Possible causes
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Cause 1: One or multiple fans of the 3 fans are faulty. As a result, the remaining fans
need to rotate at full speed to cool down the EDFA.
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Cause 2: The EDFA temperature is excessively high, so the fans need to rotate at full
speed to cool down the EDFA.
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Cause 3: Hardware is faulty.
Procedure
3.4 Common Control Module Faults
3.4.1 The Device Fails to Communicate
Symptom
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Scenario 1: The device cannot communicate normally when setting up a connection.
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Scenario 2: The device cannot communicate normally during normal operation.
Possible causes and procedures
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In scenario 1:
EDFA0820-D
Routine Maintenance Guide
3 Common Troubleshooting
Issue 02 (2018-07-02)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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