Tiffin Motorhomes 2011 Phaeton, Owner'S Manual

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E L E C T R I C A L F E A T U R E S
7-10
For more detailed operating instructions and to determine necessary preventive-maintenance schedules and
procedures, review the manufacturer owner’s manual.
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.
Caution
Service to this box is to be done by a qualified technician. DO NOT attempt to remove
cover unless shore cord is unplugged and generator is off.
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.
Resettable Circuit Breakers
The resettable circuit breakers (Figure 7-16) are located within 18 inches of the
source of power; that is, the converter and the battery. When the circuit
breakers are shut down or electrically tripped, they must be manually reset. To
find the circuit breakers, follow the line from the battery or converter
approximately 18 inches—this may lead to a junction box or to a cabinet inside
the Phaeton or to a similar location.
Figure 7-16. Circuit Breakers