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Test 7 – Testing The Stator With A Vom
(12-20 kW)...........................................44
Test 8 – Test Brushless Stator..........................45
Test 9 – Check Capacitor .................................46
Test 10 – Test DPE Winding on
Brushless units ....................................47
Test 11 – Resistance Check Of Rotor Circuit
(12-20 kW)...........................................48
Test 12 – Check Brushes And Slip Rings
(12-20 kW)...........................................48
Test 13 – Test Rotor Assembly(12-20 kW) .......49
Test 14 – Check AC Output Frequency ............49
Test 15 – Check and Adjust Engine Governor
(Single Cylinder Units) .........................49
Test 16 – Check Stepper Motor Control
(V-twin Engine Units) ...........................50
Test 17 – Check And Adjust Voltage
Regulator (12-20 kW) ..........................51
Test 18 – Check Voltage And Frequency
Under Load..........................................52
Test 19 – Check For Overload Condition ...........52
Test 20 – Check Engine Condition ...................52
Test 21 – Field Flash Alternator (8-10 kW) ......52
PART 3 - TRANSFER SWITCH ...............................55
3.1 Description and Components .......................... 56
General ............................................................56
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
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