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10. TROUBLESHOOTING
10-1 No AC output
* Checking the exciting coil for resistance. (RGV12100) (Refer to 8-6.)
If insulation is NG, replace exciting coil with new one.
* Checking the brush and slip ring of rotor for resistance. (Refer to 8-5 and 8-7.)
If insulation is NG, replace brush and slip ring with new one.
* Check stator for winding resistance between terminals. (Refer to 8-4.)
If stator is faulty, replace with new one.
* Checking stator for insulation resistance. (Refer to 7-3.)
If insulation is NG, replace stator with new one.
* Checking the A.V.R . (RGV12100) (Refer to 8-8.)
If insulation is NG, replace A.V.R with new one.
* Checking the diode unit and C.T . (RGV13100T) (Refer to 8-9 and 8-12.)
If insulation is NG, replace diode unit and C.T with new one.
10-2 AC Voltage is too high or too low
* Check engine speed.
Nominal engine speed at no load ; 3,700 to 3,750 rpm
If engine speed is too high or too low, adjust to the rated rpm.
* Check stator for winding resistance and insulation. (Refer to 8-4 and 7-3.)
* Check rotor for resistance and insulation. (Refer to 8-5 and 7-3.)
* Checking the idle control unit. (RGV12100) (Refer to 8-11.)
If insulation is NG, replace idle control unit with new one.
10-3 AC voltage is nominal at no-load, but load cannot be applied.
* Check engine speed.
If engine speed is low, adjust to the rated rpm.
* Check total wattage of appliances connected to generator.
If the generator is overloaded, reduce the load to the rated output of generator.
* Check appliance for trouble.
If the appliance is faulty, replace it.
* Check if engine is overheated.
If generator cooling air inlet and/or outlet is clogged with dirt, grass, chaff or other debris,
remove it.
* Check insulation of generator. (Refer to 7-3.)
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