Generac Power Systems 10 kW LP Manuel D’Utilisation

Page 55

3.1 Description and Components ...............................................56

General

5

6

Enclosure ............................................................................ 56
Transfer Mechanism ............................................................ 57
Transfer Relay ..................................................................... 57
Neutral Lug ......................................................................... 58
Manual Transfer Handle  ..................................................... 58
Terminal Block  ................................................................... 58
Fuse Holder ........................................................................ 59

3.2 Operational Analysis .............................................................60

Operational Analysis ........................................................... 60
Utility Source Voltage Available  .......................................... 62
Utility Source Voltage Failure  ............................................. 63
Transfer To Standby ............................................................ 64
Transfer To Standby ............................................................ 65
Utility Restored ................................................................... 66
Utility Restored, Transfer Switch 

De-energized ...................................................... 67

Utility Restored, Retransfer Back To Utility ......................... 68
Transfer Switch In Utility ...................................................... 69

3.3 – Troubleshooting Flowcharts ...............................................70

Introduction To Troubleshooting .......................................... 70

Problem 7 – In Automatic Mode,  
No Transfer to Standby .................................................. 70
Problem 8 – In Automatic Mode, Generator 
Starts When Loss of Utility Occurs, 
Generator Shuts Down When Utility  
Returns But There Is No Retransfer To Utility Power / or 
Generator Transfers to Standby During Exercise Or In 
Manual Mode ................................................................. 71
Problem 9 – Blown F1 or F2 Fuse ................................. 71
Problem 10 – Units Starts And Transfer 
Occurs When Utility Power Is On .................................. 72
Problem 11 – No Battery Charge 
(Pre-Packed Load Center) ............................................. 73
Problem 12 – No Battery Charge 
(RTSN + RTSE Transfer Switch) ................................... 73
Problem 13 – No Battery Charge 
(Gen-Ready Load Center) ............................................. 73
Problem 14 – No Battery Charge 
(Load Shed Transfer Switch) ......................................... 73

3.4 Diagnostic Tests ....................................................................74

General  ............................................................................ 74
Test 26 – Check Voltage at 

Terminal Lugs E1, E2 .......................................... 74

Test 27 – Check Manual Transfer Switch Operation ........... 75

Test 28 – Check 23 And 15B 

Wiring/Connections ............................................. 76

Test 29 – Test Transfer Relay TR ........................................ 77
Test 30 – Standby Control Circuit ....................................... 78
Test 31 – Check Wire 23 ..................................................... 78
Test 32 – Utility Control Circuit ............................................ 80
Test 33 – Test Limit Switch SW2 and SW3 ......................... 82
Test 34 – Check Fuses F1 and F2 ...................................... 82
Test 35 – Check N1 and N2 Wiring ..................................... 83
Test 36 – Check N1 and N2 Voltage ................................... 83
Test 37 – Check Utility Sensing Voltage 

at the Circuit Board ............................................. 84

Test 38 – Check Utility Sense Voltage ................................ 84
Test 39 – Check Voltage at 

Terminal Lugs N1, N2 ......................................... 84

Test 40 – Check Battery Charger Supply 

Voltage “Pre-Wire Load Center” .......................... 86

Test 41 – Check Battery Charger Output 

Voltage “Pre-Wire Load Center” .......................... 86

Test 42 – Check Wire 0 and Wire15B 

“Pre-Wire Load Center” ....................................... 86

Test 43 – Check Battery Charger 

Supply Voltage 
“RTSN & RTSE Transfer Switch” ......................... 87

Test 44 – Check Battery Charger 

Output Voltage 
“RTSN & RTSE Transfer Switch” ......................... 87

Test 45 – Check Wire 0/ 

 “RTSN & RTSE Transfer Switch” ........................ 87

Test 46 – Check Battery Charger 

Supply Voltage 
“GenReady Load Center” .................................... 90

Test 47 – Check Battery Charger 

Output Voltage 
“GenReady Load Center” .................................... 90

Test 48 – Check Wire 0/15B  

“GenReady Load Center” .................................... 90

Test 49 – Check Battery Charger 

Supply Voltage 
“Load Shed Transfer Switch” ............................... 92

Test 50 – Check Battery Charger 

Output Voltage 
“Load Shed Transfer Switch” ............................... 92

Test 51 – Check Wire 0 and Wire 15B 

“Load Shed Transfer Switch” ............................... 94