Airstream INTERNATIONAL TRAILER Owner's Manual page 113

AIRSTREAM INTERNATIONAL TRAILER OWNERS MANUAL
The Display: The display receives the information from up to three sender panels via two wire cables. The
display is attached to a black plastic panel, with only one button on the front panel for all operations. When
the front panel button is pressed, the display powers up and sequentially displays the battery voltage, the 3
holding tank levels, and the LPG level (if the RV is equipped with an electrical sender). Each level is
shown for 2.5 seconds. The tank being displayed is indicated by one of four LED's (black water, grey
water, fresh water, and LPG) and the level is shown on a three digit LED display. After all levels are
shown, the display then automatically powers down, drawing virtually no power so that the RV battery is
not drained. By pressing the front panel button at the appropriate time during the cycle, different features
can be activated. These features are described in the next chapter.
A rocker switch on the front panel can control the fresh water pump, and an LED indicates when the pump
is on.
If a sender is operating properly and connected to the display with good wiring, then the display will show
the level normally. If the wiring is disconnected or cut, or if the sender panel is dead, then the display will
show "OPn" indicating an open circuit. If the wiring is shorted together, or if the signal conductor is
grounded out, then the display will show "Sht" indicating a short circuit. If the display receives corrupted
data, then it will show "Err" indicating that an error has occurred.
With these diagnostic features programmed into the display microprocessor, and the digital nature of the
tank level sensing technology, it is almost impossible for the system to indicate an incorrect water level,
and in the very unlikely event it does occur, the user can verify what is happening with the diagnostic
information.
OPERATING INSTRUCTIONS
The display is the only system component that is accessed by the user. All user input to the display is done
using the large green button labeled "PRESS" on the right hand side of the display.
Operation of the display is as follows:
To read all the tank levels:
1. Press the button and release it, the display will power up and show the following:
a. An LED next to "VOLTS" lights up and the battery voltage is shown for 2.5 seconds. For example,
"12.6" indicates that the battery is putting out 12.6 volts DC. The voltage is the only function that uses the
decimal point.
b. The black water (toilet sewage) tank is shown next. The LED next to "BLACK" will light up and the
black water level will be shown for 2.5 seconds, for example, "45" indicates that the black water tank is
45% full. The system auto calibrates itself so that regardless of the height of the tank, the percentage is
always correct.
c. The grey water (sink, lavy, and shower drain water) tank is shown next. The LED next to "GREY"
will light up and the grey water level will be shown for 2.5 seconds, for example, "79" indicates that the
grey water tank is 79% full.
G-25