Yamaha EF12000DE Owner's Manual page 29

ECONOMY SWITCH
ECONOMY SWITCH automatically reduces engine speed when load is OFF, and
automatically increases engine speed to rated r/min when load is ON.
ECONOMY SWITCH provides fuel economy and low noise operation at no-load
running.
(1) HOW TO USE ECONOMY SWITCH
Start the engine with ECONOMY
I
SWITCH off.
TIP
Warm up the engine without a load for a
few minutes.
I Turn ECONOMY SWITCH on.
(2) CHECKING THE OPERATION
When ECONOMY SWITCH does not operate normally, please check following :
I Overloaded ?
Please make it sure that the generator is not overload.
TIP
Most induction loads such as electric motors require three to five times more
wattage than their ratings during starting.
This starting wattage should not exceed the rated output of the generator for prop-
er operation of ECONOMY SWITCH.
I Turn ECONOMY SWITCH off when the ECONOMY SWITCH does not work
normally under the rated output.
TIP
The ECONOMY SWITCH must be turned to "OFF" to increase engine speed to
rated r/min when using a load of 0.04A or less.
The ECONOMY idling speed is 2,400 – 2,700 r/min.
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