How to reset FAIL TO START(over crank)?

heavy engine work goes like this. NO ENGINE TOLD or VIN.
after assembled. we

1. crank it after fuel pump fuse /relay pulled.
2. and measure oil pressure. first, if fail stop fix
3. then check for top end oiling. if not stop. fix.
4. then compression tests. all cylinders above 150psi and near equal.
5. fuse back (pump) crank
6. it if fail test spark. on all spark plugs
7. if fail see if IMMO dash light failng, if is spark will never happed,. nor fuel
8. ok spark is good
9. next is spray test fuel , ok runs for second stalls.
10. now engine starts. (if luckly there are other show stoppers (cats melted, EGR stuck open etc.,
11. if dead still add 5% throttle cranked, this hides dead IAC valve. (stuck closed)
12. to clear flooding crank 100 % WOT throttle .

Locked Rotor is reported as an overcrank fault "OC".

You first need to verify the engine fails to crank, which is likely a starter motor or start circuit failure.

If the engine cranks three separate times and then the OC fault occurs, it simply means the engine did not run... more likely a fuel issue.

But either can be caused by numerous reasons.

I don't think the over crank is a problem.
Why is it shutting off?
Find the owners manual to find out if there is some fault that will shut it down or it may be an engine problem like the choke not releasing after starting.
To find a manual online you will need the make and model number of your generator.

Maybe the start motor is damaged. You can check it first.

Power generation: www.dieselgeneratortech.com

If your generator cannot run normally, please follow the guide in this article to solve your problem.
If diesel generators fail to start, you can analyze the causes from fuel system failure, electric starting system failure, insufficient compression pressure in the cylinder and the low ambient temperature and other factors.
https://www.dieselgeneratortech.com/diesel-generators/why-diesel-generator-fail-to-start.html

Overcrank means that it tried to start and couldn't. It will go through 5 crank cycles and then stop with this alarm. Switch to off, hit enter to clear fault and then try to start in manual. Check to make sure you have fuel and pressure is 11 to 14 in WC.

Could be vapor locked. Prime the line and try again.

Hi CME, If I understand your description correctly your asking about a CAT engine. If it is controlled by an ECU and has any fault it will refuse to crank. The CAT people do that as a fail safe system. Carry out a diagnostic scan and carry on from the reading it gives you. Regards John

OC means OVERCRANK safety circuit stopped the auto start-up so you wouldn't burn up the starter. There is a reason the generator didn't start. Low battery, not enough fuel pressure, clogged air filter, bad starter... You just have to eliminate as many as you can visually. Rebooting the generator should clear the OC condition and you can try to start it manually.

The 'overcrank' error simply means it tried to start but never actually started. It cranked for an extended period. Check the fuel and starting issues you would normally check to start the engine.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c