Airstream NTERSTATE - Manual (Page 78)

H
ELECTRICAL SYSTEMS
H - 3
CONVERTER COOLING SYSTEM
The 7300 electronic fan cooling system is the key to long life and trouble-free opera-
tion. 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 motorhome battery and to operate the 12-volt
systems, and appliances.
The converter is energized only when the motorhome is hooked up to 120-volt
city power.
Converter Testing
A. Confirm 120 volt power is going into converter.
B. Disconnect the 12+ wire from the master switch.
C. Using a voltmeter check voltage output between heavy positive and negative
wires coming out of converter.
D. The voltage must be within 13.8 and 14.0 volts. (The meter of the tester should be
calibrated periodically.)
E. If converter is not within these voltages, have it serviced by a qualified technician
or replace it.