Siemens S5-135U/155U - Manual (Page 103)

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System Manual
C79000-G8576-C199-06
Other faults can be indicated by the green LEDs on the front plate going off.
LEDs Possible Cause Action
Green LEDs go off
and the power
l f il
The Enable jumper is
out of place Check the jumper.
supply fails.
Latching Off-switching
by overvoltage at
output Switch the supply voltage off and on
again. If this does not clear the fault,
there is an internal fault.
Internal fault in the
PSU Send in the PSU for repair.
Base load too low Increase the base load
Other Faults
Central Controllers and Expansion Units Power Supply Units