Garnet SeeLevel I 705 Series Manual page 23

3. If the display has been programmed for a single sender, and dual
stacked senders have been connected, the display will show the stack
error code. In this case, change the senders or reprogram the display as
required. If only a top sender has been connected, the display will show
the no bottom error code, indicating that no bottom sender has been
received. If the tank should only have 1 sender, correct the programming
on the sender, it should not be a top sender.
4. If the display has been programmed for dual stacked senders for tall
tanks, and only the bottom sender is working and the top one is not, then
the display will show the no top error code 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 the no bottom error code. If neither
sender is working, then the display will show the open circuit code.
Check the wiring and the programming of the senders. If all is OK with
that, replace the bad sender.
100%
75%
50%
25%
No Top Error
100% 15V
75% 14V
50% 13V
25% 12V
0% 11V
Stack Error
15V
14V
13V
12V
0% 11V
No Bottom Error
100%
75%
50%
25%
0%
No Bottom Error
100% 15V
75% 14V
50% 13V
25% 12V
0% 11V
15V
14V
13V
12V
11V
100% 15V
75% 14V
50% 13V
25% 12V
0% 11V
Open Circuit