The possible causes include the blockage of the oil supply pipeline, the failure of the oil pump, and the leakage of the oil supply pipeline. Remove the high-pressure oil outlet pipe to check the pump oil condition. Normally, the oil column should be ejected outwards.
Another reason for the injector failure is that the fuel cut-off solenoid is not energized. When the oil cut-off solenoid valve loses power, even if the oil pump operates normally, the high-pressure end will not supply oil to the fuel injection nozzle. Only after the controller energizes the oil cut-off solenoid valve, can the diesel be ejected. The purpose is to prevent the original diesel stored in the furnace from deflagration in case of open fire. Under normal circumstances, the burner will conduct pre blowing before ignition, blow out the residual diesel in the combustion chamber, and then spray oil for ignition. In the pre blow stage, although the oil pump motor is running, the oil cut-off solenoid valve is not energized, and the high-pressure diesel oil pumped by the oil pump is cut off by the oil cut-off solenoid valve and cannot reach the fuel injection nozzle.
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