Yamaha EF3000iSE Service Manual page 98

WITH NO LOAD, ENGINE SPEED DOES NOT INCREASE WHEN ECONOMY CONTROL
SWITCH IS SET TO "OFF" "
WITH NO LOAD, ENGINE SPEED DOES NOT DECREASE WHEN ECONOMY CONTROL
SWITCH IS SET TO "ON" "
WITH LOAD, ENGINE SPEED DOES NOT INCREASE WHEN ECONOMY CONTROL SWITCH
IS SET TO "ON" "
Check AC output.
GOOD NO GOOD
Check condition of the throttle con-
trol motor.
GOOD NO GOOD
Check economy switch.
GOOD NO GOOD
Check the connections of the wire
harness connectors and couplers,
and the wires for an open circuit or
short circuit.
GOOD NO GOOD
Defective control unit.
Replace the control unit.
TROUBLESHOOTING
".
".
".
3-57
ENG
Refer to "GENERATOR SYSTEM" in CHAPTER 4.
Replace throttle control motor.
Replace economy switch.
Correct or replace.