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Operation
The refrigerator requires 12-volt current to operate,
even if running on LP or 120-volt modes� The 12-volt
is used to power the circuit board that directs the
refrigerator functions� When running in a mode such
as LP, it means the heat source, by far the largest
power requirement to evaporate the ammonia, is being
provided by an LPG burner�
NOTE
When unit is plugged into 120 power and the
switch is in auto mode, 120 power is the priority
source of operation.
Solar System
Airstream utilizes Zamp solar panels and a Victron Blue
Energy charge control and display� Cut the cord to
expensive daily shore power hook-ups with the 12-volt
solar charging system� Ensuring the panels are clean,
not partially shaded by trees or other interference
will promote solar charging� Manuals on their use are
included with the Airstream owner's packet�
The Victron charge control performs these basic
functions:
1� It senses when the battery is fully charged and
disconnects the charge current to avoid over-
charging the battery�
2� It resumes charging the battery when the battery
voltage has dropped sufficiently to accept
additional charge current�
3� It checks the availability of charge current, by
cycling the relay every 4 minutes� If there is
insufficient charge current available, it's internal
relay will disconnect the battery to prevent
discharge through the solar panels at night�
A single port has also been pre-wired in the front of the
unit near the battery box� This port is a quick plug-in for
a portable solar charging kit� These ports are designed
for solar panels added after manufacturing�
Refer to Section 8 - Maintenance for Solar Panel
Wiring diagram and information�
2021 Classic
SeeLevel II Monitor Panel
The display is the only system component that is
accessed by the user� The display shown above is
located inside the galley cabinet� All user input to the
display is done using the five buttons along the bottom
of the display� This information is available on the main
CZone® touch screen and communicates through the
Airstream Smart RV Control app�
NOTE
The following information is for use of the SeeLevel
II Monitor Panel. The Multiplex Systems main
control panel can also be used.
The display receives the information from the three
sender pads via a single, two-conductor wire, and
displays the level information in percent of full on a
three-digit, LED display� When the front panel button
for a particular tank is pressed, the display powers
up and displays the level for that tank� If the button is
pressed and released, the display will show the level
for about 5 seconds and then shut down automatically�
If another button is pressed before the display shuts
down, then the new level will immediately be shown� If
the same button is pressed twice, the display will hold
on that tank and continue to show updated levels for
5 minutes before shutting off� This allows the user to
monitor the filling or draining of the tank. By pressing
two buttons at once, the diagnostic functions can be
accessed�
Sender pads are installed and stuck to the sides of the
holding tank� The sender scans the water level through
the tank wall using digital techniques programmed into
the sender microprocessor�
Interior
5-21
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