Yamaha EF4500iSE - Inverter Generator, Theory & Diagnostics Manual

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2-25
Inverter Generator Diagnostics
5-8
GENERATOR SYSTEM
ELEC
GENERATOR SYSTEM
TROUBLESHOOTING CHART
WEAK OR NO AC CURRENT
Start the engine.
Check the overload warning light.
DOES NOT LIGHT ON LIGHT ON
Start the engine.
Check the pilot light.
DOES NOT LIGHT ON LIGHT ON
No load engine speed inspection.
9
Operate the engine with no load.
2,600 r/min
GOOD OUT OF SPECIFICATION
Check the overload warning light.
LIGHT ON DOES NOT LIGHT ON
Check the pilot light.
Check the throttle control system.
Refer to “THROTTLE CONTROL SYSTEM” in
CHAPTER 6.
Main coil AC voltage inspection
9
Start the engine.
9
Connect the pocket tester to the White leads.
9
Measure the voltage. (Tester range: AC 300 V)
GOOD
TOO LOW
DOES NOT GENERATE
W
W W
Y
Y Y
Main coil AC voltage:
175 ~ 225 V at 20 °C (68 °F)
Magnetic force is weak.
Replace the magneto rotor.
Main coil resistance measurement
9
Stop the engine.
9
Measure the resistance between the White leads.
(Tester range:
Ω ×
1)
SPECIFICATION OUT OF SPECIFICATION
W
W W
Main coil resistance:
1.22
Ω
± 20% at 20 °C (68 °F)
Replace the stator assembly.
*
7CF10-05 05.5.6 20:17 Page 8
Refer to Service Data Section for Specifications
Refer to Service Data Section for Specifications
WEAK OR NO AC CURRENT: SINGLE AC COIL MODELS