User Guide

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FROM SHORE LINE
To operate appliances from shore line power, plug in the shore line cable to
the supply pedestal at the campground or dock. The ATS automatically
connects all AC load panel appliances to shore line power.
FROM INVERTER OR GENERATOR
To operate appliances from the alternate 120/240VAC power source,
energize (power on) the alternate power source connected to the ATS 503
“GEN” input terminals.
When using the ATS 503 with a listed RV generator, a time delay is usually
needed. With time delay enabled, a 20-25 second time delay is imposed to
let the generator power stabilize before the ATS will transfer power from the
alternate source to the ATS 503 load output terminals.
SET TIMER JUMPER
A
shorting jumper at J5 or “Set Timer” (see wiring label) provides the
capability to disable the time delay in the ATS 503 for use with alternate
supply sources (such as an inverter) that do not need a time delay period.
The default position for the shorting jumper is installed across “Timer On”.
LED “TMR ON” will illuminate when the shorting jumper is bridging the pins
at “Timer On”. LED “TMR ON” will not illuminate when the shorting jumpe
r
is bridging the pins at “TIMER OFF”.
Please note: If the shorting jumper is lost, the time delay will default to “TMR
ON” and provide the time delay function, however the “TMR ON” LED will
not illuminate.
FAULT LOCKOUT INDICATOR (“Generator” source side)
A fault lockout indicator LED (see wiring label for location) is provided to
indicate that a fault has occurred in the system such as a relay failure.
If the ATS 503 is in generator mode when a fault occurs, all relays are
forced back to shore line connections and the fault indicator LED
illuminates. If a fault is detected prior to switching the fault indicator will
turn on and the unit will not switch. In the event that the fault lockou
t
indicator comes on do the following: Turn off the generator or alternate
power source for a minimum of 1 minute. After one minute turn on the
generator/alternate power source. If the fault lockout indicator comes
back on, repeat the above steps. If the fault lockout indicator comes on
three or more times consecutively contact a reputable RV service
center.
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