Interior
2019 Interstate 5-11
Operation
In operation, when 120 VAC and 12 VDC are initially
applied, the system will energize the relays at one
second intervals, closing the normally open contacts
on each of the ve relays while monitoring the total
current� If the total should exceed the service limit, the
system will turn off the last load that was turned on� As
it does this, it calculates the amount of current that was
removed, which is the value for that load� This value
is placed in memory� The system has “learned” the
amount of current that particular appliance draws� This
feature compensates for the difference in current draw
over a range of line voltage and ambient temperature,
by relearning the load each time it is turned off�
The system now waits until the total current is lower
than the service limit, by the amount in memory, before
it will turn that load back on� This ensures that there is
sufcient current to operate the load.
Display Panel
The display panel requires little user interaction
and is provided to help the user understand power
management� The display monitors the total AC current
of the touring coach and prevents circuit breaker
tripping by momentarily shedding loads� As additional
appliances are turned on the system will begin to shed
loads� As appliances are turned off, and a minimum of
two minutes has expired, the system will automatically
restore power to each of the shed loads�
Service
The “Select” button allows the service type to be set
to either 30 amp or 20 amp, to match the incoming
service�
When power is rst applied, the system will be in the
30-amp mode and the screen will display “Service
30A”� Momentarily pressing the “SELECT” button will
switch the system to the 20-amp mode� Momentarily
pressing the button again will switch the system back
to the 30-amp mode�
Circuit Protection
Circuit protection for ALL 120 VAC loads are standard
residential resettable circuit breakers install in the
Power Center (120 VAC section)� Airstream has pre-
installed the correct breakers per RVIA (NEC) listing
requirements for the touring coach� The MAIN breaker
for the touring coach is 30 amp and feeds the branch-
breakers in the breaker box� Shutting off the MAIN
breaker will remove power to all branch loads, except
for receptacles on the Inverter circuit when the inverter
mode is “ENABLED”� The Inverter/converter contains a
resettable 20 amp input breaker and a 15 amp output
breaker� The remaining power center branch-breakers
feed individual loads and are dened by the label
afxed next to the breakers. The source for 120 VAC
power to the Power Center can come from either the
Shoreline plug when connected to a camp site or the
coach’s own generator when running� If both sources
are “ON” the power feed to the Power Center will be
coming from the generator�
The main and general load branch-breakers are
operated similar to a light switch with up as “ON” and
down as “OFF”� If an overload condition or a short
occurs the switch will snap to the “OFF” position�
The load for this breaker will now be “OFF”� Before
resetting the breaker be aware of any device that may
have been plugged in or turned “ON” which may have
cause the breaker to overload� Unplug or turn “OFF”
the possibly faulty device before resetting the breaker�
To reset the breaker, rmly push the breaker switch
to the “OFF” position then back to the “ON” position�
If the breaker snaps back to the “OFF” position while
resetting a fault condition still exists and should be
serviced by a qualied Service Technician. If the
breaker stays “ON” but snaps back to “OFF” after
plugging in or turning ON the possibly faulted device a
fault condition may exist in that device and should be
service by a qualied Technician.
The power center Ground Fault Interrupt Circuit (GFIC)
breaker is a special breaker that will provide additional
safety to the occupants of the touring coach on the
following receptacles; external, galley, lavatory, and
entertainment� In addition to short circuit and overload
protection the GFIC will shut off the breaker if any
current feeding out of the breaker does not return to
it� As in the case of a person contacting the electrical
energized part of the GFIC circuit and an electrically
conductive object not associated with the circuit�
Refer to to Ground Fault Circuit Interrupter and GFCI
Breaker Test in this section for more information�
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