Guardian 005240 Installation And Owner's Manual page 21

3.6.2 HIGH TEMPERATURE SWITCH
This switch's contacts (Figure 3.3) close if the tem-
perature should exceed approximately 144º C (293º
F), initiating an engine shutdown. The generator will
automatically restart and the LED on the generator
control panel 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 Filter
Oil
Drain
Hose
3.6.3 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
on the generator control panel 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
7kW Units:
• 15 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
If the unit fails to start, the overcrank alarm LED will
be illuminated.
High Temp Switch
NOTE:
Section 3 — Operation
Air-cooled Generators
10kW, 13kW and 16kW Units:
• 16 seconds ON
• 7 seconds OFF
• 16 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
If the unit fails to start, the overcrank alarm LED will
be illuminated.
3.6.4 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.
3.6.5 RPM SENSOR FAILURE
During cranking, if the board does not see a valid
RPM signal within three (3) seconds, it will shut
down and latch out on RPM sensor loss.
During running, if the RPM signal is lost for one full
second the board will shut down the engine, wait 15
seconds, then re-crank the engine.
• If an RPM signal is not detected within the first
three (3) seconds of cranking, the control board
will shut the engine down and latch out on RPM
sensor loss.
• If the RPM signal is detected the engine will start
and run normally. If the RPM signal is subsequent-
ly lost again, the control board will try one more
re-crank attempt before latching out and flashing
the overspeed LED.
3.6.6 LOW BATTERY
The microprocessor will continually monitor the
battery voltage and turn on the Low Battery LED if
the battery voltage falls below 11.0 volts for one (1)
minute. No other action is taken on a low battery
condition. Low battery voltage is a non-latching alarm
which will automatically clear if the battery voltage
rises above 11.0 volts. Battery voltage is NOT moni-
tored during the crank cycle.
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