Siemens S5-155U System Manual page 121

System Manual
C79000-B8576-C199-03
Requirement:
Redundant backup, "Spare power supply" with rechargeable battery.
The lithium battery in the rack in in full working order.
Step Action
1 Disconnect the faulty power supply from the system
voltage and remove it.
2 Set the jumpers on the spare power supply according to
your needs.
3 Push the spare power supply into the rack and screw it in
place.
4 Remove the right-hand fan subassembly from the spare
power supply.
5 Connect up the replacement power supply.
6 Switch on the system voltage and the power supply in any
order.
Reaction:
- The system runs up
- Both fans run at an increased speed
- The LEDs "Fan 3" and "RB low" light up.
7 Reinsert the right-hand fan subassembly.
8 After the system has run up, press the reset switch on the
spare power supply.
Reaction:
- The LED "Fan 3" goes out
- The fans run at their normal speed again
- The LED "RB low" shows the battery charge state.
Requirement:
No backup
Step Action
1 Disconnect the faulty power supply from the system
voltage and remove it.
2 Set the jumpers on the spare power supply according to
your needs.
3 Push the spare power supply into the rack and screw it in
place.
4 Connect up the spare power supply.
5 Switch on the system voltage and the power supply in any
order.
Reaction:
- The system runs up.
Power Supply Units
4 - 51
4