Yamaha EF2800i - Inverter Generator, Service Manual

Page: 76 / 103

3-48
ENG
TROUBLESHOOTING
THROTTLE CONTROL SYSTEM
ENGINE DOES NOT START, ENGINE STARTS BUT STALLS, ENGINE SPEED
DOES NOT INCREASE, OR ENGINE SPEED IS UNEVEN.
Check AC output.
GOOD NO GOOD Refer to “GENERATOR SYSTEM” in CHAPTER 4.
Rotate the shaft of the throttle control
motor to check if it turns smoothly with
slight resistance.
GOOD NO GOOD Replace the throttle control motor.
Measure the coil resistance between 3-1,
3-2, 3-4, and 3-5 of the throttle control
motor. (Tester range:
Ω ×
100)
250
Ω
± 7% /25 °C (77 °F)
GOOD
OUT OF SPECIFI-
CATION
Replace the throttle control motor.
Check the connections of the wire har-
ness connectors and couplers, and the
wires for an open circuit or short circuit.
GOOD NO GOOD Correct or replace.
Replace the control unit.
5
1
3
2 4
5 4 3 2 1
SVU3870