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Troubleshooting
Table 20: Alarm Condition Summary
Alarm Type
Critical
Major
Info
LED Summary
The sections describe the meanings of the LEDs.
Power Supply LEDs
The table below summarizes the power supply LEDs for both the AC and DC power supplies.
Table 21: PSU LED Indication
Power LED
Green
Yellow 1Hz blinking
Off
Green 1Hz blinking
Yellow
Off
Alarm Meaning
Port in down state.
Environmental sensor threshold exceeded critical
level (voltage, temperature)
Environmental sensor threshold exceeded major level
(voltage, temperature)
Port administratively shut down.
FAIL LED
Off
Red 1Hz blinking
On
Off
Off
Off
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
LED Summary
Power Supply Condition
Power Supply ON; valid
input/output
PSU Warning due to OCP, OTP,
UV, OV, OP, abnormal fan
operation
PSU continues to operate
PSU failure due to OCP, OTP, UV,
OV, OP, abnormal fan operation.
No valid output.
Valid power present, shutdown by
system.
Input voltage low
No valid power input.
103
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