Generac Power Systems IM Series - Manual (Page 3)

_________________TABLE OF
Page
Wiring Diagram eind Eiectricai Schematic...................... 11
Expioded View of Sheet Metai......................................... 26
Expioded View of Base and Puiiey..................................28
Exploded View of Generator and Panel.......................... 30
Electrical Formulas........................................................... 32
Specifications....................................................................33
Generator Fundamentals
Introduction........................................................................2
Electro-Magnetic Induction...............................................2
A Simple a-c Generator.................................................... 2
A More Sophisticated a-c Generator...............................2
Generator Block Diagram.................................................3
Introduction to Troubleshooting
Introduction.......................................................................4
Tools and Test Equipment............................................... 4
Rotor Rotational Speed....................................................4
Relationship of Voltage and Frequency......................... 5
Generator a-c Connection System.................................. 5
Effects of Engine Power...................................................5
Effects of Dirt and Moisture on RV Generators............. 5
Operational Analysis of D-C Controi System
Introduction.......................................................................6
Circuit Condition- Engine Shut Down.............................6
Circuit Condition- Engine Cranking................................ 6
Circuit Condition- Startup and Running......................... 7
Circuit Condition- Normal Shutdown..............................8
Insulation Resistance Tests
General...............................................................................9
The Hi-Pot Tester.............................................................. 9
Testing Stator Insulation.................................................. 9
Testing Rotor Insulation for Breakdown.........................10
Cleaning the Generator.................................................... 10
Drying the Generator........................................................ 10
CONTENTS
Page
Troubleshooting the RV Generator
Introduction....................................................................... 12
Problem No. 1- Engine Won’t Crank............................... 13
Problem No. 2- Engine Cranks, Won’t Start................... 15
Problem No. 3- Engine Cranks and Starts, Shuts
Down When Start/Stop Switch is Released....................17
Problem No. 4- Engine Starts Hard, Runs Rough.......... 18
Problem No. 5- Engine Won’t Shut Down.......................18
Problem No. 6- Loss of Generator a-c Output................19
Engine Troubieshooting
General...............................................................................23
Checking Engine Compression....................................... 23
Check Engine Ignition...................................................... 23
Check Carburetion............................................................ 23
Other Problems that Might Affect Engine Operation.. 23
Adjustments
General...............................................................................24
Engine Governor Adjustments........................................ 24
Voltage Regulator Adjustment.........................................24
Automatic Choke Adjustment.......................................... 25