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©2013 Technical Marine Service, Inc. LC-100 V2.97
Button Valve
ENTER Supply
DOWN Specific Gravity
MENU Tank Sense
UP Differential Pressure
ACK Drain
All valves will be de-energized when this test mode is entered. With the LevelCom 100
connected to its air supply press ENTER to open the Supply valve. The drain valve is open
when de-energized so air should blow out of the Drain when the Supply valve is opened in
this test. If this doesn’t happen, first verify that the proper air supply pressure is present. If
there is too high a supply pressure present the Supply valve may not open (it will be held
closed by the air pressure). Check that the LED on the small valve interconnect circuit board
lights when the button is pressed (try the other buttons to see if any LEDs light). If the supply
valve is working, the drain valve may be plugged. Inspect the clear tubing running from the
top of the Drain valve to the aluminum manifold to see if there has been any contamination
present. If the valve is plugged it will have to be replaced.
Inspect the clear tubing running from the manifold to the sensor. If there is any
contamination in this tubing it may be the problem. Any liquid that has accumulated in the
tubing must be removed.
It is also possible that the supply valve is leaking. This is easy to detect in the valve test
mode. If the supply valve is leaking there will be a steady flow of air out of the de-energized
drain valve.
If everything checks out at this point and the error condition still appears then the sensor
circuit may need calibration. It is possible that the sensor has failed. The calibration
procedure will detect this. See the calibration procedure in this manual. Calibration should
be done only after all other possibilities have been exhausted.
Instrument displays EEPROM FAILURE.
This message indicates trouble with the EEPROM (Electrically Erasable Programmable Read
Only Memory) memory that is used to hold the LevelCom 100 configuration. If this message
occurs when the LevelCom 100 is powered up it means that there were problems reading the
configuration from the EEPROM. If this message occurs when changing the LevelCom 100
configuration it means that there were problems detected while writing new information to the
EEPROM. In this case the new information was not completely stored, but the old
information was probably at least partially modified. The message could mean that there has
been a true electrical failure of the EEPROM, however this is not the only possibility. The
following will describe some tests to determine the cause of the problem.
Turn the LevelCom 100 off and after a short time restore power. If the message does not
appear this time it may indicate that the problem was caused by electrical noise getting into
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