Garnet SeeLevel I 705 Series Manual page 24

5. For the LPG tank, the open circuit code indicates an open circuit in the
wiring or a bad resistance sender in the LPG tank. If there is a short in
the wiring, the display will read zero all the time.
6. The display contains a permanent memory which is used to store the
programming for battery voltage calibration value, the number of senders
per tank, the LED brightness, the LPG 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, the memory error code will be flashed on the
display, indicating a calibration failure. It will be necessary to replace the
display if this occurs.
7. The diagnostics can be used to check the wiring and the senders:
a. If a short circuit is showing, disconnect the senders one at a time at
the sender location. If the short circuit indication goes away when a
sender is removed, then that sender is bad. If all the senders are
removed but a short circuit still shows, then the wiring may be shorted.
Disconnect the sender wire at the display, the short indication should
go away. If it doesn't, the display is bad.
b. If an open circuit for all the senders is showing, it is most likely a wiring
open circuit or display failure, since it is unlikely that all three senders
are bad. Try shorting the wiring together at the display, the display
should indicate a short circuit. If it doesn't, the display is bad. If it
does, then remove that connection and short the wires together at the
sender locations. If no short circuit is shown, then the wiring is open.
If the display does show a short circuit, then the senders must be bad.
c. If a single sender is showing an open, try shorting the wiring together
right at that sender. If a short now shows, the sender is bad or not
wired properly. If no short circuit shows on the display, the wiring to
that sender is open.
100% 15V
75%
14V
50% 13V
25% 12V
0% 11V
Memory Error