The invention relates to the use of a first coding or decoding rule for a normal operation and of a second coding or decoding rule for a particular operation.

This applies in particular to operation in darkness.

The two groups vibrate only slightly when operating normally.

The control system can facilitate substantially constant speed operation of the generator in the presence of variable operation of the engine.

An incorrect operation of the NOx control measures or a failure of the emission control monitoring system is selected by the authority within a list of incorrect operations provided by the manufacturer.

This precludes superposition even in case of synchronized base station operation.

When the operation is correct, the sum of the squares of said two signals is constant.

Tell-tale optional; where fitted, this tell-tale must be an operating tell-tale consisting of a non-flashing warning light which comes on in the event of the malfunctioning of the stop lamps.

Tell-tale optional; where fitted, this tell-tale shall be an operating tell-tale consisting of a non-flashing warning light which comes on in the event of the malfunctioning of the stop lamps.

In the case of an abnormal operation, that is, in an abnormal state, the fire alarm (3) finishes an operation confirmation test without delivering a sound.

The switching circuit itself operates in particular also when the neutral line has been interrupted, in the case of a high loop resistance and in that of two-phase a.c. operation.

Finally, a pressure accumulator prevents a collapse of the pressure during an abnormal pumping operation.

During normal operation of the sliding door the pretensed rubber belt (6) has no effect.

Thereby, even at the low rotation rate operation, oil is raised reliably to compressor unit, offering a highly reliable compressor operation.

In the event of an indicator malfunction the tell tale shall; go off, stay on or change frequency.