User`s guide

Table 5–1 lists the EMU front panel buttons and LEDs, their functions and error
descriptions.
Table 5–1 EMU Front Panel LEDS/Switches and Error Descriptions
When the ... Is The System ...
System OK (green) LED ON Is in the normal operating state.
Shelf Fault (amber) LED OFF
Blower 1 through 8 (amber) LEDs OFF
Temperature (amber) LEDS OFF
Audible Alarm OFF
Audible Alarm ON Has a failed FRU.
Check the EMU control panel LEDS to determine
which FRU has failed.
System OK (green) LED OFF Has a failed FRU and one or more of the following
error conditions exist:
– The temperature is above the maximum safe
operating level.
– The +12 V dc power supply output is out of
regulation.
– The +5 V dc power supply output is out of
regulation.
– Fewer than four power supply SBBs are
operational
– One controller may be defective. Check for any
error messages on the terminal (if one is attached).
Blower x LED ON Has an individual blower x failure.
Blower 1, 2, 3, and 4 (amber) LEDs ON Has one of these four blowers either not installed or
not connected.
Blower 5, 6, 7, and 8 (amber) LEDS ON Has one of these four blowers either not installed or
not connected.
Temperature (amber) LED ON Operating temperature is too high. The blowers will
operate at high speed to reduce the temperature.
Shelf Fault (amber) LED ON Has one or more of the following faults:
– A power supply SBB has failed. (Verify whether
any individual power supply SBBs are off to
confirm.)
– A storage device SBB or one of the controllers
has failed. (Refer to the controller OCP LED codes
tables in this chapter.)
– Fewer than four power supply SBBs are
operational.
5–26 Controller Operations