Generac Power Systems CorePower

DIAGNOSTIC
REPAIR
MANUAL
STANDBY GENERATORS
CorePower Home Standby Generator
MODELS:
6/7 kW
®

Generac Power Systems CorePower Specifications

General

Fuel Type	Gasoline
Rated AC Voltage	120 / 240 V
Frequency	60 Hz
Wheel Kit	Included
Engine Type	OHV
Outlet Types	(1) 120/240V L14-30R

Summary

PART 1 - GENERAL INFORMATION

Section 1.1 - Generator Basics

Covers fundamental generator principles, including parts and identification.

Section 1.2 - Measuring Electricity

Explains how to use meters to measure AC/DC voltage, frequency, current, and resistance.

Section 1.3 - Preparation Before Use

Details essential steps before generator operation, including fuel system configuration.

Section 1.4 - Operating Instructions

Provides guidance on using the control panel, automatic, and manual operation modes.

Section 1.5 - Automatic Operating Parameters

Defines parameters for automatic operation, including utility failure and cranking sequences.

Section 1.6 - General Maintenance

Outlines routine maintenance tasks for engine oil, air filter, spark plugs, and visual inspection.

Section 1.7 - General Troubleshooting

Covers general troubleshooting tips, recommended tools, and common issues.

PART 2 - AC GENERATORS

Section 2.1 - Description and Components

Details the AC alternator assembly, rotor, stator, and brush components.

Section 2.2 - Operational Analysis

Explains generator startup, on-speed operation, field excitation, and AC power output.

Section 2.3 - Troubleshooting Flowcharts

Provides step-by-step flowcharts for diagnosing common AC generator issues.

Section 2.4 - Diagnostic Tests

Details specific tests for diagnosing AC generator problems like voltage and frequency issues.

PART 3 - TRANSFER SWITCH

Section 3.1 - Description and Components

Describes the transfer switch, enclosure, EZ Transfer Operator, and fuse holder.

Section 3.2 - Operational Analysis

Explains the operational states: utility voltage present, transfer to standby, and transfer to utility.

Section 3.3 - Troubleshooting Flowcharts

Presents flowcharts for troubleshooting common transfer switch problems.

Section 3.4 - Diagnostic Tests

Details tests for diagnosing transfer switch issues, including voltage and wiring checks.

PART 4 - ENGINEDC CONTROL

Section 4.1 - Description and Components

Covers DC control system components: terminal strip, controller, switch, and fuse.

Section 4.2 - Engine Protective Devices

Details engine alarms like low oil pressure, high temperature, over speed, and low battery warnings.

Section 4.3 - Operational Analysis

Explains generator operation during utility source availability and failure.

Section 4.4 - Troubleshooting Flowcharts

Provides flowcharts for troubleshooting engine issues like not cranking or starting.

Section 4.5 - Diagnostic Tests

Details tests for diagnosing engine and DC control system faults.

PART 5 - DISASSEMBLY

Section 5.1 - Major Disassembly

Step-by-step instructions for disassembling the generator unit.

Section 5.2 - Exploded Views

Illustrates the generator components with part identification.

PART 6 - ELECTRICAL DATA

Wiring Diagram

Presents the overall wiring diagram for the generator system.

Electrical Schematic

Provides a detailed electrical schematic of the generator's circuitry.

Electrical Formulas

Lists common electrical formulas used for calculations and analysis.

APPENDIX A - SUPPLEMENTAL WORKSHEETS

APPENDIX B - INDEX OF FIGURES AND TABLES

Index of Figures

An alphabetical listing of all figures within the manual.

Index of Tables

An alphabetical listing of all tables within the manual.