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Table 11. CR4S-8 blade LED descriptions
LED purpose Color Status
Recommended
Action
Power Steady green CR4S-8 blade is on. No action required.
No light (LED is off) CR4S-8 blade is not
on.
Ensure blade is
firmly seated and has
power.
Status No light (LED is off) CR4S-8 is either
healthy or does not
have power.
Verify that the power
LED is on.
Steady amber CR4S-8 blade is
faulty or the switch
is still booting.
Ensure that the blade
is firmly seated and
the switch has
completed booting. If
the LED remains
amber, contact IBM..
Slow-flashing amber
(on 2 seconds; then
off 2 seconds)
CR4S-8 blade is not
seated correctly or is
faulty.
Pull the blade out
and reset it. If the
LED continues to
flash, replace the
blade.
Fast-flashing amber
(on 1/2 second; then
off 1/2 second)
Environmental range
exceeded.
Check for
out-of-bounds
environmental
condition and correct
it.
LINK LED No light (LED is off) No ICL or ICL cable
present, but no
connection.
Ensure that the ICL
cable is correctly
installed.
Steady green ICL connected No action required.
ATTN LED No light (LED is off) ICL is operational No action required.
Blinking amber Attention required Ensure that the ICL
cable is correctly
installed.
Power supply status
To determine the status of a power supply:
1. Check the LED indicator on the power supply (see Figure 28 on page 57). The
LED patterns may temporarily change during POST and other diagnostic tests;
for information about how to interpret the LED patterns, see Table 12 on page
57.
2. Check the power supply status by entering psShow.
The power supply status displays OK, Absent,orFaulty. If a power supply is
absent or faulty, contact IBM.
56 SAN384B Installation, Service, and User Guide