Yamaha EF2800i Service Manual page 77

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
Replace the control unit.
TROUBLESHOOTING
Refer to "GENERATOR SYSTEM" in CHAPTER 4.
Replace throttle control motor.
Replace economy switch.
Correct or replace.
3-49
ENG