Technical data

2 Power supply AC status LED
The following table describes the LEDs and their actions on the nonport side of the Extension Switch.
Nonport side LED patterns during normal operationTABLE 4
LED name LED color Status of hardware Recommended action
Power supply AC input
status (one green LED)
No light Power supply is not
receiving AC input voltage
or AC input voltage is
below operational limit.
Verify that the power
supply is properly seated
and the power cord is
connected to a functioning
AC power source.
Steady green AC input voltage is within
operational range.
No action required.
Power supply DC output
status (one bi-color LED)
Flashing amber (1:1) Output voltage is not
enabled.
Verify that the power
supply is fully seated and
that the captive screw is
secured.
Flashing amber/green (2:1) Over temperature warning. Verify that ambient
temperature is less than
40°C (104°F) and check for
intake airflow blockage.
Flashing amber/green (1:1) Internal fan is out of
regulation.
Replace the power supply.
Steady amber Power supply is faulty or
not plugged in completely.
Check the power cord,
current, voltage, and
temperature to determine
the problem.
Steady green DC output OK. No action required.
Fan assembly status (one
bi-color LED)
No light (LED is off) Fan assembly is not
receiving power.
Verify that the fan FRU is
seated correctly.
Steady green Fan assembly is operating
normally.
No action required.
Steady amber (for more
than 5 seconds)
Fan fault for one of the
following reasons:
• A fan assembly with
mismatched airflow is
present.
• One or more of the fans
in the fan assembly has
failed.
Try one of the following:
• Replace the
mismatched fan
assembly with one that
has the correct airflow
direction.
• Replace the faulty fan
assembly.
Operating the Switch
Brocade 7840 Extension Switch Hardware Reference Manual 35
53-1003127-02