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CHAPTER 8 - TROUBLESHOOTING GUIDE
Display trouble codes:
If a sender or its wiring is not operating properly, the following
codes are shown on the display:
1. If a sender is unresponsive or there is an open circuit in the
wiring so that the sender is not connected, the display will
indicate an open circuit by showing "OPn" on the LED display.
2. If a sender is shorted or there is a short in the wiring, the
display will indicate a short circuit by showing "Sht" on the
LED display.
3. If a sender is sending bad data, there is damaged wiring, or if
there is electrical interference, the display will indicate a data
error by showing "Err" on the LED display. Also, if the senders
have not been programmed correctly, they can interfere with
one another and result in "Err" on the LED display. Check all
the senders to make sure they are programmed correctly. If
they are, replace the sender that is creating the error.
4. If the display has been programmed for a single sender, and
double stacked senders have been connected, the display will
show "StA". In this case, change the senders or reprogram the
display as required. If only a top sender has been connected,
the display will show "nbo", indicating that no bottom sender
has been received. If the tank should only have a single
sender, correct the programming on the sender, it should not
be a top sender.
5. If the display has been programmed for double stacked senders
for tall tanks, and only the bottom sender is working and the
top one is not, then the display will show "ntP" indicating that
no top sender is being received. If the top is working but no
bottom sender is being received, then the display will show
"nbo". If neither sender is working, then the display will show
"OPn". Check the wiring and the programming of the senders.
If all is OK with that, replace the bad sender.
6. The display contains a permanent memory which is used to
store the programming for battery voltage calibration value
and the tank sender signal levels. These signal levels are used
to help the system adapt to the tanks, which increases sender
accuracy at low tank levels. If this memory should fail, "CAL"
will be flashed on the LED display, indicating a calibration
failure. It will be necessary to replace the display if this occurs.
Page 38
709-BTP3 Manual
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Table of Contents
Troubleshooting
