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Service Manual
Third edition, June 1997
• Test running. The LCM asks the LCS for a test signal
which is processed and compared with an expected test
result. It should show 14949±10 when it is OK. If it is
not OK, there will be a LCS failure alarm.
• Sweep counter. The sweep counter indicates that the
LCM is working. It count ordered sweeps. Check that
the sweep counter is counting to see that the board is
operating. Check also the Sweep error LCM-status box
in the LCI Status-window described below.
• Schedule status. Shows the setting in the Transmitter
Service window. 0 is the normal mode. A 1 means that
every second sweep is done on one of the tanks and the
other sweeps are done on the other tanks. 2 means that
this is the only transmitter that is measuring. The tank
is selected and the schedule mode is set in the Transmit-
ter Service-window. However, in the Transmitter Data it
is possible to select mode 0 or 2 for a selected tank.
• Service status and Service code. Both of these values
can be used by the Saab service engineers. They are of
no use to the crew on board the ship.
• LCS status. Shows the status of the LCS. 0 means that
the LCS is OK, while a 1 indicates that the LCS test
failed.
The LCM system and memory status boxes show:
• Def DB loaded. The checksum of the database is calcu-
lated at startup. If there is some error, the default data-
base is loaded and this box is checked. When this box is
checked, a warning appears on the Work Station. See
also chapter 9.1.7.
If this box is checked, download database from Work
Station to LCM. The Level Unit restarts automatically
when the downloading is finished.
Restart the Level Unit (see chapter 5.3), to see that
default database has been loaded. If the Def DB loaded-
box is still checked after restart, the memory on the
LCM board is faulty and the board needs to be re-
placed. See also chapter 9.1.7.
• LCM RAM error, LCM Flash error, LCM EEPROM
error and LCM EXTRAM error. Each time the LCM
restarts, the memories are checked. None of these boxes
should be checked. If any of these boxes are checked,
exchange the LCM.
The database window shows:
• Prio scheme. A 0 means that each tank is measured one
after the other. However with a 1, the tanks that have