Airstream 2017 Interstate Owner's Manual page 48

Interior
Display Panel
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 first applied, the system will be in the
30-amp mode� The 30A LED will be ON when the
system is in the 30-amp mode� 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�
Press the "SELECT" button to switch to 20-amp service
if it is necessary to use a 20-amp adaptor or you know
the shoreline power is 20 amp, The 20A LED will light
up�
The generator supplies 20-amp service and is set
to switch the system automatically to the 20-amp
mode whenever the generator is the power source�
The "GEN" LED will illuminate when the generator is
supplying power, the 20A light will not�
The Display Panel is protected by a 5-amp automotive-
type fuse located under the EMS 120-volt Distribution
Panel cover� Remove four screws from the cover to
access the fuse�
Status
The water heater, roof A/C, coffee maker receptacle,
and microwave are set at the factory to be the
controlled circuits and are shed in this order�
This means if a power hungry electric grille is plugged
into an outlet and the system begins to use more than
30-amps it will begin to shed loads and will shut off the
water heater�
5-14
120-Volt Automatic Switch Over Box
The switch over box automatically switches the 120-
volt feed to the Energy Management System Module
from shoreline to generator and back as you choose
which way to power the touring coach� You simply
decide whether to plug into a 120-volt shoreline or
start the generator and the box will do the rest� If the
generator is accidentally started while plugged into
shoreline the box will sense the generator incoming
power, contact points inside the box will switch
cutting the shoreline connection, and establishing the
generator connection� This protects the system from a
possible overload from dual power sources�
Generator/City Power
A
a� To Energy Management System module main
breaker
b� From generator
c� From shoreline
1� When plugged into shoreline power, the current
path is from C to A�
2� When you start your generator, the points switch
and the power flow is from B to A. Stopping the
generator releases the points back to shoreline
feed�
3� If you're plugged into shoreline and you start the
generator, the points still switch since the generator
has the priority, so the current flow is still B to A.
NOTE
Make sure to read and understand all electrical
Component owner's manuals provided in the
owner's Packet before operating the touring coach.
Observe all operating instructions and Warnings as
well as all recommended maintenance schedules
and procedures.
B
C
2017 Interstate