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Interior
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 first 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�
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 screen will display
"Service 20A"�
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
screen will display "Generator 20A" when the generator
is supplying power�
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 roof A/C and microwave are set at the factory to be
the controlled circuits and are shed in this order�
This means if a power hungry appliance 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�
5-12
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
2019 Tommy Bahama TC
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