Troubleshooting Power Supply Units
PSU/7HU-DC, PSU/7HU-DC-HP, PSU/7HU-DC-800,
PSU/X9HU-DC-800, and PSU/9HU-DC
The PSU/7HU-DC is available in these variants:
• PSU/7HU-DC
• PSU/7HU-DC-HP
• PSU/7HU-DC-800
PSU/7HU-DC, PSU/7HU-DC-HP, PSU/7HU-DC-800, PSU/X9HU-DC-800, and PSU/9HU-DC units have a
single tri-color LED indicator marked “P”. The LED is located on the faceplate of each PSU.
Please follow the troubleshooting steps in Table 17 based upon the states of the LEDs.
Note
If your module has an LED status that is not represented in Table 17, please contact your ADVA
Optical Networking Technical Services Representative.
When connecting dual DC power sources, both sources must be the same polarity. Opposite-polarity
sources will damage the unit.
WARNING
Hazardous voltage! Always disconnect the DC power cord from the terminal block before
removing the PSU from the shelf.
LED
Name
LED
Colors
Potential Cause Solution for Troubleshooting
P Red An overload of circa 110% is
reached.
A hardware error has occurred. 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.
1 Check the power connection and ensure
the power feed is operational.
2 If the issue persists, a hardware error has
occurred. Return the PSU to ADVA
Optical Networking.
Yellow The maximum output current has
been reached or exceeded.
Check the power connection according to the
PSU specification.
Table 17: LED Status of the PSU/7HU-DC, PSU/7HU-DC-HP, PSU/7HU-DC-800, PSU/X9HU-DC-800,
and PSU/9HU-DC
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 91
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