Generac Power Systems 05176-0 - Manual (Page 19)

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7. Move the switch's main contacts back to their
UTILITY position. For example, load connected
to UTILITY power supply. Refer to "Manual
Operation". Handle and operating lever of trans-
fer switch should be in UP position.
8. Turn on the UTILITY power supply to transfer
switch, using whatever means provided (such as
a UTILITY main line circuit breaker). The UTIL-
ITY power source now powers the loads.
9. Set the generator's AUTO/OFF/MANUAL switch to
its AUTO position. The system is now set for fully
automatic operation.
4.7 SETTING THE EXERCISE TIMER
The generator is equipped with an exercise timer.
Once it is set, the generator will start and exercise
once every seven days, on the day of the week and at
the time of day the following sequence is completed.
During this exercise period, the unit runs for approx-
imately 12 minutes and then shuts down. Transfer of
loads to the generator output does not occur during
the exercise cycle.
A switch on the control panel (see Figure 4.1) allows
for selection of the day and time for system exercise.
To select the desired day and time of day, the follow-
ing sequence must be done at that time.
1. Verify that the AUTO/OFF/MANUAL switch is set
to AUTO.
2. Hold down the set timer switch until the genera-
tor starts (approximately 10 seconds) and then
release.
3. The generator will start and run for approximately
12 minutes and then shut down on its own. The
exerciser will then be set to run at that time of day
every week.
NOTE:
The exerciser will only work in the AUTO mode
and will not work unless this procedure is per-
formed. The exerciser will need to be reset every
time the 12-volt battery is disconnected and then
reconnected. The exerciser WILL NOT work if
dip switch 2 (Remote Not Auto) on the controller
printed circuit board is ON.
4.8 PROTECTION SYSTEMS
4.8.1 LOW OIL PRESSURE SWITCH
This switch (Figure 4.3) has normally closed con-
tacts that are held open by engine oil pressure during
cranking and operating. Should oil pressure drop
below the 8 psi range, switch contacts close, and the
engine shuts down. The unit should not be restarted
until oil is added, and the AUTO/OFF/MANUAL switch
must be turned to OFF and then back to AUTO.
4.8.2 HIGH TEMPERATURE SWITCH
This switch’s contacts (Figure 4.3) close if the tem-
perature should exceed approximately 140º C (284º
F), initiating an engine shutdown. The generator will
automatically restart and the LED will reset once the
temperature has returned to a safe operating level.
Figure 4.3 – Low Oil Pressure and
High Temperature Switches
Oil Filter
Oil
Drain
Hose
Low Oil Switch High Temp Switch
Loose
n
4.8.3 OVERCRANK
This feature prevents the generator from damaging
itself when it continually attempts to start and anoth-
er problem, such as no fuel supply, prevents it from
starting. The unit will crank and rest for a preset time
limit. Then, it will stop cranking, and the LED will
light indicating an overcrank failure. The AUTO/OFF/
MANUAL switch will need to be set to OFF and then
back to AUTO to reset the generator control board.
NOTE:
If the fault is not repaired, the overcrank feature
will continue to activate.
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Section 4 — Operation
Air-cooled 15 kW Generators