Operating instructions

OI: BK MIKRO LIN.B System Components
Rev. 2.02 dated 31.05.2007 Page 9 of 30
2.1.3 Light-emitting diodes
Three light-emitting diodes (LEDs) on the front panel provide information about the current status
of the BK MIKRO LIN.B monitoring system (see chapter "Status Indication"):
Fig. 2-4: Control unit – Light-emitting diodes
yellow
Power supply / Status
Indication of supply voltage and status
red
"K.O." relay
Indication of fault message
green
"O.K." relay
Indication of no fault message
red/green
Error messages
Indication of illegal switch settings
o.k.
L1 N
AC IN
k.o.
LED
yellow
LED
red
LED
green
k.o.
o.k.
o.k.k.o.