Garnet SeeLevel I 705 Series Manual page 25

To review the sender diagnostics:
1. The sender diagnostics can be reviewed periodically to check for any
degradation of the tank senders. If a sender appears to be
malfunctioning, reviewing the diagnostics should be the first step in the
troubleshooting process. Note that there are no diagnostics for the
battery voltage or LPG.
2. The diagnostic for the senders is the signal power. This is an indication
of how much signal is being transmitted through the tank wall and picked
up by the receive part of the sender. If the signal power is too low, it can
indicate a sender which is detached from the tank, excessive buildup on
the inside of the tank, bad wiring to the sender, low battery voltage, or a
defective sender.
3. To check the signal power, press and hold the button for the tank to be
checked, the display will show the level for that tank. While continuing to
hold down the button for the tank, press the BATT button. The display
will show the diagnostics code, when that happens, release the buttons,
the display will then change to showing the signal power diagnostic. The
diagnostics code exists to verify to the user that the diagnostics mode
has been entered, since a tank level has the same appearance as a
signal power level.
4. The signal power should show at least two green LEDs to be at a
comfortable level. The system will work with only one green LED
showing, but there will be very little margin if the signal level were to
drop. One green LED is not considered adequate power upon
installation since it does not allow for any degradation.
100% 15V
75% 14V
50% 13V
25% 12V
0% 11V
Diagnostics