11 PREVENTIVE AND CORRECTIVE MAINTENANCE
3BHS213401 E01 REV H ACS1000 AIR-COOLED USER MANUAL 159/184
11.5 LEDs and switches on circuit boards
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 with the auxiliary voltage switched on and without having to remove covers first. The
LEDs provide information on the status of the devices and can be used for
diagnostic purposes.
11.5.1 AMC circuit board
Figure 11-2: AMC circuit board
LED Color Description
Status when software
has loaded
Status when software
has not loaded
Booting ON Booting ON
F Red Fault ON OFF ON ON
R Green Run OFF OFF OFF OFF
M Green 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
F
M
T1
S3
S2
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