Note
To complement these operating instructions, the List Manual contains an overview of all
parameters as well as a selection of function diagrams to describe the operating principle.
8.2
Fault and system messages
8.2.1
Diagnostics
8.2.1.1
Diagnostics via LEDs
LEDs of the Power Stack Adapters
Table 8-1
LEDs of the Power Stack Adapters
LED
Color
Status
Description; cause
Remedy
PWR
-
Off
24 V power supply has failed or is too low
(< 14 V) or internal fuse defective.
Check input voltage.
If input voltage is > 18 V and LED off:
Return component for repair.
Red
Continuous
light
24 V power supply is available (>14 V);
internal board voltage fault.
Check input voltage.
If input voltage is > 18 V and LED red:
Return component for repair.
Green
Continuous
light
24 V power supply OK.
Internal board voltages OK.
--
Operation
8.2 Fault and system messages
SINAMICS SL150 6SL38655UM427AA02
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Operating Instructions Rev.201910281507 EXAMPLE