Generator System; Troubleshooting Chart - Yamaha EF4500iSE Theory & Diagnostics Manual

GENERATOR SYSTEM

TROUBLESHOOTING CHART

Start the engine.
Check the overload warning light.
DOES NOT TURN ON
Start the engine.
Check the pilot light.
DOES NOT TURN ON
Rated engine speed inspection.
9 Operate the engine with no load.
9 Set the economy switch to "OFF".
5,000 r/min
GOOD
AC coil 1 AC voltage inspection
9 Connect Brown-Green (R-S), Green-Brown (S-T),
and Brown-Brown (R-T) leads.
9 Start the engine, then measure the voltage. (Tester
range: AC300V)
R
AC coil 1
S
T
R
AC coil 2
S
T
AC coil 1 AC voltage:
Refer to Service Data Section for Specifications
130 ~ 260 V at 20 °C (68 °F)
GOOD
*
WEAK OR NO AC CURRENT: DUAL AC COIL (EF1000iS) WEAK OR NO AC CURRENT
TURNS ON
TURNS ON
OUT OF SPECIFICATION
Br Br W
W
Or G Br W
W Br Br W
TOO LOW
DOES NOT GENERATE
GENERATOR SYSTEM
Check the overload warning light.
TURNS ON
Check the pilot light.
Check the throttle control system.
Refer to "THROTTLE CONTROL SYSTEM" in
CHAPTER 6.
Magnetic force is weak.
Replace the magneto rotor.
AC coil 1 resistance inspection
9 Stop the engine.
9 Measure the resistance between Brown-Green
(R-S), Green-Brown (S-T), and Brown-Brown (R-T)
leads. (Tester range: Ω × 1)
R
AC coil 1
T
R
AC coil 2
T
AC coil 1 resistance:
Refer to Service Data Section for Specifications
0.47 Ω ± 20% at 20 °C (68 °F)
SPECIFICATION
Replace the AC coil 1.
5-8
2-23
ELEC
Inverter Generator Diagnostics
DOES NOT TURN ON
S
W Br
Or G
W Br
S
OUT OF SPECIFICATION