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GENERATORCODES

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RDC2

Frequency High

Frequency high

Electrical · Shutdown

Shutdown. Governed frequency exceeds 110 percent of the system frequency setpoint for more than 10 seconds. TP-7092 says the function becomes active 10 seconds after engine start. The check column says to contact an authorized dealer. TP-6905 maps Frequency Over Shutdown to the OnCue Plus name Generator Frequency High.

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

Likely causes

  • Governor holding frequency more than 10 percent high for more than 10 seconds after the start inhibit.

Checks an owner can do

The cited source does not list a homeowner check for this fault. Leave the set off and use the note below.

When to call a pro

High frequency can damage clocks, motors, and electronics. Leave it off for a dealer.

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/frequency-high