Controls
The control panel contains the following controls and displays (please refer to the numbers
in the figure):
1. UNIT EMERGENCY switch
The UNIT EMERGENCY switch switches the SU /390 off.
2. POWER ON button with lamp
Switches the Server Unit on. When the SU /390 is switched on, POWER ON lights up
green.
3. STAND-BY button
Switches the SU /390 off, but not currentless (power supply units in standby mode).
4. SYSTEM lamp
Displays whether the CPUs of the SU /390 are active.
5. CHECK lamp
Shows whether a fault has occurred.
6. STATUS indicator
Supplies detailed information on the hardware status.
The function of the displays and controls in the operating panel is described in the sections
below.
U41858-J-Z126-1-76
Control panel (on the SE700 and SE500)
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