Appendix
113
Siemens Building Technologies
Fire Safety & Security Products
09.2008
16.4 Appendix E: SPC Controller Status LEDs
LED Function
LED 1
Battery Status
ON: battery voltage has dropped below the deep discharge level (10.9 V)
OFF: battery status OK
LED 2
Mains Supply
ON: Mains failure
OFF: Mains OK
LED 3
X-BUS Status
ON: X-BUS configuration is functioning normally. A fast flash indicates discovery mode.
FLASHING: Detects end of line Expanders or break in wiring.
LED 4
System Fault
ON: a hardware fault has been detected on the board
OFF: no hardware fault has been detected
LED 5
Writing to Flash
ON: system is writing to flash memory
OFF: system is not writing to flash memory
LED 6
Heartbeat
FLASHING: system is functioning normally
ON
OFF
FLASHING
Tab. 28
SPC Controller Status LED’s