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Installation Manual
H3C S9500 Series Routing Switches
5.1.2 Troubleshooting the PSU
Table 5-1 Description of the LEDs on PSU
LED
Input
Output
FAIL
The following are PSU faults that may occur and the methods used for troubleshooting.
The Input LED (green) and Output LED (green) stay ON, but the display power
command shows that the PSU is not in position (but the other PSU operates
normally). Such a problem is likely caused because of the poor contact between
the PSU and the backplane due to a badly seated PSU. In this case, switch off the
power supply, loosen the captive screws on the PSU, push the PSU into the
chassis a little bit, tighten the captive screws, and switch on the power supply to
check that the normal state is resumed.
The Input LED (green) and Output LED (green) are OFF. In this case, check that
the power cords are connected correctly, the power cords are in good condition,
and the power switch has been put in the ON position.
The Fail LED (red) is ON. In this case, check that the correct power voltage is in
use (i.e., 90 to 264 VAC, 50-60 Hz for AC PSU, and -36 to -72 VDC for DC PSU).
The Fail LED (red) is ON. In this case, check that the air filter protecting the fan
tray is clean. Excessive dust accumulated on the air filter will block the fan tray
from free ventilation and even lead to power supply failure.
Note:
If you cannot solve the problem after going through the above checking steps, contact
H3C technical support.
5.1.3 Troubleshooting the Fan Tray(s)
The S9500 series provide two LEDs on the fan tray. You can read them and know
whether the fans are normal.
Status
Power input is normal, and the power switch is in
Steady ON
the ON shift.
Power input is not normal or power input is not
OFF
available.
Steady ON
The output of the PSU is normal.
OFF
The output of the PSU is not normal.
Steady ON
The PSU is faulty.
OFF
The PSU works properly.
5-2
Chapter 5 Switch Monitoring and Maintenance
Meaning
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