Switching On The Power Supply Unit For The First Time - Siemens S5-155U System Manual

Power Supply Units
Switching on the power
supply unit for the first time
How to switch on the power
supply unit
4 - 38
When you have made all the settings, switch the power supply unit on
as follows
Step Action
1 Switch the power
supply unit on with the
Power switch.
2 Switch the system
voltage on.
Result
If the required basic load (see
Section 4.5.6, Technical
Specifications) is in circuit, the
power supply unit will start.
The green LEDs "5V o.k."
"15V o.k."
"24V o.k." light up.
The fans run.
System Manual
C79000-B8576-C199-03