Page 78
©2013 Technical Marine Service, Inc. LC-100 V2.97
Troubleshooting
The LevelCom 100 is programmed to monitor certain system functions and to display error
messages when abnormal situations are detected. These functions include:
1. Supply Air Pressure - High or low pressure.
2. Sense Line - Plugged or leaking Sense line system.
3. Internal functions - Sensor zero and
4. EEPROM functions.
The following details some of the problems, which may be encountered and corrective
actions to be taken.
Note: The LevelCom 100 is a delicate electronic instrument. Qualified individuals must
perform repairs and troubleshooting.
Instrument displays CAN’T ZERO SENSOR.
The LevelCom 100 does a power on self-test when it is powered up. Among other things,
the zero offset of the sensor circuit is read and stored in memory. The zero offset is
expected to have a value near a pre-calibrated value. This zero offset measurement is also
performed approximately once every half hour of operation. If the measured zero offset is
outside a specific range, this error message is displayed. There are a few different causes of
this condition.
Probably the most common cause is water condensed in the supply air system. The
LevelCom 100 runs a purge sequence periodically to clear the bubbler pipe and remove
accumulated water from its internal pneumatic system. However if the machine does not
purge often enough (the purge timing is programmable) water may accumulate faster than it
is removed from the system. This case can easily be verified by disconnecting the supply air
tubing to see if there is water present in the supply air. Drain any water from the air supply
lines and regulator, and reconnect the LevelCom 100. When the LevelCom 100 is powered
up, the condition should not appear.
It is also possible that the drain valve is not functioning. It may be partially or completely
blocked with foreign material, or the electrical system may not be operating the valve at all.
To test the valves enter the CALIBRATE menu (See the Configuration Flow Chart) and select
VALVES. The front panel buttons will now directly operate the valves as listed below:
To Next Page
Loading...