On Screen Diagnostics; Main Diagnostics Menu; Digital Diagnostics - Generac Power Systems PowerManager PM-GC Manual

• MAINTENANCE SCHEDULE: A display of percent-
age remaining before maintenance is required.
Figure 7 — TYPICAL HELP SCREEN - ANALOG
Return to Last Screen
3.3

ON SCREEN DIAGNOSTICS

Generac provides diagnostics through both the front
panel display and remotely through Genlink. The fol-
lowing text refers exclusively to the front panel dis-
play.
The main diagnostic screen allows access to the sub
screens and also acts as the diagnostic screen for dig-
ital I/O. All of the raw unprocessed digital inputs are
displayed on this screen. Any digital output can be
overridden on this screen.
The state of the digital
inputs (1=Active).
The state of the digital
outputs (1=Active).
Output channel to test
(via operate button).
8 Generac ® Power Systems, Inc.
Section 3 — Operation
PM-GC
HELP
Figure 8 — Main Diagnostics Menu
Select output channel
to override.

3.3.1 MAIN DIAGNOSTICS MENU

See Figure 8.

3.3.2 DIGITAL DIAGNOSTICS

Inputs to the controller are internally pulled to 5VDC,
so to activate an input, short it to ground. This will be
seen as a '1' (meaning active) on the diagnostic screen.
To test equipment that is connected to a digital input,
such as a digital sensor, first display the diagnostics
menu shown above, then operate the sensor or short it
out. Only one of the inputs should change to a '1'.
Inputs are numbered 1-32 to correspond with the cir-
cuit diagram. Refer to this diagram to see that the cor-
rect input has operated.
Outputs from the controller are generally open col-
lector, meaning that they sink current through a load
and will NOT change any voltage on them when they
are activated, unless they are connected to a load.
The main diagnostics display shows the current state
of the outputs which will change as the normal con-
trol program is still running. For example, if the
engine cranks while viewing this page, some outputs
will turn on. Note that the update rate for the screen
is only about one to two seconds, so any fast chang-
ing outputs will not be seen. The state of an output
can be overridden for a limited time with the
"Operate" button. First, select which output to oper-
ate with the aid of the circuit diagram (outputs 1-32),
then press the operate button to turn it on or off for
three seconds. Use this feature to test things like the
crank relay, etc.
Operate (override) output
for three seconds.
Access to analog
diagnostics.
Access to communications
diagnostics.
Used to reprogram the
display.