Generac Power Systems CorePower 6/7 kW 60 Hz Diagnostic Repair Manual page 19

GENERAL INFORMATION
6. If the sequence is CORRECTLY entered, all the LEDs will
scroll from bottom to top 5 times. The OFF button will light.
The activation process has been performed successfully and
the generator is ready to operate.
Before Starting
Complete the following:
1. Ensure that the generator is OFF.
2. Set the generator's main circuit breaker to the OFF (or
OPEN) position.
3. Turn off all breakers that will be powered by the generator.
4. Check the engine crankcase oil level and, if necessary, fill to
the dipstick FULL mark with the recommended oil. Do not fill
above the FULL mark.
5. Check the fuel supply. Gaseous fuel lines must have
been properly purged and leak tested in accordance with
applicable fuel-gas codes. All fuel shutoff valves in the fuel
supply lines must be open.
NOTE: During initial start up only, the generator may exceed
the normal number of start attempts and experience an
"overcrank" fault. This is due to accumulated air in the fuel
system during installation. Reset the control board by push-
ing the OFF button twice, and restart up to two more times
if necessary. If unit fails to start, contact a local dealer for
assistance.
7.5 Amp Fuse
This fuse protects the controller as wells as the DC components
against overload. If the fuse element has melted open due to an
overload, engine cranking and or running will not be possible.
Should a fuse replacement become necessary, use only an
identical 7.5 amp replacement fuse.
USER INTERFACE
The generator is equipped with an internal exercise timer. Once
set, the Generator will start and exercise every seven days, on the
day of the week and the time of day specified. During this exercise
period, the unit runs for approximately 12 minutes and then shuts
down. Transfer of loads to the Generator output does not occur
during the exercise cycle unless Utility is lost. Refer to "Setting the
exercise time" in Section 1.4.
Note: The exercise function will only work with the controller
in the AUTO mode.
AUTOMATIC OPERATION
CAUTION! The Generators Voltage and Frequency must

be verified with the Generator Main Line Circuit Breaker
(MLCB) OFF or OPEN Prior to selecting Automatic or
Manual operation!
PART 1
To select automatic operation
The following procedure applies only to those installations which
utilize an air-cooled generator in conjunction with a transfer switch.
Residential transfer switches do not have intelligent circuits of
their own. Printed circuit board logic in the controller controls the
automatic operation of the transfer switch and the generator.
To select automatic operation when a transfer switch is installed
along with a home standby generator, the procedure is as follows.
1. Ensure that the transfer mechanism in the transfer switch
is in the "Utility" position. If needed, turn OFF or OPEN
the Utility source Main Line Circuit Breaker and manually
transfer the breaker to the "Utility" position.
2. CLOSE or turn ON the Utility source Main Line Circuit
Breaker and ensure Utility voltage is available to the
UTILITY terminals N1 and N2.
3. Actuate the generator main line circuit breaker (MLCB) to the
"Closed" position.
4. Set the generator controller to the AUTO mode.
Following the procedure of Steps 1 through 4, a dropout of Utility
voltage below a preset level will result in automatic Generator
cranking and start-up. Following startup, the transfer switch will
actuate to the "Standby" position.
MANUAL OPERATION
Transfer to "Standby" and Manual Startup
To transfer electrical loads to the Generator and to start the
generator manually, the procedure is as follows:
1. On the generator, set the controller switch to the OFF mode.
2. On the generator, set the main line circuit breaker (MLCB) to
the "Open" position.
3. Locate a means of Utility disconnect and set it to the OFF
position.
4. Manually actuate the breaker to the "Standby" position in the
transfer switch.
5. On the generator, set the controller switch to the MANUAL
mode.
WARNING! Engine will crank and start!

6. Let the engine warm up and stabilize for a minute or two at
no-load. Set the generators MLCB to the "Closed" position.
Generator voltage should now be available to the transferred
electrical loads.
Retransfer Back to "Utility" and Manual Shutdown
To shutdown the generator and retransfer electrical loads back to
the "Utility" position, the procedure is as follows:
Section 1.4
Operating Instructions
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