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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.
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