Yamaha EF3000iSE Service Manual page 255

DC circuit breaker inspection
Check the DC circuit breaker for continuity with the DC
circuit breaker set to "RESET" "
CONTINUITY
Start the engine.
Check the AC output indicator.
TURNS ON
Rated engine speed inspection
Operate the engine with no load.
Set the economy switch to "OFF" "
3,550 r/min
GOOD
Subcoil AC voltage inspection
Disconnect the subcoil coupler 1.
Connect the Blue leads, and then connect the Orange
leads.
1
L
L
L
O
L
O
Start the engine.
Connect the tip of the probe of pocket tester to the Blue
leads.
Measure the voltage. (Tester range: AC 120 V)
L
L O O
L
O
L O O
O
Subcoil AC voltage:
13.5 ~ 23.0 V
GOOD
*
GENERATOR SYSTEM
WEAK OR NO DC CURRENT
".
NO CONTINUITY
DOES NOT TURN ON
".
OUT OF SPECIFICATION
O O L
O O L
SWL4200
L
L
SWL4210
TOO LOW
DOES NOT GENERATE
Replace the DC circuit breaker.
Replace the AC output indicator.
Check the throttle control system.
Refer to "THROTTLE CONTROL SYSTEM" in CHAP-
TER 3.
Magnetic force is weak.
Replace the generator assembly.
Subcoil resistance measurement
Stop the engine.
Measure the resistance between the Blue leads.
(Tester range: Ω × 1)
L
L
O
O
SWL4220
Subcoil resistance:
0.07 Ω ± 20% at 20 °C (68 °F)
GOOD
Replace the generator assembly.
4-22
–
ELEC
L O
L O
DISCONNECTED/
SHORT CIRCUIT
+