High Temperature Switch; Overcrank; Overspeed; Section 4 - Maintenance - Generac Power Systems Guardian 04758-2 Installation And Owner's Manual

3.7.2

HIGH TEMPERATURE SWITCH

This switch's contacts (Figure 3.3) 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 3.3 – Low Oil Pressure and
High Temperature Switches
Low Oil Switch
Oil
Drain
Hose
3.7.3

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.
If the fault is not repaired, the overcrank feature
will continue to activate.
3.7.3.1 Approximate Crank Cycle Times
• 15 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• Repeat for 45 seconds
Approximately 90 seconds total
3.7.4

OVERSPEED

This feature protects the generator from damage by
shutting it down if it happens to run faster than the
preset limit. This protection also prevents the gen-
erator from supplying an output that could poten-
tially damage appliances connected to the generator
circuit. Contact the nearest Authorized Dealer if this
failure occurs.
High Temp Switch
Oil Filter
NOTE:
Section 4 — Maintenance
Air-cooled 7 kW, 12 kW and 15 kW Generators
4.1

FUSE

The generator panel's 15 amp fuse (Figure 4.1) pro-
tects the DC control circuit against overload. The fuse
is wired in series with the battery output lead to the
panel. If the fuse element has melted open, the engine
cannot crank or start. Replace the fuse using only an
identical 15-amp replacement.
The generator panel's 5 amp fuse protects the battery
charge circuit against overload. If the fuse element has
melted open, battery charging capability will not be
possible. Replace the fuse using only an identical 5
amp replacement. To remove fuse, push cap down and
rotate counterclockwise.
Figure 4.1 – Generator Control Panel
FUSE
5A
FUSE
15A
4.2 CHECKING THE ENGINE
OIL LEVEL
For oil capacities, see "Specifications," Section 1.5.
For engine oil recommendations, see Section 4.3.1.
To check the engine oil level, proceed as follows
(Figure 4.2):
1. Start the generator by moving the Auto/Off/
Manual switch to the MANUAL position. Allow it
to run for a short while and then shut it down by
moving the switch to the OFF position.
Figure 4.2 — Oil Dipstick and Fill, 7 kW
2. Remove the dipstick and wipe it dry with a clean
cloth.
L o c a t e y o u r n e a r e s t
AUTO OFF MAN.
SET
EXERCISE
TIME
Oil Dipstick and Fill
R
d e a le r a t :
R
POWER SYSTEMS, INC.
SYSTEM SET
LOW OIL
HIGH TEMP.
OVER SPEED
OVER CRANK
F L A S H IN G G R E E N L E D =
N O U T IL IT Y S E N S E
4 F L A S H IN G R E D L E D S =
E X E R C IS E R N O T S E T
17