2-7
Generator Diagnostics
Use extreme care when handling the stator and
rotor . DO NOT set them on their windings .
Damage will occur .
Once the rotor has been removed, unsolder the
diode or diodes, depending on the model, using
caution not to damage it by overheating.
Set your meter to the diode checker scale or the
highest ohm scale if your meter does not have a
diode checker. Test across the diode and note the
reading.
Switch the meter leads and test again, noting the
reading. You should have continuity, or a resistance
reading, in one direction, but not in the other direc-
tion.
The diode is bad if you have continuity in both direc-
tions, or an open circuit in both directions.
The last step is testing the Main Field Coil or better
known as the rotor windings.
The resistance test must be done with the diode(s)
still unsoldered. Connect the meter to both ends of
the rotor windings, using care not to touch both
leads with your hands, as this will cause the meter
to read your body’s resistance.
CHECKING ROTOR RECTIFIER
IN ONE DIRECTION
CHECKING ROTOR RECTIFIER
IN OPPOSITE DIRECTION
ROTOR RESISTANCE TEST
Summary of Contents for EF4500iSE - Inverter Generator
Page 1: ...YAMAHA GENERATOR THEORY DIAGNOSTICS GUIDE...
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Page 50: ...2 16 Yamaha Generator Theory Diagnostics Guide...
Page 51: ...2 17 Generator Diagnostics...
Page 53: ...2 19 Inverter Generator Diagnostics...
Page 54: ...2 20 Yamaha Generator Theory Diagnostics Guide...
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Page 101: ...3 25 Current Model Specifications and Wiring Diagrams EF2800i INVERTER GENERATOR EF2800i...
Page 102: ...3 26 Yamaha Generator Theory Diagnostics Guide EF2800i WIRING DIAGRAM...
Page 103: ...3 27 Current Model Specifications and Wiring Diagrams EF2800i 5W 30...
Page 104: ...3 28 Yamaha Generator Theory Diagnostics Guide...
Page 105: ...3 29 Current Model Specifications and Wiring Diagrams EF2800i...
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Page 107: ...3 31 Current Model Specifications and Wiring Diagrams EF2800i...
Page 108: ...3 32 Yamaha Generator Theory Diagnostics Guide...
Page 117: ...3 41 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 118: ...3 42 Yamaha Generator Theory Diagnostics Guide INVERTER GENERATOR EF4000DE...
Page 119: ...3 43 Current Model Specifications and Wiring Diagrams YG4000DE 5W 30...
Page 120: ...3 44 Yamaha Generator Theory Diagnostics Guide...
Page 121: ...3 45 Current Model Specifications and Wiring Diagrams YG4000DE...
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Page 123: ...3 47 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 124: ...3 48 Yamaha Generator Theory Diagnostics Guide...
Page 125: ...3 49 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 126: ...3 50 Yamaha Generator Theory Diagnostics Guide INVERTER GENERATOR EF4500iSE...
Page 127: ...3 51 Current Model Specifications and Wiring Diagrams EF4500iSE EF4500iSE WIRING DIAGRAM...
Page 128: ...3 52 Yamaha Generator Theory Diagnostics Guide...
Page 129: ...3 53 Current Model Specifications and Wiring Diagrams EF4500iSE 5W 30...
Page 130: ...3 54 Yamaha Generator Theory Diagnostics Guide...
Page 131: ...3 55 Current Model Specifications and Wiring Diagrams EF4500iSE...
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Page 133: ...3 57 Current Model Specifications and Wiring Diagrams EF4500iSE...
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Page 135: ...3 59 Current Model Specifications and Wiring Diagrams EF4500iSE...
Page 136: ...3 60 Yamaha Generator Theory Diagnostics Guide...
Page 147: ...3 71 Current Model Specifications and Wiring Diagrams EF6300iSDE INVERTER GENERATOR EF6300iSDE...
Page 148: ...3 72 Yamaha Generator Theory Diagnostics Guide EF6300iSDE WIRING DIAGRAM...
Page 149: ...3 73 Current Model Specifications and Wiring Diagrams EF6300iSDE...
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Page 151: ...3 75 Current Model Specifications and Wiring Diagrams EF6300iSDE...
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Page 164: ...3 88 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 165: ...3 89 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 166: ...3 90 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 167: ...3 91 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 168: ...3 92 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 169: ...3 93 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 170: ...3 94 Yamaha Generator Theory Diagnostics Guide CONVENTIONAL GENERATOR EF12000DE Control Box...
Page 171: ...3 95 Current Model Specifications and Wiring Diagrams EF1200DE EF12000DE WIRING DIAGRAM...
Page 180: ...3 104 Yamaha Generator Theory Diagnostics Guide CONVENTIONAL GENERATOR YG4000D...
Page 181: ...3 105 Current Model Specifications and Wiring Diagrams YG4000D...
Page 182: ...3 106 Yamaha Generator Theory Diagnostics Guide YG4000D WIRING DIAGRAM...
Page 183: ...3 107 Current Model Specifications and Wiring Diagrams YG4000D...
Page 184: ...3 108 Yamaha Generator Theory Diagnostics Guide 5W 30...
Page 185: ...3 109 Current Model Specifications and Wiring Diagrams YG4000D...
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Page 187: ...3 111 Current Model Specifications and Wiring Diagrams YG4000D...
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Page 189: ...3 113 Current Model Specifications and Wiring Diagrams YG4000D...
Page 190: ...3 114 Yamaha Generator Theory Diagnostics Guide...
Page 218: ...2009 Yamaha Motor Corporation U S A Printed in U S A LIT BKTEC GN 01...