Test The E Panel Key Switch - Generac Power Systems E Operating Manual

4. Preheat option. Check to see how the Preheat
option is set. If it is set as either "before start" or
"before and during start" the preheat timer
becomes active.
5. Preheat timer. This number (in seconds) defines
the length of time the E Panel will preheat prior to
cranking.
Example:
Preheat options: the preheat option is set to before
start, and the preheat timer is set to 10.
Result: When a start signal is given, the E Panel will
activate the preheat output for 10 seconds. Once that
10 seconds is over, it will activate the start and fuel
outputs.

TEST THE E PANEL KEY SWITCH

Leave the key switch in each position for a few
seconds. Turning the key too quickly may cause
false test results.
The following steps will signal the generator to
!
start and run.
1. Place the key switch in the off position.
2. Use the left and right arrow keys to go to the
Generator Command page.
With the key switch in the off position, the display
should read "Generator switch off".
3. Turn the key switch to the Auto position. The top
line of the display should read "Generator in auto
mode".
4. Turn the key switch to the manual position. In the
manual position, the E Panel should begin the
engine starting sequence. The display will contin-
ue updating to show the user the progress. This is
discussed in detail in the next test.
If however, the E Panel display shows the key
switch is in either the off or auto positions, the E
Panel has failed and needs to be replaced.
WATCH THE E PANEL DISPLAY DURING THE
START ATTEMPT
Warning: the following steps will signal the
!
generator to start and run.
1. Set the key switch to the off mode.
2. Use the left and right arrow keys to go to the
screen "Generator switch off".
3. Turn the key switch to the manual position.
4. The E Panel display will begin displaying the start
sequence as follows:
32 Generac ® Power Systems, Inc.
Section 3 — Troubleshooting and Diagnosis
E Option Control Panels
NOTE:
4.1 "Preheating": The E Panel is preheating the
engine. (Only occurs if preheat is enabled.)
The start output will not be active during this
time, and the engine should not be cranking.
4.2 "Attempting to start": The E Panel is activat-
ing all the following outputs:
4.2.1 Start solenoid output at CON3-2.
4.2.2 Fuel solenoid output at CON3-1.
4.2.3 Preheat output at CON3-4 and 3-3
(Only if preheat is enabled.)
4.3 "Pausing before start": This indicates the E
Panel is in a rest cycle between start attempts.
4.3.1 The start solenoid output will not be
active.
4.3.2 The fuel solenoid output will not be
active.
4.3.3 The Preheat output will be active (Only
if preheat is enabled).
4.4 The start sequence will now begin cycling
between "attempting to start" and "pause
before start". This cycling will continue for the
programmed number of cycles.
If the engine has not started by the end of the
final cycle, the display will read "failed to
start" and issue a shutdown alarm. This fault
condition is referred to as over crank.
5. TEST RESULTS:
"attempting to start" during the start cycle?
5.1 NO.
5.1.1 Go back and carefully check the start
settings programmed into the E Panel.
5.1.2 Is there an alarm condition present
which is preventing the E Panel from
initiating the start sequence? If yes,
they must be cleared before the E Panel
will attempt to start.
5.1.3 If all of the programmable start param-
eters are correct, and there are no
alarms present, then the E Panel has
failed and needs to be replaced.
5.2 YES. — If the E Panel displayed "attempting
to start" but the engine did not crank, move
on to the next test.
MEASURE THE START SIGNAL IN THE
CONTROL PANEL (REFER TO FIGURE 3.8)
CON3-2 is the start output from the E Panel and
should be at +battery (+12V or +24V) whenever the
E Panel display reads "attempting to start."
Wire #56 is used to connect CON3-2 from the E Panel
to the starter contactor.
All measurements in this test are DC volts with
respect to ground (0) unless otherwise noted.
Did the E Panel display