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You can changes to Auto mode.
Some generator has auto mode and manual mode. In generally, emergency generators have these two actions, when power grid is cut off, the generator will connect to machine automatically, then supply power to the machine.
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If you have a Yanmar engine... There is a hose that is connected to the oil pan in place of the drain plug directly under the oil filter that will have an end cap. This hose is used to drain the oil into a waste container. Download the service manual located at the address below and follow the instructions in the manual. http://www.martindiesel.com/Documents/New%20TNV%20DIRECT%20Service.pdf Hope this helps.
From the manual these are the protection circuits.
• Engine protection: low oil pressure, high engine temperature.
• Genset protection: under/over voltage, overload, battery charger failure, battery voltage out of limits,
under/over frequency, start failure.
• Circuit breaker protection: IV poles.
• Differential protection.
Any one of them will trip the fuel relay closed. What you may be able to do is disconnect one at a time each protection circuit and see when the fuel relay opens. (Make sure to reconnect each one if it had no effect on the fuel solenoid)
Once you isolate which circuit it is in then you can chase wires or change the bad switch.
There are two 14mm bolts on both sides (lower) of the motor. Unscrew one or both and drain the oil....Replace with sae 30 or 10w30 oil and should take almost a quart. (Put the bolts back in and tork slightly.) Check oil level.
I had the same problem with a simular generator. I took it to a repair shop who told me it was the "low oil sensor". They fixed it and it lasted another 1.5 hours. I told my-self I would monitor the oil and cut the "low oil sensor" electronic line. It has laster 12 years as a backup generator running at least 200 hours per year. I still have it but have switched to a larger generator. If you, or whoever uses it, can watch the oil level, then cut this line, it will be fine. This sensor is for those who are not able to measure oil level !!!
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