Sign In
Upload
Download
Table of Contents
Contents
Add to my manuals
Delete from my manuals
Share
URL of this page:
HTML Link:
Bookmark this page
Add
Manual will be automatically added to "My Manuals"
Print this page
×
Bookmark added
×
Added to my manuals
Manuals
Brands
Generac Power Systems Manuals
Portable Generator
8 kW LP
Diagnostic repair manual
Generac Power Systems 8kW Diagnostic Repair Manual
Home standby generators
Hide thumbs
Also See for 8kW
:
User manual
,
Owner's manual
(121 pages)
,
Repair manual
(210 pages)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
Table Of Contents
231
page
of
231
Go
/
231
Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Generator Specifications
Stator Winding Resistance Values
Air-Cooler V-Twin Engine Specifications
Liquid-Cooled 1.2 Liter Engine Specifications
The 8 KW, Air-Cooled Prepackaged Generator
Typical Prepackaged Generator with 1.2 Liter Engine
General Information
Table of Contents
Generator Identification
Units with Air-Cooled V-Twin Engine
Units with Liquid Cooled Engine
Voltage Codes
Generator Identification Code
Typical Data Plate
Typical Data Card
AC Connection Systems
Dual Stator Power Windings
Prepackaged Installation Basics
Selecting a Location
Mounting the Generator
Grounding the Generator
Lp/Natural Gas System (Air-Cooled Units)
LP Gas System
Natural Gas System-Liquid Cooled Units
The Transfer Switch
Power Source and Load Lines
System Control Interconnections
Installation with a GTS Transfer Switch
Preparation before Use
Fuel Requirements
Engine Oil Recommendations
Recommended Engine Coolant
Engine Governor Oiling
Visual Inspection
Measuring Voltages
Measuring Current
Measuring Resistance
Stator Insulation Tests-Air Cooled Units
Stator Insulation Tests - Liquid Cooled Units with 1-Phase Stator
Stator Insulation Tests - Liquid Cooled Units with 3-Phase Stator
Testing Rotor Insulation
Cleaning the Generator
Drying the Generator
Engine - Generator Protective Devices
Units with Air-Cooled Engine
Protective Devices on Liquid Cooled Engine
Operating Instructions
Control Panel - Units with Air-Cooled Engine
Control Panel - Units with Liquid Cooled Engine
To Select Automatic Operation
Manual Transfer to "Standby" and Manual Startup
Manual Shutdown and Retransfer Back to "Utility"
The Set Exercise Time Switch
Automatic Operating Parameters
Automatic Operating Sequences
Automatic Operating Sequences Chart
Prepackaged Air-Cooled AC Generators
Other AC Generator Components
Field Boost Circuit
Operational Analysis
Rotor Residual Magnetism
Field Boost
Operation
Troubleshooting Flow Charts
Generator Produces Zero or Residual Voltage
Generator Produces Low Voltage at No-Load
Generator Produces High Voltage at No-Load
Voltage and Frequency Drop Excessively When Loads and Applied
Description and Components
Engine-Generator Drive System
The AC Generator
Lower Bearing Carrier
Rotor Assembly
Stator Assembly
Upper Bearing Carrier
Brush Holder and Brushes
Diagnostic Tests
Safety
Check Main Circuit Breaker
Check AC Output Voltage
Test Excitation Circuit Breaker
Test Stator DPE Winding
Check Brushes and Slip Rings
Test Rotor Assembly
Check Field Boost
Check Voltage Regulator
Check AC Output Frequency
Check and Adjust Engine Governor
Check and Adjust Voltage Regulator
Check Voltage and Frequency under Load
Check for Overload Condition
Prepackaged Liquid-Cooled AC Generators
Description and Major Components
Blower Housing
Fan and Ring Gear Assembly
Rear Bearing Carrier
Exploded View of AC Generator Components
The Excitation Circuit
AC Meters
Schematic Diagram of AC Generator
Block Diagram of AC Generator
Check Voltage-Phase Selector Switch Position
Check AC Voltmeter
Test Thermal Protector
Test Voltage Regulator
Check Leads 1 and 4
Test Rotor Windings
Test Voltage-Phase Selector Switch
"V-Type" Prepackaged Transfer Switches
Transfer Switch Major Components
Exploded View of V-Type Prepackaged Transfer Switch
Enclosure
Transfer Mechanism
Transfer Relay
Neutral Lug
Manual Transfer Handle
Terminal Block
Fuse Holder
Utility Source Voltage Available
Utility Source Voltage Dropout
Transfer to Standby
Retransfer Back to Utility
In Automatic Mode, no Transfer to Standby
In Automatic Mode, no Retransfer Back to Utility
In Automatic Mode, Generator Starts and Transfer to Standby Occurs When Utility Source Voltage Is Available
Check Voltage at Terminal Lugs E1, E2
Check Voltage at Standby Closing Coil C2
Test Transfer Relay TR
Check Manual Transfer Switch Operation
Test Limit Switch XB1
Check Voltage at Terminal Lugs N1, N2
Check Voltage at Utility 1 and Utility 2 Terminals
Check Voltage at Utility Closing Coil C1
Check Fuses F1 and F2
Test Limit Switch XA1
"Y-Type" Prepackaged Transfer Switches
Prepackaged Terminal Strip
3-Phase Power Monitor
Switch Enclosure
