Power Supply Modules
(Cat. No. 1771P4R and P6R)
Installation Data
9
Your power supply has two indicators located in the upper half of the
module front panel.
The top indicator is yellow and is labeled NON REDUNDANT SYSTEM.
This indicator tells you that the number of supplies in operation is below
the number required for redundant operation. The yellow indicators in a
redundant system operate together; they are either all on or all off.
The lower indicator is green and is labeled P/S ACTIVE. Table D shows
how to interpret the P/S ACTIVE indicator.
Table D
Interpreting the P/S ACTIVE Indicator
If the Indicator is:
Then:
On
This power supply is operating normally and a sufficient number of
power supplies is operational for the system configuration.
Off
The supply has detected one of the following conditions:
G
dc overvoltage (the supply shuts down)
G
dc undervoltage (the supply shuts down)
G
dc overcurrent (the supply shuts down)
G
power switch turned off (the supply is turned off)
G
ac undervoltage
G
insufficient number of operational power supplies for the system
configuration
When the P/S ACTIVE indicator is off because of an ac
undervoltage or because an insufficient number of supplies is
operational, the power supply may continue to deliver output power.
When you troubleshoot your power supplies, you may be required to
remove and replace the power supply while power is still applied to the
chassis. The following procedures describe the correct way to remove and
insert your power supplies.
Interpreting the Power Supply
Indicators
Troubleshooting Your Power
Supplies