Yamaha EF1000iS / EF2800i — G.F.C.I. Receptacle Test
Operation
For the Yamaha EF1000iS / EF2800i, from the Yamaha owner's manual.
Before you start
- Do not operate the generator with a faulty G.F.C.I. circuit
Procedure
- Start the engine
- Press the test button, then check the position of the reset button
- If G.F.C.I. operation is correct, push in the reset button
Source: Yamaha owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.