Briggs & Stratton 6404, Installation And Operation Manual

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The generator is equipped with an exercise timer. During
the exercise period, the unit runs for approximately
20 minutes and then shuts down. Electrical load transfer
DOES NOT occur during the exercise cycle (unless an
utility power outage occurs).
The generator will only enter the exercise cycle if the
unit is in the AUTO mode and this exact procedure is
followed.
To set the exercise timer:
NOTICE The generator is set with a deservice code
exercise cycle setting of Tuesday at 2:00 P.M, Central Time.
To change the cycle setting, proceed to the following steps:
1. Choose the day and time you want your generator to
exercise.
2. Press and hold the left arrow and right arrow
simultaneously for three seconds to enter the
General Set-Up program mode. See General Set-
Up flow chart in Menu Section.
3. Verify and/or set the time and date on the unit.
4. Go to the SET EXERCISE prompt and hit the “OK”
button.
NOTICE Items will flash until they are selected.
Setting Exercise Timer
SELECT DAY: Use the left or right arrow to toggle
through the days of the week, Once the day is
selected, hit the “OK” button.
SELECT HOUR: Use the left or right arrow to toggle
through between 1 and 12. Choose the hour of day
you want the generator to exercise then hit the “OK”
button.
SELECT MINUTE: Use the left of right arrow to
toggle between :00 and :59. Choose the minute of
the day you want the generator to exercise then hit
the “OK” button.
SELECT AM/PM: Use the left of right arrow to toggle
between AM and PM. Once chosen, hit the “OK”
button.
NOTICE During the weekly exercise cycle, the generator
will run for 20 minutes, but it will not supply power to the
home. During the exercise cycle, the in-home monitor will
continue blinking the GENERATOR READY green LED.
If you want to change the day and time the unit exercises,
simply perform the procedure again.
To turn off the generator exercise cycle, go to the OFF
selection within the day of the week menu and press OK.
The display will then scroll: EXERCISE CYCLE OFF.
Automatic Operation
The generator’s control board constantly monitors utility
voltage. Should utility voltage drop below a preset level, the
control board will signal the engine to crank and start.
When utility voltage is restored above a preset voltage
level, the engine is signaled to shut down.
The actual system operation is not adjustable and is
sequenced by sensors and timers on the control board,
as follows:
Utility Voltage Dropout Sensor
• This sensor monitors utility source voltage.
• If utility source voltage drops below about
70 percent of the nominal supply voltage, the
sensor energizes a 3 second timer. The timer is
used to ‘sense’ brown-outs.
• Once the timer has expired, the engine will crank
and start.
Utility Voltage Pickup Sensor
This sensor monitors utility voltage. When utility voltage is
restored above 80 percent of the nominal source voltage, a
time delay starts timing and the engine will go to engine cool-
down.
Engine Cool-down Timer
When utility power is sensed and the load transfers back to
the utility source, the engine will go into a cool down period
as described below:
• If the generator has run for MORE than 5 minutes,
once the utility transfer occurs, the engine will
continue to run for about 1 minute before shutting
down.
• If the generator has run for LESS than 5 minutes, once
the utility transfer occurs, the engine will continue to
run until 5 minutes has elapsed before shutting down.
Not for
Reproduction