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3com S7906E Guide D’Installation Rapide

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7-3 
Case 
LED 
Color 
Status 
INPUT  
Green 
The power input is normal. 
OUTPUT  
Red 
The power module goes into the 
self-protection state. 
The power module is 
over-temperature protected. 
FAN  
Green 
The power module fan works normally.
INPUT  
Green 
The power input is normal. 
OUTPUT  
Green 
The power output is normal. 
The fan tray is faulty. 
FAN  
Red 
The power module fan 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 
LED 
Color 
Status 
INPUT  
OFF 
The power input is normal. 
OUTPUT  
OFF 
No power is output. 
FAN  
OFF 
A fan does not rotate. 
The power module is 
connected but the SYSTEM 
power switch is turned off. 
PoE 
OFF 
No PoE is output. 
INPUT 
Green 
The power input is normal. 
OUTPUT 
Green 
The power output is normal. 
FAN 
Green 
The power module fan works normally.
The power module is 
connected and the SYSTEM 
power switch is turned on, but 
the PoE switch is turned off. 
PoE 
OFF 
No PoE is output. 
INPUT 
Green 
The power input is normal. 
OUTPUT 
Green 
The power output is normal. 
FAN 
Green 
The power module fan works normally.
The power module is 
connected, and the SYSTEM 
power switch and PoE switch 
are turned on. 
PoE 
Green 
PoE is output.