CAUTION
To prevent damage to the control, make sure that the alternator or other
battery-charging device is turned off or disconnected before
disconnecting the battery from the control.
CAUTION
To prevent damage to the engine, apply power to the 721 control at least
15 seconds prior to starting the engine. The control must have time to
complete its power up diagnostics and become operational. Do not start
the engine unless the green POWER AND CPU OK indicator on the 721
control cover comes on, because test failure turns off the output of the
control.
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