Status signalling with LEDs and status messages
7-7
7.3 Status signalling with LEDs and status messages
Built-In Test Equipment
The ADU and the ACU have a Built-In Test Equipment (BITE) function in order to make
fault diagnostics easy during service and installation. The BITE test is performed during:
• Power On Self Test (POST), which is automatically performed each time the system is
powered on.
• Person Activated Self Test (PAST), which is initiated by starting a self test in the web
interface HELPDESK > Self test.
For details on error messages after a POST or a self test see Event list on page 7-2.
Means of signalling
The FV-110 provides various methods for signalling the system status. LEDs on the front
panel of the ACU are used to signal:
• Power on/off
• Logon
•Fail/Pass
The built-in web interface of the ACU shows any events (BITE error codes) with a short
message describing each error. This is also displayed in the ACU.
In an error situation, one of the following system status messages may be shown:
• ACU POST error
• ADU POST error
• SAFE MODE (plus information about the specific error, see System messages on
page G-1).
7.3.1 LEDs of the ADU modules
Each ADU module has a Power and a Service LED.
For a list of modules see Removal and replacement of ADU modules on page 7-9.
LED Behaviour Description
Power Steady green Power supply OK
Off No power
Service Steady green Module ok, application
running.
Flashing green Waiting for upload
Flashing red/green Uploading application
Steady red Module error or loading error
Table 7-1: LEDs of the ADU modules
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