Rev. 1.748 Mellanox Technologies
The power supply status LEDs on the rear side of the system are located on the PSUs themselves.
Each PSU has one LED of its own.
4.2.1.4 UID LED
The UID LED is a debug feature, that the user can use to find a particular system within a cluster
by turning on the UID blue LED. This is a future feature that is not yet available.
4.2.1.5 Bad Port LED
The Bad Port LED indicator is used to indicate symbol errors in one or more system ports.
Table 18 shows the bad port status LED assignment.
Table 17 - Power Supply Unit Status Rear LED Assignments
LED Behavior Description Action Required
Solid green The PSU is running normally. N/A
Flashing green 1Hz AC present / Only 12VSB on (PSU off)
or PSU in Smart-on state.
Call your Mellanox representative
for assistance.
Amber AC cord unplugged or AC power lost
while the second power supply still has
AC input power.
Plug in the AC cord of the faulty
PSU
PS failure (including voltage out of
range and power cord disconnected).
Check voltage. If OK, call your
Mellanox representative for assis
-
tance.
Flashing amber Power supply warning events where the
power supply continues to operate; high
temp, high power, high current, slow
fan.
Call your Mellanox representative
for assistance.
Off No AC power to all power supplies. Call your Mellanox representative
for assistance.
Table 18 - Bad Port LED Assignments
LED Configuration Description Action Required
Off No symbol errors have been received in
last few seconds (normal condition)
N/A
Flashing amber Error, one or more ports have received
symbol errors.
Possible causes are:
• Bad cable
• Bad connection
• Bad connector
Check symbol error counters on the
system UI to identify the ports.
Replace the cable on these ports.
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