What safety caused the alarm. if you cant restart it, it may be cause the problem that originally shut the engine down has not been fixed, it could be water level, low oil, high water temp, low fuel,over voltage, all of the above are probably run through the safeties. over volt, and water temp would probably clear its self after it sat a while. try turning off power to panel. for a couple minutes and see if it will reset, if not check water level. and oil levels
Diesel Generator Start-up Failure or difficult to start should check the following causes.
1. Failure phenomenon
a. No explosion sound in the cylinder, white smoke from the exhaust pipe;
b. Black smoke from the exhaust pipe.
Practice has proved that in order to maintain the smooth start of diesel generators , four necessary conditions must be met: a. It must have a certain speed; b. The oil and gas circuits must be unobstructed; C. The cylinders are well compressed; d. The fuel supply timing. From the above prerequisites for starting a diesel generator, it can be inferred that the diesel generator cannot start or is not easy to start.
2. Failure cause
Diesel engine speed is low; a. Starting speed is too low; b. Improper adjustment after pressure reducing device is not put into the correct position; c. Improper adjustment of valve clearance.
The oil and gas paths are not smooth; a. There is no diesel oil in the fuel tank, the oil pipeline is blocked, the fuel filter element is blocked, and oil switch is not open; b. When the diesel engine is started, the ambient temperature is too low; c. There is water or air in the oil path; d. The fuel injection nozzle is poorly sprayed or does not spray fuel; e. The air filter element is blocked or dirty.
Cylinder compression is not good; a. The clearance between the piston and cylinder wall is too large; b. The piston ring is broken or the elastic force is too small; c. The intake and exhaust valves are not closed tightly.
The fuel supply is not correct; a. The injection time is too early (it is easy to kill the injection pump) or too late; b. The valve distribution is not on time.
This article will be helpful for this issue. https://www.dieselgeneratortech.com/diesel-generators/diesel-generator-start-up-failure-causes.html
The diesel generator set cannot be started first to find out the cause and then to troubleshoot according to the cause. There are many reasons why the diesel generator set cannot be started in the actual situation. The following items are for reference only.
1. No fuel or insufficient fuel;
2. The engine cylinder cooling water temperature is low;
3. The battery voltage is low;
4. The injection oil pump has air;
5, start the motor failure;
6. The control loop is faulty.
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