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Precautions at Slow- and Shut-Downs

In the event of a slow- or shut-down occurring, the appropriate lamps light up on the bridge telegraph and in the signal panel for emergency in the control room. If, with regard to the safety of the vessel, it proves necessary to start the engine again, the "cancel" button on the bridge telegraph can be activated. Since this is an emergency function, it will immediately release an alarm in the engine room.

Precautions at Slow- and Shut-Downs

If it is not imperative for the engine to run, the fault should be rectified before the engine is stated again. When the fault has been rectified, the reset button is pressed on the control room.

When this button is activated, the slow down circuit will be reset, and the engine will be automatically regulated up to the position of the handle. In the case of a shut-down, the engine will be automatically restarted after reset and the engine will regulate up to the value at which the bridge telegraph is set to.

Reset of a slow- or shut-down can also take place from the bridge by placing the telegraph on the bridge in stop position. An automatic reset order is thereby transmitted to the control panel, and if the slow- or shut-down condition has vanished automatic restart can be done by placing the telegraph in an arbitrary position.

However, it should be noted that it is only a reset arrangement. If the slow- or shut-down condition is still present, an automatic start can only be done by cancelling with the emergency buttons.

If an overspeed shut-down occurs, such a condition cannot be cancelled from the bridge by means of the cancelling button, but only by means of the regulating handle in the control room which has to be in the stop position.

When an overspeed shut-down has occurred, it should be noted that the fault could be due to a fault in the governor, or a fault in the remaining part of the manoeuvring system. In the case of an overspeed shut-down, the manual regulating system should be examined before the engine is allowed to start again and run to load.

A slow-down or shut-down can be due to a fault in the pressure switches or thermostates alone, without the measured value indicating a fault.

The contact for the appropriate channel can therefore be pressed in on the safety panel, thereby placing the channel out of action. This should, however, be carried out only whilst the pressure switch or thermostat is being replaced or repaired. A fixed light will appear in the safety panel whilst the channel is coupled out. It must be noted that such switching off a channel cannot cancel a slow- or shut-down. The reset button on the signal panel for emergency must always be pressed in afterwards.