Class1 118253 - ITL40 108404-XX - Full - Manual (Page 22)

FORM-ENG-0018 REV A 05-27-03
PAGE 21 of 25 S U I T A B L E F O R E X T E R N A L D I S T R I B U T I O N
OPERATION MANUAL
DATE 9/24/2008
PRODUCT GROUP ITL40 P/N 118404-XX REV 1.00
607 NW 27th Ave
Ocala, FL 34475
Ph: 352-629-5020 or 1-800-533-3569
Fax : 352-629-2902 or 1-800-520-3473 PRODUCT Intelli-Tank Level 40 BY AMS
MANUAL P/N:118253 P RINTED : 1/8/09
7. Troubleshooting
7.1. Evaluation table
Condition Visual Evaluate
Bottom two LEDs rows
alternate flashing.
Signal voltage too low
(less than 0.4 V).
Check sensor wiring. Ensure +5V at pin A, ground at pin B and at least 0.4V at
pin C (Signal).
Use password LLRR LLRR to view sensor voltage on display.
Top two LED rows
alternate flashing.
Signal voltage too high
(greater than 4.8V).
Check sensor wiring. Ensure +5V at pin A, ground at pin B and no more than 4.8V
at pin C (Signal).
Use password LLRR LLRR to view sensor voltage on display.
Middle two LED rows
alternate flashing.
Memory error.
Perform self test RLLR LLRR. If it shows “MEM-FAIL” replace display, otherwise
recalibrate or reset as REMOTE.
Outer two LED rows
alternate flashing.
Invalid calibration.
Try to recalibrate. If condition remains, check if the sensor signal voltage (pin C)
changes as tank level increases. If it doesn’t, replace sensor. If it does, verify
depth of tank. It may be impossible to calibrate a tank with a depth of less than 6
inches.
Bottom four and Upper
four LEDs rows alternate
flashing.
Not receiving data.
The display is configured as a REMOTE. Recalibrate if a MASTER is required. If
the display is supposed to be a REMOTE check communication data lines for
continuity.
No LEDS on. Check power (Pin 1) and ground (Pin 12) connection.
Master Tank level unit
does not change when
actual tank level is
changing.
No picture
Check sensor wiring. Ensure sensor 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 unit
does not follow Master
display.
No picture
Perform self test. If self test is good, verify communication data lines for
continuity. Insure 1-wire data line is not routed near noisy power or RF sources.