U41169-J-Z156-4-74
29
Operating and Indicator Elements
ON/OFF Switch
Power Supply Unit with three LEDs:
Figure 7: The Power Supply Unit with three LEDs
(1)
Fault indication (red LED)
(2)
Pre-failure indication (yellow LED)
(3)
Operating indication (green LED)
Fault
indication
(red LED)
Pre-failure
indication
(yellow LED)
Operating
indication
(green LED)
Status of the power supply unit
OFF
OFF
OFF
No AC voltage present.
OFF
OFF
flashing
AC voltage present; standby
outputs ready.
OFF
OFF
ON
DC outputs ready. Power supply
unit operational.
ON
OFF
OFF
No AC voltage present for this
power supply unit or power supply
unit has failed.
flashing
OFF
ON
Current limiting.
OFF
flashing
OFF
Pre-failure. The LED indicates that
the fan speed falls under a speed
of 810 rpm and the fan will fail
soon.
Table 7: Meaning of the Power Supply Unit LEDs
1 2 3