I have a locked rotor fault message.

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.

Emergency shutdown operation is required when one of the above conditions occurs in diesel generator set.Diesel generating set itself has an emergency stop button, at this time, press the emergency stop button or quickly press the stop control handle of fuel injection pump to the stop position, the diesel generator will quickly cut off the load, and immediately close the throttle, while the red "emergency stop" light is on. Need to press the button again to delete the emergency stop signal. If there are serious faults or distribution faults, you can also press the button on the control panel, and the unit will stop immediately.

In fact, all faults always give operators some warning signal before spare parts break down or engine damage occurs. So the operators need to be smart, and notice alarm signals (sudden drop in oil pressure, abnormal sound, etc.) and immediately stopping the engine.
Emergency shutdown operation is different from normal shutdown operation.
Emergency shutdown operation.Once the operator finds that there is a serious fault or distribution fault in thediesel generating set, he can press the emergency stop button of the control panel to stop the unit immediately. If there is no special circumstances, we advise users not to stop the unit at will through the emergency stop button.

not enough information to answer. gas or propane?. if new,generator by it's very nature generates energy,and thereby heat. even coiled wires can get warm. what part is hot?
if you've owned it a while, and it is inordinately hot as compared to prior uses, is it lubricated ? running normal otherwise?

Check rotor skip rings for cleanliness, rotor brushes. Stator resistance, rotor resistance. If ok then change control board

You need to measure the rotor and stator for correct resistance and shorts. You will need a good ohm meter and teh exact readings mostly on a rotor approx 22ohm and stator can be less than 1 ohm, but zero ohms to ground on any lead or ring

This generator has a built in transfer switch. If you do not have an external source of 240 volts going in to the unit (utility power), the transfer switch will show a fault or "abnormal" reading. If you do have utility power going in to the transfer switch, and the generator is on then you have a faulty transfer switch. It is time to warranty or get a replacement switch.

Check rotor slip rings,brushes then rotor and stator for shorts

You do not say what type/model generator you have, so I will just give you some basics.

There is nothing wrong with the magnets. Their power did not change at all, their pwer never changes, except to degrade slightly over time (hundreds of years.)


The generator rotor is hitting the stator. In other words, the alignment of the rotor inside the generator is off center, making the rotor bind on the inside of the stator, resulting in a lock-up.

With the generator attached to the motor, remove the generator end, and slowly try to turn the engine over by hand. REMOVE THE PLUG WIRE FROM THE PLUG FIRST, so that the engine cannot start. Watch inside the generator, and discover why the generator rotor is not aligned. Pehaps the bearings were installed incorrectly, or the housing is installed incorrectly. Most generator engines have a tapered power-takeoff shaft, where the gen. shaft connects to it. Is this Bolt tightened to specifications? Is there some debris floating around in the gen. (such as a screw, or a pebble, or a nut) that would impede its movement?

good luck

forget about the display read the manual and find out how many volts are needed to charge the battery....then
get a voltometer and disconnect the terminals from the battery and connect them to the voltometer while the generator is running...
find out what the reading is...if the reading is zero (0)...then post a problem on (no out put)...
if not.....then there has to be a mistake...
if it reads a voltage thats too low..then you AVR card is burnt out (AVR card is located in the other end of the generator (beyond the stator-side cover)...

Check for dirt dobbers or trash in speed control mechanism.