This key is used to switch off the power supply of the entire /390 system. It is switched off independently of an automatic power-on/off function.
CAUTION!
There is a risk of data loss. When standby mode is switched to (using the key or the SVP frame), it is not guaranteed that system data can be written back. Terminate applications which are running beforehand and shut down the operating system.
IMPORTANT!
In standby mode some of the circuits remain live!
Press the STAND-BY key to initiate system power-off. The power-off sequence begins. While the system is powering off, the status indicator displays a sequence from 501 through 599. When the Server Unit is switched off, POWER ON flashes and the status indicator display is empty.
Instead of using the key, the system can also be switched to standby using the SVP frame (AU4) POWER STAND-BY/IMPL. See the "Server Unit /390" Operating Manual [2].