Maintenance And Troubleshooting; Power Module Failure; Fixed Power Module Failure Of Qx-S5524Gt-4X2Q Or Qx-S5548Gt-4X2Q - NEC QX-S5500G Series Installation Manual

Installation Guide
QX-S5500G Series Ethernet Switches

7. Maintenance and troubleshooting

7.1 Power module failure

7.1.1 Fixed power module failure of QX-S5524GT-4X2Q or QX-S5548GT-4X2Q

The QX-S5524GT-4X2Q or QX-S5548GT-4X2Q switches use fixed power modules, and
support three power input modes: AC input, RPS DC input, and concurrent AC and RPS
DC inputs.
Look at the system status LED and the RPS status LED of the switch to identify power
system failure.
LED
System status LED
RPS status LED
I. AC input
Symptom

The system status LED is off.
Solution

To resolve the problem:
a) Verify that the AC power cord is securely connected to the switch, and the AC-input
power receptacle on the switch and the connected AC power outlet are in good
condition.
b) Verify that the external AC power system is operating correctly.
Table 7-1 Description for the power failure indication LEDs
Mark Status
SYS OFF The switch is powered off.
The AC input is normal, and the RPS is in position or operating
Steady green
correctly.
RPS RPS power input is normal, but AC input has failed or AC input is not
Steady yellow
connected.
OFF No RPS is connected.
7-1
7. Maintenance and troubleshooting
Description