Generac Power Systems 9 kW NG ユーザーズマニュアル

Page 95

4.1 Description and Components ....................................96

General  ................................................................... 96

Terminal Strip / Interconnection Terminal ................. 96

Circuit Board ............................................................ 96

Auto-Off-Manual Switch ........................................... 96

7.5 Amp Fuse ........................................................... 96

Menu System Navigation ....................................... 102

4.2 Operational Analysis ...............................................104

Introduction ............................................................ 104

Utility Source Voltage Available .............................. 104

Initial Dropout of Utility Source Voltage .................. 106

Utility Voltage Dropout and 

Engine Cranking ...................................... 108

Engine Startup and Running .................................. 110

Initial Transfer to the “Standby” Source .................. 112

Utility Voltage Restored / 

Re-transfer to Utility ................................. 114

Engine Shutdown ................................................... 116

4.3 Troubleshooting Flowcharts .....................................118

Problem 15 – Engine Will Not Crank 
When Utility Power Source Fails ....................... 118

Problem 16 – Engine Will Not Crank When 
AUTO-OFF-MANUAL Switch 
is Set to “MANUAL ............................................ 118

Problem 17 – Engine Cranks 
but Won’t Start ................................................... 119

Problem 18 – Engine Starts Hard and 
Runs Rough / Lacks Power / Backfires ............. 120

Problem 19 – Shutdown Alarm / 
Fault Occurred ................................................... 121

Problem 20 – 7.5 Amp Fuse (F1) Blown ........... 122

Problem 21 – Generator Will Not Exercise ........ 122

Problem 22 – No Low Speed Exercise .............. 122

4.4 Diagnostic Tests ......................................................123

Introduction  ........................................................... 123

Test 56 – Check Position Of 

Auto-Off- Manual Switch  ......................... 123

Test 57 – Try a Manual Start  ................................. 123

Test 58 – Auto-Off-Manual Switch 

(V-Twin Only) ............................................ 123

Test 59 – Test Auto Operations .............................. 124

Test 60 – Check 7.5 Amp Fuse .............................. 124

Test 61 – Check Battery ......................................... 124

Test 62 – Check Wire 56 Voltage ........................... 126

Test 63 – Test Starter Contactor Relay 

(V-twin Only) ............................................ 126

Test 64 – Test Starter Contactor 

(Single Cylinder Engine) .......................... 127

Test 65 – Test Starter Motor ................................... 128

Test 66 – Check Fuel Supply and Pressure ........... 130

Test 67 – Check Circuit Board 

Wire 14 Output ......................................... 131

Test 68 – Check Fuel Solenoid .............................. 132

Test 69 – Check Choke Solenoid ........................... 132

Test 70 – Check for Ignition Spark ......................... 134

Test 71 – Check Spark Plugs ................................. 136

Test 72 – Check Engine / Cylinder Leak 

Down Test / Compression Test ................. 136

Test 73 – Check Shutdown Wire ............................ 137

Test 74 – Check and Adjust 

Ignition Magnetos ..................................... 138

Test 75 – Check Oil Pressure Switch 

and Wire 86 .............................................. 141

Test 76 – Check High Oil 

Temperature Switch ................................. 142

Test 77 – Check and Adjust Valves ........................ 142

Test 78 – Check Wire 18 Continuity ....................... 143

Test 79 – Test Exercise Function............................ 144

Test 80 – Check Cranking and 

Running Circuits ....................................... 144

Test 81 – Check to see if Low Speed 

Function is enabled .................................. 146

Test 82 – Check operation of the 

Choke Solenoid ........................................ 146