Part 2: Solutions for faults of electrical control system of diesel genset

4.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.

5.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.

6.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（Automatic voltage regulator) 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.

7.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.