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Converter
The power converter is located in the galley below
the pantry and is accessed by opening the decorative
door�
The converter transforms 120-volt AC into 12-volt
DC� The converter/charging system is the interior low
voltage electrical system that enables you to use the
interior lights, fans, pumps, and 12-volt appliances,
whether operating on self-contained battery power or
120-volt city power� The 12-volt light bulbs give off the
same light as regular household bulbs, so that when
operating on self-contained battery power, everything
works normally except the 120-volt convenience
outlets and 120-volt appliances� The converter system
is designed to maintain constant output voltages
regardless of the variances that occur in city power
systems�
The converter is energized only when the trailer is
hooked up to external AC power�
To test the converter, observe the following:
• Confirm 120-volt power is going into converter.
• Disconnect the 12+ wire from the master switch�
• Using a voltmeter, check voltage output between
heavy gauge positive and negative wires coming out
of converter�
• The voltage should be within 13�8 and 14�0 volts�
(The meter of the tester should be calibrated
periodically�)
• If converter is not within these voltages, have it
serviced by a qualified technician or replace it.
One of these wires is not spliced onto a wire of the
same color� It is the backup wire that is yellow in the
cable and black in the harness�
A label on the inside of the converter door lists the
circuits and what each fuse powers�
2017 Tommy Bahama TT
12-Volt Power Circuits
The current in the converter system is 12 volts direct
current (12 VDC) negative grounded� Power sources
that supply 12 VDC current to the system are as
follows:
• Main charge line from tow vehicle
• Trailer batteries
• Converter
The power sources listed 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 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 12-volt distribution fuse block, located behind the
decorative front door, and inspect all fuses� If a fuse
is opened or blown, replace it with the same size fuse
(never install a larger fuse)� If the fuse opens again,
have an electrician or certified RV technician locate
the circuit trouble� Replace blown fuses only with the
same type and amperage size previously used�
If the power converter is not working, first confirm the
RV supply or shoreline cord is plugged in to 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 power converter is designed to supply the nominal
12-volt-filtered DC 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�
NOTE
When installing a battery(ies), always observe
polarity. Connecting a battery in reverse polarity
will blow the power converter main fuses located
on the 12-volt DC distribution fuse block.
Interior
5-9
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