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Operation of the display device MMDS-L
The display device has the following operating keys:
Switches off the alarm horn and the integrated buzzer
Switches off the flashing signal of the relevant warning lamp, i.e. the flashing light
switches to continuous light. Before the flashing signal is cleared, the alarm horn
must be switched off.
Clears the alarm message (red warning lamp goes out)
Requirement for clearing an alarm message is:
− Pressing the keys "Horn off" and "Test" in that order
− Removing the cause of the alarm
− In the event of a reduction alarm the engine speed must be brought down
below 800 rpm in order to be able to reach higher speeds again
− In the case of a stop alarm, the alarm can only be deleted if the engine is at a
standstill
Function test of the warning lamps
If there is no alarm, the warning lamps can be tested.
When the "Test" key is pressed, all the warning lamps must light up
Dimming
All alarm LEDs are dimmed automatically depending on the ambient brightness. A photo-
electric element integrated in the front plate ensures this.
Horn test
If the 'Clear horn' key is pressed for approx. 5 seconds, the fitted buzzer as well as poss-
ibly horns fitted at the shipyard go off.
System Failure
Two failure states are distinguished and indicated by the failure LED flashing or lighting
up continuously:
A flashing System Failure LED signals a communication fault, i.e. the data bus is inter-
D
rupted or there is interference. In this case, the seating of plug-in connections for the
MMDS-L and the serial distributor MMDS-SD are to be checked.
Continuous lighting up of the System Failure LED indicates an internal fault. If this
D
state remains after switching off and on again, the device is defective.
Commissioning and operation
27
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