Utility Voltage Available (2-Pole Units)
Utility Voltage Available (3-Pole Units)
Utility Voltage Dropout (2-Pole Units)
Utility Power Outage (3-Pole Units)
Initial Transfer to Standby (2-Pole Units)
Initial Transfer to Standby (3-Pole Units)
Final Transfer to Standby (2-Pole Units)
Final Transfer to Standby (3-Pole Units)
Retransfer to Utility (2-Pole Units)
Retransfer to Utility (3-Pole Units)
In Automatic Mode, will Not Transfer to "Standby"
In Automatic Mode, will Not Retransfer to "Utility"
Genset Starts and Transfer Occurs When Utility Power Is Available (3-Phase Transfer Switches)
Test Automatic Operation
Check Voltage at Terminals E1/E2/E3
Check Voltage at Terminals B1/B2
Check Wiring
Test Limit Switch LS3
Test Limit Switch LS1
Test Limit Switch LS2
Test Bridge Rectifier
Test Solenoid Coil
Check Manual Operation
Inspect Main Contacts
Check Voltage at Terminals N1/N2/N3
Check Voltage at Terminals A1/A2
Check Voltage at Terminals N1A/N2 of Customer Terminal Strip
Test 3-Phase Power Monitor
Transfer Mechanism Removal
Electrical Section Disassembly
Stationary Main Contacts Removal
Moveable Main Contacts
Testing and Inspection
Reassembly
DC Control (Units with Air Cooled Engine)
Auto-Off-Manual Switch
15 Amp Fuse
Initial Dropout of Utility Source Voltage
Utility Voltage Dropout and Engine Cranking
Engine Startup and Running
Initial Transfer to the "Standby" Source
Utility Voltage Restored and Retransfer to "Utility"
Engine Shutdown
Engine will Not Crank When Utility Power Source Fails
Engine will Not Crank When Auto-Off-Manual Switch Is Set to "Manual"
Engine Cranks and Starts but no Transfer to Standby
No Automatic Retransfer Back to Utility
Unit Starts & Transfer Occurs When Utility Power Is Available
Generator Does Not Start and Exercise as Programmed
Check Position of Auto-Off-Manual Switch
Try a Manual Start
Test Auto-Off-Manual Switch
Check Wires 15A
Check 15 Amp Fuse
Check Battery
Check Wires 15/15A Voltage
Check Wire 56 Voltage
Test Starter Contactor
Test Starter Motor
Check Fuel Supply and Pressure
Check CMA Circuit Board Power Supply and Output to Wire 56
Check CMA Board Wire 14 Output
Check Fuel Solenoid
Check for Ignition Spark
Check Spark Plugs
Check Engine Compression
Check Engine I.S.D. Module
Check and Adjust Ignition Modules
Check Oil Pressure Switch
Check High Oil Temperature Switch
Check Wire 18
Check Generator Main Circuit Breakers
Test Stator Battery Charge Winding Output
Ground CMA Terminal 23
Test Terminals 23 and 194 Circuit
Test Sensing Transformer
Disconnect Wire 23 from CMA Terminal Strip
Check Utility Sensing Voltage at CMA Circuit Board
Check Transfer Switch Fuses F3 and F4
Check Voltage at CMA Utility 1 and 2 Terminals
Check Voltage at Transfer Switch Load 1 and Load 2 Terminals
Reset Exercise Timer
DC Control Liquid Cooled Engine Units
Control Module Assembly
Control Console Components
Engine Mounted Components
Transfer Switch
DC Control System Schematic
Circuit Condition-Utility Source Voltage Available
Circuit Condition - Initial Utility Voltage Dropout
Circuit Condition - Cranking and Initial Startup
Circuit Condition - Initial Transfer to Standby
Circuit Condition - Utility Voltage Restored
Circuit Condition - Initial Retransfer Back to Utility
Circuit Condition - Final Retransfer to Utility
Circuit Condition - Generator Shutdown
Check Auto-Off-Manual Switch Position
Try to Start Engine Manually
Inspect Auto-Off-Manual Switch to CMA Circuit Board Wiring
Check 30 Amp Fuse F1
Test Control Contactor CC
Test Starter Motor SM
Check CMA Circuit Board Power and Wire 56 Output
Check for Mechanical Damage
Check Fuel Supply
Check Wire 14 Output to Ignition
Test Ignition Coil
Test Ignition Condensor
Inspect Distributor Cap and Rotor Head
Inspect Contact Points
Check Governor Advance
Check Ignition Wires
Check Ignition Timing
Check DC Volts at Terminal 14 of TB1
Test Fuel Solenoid FS
Check Engine Compression and Condition
Check Generator Main Line Circuit Breaker
Check Sensing to CMA Circuit Board
Check Voltage at Terminal Lugs E1, E2, E3
Check Voltage at Terminal Lugs N1, N2, N3
Check Voltage at CMA Terminals N1A and N2
Operational Tests and Adjustments
Manual Transfer Switch Operation
System Voltage Tests
Generator Tests under Load
Testing Automatic Operation
The 7-Dat Exercise Cycle
Adjusting the Engine Governor
Voltage Regulator Checks and Adjustments
Load Block Adjustments
Adjusting Drive Belt Tension
Setting Weel;Y Exercise Cycle
Engine Governor Adjustment
Voltage Regulator Adjustment
Adjustment of 3-Phase Power Monitor
Electrical Data
Schematic Diagram
Wiring Diagram
Advertisement
Quick Links
1
Generator Specifications
Download this manual
See also:
Repair Manual
,
Owner's Manual
Table of
Contents
Previous
Page
Next
Page
1
2
3
4
5
Advertisement
Table of Contents
Need help?
