Tiffin Motorhomes 2014 Phaeton, Owner'S Manual

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TIFFIN MOTORHOMES –PHAETON® Chapter 7 ELECTRICAL FEATURES
If the unit is plugged into shore but no power to coach then make sure the shore outlet has power. If power is present
this may indicate the unit is sensing an open neutral condition. Start the generator. If power is restored to the coach
then neither the shore plug or outlet may be defective (the neutral line may be broken).
If there is no power to coach from shore or generator then check the generator circuit breaker. If the circuit breakers
are not tripped in generator or coach, replace transfer box.
For more detailed information on the automatic transfer switch, please refer to the specific owner’s instructions found
in the owner’s information package.
7-10
Caution
Service to this box is to be done by a qualified technician. DO NO attempt to
remove cover unless shore cord is unplugged and generator is off.
Automatic Transfer Switch
The automatic transfer box switches AC power from shore to generator to the coach main distribution panel. This is
achieved by the closing and opening of contactors that are located in the box interior (see diagram on Automatic
Transfer Switch which is located in owner’s information package). Power from shore is fed through contacts located on
R4 and R5. Power input is sensed by electrical board B1. If shoreline neutral is present it will allow relay R1 to energize
which energizes relays R2 and R3 applying shore power to the main control box located in the motor home. If the unit
senses that an open neutral condition exists, R1 will not energize not allowing the coach to receive the potentially
appliance damaging voltage. Power from the generator is sensed by boar d B1 and after a delay of 15-20 seconds, R4
and R5 energize automatically disconnecting shore power B1 checks for generator neutral and if present allow R2 and R3
to energize allowing generator power to the main control panel.