Troubleshooting GP Repairwc_tx000548gb.fm 726. Troubleshooting6.1 Troubleshooting MethodologySee Graphic: wc_gr003415If a generator problem is not an obvious engine or wire fault, the causeof the problem will be associated with one of two things: amalfunctioning generator or faults in the circuit supplying voltage to thereceptacles. By starting the troubleshooting procedures at thegenerator output terminal strip (z) you can determine whether theproblem lies within the generator or the circuit supplying thereceptacles.For troubleshooting a no-voltage condition, you’ll need to rule outproblems with the stator windings (1) and the rotor windings (13). Fora low-voltage condition (any voltage less than 120V), you’ll need torule out problems with the stator and rotor windings, a malfunctioningvoltage regulator (16), and problems with the brushes (13) and/or theexcitation winding (15). For a high-voltage condition, you’ll need to ruleout a malfunctioning voltage regulator and/or problems with thevoltage regulator’s sensing wires (y).For troubleshooting the receptacle circuits, you’ll need to rule outproblems with the main circuit breaker (3), the individual circuitbreakers (5, 6, and 7), and the wiring that connects all thecomponents.For troubleshooting a malfunctioning auto idle circuit, you’ll need torule out a blown fuse (9) and problems with the idle solenoid, the DCwinding (15), the rectifier (12), the auto idle switch (8), the auto idle unit(2), and the wiring that connects all the components.For troubleshooting a malfunctioning anti-afterfire circuit, you’ll need torule out a faulty DC winding (15), a blown fuse (9), a faulty engine ON/OFF switch (11), or a faulty capacitor (10).Detailed procedures for making the tests are included in the upcomingsections of this manual.