Do you have a question about the 8kW and is the answer not in the manual?
Ask a question
Questions and answers
Related Manuals for Generac Power Systems 8kW
Inverter Generac Power Systems 7 kW NG Repair Manual
Standby generator air-cooled product with nexus control, 7 kw ng, 8 kw lp, 9 kw ng, 10 kw lp, 13 kw ng, 14 kw lp, 15 kw ng, 15 kw lp, 16 kw ng, 17 kw lp, 18 kw ng, 20 kw lp (210 pages)
Inverter Generac Power Systems 10 kW LP Repair Manual
Automatic standby generators (192 pages)
Portable Generator Generac Power Systems 8 kW Owner's Manual
8, 10, 14, 17 & 20kw air-cooled, automatic standby generators (121 pages)
Air Conditioner Generac Power Systems 8 kW Owner's Manual
Air cooled (112 pages)
Inverter Generac Power Systems 8kW Owner's Manual
Automatic standby generator 8kw to 20kw (108 pages)
Portable Generator Generac Power Systems 7 kW NG Installation Manuallines
Air-cooled generators (68 pages)
Portable Generator Generac Power Systems 7 kW NG Installation Manuallines
Air-cooled generators. single-cylinder gh-410 engine; v-twin gt-530 engine; v-twin gt-990 engine; v-twin gt-999 engine (60 pages)
Portable Generator Generac Power Systems 8 - 20kW Air-cooled Automatic Standby Generators Owner's Manual
8 - 20kw air-cooled, automatic standby generators (45 pages)
Portable Generator Generac Power Systems Automatic Standby Generators Owner's Manual
8, 10, 12, 14, 16, 17 & 20kw air-cooled, automatic standby generators (40 pages)
Inverter Generac Power Systems Automatic Standby Generator Owner's Manual
8 kw to 22 kw automatic standby generator (40 pages)
Inverter Generac Power Systems 8KW Owner's Manual
8, 10, 12, 14, 16, 17 & 20kw air-cooled automatic standby generators (40 pages)
Portable Generator Generac Power Systems Automatic Standby Generator Owner's Manual
8kw to 20kw automatic standby generator (36 pages)
Generac 8kW, 11kW, 13kW, 14kW, 15kW, 16kW, 17kW, 20kW Manual
(article)
Inverter Generac Power Systems 7kW Installation And Owner's Manual
Air-cooled, automatic standby generators (68 pages)
Inverter Generac Power Systems 20kW Owner's Manual
1.5l 20kw standby generator (52 pages)
Portable Generator Generac Power Systems 9 kW Owner's Manual
60 hz air-cooled generators 9kw to 22kw (40 pages)
Related Products for Generac Power Systems 8kW
Generac Power Systems 86640
Generac Power Systems PowerBOSS 8000 PowerMaster
Generac Power Systems 8 - 20kW Air-cooled Automatic Standby Generators
Generac Power Systems 8kW 11kW
Generac Power Systems 8 KVA
Generac Power Systems LP5500
Generac Power Systems LP3250
Generac Power Systems LP Series
Generac Power Systems 8.75
Generac Power Systems quietpact 85d
Generac Power Systems 8617
Generac Power Systems 8543
Generac Power Systems 004066-0
Generac Power Systems 004366-0
Generac Power Systems 004742-0
Generac Power Systems 004744-0
This manual is also suitable for:
10 kw
20 kw
12.5kw
Table of Contents
Save PDF
Print
Rename the bookmark
Delete bookmark?
Delete from my manuals?
Login
Sign In
OR
Sign in with Facebook
Sign in with Google
Upload manual
Upload from disk
Upload from URL
Ask me if you need help
Need help?
Do you have a question about the 8kW and is the answer not in the manual?
Questions and answers