Section 2 – Operation
Recreational Vehicle Generator
2.8.2 HIGH TEMPERATURE SWITCH
This switch (Figure 2.2), which has normally open (N.O.) contacts, is mounted near the oil filter. The contacts close if the temperature should exceed approximately 284º F (140º C), initiating an engine shutdown.
Figure 2.2 – Low Oil Pressure and
High Temperature Switches
High Temperature Switch
Low Oil Pressure
Switch
2.8.3 FIELD BOOST
The Controller Circuit Board houses a field boost diode and resistor that are not part of the automatic choke circuit. These two components are part of a “field boost” circuit (Figure 2.3). During engine cranking only, a positive DC (battery) voltage is delivered through the diode, resistor, brushes and slip rings, to the generator rotor. Application of this voltage to the rotor “flashes the field” whenever it is started. Flashing of the field each time the generator starts makes sure that a sufficiently strong magnetic field is available to produce “pickup” voltage in the stator windings.
Figure 2.3 – Field Boost Circuit
2.8.4 OVERVOLTAGE PROTECTION
A
Figure 2.4 – Solid State Voltage Regulator
The voltage regulator also incorporates a “voltage surge protection circuit.” This circuit prevents trou- blesome surges in the generator AC output voltage. Voltage surge is a common cause of damage to elec- tronic equipment.
2.9ADDITIONAL INFORMATION
2.9.1 25-HOUR BREAK-IN PERIOD
The first 25 hours of operation is the
•Run the unit at varying electrical loads to help seat the engine piston rings properly.
•Check the engine oil level frequently. Add oil if needed. It is normal for the generator engine to consume more oil than is normal until the piston rings have properly seated.
•For the
•After operating the unit for 25 hours, complete the tasks recommended under
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