Solutions for faults of electrical control in generator set

When you use diesel generator set, do you meet electrical control system faults? If so, you should read this article.

1.Low oil pressure fault alarm or shutdown

A.Check the oil level;

B.Check oil quality and viscosity;

C.Check the oil temperature;

D.Check whether the oil pressure sensor is damaged;

E.Check whether the oil filter and oil circuit are blocked;

F.Check whether the oil pressure sensor switch alarm is correct.

2.Overspeed fault causes shutdown

A.Check the speed meter to indicate if there is any abnormality;

B.For mechanical speed control mechanisms, check the throttle lever for flexibility and ensure proper adjustment;

C.For the electronic speed control system, check if the throttle lever is flexible and check whether the actuator is operating correctly;

D.Recalibrate and adjust the overspeed protection limit;

E.Check if the speed sensor installation is reasonable;

F.Reset the alarm signal on the control panel after troubleshooting.

3.High voltage alarm

A.Measure the actual value of the unit's output voltage;

B.Confirm that the meter is not biased;

C.If the voltage is actually too high, you can check and re-adjust the AVR according to the steps.;

D.Confirm that the load property is non-capacitive and the power factor is not advanced;

E.Confirm that genset generator speed and frequency is normal;

F.If the real value of the voltage is normal, check whether the circuit part of the voltage display is correct;

G.Check whether the setting limit of the high voltage alarm is correct and reasonable.

4.Low voltage alarm

A.Measure the actual value of the unit's output voltage;

B.Confirm that the meter is not biased;

C.If the voltage is actually low, you can check and re-adjust the AVR according to the steps;

D.Confirm generator set speed and frequency is normal;

E.If voltage value is normal, check whether the circuit part of the voltage display correct;

F.Focus on checking whether the three fuses on the rear wall of the generator terminal box are normal and connected firmly;

G.Confirm that there is no large deviation in the three-phase voltage value;

H.Confirm that there is no phase loss;

I.Confirm that when the alarm occurs, the load changes little;

J.Confirm that the generator set is not overloaded;

K.Check whether the setting limit of the voltage high and low alarm is correct and reasonable.

5.Start motor, it can work, but the diesel generator can not drive.

A.Check the fuel level and make sure the tubing is properly connected;

B.For the mechanical speed control system generator set, check whether the throttle solenoid valve is properly sucked;

C.For the electronic speed control system diesel generator, check whether the EPG power supply is properly connected and the voltage is normal;

D.For the electronic speed control system genset, when the starter motor is running, use the electric meter to measure whether the MPU has the correct AC voltage signal;

E.Check whether the genset speed has reached or exceeded the set start normal speed;

F.Check whether the fuel delivery system is blocked;

G.Check whether the air filter is blocked;

F. In cold areas, should ensure electric generator is warmed up before starting.

6. High water temperature fault alarm or shutdown.

A. Check whether genset is overload;

B. Check the tightness of the fan belt;

C. After the diesel genset is completely cooled, check if the water level of the cooling water is sufficient;

D. Check whether the water temperature sensor is damaged;

E. Check whether the water temperature sensor switch alarm is correct;

F. Check if the thermostat valve opens correctly;

G. Check that the gap between the pump and the water tank is correct;

H.Confirm that the temperature in the equipment room is not higher than 40 °C.