Siemens S5-135U/155U System Manual page 109

Releasing the Fan
The following figure shows how to release the fan lock:
Lock
SIEMENS
Unlock
fan
After Replacement
After replacement, press the Reset button, the monitor will become active 6
secs after the Reset button is pressed.
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,
System Manual
C79000-G8576-C199-06
Central Controllers and Expansion Units Power Supply Units
Unlock
fan
IF...
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.
Batt.3,6V/5Ah
Use battery holder
C98100-A1155-B21
only!
Replace by
Unlockfan Unlockfan
trained personnel
only!
THEN...
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