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The OptiX Metro 1000 Fails to Be Started Because the Power Consumption of the Power Supply Is Insufficient

Publication Date:  2012-07-25 Views:  51 Downloads:  0
Issue Description
The OptiX Metro 1000 V2 is powered off but fails to be restarted normally. All the indicators on the SCC board are on, and the logging in to the OptiX Metro 1000 V2 through the command line fails.
Alarm Information
The OptiX Metro 1000 V2 is not started, and it is impossible to log in to the OptiX Metro 1000 V2 to query alarms.
Handling Process

1. Check the SCC board on the site, and find that all the indicators are constantly on. The SCC board is not started. Therefore, it is impossible to log in to the OptiX Metro 1000 through the command line. Power off and restart the OptiX Metro 1000. The fault persists.

2. Replace the SCC board and restart the OptiX Metro 1000. The fault persists.

3. Replace the OptiX Metro 1000 (including the tray assembly and all boards), and then restart the new OptiX Metro 1000. The fault persists.

4. After the preceding operations, it can be inferred that the fault is not caused by the OptiX Metro 1000. Observe the input power supply and grounding of the OptiX Metro 1000. It is found that the input power supply is provided by the base station device of A and the connection does not comply with the specifications. The tested input voltage is -53.5 V, which is normal.

5. It is inferred that the power consumption of the power supply may be insufficient. Remove all the service boards except the SCC board, and power off and restart the OptiX Metro 1000. The OptiX Metro 1000 is normally started. Insert the service boards one by one, and the OptiX Metro 1000 runs properly.

6. Power off and restart the OptiX Metro 1000 (with all service boards inserted) on the site. The fault occurs again. Connect the power supply to the -48 V DC distribution rack, and then power off and restart the OptiX Metro 1000. The OptiX Metro 1000 is normally started.
The power consumption during device restart is higher than that during device running. With full configuration, the power consumption of the OptiX Metro 1000 is 102.5 W and the current is 3.7 A. To ensure that the OptiX Metro 1000 can be normally started, Huawei recommends that the current of the fuse should be 6 A (1.5 to 2 times of the current during normal running). The power consumption provided by the base station of A is the power consumption threshold for normal device running and can only ensure that all the devices can run properly. After power-off, however, the OptiX Metro 1000 cannot be restarted normally due to insufficient power consumption. 
 
Root Cause

l          The SCC board is faulty.

l          A service board is faulty.

l          The tray assembly of the OptiX Metro 1000 is faulty.

Other faults occur. 
Suggestions
During daily troubleshooting, after determining that the fault is not caused by the device itself, focus on checking the external environment, especially the input power supply and grounding.

END