Coleman 5000 generator will not idle up under load

it does not idle when not loaded, generator have to run open to produce power when needed. contact mfg. for more into

Idle control comes into play when there is no power draw forcing the engine to idle with an electro magent. If you feel that the electro magnet is interfering with governor, temp remove the wire to the solenoid. Usually the idle control will not effect how the engine /gen output power. An overloaded condition will cause the engine the go the full throttle as the internal governor of the engine will try to maintain 3600 rpm. Overloaded condition will greatly shorten the life of the generator/engine. Try to use only about 80 % of rated power. Large motors can draw three times running amps. A compressor using 12 to 18 amps to run can draw over 40 amps to start.
If your generator could handle the load in the past, check the engine for loss of power, or the generator for faulty voltage regulator or capacitors out of range. Easy to check. Connect digital volt meter to plug /load and look at volt reading while running with no load and loaded. Voltage should stay between 110 to 120 under load and with no load (unless goes into idle mode). Good luck

Make sure the governor is working properly. When you put a load on it the engine should increase in speed slightly. Make sure the engine is running at the correct speed 3600 rpm. Try plugging in an item that draws less power such as a electric drill and see how the generator behaves. Also make sure the engine runs smooth while not under any load. Check the voltage from the outlet to make sure it is putting out 132 volts not under load.

Voltage is adjusted by raising or lowering the engine speed (governor adjustment), however one must also pay attention to the rpm because your generator was designed to produce 120 volts at 60 cycles while turning 3600 rpm. Your electrician should have tested for htz while testing for voltage. I would recommend re-testing under load and adjust governor to turn 60 cycles to see resulting voltage.

Are you sure your gen.set is Coleman. The 5000 W gensets of Coleman as far as I know do not have auto idling. If your has, check this:
If by the same load it was accelerated ones (before) you may have problem with current measuring circuit.

Try does it run up with bigger load. It may not go up with loads less than 100 W. It has a big hystheresis on droping down (at less than,about 50 W) and running up (at more than 100 - 150 W).

If this can not help you give some more details in testimonials field in order to give you more instructions.

I could not understand, it doesn't go in low idle when load is connected or no?

It should go to low speed idle with load under 20 - 30 W.

govenor problem maybe does the engine sound slower when a load is on.
you will need something to read the power frequency

3000 rpm produces 50hz uk
3600 rpm produces 60hz

so if you have a meter to measure frequency you will also know what speed the engine is running at

It should read 115v-120v with full load. Yes, you can slow the engine down just a little, depending on the engine, there will be a high rpm adjustment. 130v with full speed, no load, is really not too bad.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

You may have just lost residual magnetism in your rotor. Start genset then apply 12 vdc to 120 v outlet for less the 1 seconds. This will be enought to restore the residual magnetism to the rotor and the unit should be producing power now.

Your RPM's are too high. There is no voltage regulator in coleman generators (generator is actually made by generac) and is 100% dependent on engine speed. There is a screw under the tank when your looking in from the recoil side. It controls the governor arm. Screw it in and it incresses the rpm, out decrease. Plug something in that draws a decent load while setting the rpms since you want it to put out 120 and 240 underload. Your idle voltage does not matter.