Automatic Transfer Operation; Sequence Of Automatic Operation; Utility Failure - Generac GH-410 Manual Del Propietário

10 to 20 KW - INSTALLATION ASSISTANT
Upon first power up of the generator, the display interface will
begin an installation assistant. The assistant will prompt the user
to set the minimum settings to operate. These settings are sim-
ply: Current Date/Time and Exercise Day/Time. The maintenance
intervals will be initialized when the exercise time is entered (Figure
3.2).
The exercise settings can be changed at any time via the "EDIT"
menu (see Appendix, "Menu System").
If the 12 volt battery is disconnected or the fuse removed, the
Installation Assistant will operate upon power restoration. The
only difference is the display will only prompt the customer for the
current Time and Date.
IF THE INSTALLER TESTS THE GENERATOR PRIOR
TO INSTALLATION, PRESS THE "ENTER" KEY TO
AVOID SETTING UP THE EXERCISE TIME. THIS WILL
ENSURE THAT WHEN THE CUSTOMER POWERS UP
THE UNIT, HE WILL STILL BE PROMPTED TO ENTER
AN EXERCISE TIME.
The exerciser will only work in the AUTO mode and
will not work unless this procedure is performed.
The current date/time will need to be reset every time
the 12 volt battery is disconnected and then recon-
nected, and/or when the fuse is removed.
3.1.3 DISPLAY INTERFACE
8 kW LED Display
Seven (7) LED's are provided for user status indications. The LED
functions are:
1. System Ready (green)
2. Low Battery (red)
3. Low Oil Pressure (red)
4. High Oil Temperature (red)
5. Over Speed (red)
6. RPM Sensor Loss (red)
7. Over Crank (red)
See the Protection Systems section for details.
10 to 20KW DISPLAY INTERFACE MENUS
The LCD display is organized as detailed below:
• The "Home" page, this page is the default page which will be
displayed if no keys are pressed for 30 seconds. This page
normally shows the current Status message and the current
date and time. The highest priority active Alarm and/or Warning
will be automatically posted on this page as well as flashing
the backlight when such an event is detected. In the case of
multiple Alarms or Warnings, only the first message will be
displayed. To clear an Alarm or Warning, see the Protection
Systems section - Clear Alarm.
• The display backlight is normally off. If the user presses any
key, the backlight will come on automatically and remain on for
30 seconds after the last key was pressed.
18
Section 3 — Operation
Air-cooled Generators
NOTE:
• The "Main Menu" page will allow the user to navigate to all other
pages or sub-menus by using the Left/Right and Enter keys.
This page can be accessed at any time with several presses of
the dedicated Escape key. Each press of the Escape key takes
you back to the previous menu until the main menu is reached.
This page displays the following options: HISTORY; STATUS;
EDIT; AND DEBUG. (See the Appendix - "Menu System".)
3.2

AUTOMATIC TRANSFER OPERATION

To select automatic operation, do the following:
1. Make sure the transfer switch main contacts are set to their
UTILITY position, i.e., loads connected to the utility power
source (Figure 3.2).
2. Be sure that normal UTILITY power source voltage is avail-
able to transfer switch terminal lugs N1 and N2 (Refer to the
Electrical Data section).
3. Set the generator's AUTO/OFF/MANUAL switch to AUTO.
4. Set the generator's main circuit breaker to its ON (or CLOSED)
position.
With the preceding steps complete, the generator will start auto-
matically when utility source voltage drops below a preset level.
After the unit starts, loads are transferred to the standby power
source. Refer to the Sequence of Automatic Operation section.
3.3

SEQUENCE OF AUTOMATIC OPERATION

3.3.1

UTILITY FAILURE

Initial Conditions: Generator in Auto, ready to run, load being sup-
plied by utility source. When utility fails (below 70% of nominal),
a 10 second line interrupt delay time is started. If the utility is still
gone when the timer expires, the engine will crank and start. Once
started, a 20 to 50 second selectable engine warm-up timer will be
initiated. When the warm-up timer expires, the control will transfer
the load to the generator. If the utility power is restored (above 80%
of nominal) at any time from the initiation of the engine start until
the generator is ready to accept load (and the warm-up time has
not elapsed), the controller will complete the start cycle and run
the generator through its normal cool down cycle; however, the
load will remain on the utility source.
3.3.2 CRANKING
The system will control the cyclic cranking as follows: 16 second
crank, seven (7) second rest, 16 second crank, seven (7) second
rest followed by three (3) additional cycles of seven (7) second
cranks followed by seven (7) second rests.
Choke Operation
1. The 990/999cc engines have an electric choke in the air
box that is automatically controlled by the electronic control
board.
2. The 530cc engines have an electric choke on the divider panel
air inlet hose that is automatically controlled by the electronic
control board.
3. The 410cc engines have a choke behind the air box that is
automatically controlled by the electronic control board.