CHAPTER 10 – PREVENTIVE AND CORRECTIVE MAINTENANCE 160
10.5 LEDs and switches on printed
circuit boards and I/O devices
The following section provides an overview on the meaning of LEDs
and switches of the main circuit boards and I/O devices.
The LEDs presented in the following section can be
checked easily while the auxiliary voltage is
switched on without having to remove covers first.
The LEDs provide information on the status of the
devices and can be used for diagnostic purposes.
10.5.1 AMC circuit board
The LEDS of the AMC board are identified in 10-3.
10-3
LED Color Meaning Status when SW loaded Status when SW not loaded
Booting ON Booting ON
FRed Fault ON OFF ON ON
R Green Run OFF OFF OFF OFF
MGreen ON OFF ON ON
P Green Supply OK ON ON ON ON
T1 Yellow Receiving data on DDCS channel 0 Flashing ON / OFF Flashing ON / OFF
T2 Yellow Receiving data on DDCS channel 3 Flashing ON / OFF Flashing ON / OFF
S3 Yellow OFF OFF OFF OFF
S1 Yellow Flashing* OFF Flashing* OFF
S2 Yellow Flashing* OFF Flashing* OFF
S0 Yellow Flashing* OFF Flashing* OFF
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