FREQUENCY HIGH
Gillette
High Output Frequency
Controller displays FREQUENCY HIGH or HZ HIGH while running.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Governor setpoint too high, Sticking throttle linkage, Faulty speed sensor feedback
How to Fix / Troubleshooting
Safety first: Isolate the generator from the load and shut it down before adjusting any governor components.
Steps:
- Verify reading: Use a calibrated frequency meter to confirm the controller reading. Target is typically 60 Hz at rated load.
- Inspect linkage: Check the throttle and governor linkage on the Gillette engine for binding or misadjustment. Ensure return springs are intact.
- Adjust governor (qualified personnel only): Follow the engine manufacturer’s procedure to slightly reduce the no-load speed setting so that frequency is correct under load.
- Speed sensor: Inspect and clean the engine speed sensor. Replace if the signal is erratic.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Engine Speed Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements