Airstream Nest 2020, Owner'S Manual

Page: 37 / 82

Interior
2020 Nest
5-9
120-Volt AC Panel Board
The AC panel board section contains the 120 VAC
branch circuit breakers for your RV. One of the
breakers controls the 120-volt power to the 12-volt
converter section. This breaker may also control
another branch circuit. Check the label next to each
breaker for what each branch circuit breaker controls.
The 120-volt circuits may be turned on by setting their
breaker handle up, to the ON position, or off by setting
the handle down, to the OFF position. To reset the
tripped breaker, move handle to OFF then ON.
The system incorporates GFCI breakers that
implement an auto self-test functionality. When turned
off, these breakers require external AC power to be
present before they can be turned back on. If AC power
is present from and the breaker refuses to stay on
consult an electrician or certified RV technician.
Fuses and Breakers
Breakers
The distribution panel was designed to use a 30 AMP
120Volt main breaker with branch circuits. Double
breakers may be used for the branch circuits. Should
a breaker become faulty replace with the same type
breaker only. Use only approved circuit breakers and
12V fuses.
NOTE
When replacing circuit breakers replace with the
same type and rating as the original.
12 VDC Fuses
Each 12 VDC circuit in the distribution panel was
designed for a maximum of a 20 amp automotive
style fuse. Should one need to be replaced, be sure
to replace it with the same type and Amp rating as
originally supplied by Airstream. Replacing it with either
a higher or lower Amp fuse could result in the panel not
functioning properly.
REVERSE Polarity Fuses
The power converter is equipped with reverse polarity
fuses, Should these fuses “blow” either during the
manufacturing process or while connecting the battery,
replace with the same type and rating fuse as originally
provided with the equipment.
The power converter is not weather resistant nor
designed for installation in wet locations. The power
converter must be protected from direct contact with
water.
Automatic Micro-Controller Operation
The power converters 3-stage switch mode is fully
automatic. The converter senses which mode it needs
to be in by checking the condition of the battery. The
three modes include:
Absorption Mode: During this mode the converter
output is in the 13.6 VDC range. This is the mode
that the converter will function at normally. This mode
provides the 12 VDC and the current required by the
trailer.
Bulk Mode: In this mode, the output voltage of the
converter will switch to 14.4 VDC range for a maximum
of four hours. If the converter cycles between
“Absorption and Bulk modes”, there could be a shorted
battery cell or other issues.
Float Mode: If the trailer has not been used for a
period of time and the shore power has been left
plugged in, the converter will automatically go into
float mode with a voltage of 13.2. When the converter
senses a demand, by turning on lights, the converter
automatically returns to absorption mode.
120-Volt Electrical System
City Power
When your trailer is hooked up to external AC power,
the converter system automatically charges the trailer
batteries with the battery disconnect switch in the USE
(on) position and, if the 7-way cord is hooked up and
depending on your vehicle, your tow vehicle battery
as well. The speed and degree of charge depends on
how much power is used for lights and appliances, as
only the surplus goes to charging the battery. If you are
making an extended stay, then you should keep your
trailer hooked up to a 120-volt current if it is available.
While you are connected to external AC power, the
wiring is protected by circuit breakers in the breaker
panel. The circuit breaker panel for the 120-volt system
is located in the converter. In the event of a failure of a
120-volt circuit, first check your trailer circuit breakers
and the breaker for the outlet into which your trailer
shoreline cord is plugged. If a breaker continues to
trip after you have reset it several times, your circuit
may be overloaded with appliances or there may be a
short in the circuit. Try lessening the load on the circuit.
Perhaps an electric griddle, hair dryer, or an electric
heater can be turned off. If that does not solve the
problem, consult an Airstream Service Center.
The 120-volt electrical system provides power to
operate the air conditioner, converter, and 120-volt
receptacles for portable appliances. The power is