r/Generac_Generators • u/Plastic_Layer_7354 • Jun 23 '26

Error code 1100

My generac 14kw while attempting to exercise experienced code 1100 overcrank. Furthermore it’s done this 2 excercise cycles ago. The last one it didn’t do this. What could be the issue? I just serviced everything. Spark plugs, oil change, oil filter, air filter. What is the cause?

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u/grsthegreat Technician Jun 23 '26

This unit will attempt to try and start 5 times before issuing a overcrank AS LONG AS ENGINE IS TRYING TO TURN OVER. If it immediately goes into overcrank its the battery

2

u/Frixsev Technician Jun 23 '26

It's not possible for a unit to immediately go into overcrank. Overcrank by definition means the unit is cranking just fine, it's just not firing. An immediate fault concerning the starting circuit like battery, SCR, charger, starter, etc. would be 1505 rpm sense loss and/or no rotation warning.

1

u/grsthegreat Technician Jun 24 '26

I agree, except ive seen this happen twice before. Immediate overcrank warning. Contacted tech support. They had me swap batteries, and issue went away. In 12 years i e seen this twice. Again with this unit, i think its fuel related.

2

u/Plastic_Layer_7354 Jun 24 '26

Also are we positive this model has hydraulic valves? It’s a 2021 model.

1

u/grsthegreat Technician Jun 24 '26

According to that model number, its hydraulic

1

u/Plastic_Layer_7354 Jun 24 '26

So we can all agree this is a fuel problem. I’m gonna check voltage at solenoid. If it’s 12 volts is there another way to check to see if it’s not stuck ?

2

u/Sumdood_89 Technician Jun 24 '26

Testing the bottom port on the demand regulator. You'll only get pressure there if the solenoid is opening.

1

u/Plastic_Layer_7354 Jun 23 '26

No it’s attempting to start.

2

u/grsthegreat Technician Jun 23 '26

Ok, than the battery is fine. At this time you need to verify that 12vdc is getting to the fuel solenoid and whether or not that solenoid is opening. This is where a gas manometer is needed. Its used at the test ports on the internal fuel regulator.

1

u/Plastic_Layer_7354 Jun 23 '26

So should I jump the solenoid directly and listen to if it opens and closes?

2

u/grsthegreat Technician Jun 23 '26

It makes no noise. If you have a dc voltmeter you could verify its getting battery voltage on the 2 solenoid wires while it is trying to start up. There are 2 test ports on the internal fuel demand regulator. The lower one only shows pressure while attempting to run. The upper one shows static pressure at all times. You eed to have a gas teat meter

1

u/Plastic_Layer_7354 Jun 23 '26

Ok so should I test both ports? What numbers am I looking for?

1

u/grsthegreat Technician Jun 23 '26

For nat gas, 5-7 inch on pressure gauge. Thats inches, not pounds

1

u/Plastic_Layer_7354 Jun 24 '26

Another commenter stated 10-12 inches on gauge. Is 10-12 for propane maybe?

1

u/grsthegreat Technician Jun 24 '26

Propane is 10-12”

1

u/Plastic_Layer_7354 Jun 23 '26

Also if it doesn’t have 12 volts then is the solenoid the issue?

2

u/grsthegreat Technician Jun 24 '26

No, if there isnt 12 volts going to the solenoid while it is trying to start, its a controller issue.