RDC2
Frequency Low
Frequency low
Electrical · Shutdown
Shutdown. TP-7092: governed frequency falls below 90 percent of the system setting for more than 10 seconds, or 1 Hz below the setting for more than 60 seconds. Active 10 seconds after engine start. The check is to reduce the load and restart, check the enclosure thermostat, then call a dealer. OnCue Plus calls the related event Generator Frequency Low.
Seen on: 14RCA, 14RCAL, 20RCA, 20RCAL, 26RCA, and 26RCAL sets with the RDC2 controller (TP-7092).
Likely causes
- Overload pulling frequency down.
- Tripped enclosure thermostat.
- Fuel or governor trouble the dealer has to separate from a simple overload.
Checks an owner can do
- Shut off large loads and restart once.
- Check the enclosure thermostat only if you can do that without opening electrical compartments.
When to call a pro
A second trip with the breaker unloaded is a dealer diagnosis.
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
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Related Kohler codes
https://generatorcodes.com/brand/kohler/frequency-low