Section 1.6 - Operating Instructions; Control Panel; User Interface - Generac Power Systems 7 kW NG Repair Manual

GENERAL INFORMATION

CONTROL PANEL

Figure 21. Nexus Controller Panel

With the switch set to AUTO, the engine may crank
and start at any time without warning.
Such automatic starting occurs when Utility power
source voltage droops below a preset level or during
the normal exercise cycle. To prevent possible
injury that might be caused by such sudden starts,
always set the switch to OFF and remove the fuse
before working on or around the Generator or transfer
switch. Then, place a "DO NOT OPERATE" tag on the
Generator panel and on the transfer switch.
AUTO-OFF-MANUAL Switch
AUTO Position – Selecting this switch activates fully automatic
system operation. It also allows the unit to automatically start
and exercise the engine every seven days with the setting of the
exercise timer (see Section 5.2 "Setting the Exercise Timer").
OFF Position – This switch position shuts down the engine.
This position also prevents automatic operation.
MANUAL Position – Set the switch to MANUAL to crank and
start the engine. Transfer to standby power will not occur
unless there is a Utility failure.
7.5 Amp Fuse
This fuse protects the controller as well as the DC components
against overload. If the fuse element has melted open due to
an overload, engine cranking or running will not be possible.
Should a fuse replacement become necessary, use only an
identical 7.5 amp replacement fuse.
PART 1

USER INTERFACE

Exercise Time
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.
See Section 5.2 for information on setting the exercise time.
Note: The exerciser will only work with the AUTO-OFF-
MANUAL switch in the AUTO position.
Activation Wizard
When battery power is applied to the Generator during the
installation process, the controller will light up. However, if
the Generator is not activated it will NOT automatically run
in the event of a power outage. Activating the Generator is a
simple one-time process that is guided by the controller screen
prompts. Once the product is activated, the controller will not
prompt you again, even if the battery is disconnected. See
Section 5.2 for the activation wizard procedure.
Installation Wizard
During the initial setup of the controller, an interconnection self-
test will load on the screen.
Upon power up, this controller will go through a system self
test which will check for the presence of Utility voltage on the
DC circuits. If the installer mistakenly connects the AC Utility
sense wires onto the DC terminal block the controller may be
rendered inoperable. If the self-test failed and detected Utility
voltage on the DC circuits, the controller will display a warning
message and lock out the Generator, preventing damage to
the controller. Power to the controller must be cycled for this
warning message to clear. Utility voltage on N1 and N2 must
be present inside the Generator control panel for the self-test to
begin. Each time power to the controller is cycled the self-test
will check for correct wiring.

Damage caused by improper wiring of the control wires
is not warrantable!
Time and Date
After the successful completion of the installation wizard, the
controller will prompt the user to set the minimum settings to
operate. The prompts are as follows: current date, current
time, exercise time, and exercise day. These settings may be
changed at any time utilizing the "EDIT" menu. See Section 4.1
for "Menu Navigation"
Note: Maintenance interval initialization will take place
when the exercise time is set.
If the 12-volt battery or fuse is removed, the Installation
Wizard will operate when power has been restored. The
only prompts that will follow are the current time and date.
Note: To test the Generator prior to installation, press the
Section 1.6
Operating Instructions
Page 25