Siemens CU240S DP Operations Instructions Page 101

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Control Units CU240S
Operating Instructions (Compact), 04/2006, A5E00766042B AA
5-1
Troubleshooting/FAQs
5
Status display via LED
The SINAMICS G120 inverters provide multiple functions and operating states which are
indicated via LED.
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Figure 5-1 State LED on the CU240S, CU240S DP, CU240S DP-F
Colours
The colours of the LEDs are self explanatory. The Status of the inverter is displayed by the
following different LED colors and states:
State Meaning Color
on off Temporary state
(flashing 0.5 Hz)
Fault indication LED
SF
BF
Red
Ready LED
RDY
Green
Fail-safe LED
ES
STO, SS1, SLS
Yellow
If for a certain state it is indifferent whether the LED is ON, OFF or flashing it is mentioned as
"not relevant".
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