Class1 106759 - ITL 4LT with 1-wire COM 106296 106299 - Manual (Page 15)

Intelli-Tank Manual (106759)071006 – 15 – Class 1
Condition Evaluate
Bottom two LEDs
alternate flashing.
Unit fails self test,
LED 1 flashing.
Check transducer wiring. Ensure +5V at pin A, ground at pin B and
at least .4V at pin C (Signal).
Top two LEDs
alternate flashing.
Unit fails self test,
LED 1 on.
Check transducer wiring. Ensure +5V at pin A, ground at pin B and
no more than 4.8V at pin C (Signal).
Middle two LEDs
alternate flashing.
Perform self test. If it fails with LED 3 on replace unit.
Outer two LEDs
alternate flashing.
Try to recalibrate. If condition remains, check if transducer signal
voltage (pin C) changes as tank level increases. If it doesn’t, replace
transducer. If it does, verify depth of tank. It may be impossible to
calibrate a tank with a depth of less than 6 inches.
Bottom two and
Upper two LEDs
alternate flashing.
The unit is configured as a Remote. If it required to be a Master
then recalibrate. If the unit is required to be a Remote check Data
line (Pin 4) continuity and insure line is not grounded.
No LEDS on. Check power (Pin 1) and ground (Pin 2) connection.
Master Tank level
display does not
change when actual
tank level is
changing.
Check transducer wiring. Ensure transducer signal voltage (Pin C)
is varying. If it does, check for same signal changes at Pin 6 of tank
level connector (if it is not the same repair wiring). If signal is good
at both locations try re-calibrating.
Remote Tank level
display does not
follow Master
display.
Perform self test. If self test is good, check pin 4 (data line) for
continuity and insure it is not shorted to ground or power. Insure
data line is not routed near noisy power or RF sources.
Unit fails self test,
LED 2 on.
Check pin 4 (data line) for continuity and insure it is not shorted to
ground or power.
No passwords are
accepted.
If the display issues the “wave off” after entering a password, insure
the unit is installed upright. During power-up the display should
cycle on each LED individually starting with the bottom LED.
Check that the left and right magnetic switches are recognized by
activating each switch and verifying that the associated LEDs
illuminate.