Siemens S5-155U System Manual page 116

Power Supply Units
Releasing the fan lock
SIEMENS
Unlock
fan
After replacement
4 - 46
The following figure shows how to release the fan lock:
Unlock
fan
After replacement, press the Reset button, the monitor will become
active 6 secs after the Reset button is pressed.
IF...
the relevant "Fan" LED goes
off,
the relevant "Fan" LED does
not go off,
the relevant "Fan" LED goes
off but the "Warning" relay
does not pick up,
Batt. 3,6V/5Ah
Use battery holder
C98100-A1155-B21
only!
Unlock
fan
Replace by
trained personnel
only!
THEN...
the fan is correctly installed.
the fan is incorrectly installed. Make
a step-by-step check to ensure
correct replacement.
another fan has failed and another
"Fan" LED lights up. Replace the
second fan also.
System Manual
C79000-B8576-C199-03