Automatic Operation Sequence; Setting The Exercise Timer; Maintenance; Servicing The System - Briggs & Stratton FORTRESS Series Installation And Operation Manual

conditions. Before starting the engine, check the oil level as
described in Maintenance.
NOTICE Any attempt to crank or start the engine without
being correctly filled with the recommended oil will result in
equipment failure.
• Damage to equipment resulting from failure to obey this
instruction will void engine and generator warranty.
Battery
The installer must supply a rechargeable 12 volt DC starting
battery. See Battery in Final Installation Considerations in this
manual.
15 Amp Fuse
Make sure that the fuse is correctly installed before operating
your generator.

Automatic Operation Sequence

The generator's control board monitors utility voltage. If the
utility voltage drops below a preset level, the control board
will signal the engine to crank and start. When the 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 the utility source voltage.
• If the utility source voltage drops below approximately 70
percent of the nominal supply voltage, the sensor initiates
a 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 the utility voltage. When the utility
voltage is restored above approximately 80 percent of the
nominal source voltage, a shut-down timer is initiated and the
engine will go to engine cool-down.
Engine Cool-down Timer
When the utility power is sensed, the load transfers to the
utility source and the engine will go into a 5 minute cool down
period.

Setting the Exercise Timer

1. Push and hold the Stop/Config button (B).
2. Push the Start/Select button (C) to enter WRITE MODE.
3. Enter the password (0000) by using the arrow keys (A)
and the Start/Select button (C).
4. In the CONFIGURATION screen use the arrow keys (A)
to find MODULE.
5. Push the Start/Select button (C) and using the arrow keys
(A) find AUTO EXERCISE.
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6. Push the Start/Select button (C) and using the arrow
keys (A) select each parameter and choose the desired
settings.
7. When completed, push and hold the Stop/Config button
(B) to save your settings.
A detailed list of all the on screen parameters is located in
the Configuration of GCU section inside the online "Operation
Instructions GC1031 GENSET Controller" manual (part
number 80086364)

Maintenance

Servicing the System

WARNING
Generator voltage could cause electrical shock or
burn resulting in death or serious injury.
• DO NOT allow unqualified persons to operate or service
generator.
WARNING
With the battery connected, the generator may crank and
start without warning resulting in death or serious injury.
• Before servicing, stop the generator and disconnect the
negative (-) cable at the battery.
Before performing any generator maintenance, always do the
following steps
1. Push the ON/OFF Switch on the side of the generator to
the "OFF" (0) position.