3Com S7906E Getting Started Manual page 142

Case
The power module is
over-temperature protected.
The fan tray is faulty.
After the power supply is cut off, it takes a short while for the power LED to go off. This is normal.
On the SRPUs, there are also LEDs indicating the working status of the power modules. For details,
refer to related description about the power LEDs on the SRPUs other than the LSQ1MPUA0 in
Chapter 1 "Product Overview".
Troubleshooting PSR1400-D
The power module PSR1400-D has four LEDs, which indicate the input and output statuses of the
power module and the working statuses of the power module fan and the PoE power supply,
respectively.
Table 7-2 Description of LEDs on the PSR1400-D
Case
The power module is
connected but the SYSTEM
power switch is turned off.
The power module is
connected and the SYSTEM
power switch is turned on, but
the PoE switch is turned off.
The power module is
connected, and the SYSTEM
power switch and PoE switch
are turned on.
LED Color
INPUT Green
OUTPUT Red
FAN Green
INPUT Green
OUTPUT Green
FAN Red
LED Color
INPUT OFF
OUTPUT OFF
FAN OFF
PoE OFF
INPUT Green
OUTPUT Green
FAN Green
PoE OFF
INPUT Green
OUTPUT Green
FAN Green
PoE Green
7-3
Status
The power input is normal.
The power module goes into the
self-protection state.
The power module fan works normally.
The power input is normal.
The power output is normal.
The power module fan is faulty.
Status
The power input is normal.
No power is output.
A fan does not rotate.
No PoE is output.
The power input is normal.
The power output is normal.
The power module fan works normally.
No PoE is output.
The power input is normal.
The power output is normal.
The power module fan works normally.
PoE is output.