring.

Checks an owner can do

  1. Engine off: check for leaks and add oil if the level is low. Do not overfill.
  2. Do not run the set if the fault returns after the level is corrected. That is the manual's instruction.

When to call a pro

Switch and wiring tests, and any case where pressure may actually be low, are dealer work. An oil-pressure shutdown is not a sensor to bypass.

Source

Kohler TP-7092 9/23e, Operation manual for 14/20/26RCA and RCAL residential generator sets with the RDC2 controller, fault-message table.

Wording follows that document. Firmware can change a threshold. If this page and the manual shipped with your unit disagree, follow the manual.

What fixed mine

No approved reports for this code yet. Send one. It stays in the review queue until it is approved.

Related Kohler codes

https://generatorcodes.com/brand/kohler/low-oil