AIRSTREAM INTERNATIONAL TRAILER OWNERS MANUAL
G-4
12V POWER CIRCUITS
The current in the converter system is 12 volts direct current (12VDC) negative grounded.
Power sources that supply 12VDC current to the system are as follows:
A.
Main charge line from tow vehicle
B.
Trailer Battery
C.
Converter
The power sources above are all electrically connected to the 12-volt distribution fuse panel that distributes
current to interior branch circuits. The circuits provide power to operate all 12-volt DC lights, pumps,
motors and appliances.
The 7300 series power converter is a solid-state electronic power supply and is maintenance free. It is so
self-sufficient and quiet that you will probably not know it is working except for the fact that your batteries
are always charged, and your 12-volt lights and appliances always work. If any 12-volt appliance fails to
operate, first check your recreational vehicles 12-volt distribution fuse block located behind the decorative
front door in the front right hand corner of the converter and inspect all fuses. If a fuse is opened or blown
replace it with the same size fuse (never install a larger use). If the fuse opens again, have an electrician or
certified RV technician locate the circuit trouble. Replace blown fuses with Littefuse type 257 fuses only.
If the 7300 series power converter is not working, first confirm the RV supply or shoreline cord is plugged
into a live circuit. Then check all the 120-volt breakers in your RV distribution panel to make sure they are
on. If the breaker is tripped, follow the instructions to reset the breakers. If the breaker trips again, consult
an electrician or certified RV technician.
CONVERTER OPERATION
The MagneTec 7300 series electronic power converter is designed to supply the nominal 12-volt filtered
D.C. power for all 12 volt operated devices encountered in RV service. Although the converter is an
excellent battery charger, the converter does not require a battery to be connected to it for proper operation.
CAUTION
: When installing a battery (s) always observe polarity. Connecting a battery reverse
polarity will blow the power converter main fuses located on the 12 volt D.C. distribution fuse block.
120 VOLT AC PANEL BOARD
The AC panel board section of the series 7300 is located behind the decorative door in the upper left-hand
corner. This panel 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 located in the lower half of the 7300. 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” my putting their breaker handle up to the on position or “off” by
flipping the handle down to the off position. To reset the tripped breaker move handle to off then on.
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