Serial Hall and Car Call Boards
1-45
element
TM
Series
On Board Diagnostics Two LEDs provide diagnostic information: The ON LED
(green) and the FLT LED (red).
ON LED The ON LED reflects power/communications status.
•ON: Communications OK
• OFF: Board is not receiving power or has no software loaded.
• Blinking: Communications error - more than ten seconds have passed without a message
from the group dispatcher.
(FLT) FAULT LED The FLT LED reflects the status of the analog outputs.
• ON steady: Internal fault -
•Replace board if problem persists
• OFF: No Errors detected.
• Blinking: Output overload or disconnection. Pressing the Reset button on the SC-3HN
board will clear a blinking Fault LED.
• Board inventory not yet run. See Hall Bus Inventory on page 2-17.
• Overload: Excessive current draw. Resets when current draw is corrected and call but-
ton is pressed again.
• Not Connected: The output is on (button pressed) but nothing is connected to the UL-
or DL- output. Resets when the lamp is connected and the call button is pressed again.
• Output Shorted: If short is very quick, the LED will flash. Pressing the call button for a few
moments will cause the board to reboot. Resets when the short is removed and the call
button is pressed again.
Inventory When all halls calls are installed and functioning properly, the system allows
you to save them into memory (inventory them). In the future, when looking for a burned out
LED or a stuck switch, the same UI screen will automatically test all inventoried hall calls for
you. See Hall Bus Inventory on page 2-17.
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