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Dalian Puyang

Reasons and treatment methods for diesel generators unable to stop

The failure of the diesel generator set to stop may be caused by the overhaul period, the shutdown solenoid valve out of control, the electronics (mechanical governor failure), and the failure of the oil engine control instrumentation. method.

(1) Reason: The unit has entered the overhaul period

Treatment method: Overhaul unit

(2) Cause: The self-starting unit, the ATS start signal is cut off, the unit is still running

Treatment method: The condition is normal, and the unit will shut down after entering the cooling operation.

(3) Reason: Stop solenoid valve is out of control

Solution: Check whether the wiring is correct, and replace the solenoid valve if necessary

(4) Cause: Electronics (mechanical governor failure)

Handling method: please authorize personnel to repair

(5) Reason: After the key switch is turned off on the control screen, press the stop button.

Solution: Incorrect operation, you must press the stop button before turning off the key switch

(6) Cause: Failure of control instrument of oil engine

Treatment method: maintenance or replacement

Cause: Fuel, air filter is blocked

Treatment method: check, replace the three filters regularly

Cause: Electronic governor failure

Handling method: please authorize personnel to repair

Reason: Shutdown solenoid valve protects the shutdown action

Handling method: check the alarm content (code) to eliminate the shutdown failure

Reason: Unit control screen (system) failure

Treatment method: Check the control panel of the unit according to the instruction manual of the control screen

Cause: One of the fuses in the junction box is disconnected

Treatment method: Press the button on the fuse to reset the fuse

Cause: Poor contact / open circuit

Treatment method: Eliminate any open circuit / poor contact failure, check the connector for oxidation, and clean if necessary

Reason: Stop button malfunction

Solution: Replace the stop button

Cause: Malfunction of shutdown solenoid

Treatment method: check / replace the stop solenoid

Cause: The fuel shutoff valve is malfunctioning.

Solution: See "Possible failure of fuel shut-off valve"

Cause: Blocked oil return pipe

Treatment method: check if the oil return pipe is blocked, twisted or sunken