Man D 0836 LE 401, Operating Instructions Manual

Page: 35 / 76

Commissioning and operation
35
System failure
The front plate of the device has a red LED with the description System Failure. This is
activated in the following two cases:
A Failure of the serial data from the Safety, Alarm and Diagnosis system MMDS in the
engine terminal box. In this case, LED “Alarm” also flashes and the message “System
Failure” appears on the alarm screen.
B Fault in the LCD monitor itself. In this case, no other message appears.
Key functions
The front of the device has 5 keys that enable various functions such as scrolling, con-
trast adjustment, alarm acknowledgement and menu control. The keys have the following
functions: Standard, Test, Menu and Special functions.
Horn-Quit: Standard function: acoustic acknowledgement or deactivation of the
internal horn; All other monitoring devices in the system are acknow
ledged via the serial bus.
Test function: Holding the key for at least 5 seconds activates the
built-in buzzer.
PRG -menu function: adopt currently selected setting (Prg=Programm)
Visual Quit / Test: Standard function: visual acknowledgement, i.e. all flashing alarm texts
in the currently visible alarm screen switch to constant representation
if the horn was acknowledged beforehand; the red alarm LED integra-
ted in the front plate is also switched from flashing to continuous ligh-
ting. All other monitoring devices in the system are acknowledged via
the serial bus.
Test function if there is currently no alarm and / or all issued alarms
have been visually acknowledged beforehand:
Lamp test, i.e. the
three LEDs in the front plate are activated as long as the key is pres-
sed.
Special function: see explanation of key
+ − menu function: Shift selection cursor to the right or increase input
value.
Prg
T E S T
P A G E