Section 4 - Maintenance; Fuses - Generac Power Systems 7kW Installation And Owner's Manual

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.
10, 13, 16 & 18kW 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 genera-
tor from supplying an output that could potentially
damage appliances connected to the generator cir-
cuit. Contact the nearest Authorized Dealer if this
failure occurs.
3.6.5 RPM SENSOR FAILURE
10, 13, 16 & 18kW Operation
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, than re-crank the engine.
18
Section 4 — Maintenance
Air-cooled Generators
NOTE: • 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 over speed LED.
7 KW Operation
During cranking, if the control board does not see a
valid RPM signal within three (3) seconds, it will shut
down and latch out on RPM sensor loss.
The control board will continue the standard crank/
reset sequence. At the end of the crank/reset cycle,
the control board will latch out on over crank (if RPM
are never seen). The control board will not energize
fuel solenoid until it sees RPM.
In the event the control board sees RPM during
crank, and then RPM are lost during crank, the con-
trol board will shut down the engine (turn off fuel and
ground magneto). The control board will wait two
(2) seconds and then continue the crank sequence
with the next crank cycle (if additional crank cycles
exist).
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.
4.1

FUSES

The 15-amp fuse on the generator panel protects the
DC control circuit against overload (Figure 4.1). This
fuse is wired in series with the battery output lead
to the panel. If this fuse element has melted open,
the engine will not be able to crank or start. Replace
this fuse using only an identical 15-amp replacement
fuse. To replace the fuse, push the fuse holder cap
down and rotate it counterclockwise. Whenever the
fuse is removed or replaced, the exercise timer needs
to be reset.