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ELECTRICAL SYSTEM
G - 4
A. Main charge line from tow vehicle
B. Trailer Batteries
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 shore-
line 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.
NOTICE: 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.
CONVERTER COOLING SYSTEM
The 7300 electronic fan cooling system is the key to long life and trouble-free operation.
The fan is never on more than required to cool electronic components in the converter.
You may never hear the fan operate.
Converter
The converter transforms 120-volt alternating current (AC) into 12-volt direct current
(DC). This provides power to charge the trailer battery and to operate the 12 volt interior
lighting, fans, and appliances.
The converter is energized only when the trailer is hooked up to 120-volt city power.