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RDC2
Volts L1-L2 High
Generator voltage high
Electrical · Shutdown
Shutdown. TP-7092: output voltage exceeds 120 percent of nominal system voltage for more than 2 seconds. The only check printed is to contact an authorized dealer. OnCue Plus names the related fault Generator Voltage AB High in the TP-6905 cross-reference.
Seen on: 14RCA, 14RCAL, 20RCA, 20RCAL, 26RCA, and 26RCAL sets with the RDC2 controller (TP-7092).
Likely causes
- Output voltage stayed above 120 percent of nominal for more than 2 seconds.
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
Do not keep the set online. Voltage this high can damage loads. Regulator and sensing diagnosis is a dealer job.
Source
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/volts-l1-l2-high