Troubleshooting Power Supply Units
LED
Name
LED Colors Potential Cause Solution for Troubleshooting
P Red An overload of circa 110% is reached. A hardware error has occurred. Replace
the PSU as described in “Replacing a
PSU/7HU-R-DC or PSU/7HU-R-DC-HP”
on p.716 and return the PSU to ADVA
Optical Networking.
This unit is not receiving DC power,
but the redundant power supply unit
provides power to the shelf.
Yellow The maximum output current has
been reached or exceeded.
Check the power connection according to
the PSU specification.
Off DC power source has failed or the
polarity for connecting the power cord
has not been considered. No power is
provided to the shelf.
1 Check the power connection. If power
connection is OK, a hardware error
has occurred.
2 Replace the PSU as described in
“Replacing a PSU/7HU-R-DC or
PSU/7HU-R-DC-HP” on p.716 and
return the PSU to ADVA Optical
Networking.
If the polarity for connecting the power
cord has not been considered, connect the
power supply to a system safety ground
lead.
Green The unit is receiving DC power. No action is required.
The output voltage is in the
admissible range.
Table 18: LED Status of the PSU/7HU-R-DC(-HP)
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 93
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