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RDC2

Locked Rotor

Locked rotor

Engine · Shutdown

Shutdown. TP-7092: no engine rotation is sensed during cranking. It shuts down 3 seconds after the fault is detected. The check is the battery, loose connections, then a dealer. OnCue Plus uses the name Locked Rotor for the matching RDC2 event.

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

Likely causes

  • Battery too weak to turn the engine.
  • Loose cables.
  • A starter or engine that is not rotating, which is why the manual does not stop at the battery.

Checks an owner can do

  1. With the generator off, tighten loose battery cables and look for heavy corrosion.
  2. Do not hit the starter or bypass the solenoid.

When to call a pro

If the engine still does not rotate, a Kohler dealer has to test the starter and the engine.

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/locked-rotor