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Page 1

SAFETY ..............................................................................2

Read This Manual Thoroughly

............................................. 2

Specifications

......................................................................4

Generator ............................................................... 4

Engine .................................................................... 4

Fuel Consumption

................................................... 5

Major Features

........................................................ 5

PART 1 – GENERAL INFORMATION ......................................9

Section 1.1 – Generator Basics ......................................... 10

Introduction

.......................................................... 10

Parts

.................................................................... 10

Generator Identification ......................................... 10

Section 1.2 – Measuring Electricity ...................................11

Meters

.................................................................. 11

The VOM

.............................................................. 11

Measuring AC Voltage ........................................... 11

Measuring DC Voltage ........................................... 11

Measuring AC Frequency ...................................... 11

Measuring Current ................................................ 12

Measuring Resistance ........................................... 12

Electrical Units ...................................................... 13

Ohm’s Law ........................................................... 13

Section 1.3 – Preparation Before Use ................................ 14

Introduction .......................................................... 14

Fuel Consumption ................................................. 14

Reconfigure the fuel system .................................. 14

Section 1.4 – Operating Instructions .................................16

Control Panel ........................................................ 16

User Interface ....................................................... 16

Automatic Operation ............................................. 16

Manual Operation.................................................. 16

Section 1.5 – Automatic Operating Parameters ..................18

Introduction .......................................................... 18

Utility Failure ......................................................... 18

Cranking ............................................................... 18

Cranking conditions .............................................. 18

Load Transfer Parameters ..................................... 18

Section 1.6 – General Maintenance ................................... 20

Introduction .......................................................... 20

Engine Oil ............................................................. 20

Engine Oil Recommendations ................................ 20

Air Filter ................................................................ 20

Spark Plugs .......................................................... 20

Visual Inspection .................................................. 20

Corrosion Protection ............................................. 20

Valve Clearance .................................................... 20

Battery ................................................................. 21

Section 1.7 – General Troubleshooting ..............................22

Introduction

.......................................................... 22

Recommended Tools

............................................ 22

Troubleshooting Reminders and Tips ..................... 22

Connectors ........................................................... 22

PART 2 – AC Generators

....................................................23

Section 2.1 – Description and Components

.......................24

Introduction .......................................................... 24

Engine-Generator Drive System ............................. 24

Alternator Assembly

............................................. 24

Brush Holder and Brushes

.................................... 24

Other AC Generator Components .......................... 25

Section 2.2 – Operational Analysis .................................... 26

Startup

................................................................. 26

On-Speed Operation

.............................................. 26

Field Excitation ...................................................... 26

AC Power Winding Output ..................................... 26

Section 2.3 – Troubleshooting Flowcharts .........................27

Introduction .......................................................... 27

Problem 1 – Generator Produces Zero Voltage

or Residual Voltage ............................................... 27

Problem 2 – Generator Produces

Low Voltage at No-Load ........................................ 28

Problem 3 – Generator Produces

High Voltage at No-Load ....................................... 29

Problem 4 - Voltage and Frequency

Drop Excessively When Loads Are Applied ............ 29

Section 2.4 – Diagnostic Tests .......................................... 30

Introduction .......................................................... 30

Safety ................................................................... 30

AC Troubleshooting............................................... 30

Test 1 – Check Main Circuit Breaker ...................... 30

Test 4 – Fixed Excitation /Rotor Amp Draw Test ..... 30

Test 6 – Resistance Check of Rotor Circuit ............ 32

Test 7 – Check Brushes and Slip Rings ................. 32

Test 9 – Test the Stator ......................................... 33

Test 10 – Test Rotor Assembly .............................. 34

Test 11 – Check AC Output Voltage ....................... 34

Test 12 – Check AC Output Frequency ................... 34

Test 13 – Adjust Engine Governor ......................... 35

Test 14 – Adjust Voltage Regulator ....................... 35

Test 15 – Check for Overload Condition ................. 36

Test 16 – Check Voltage and

Frequency Under Load ........................... 36

PART 3 – Transfer Switch ..................................................37

Section 3.1 – Description and Components .......................38

General ................................................................. 38

Enclosure ............................................................. 38

EZ Transfer Operator ............................................. 38

Fuse Holder .......................................................... 38

Brand	Generac Power Systems
Model	CorePower
Category	Portable Generator
Language	English

Generac Power Systems CorePower User Manual

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Generac Power Systems CorePower Specifications

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