EXCEL 50 INSTALLATION INSTRUCTIONS
EN1B-0101GE51 R1105D 22
Interface Description (Product Literature No.: EN0B-
0270GE51) for details.
LONWORKS Service LED Diagnostics
The LONWORKS service LED is used to diagnose the state of
the Excel 50 controller. In general:
— The controller is applicationless if the LED illuminates
continuously*.
— The controller has an application but, if the LED is
blinking, it is not configured.
— The controller is running normally if L2 is OFF.
The L
ONWORKS service LED is located on the application
module (see Fig. 39).
Pushing the L
ONWORKS service button will force a new
commissioning of the Excel 50. While commissioning, LED L2
continuously illuminates red for less than 1 minute and
afterwards return to the normal state (L2 = OFF).
A more detailed diagnosis can be carried out by observing the
duration of the ON and OFF states of the service LED in
connection with power ON / OFF. The following figure
illustrates the different service LED behaviors. These are the
most common behaviors, but others are possible since the
state of the service LED is under firmware control and can be
affected both by hardware and software anomalies.
Fig. 40. L
ONWORKS Service LED behavior
Table 22 describes each of the behaviors shown in the
previous figure under different contexts. Again, this list is not
exhaustive and therefore does not provide explanations for
every possible service LED behavior.
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