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FAN_FAIL alarms because of different power consumption types in the FAN boards

Publication Date:  2012-07-25 Views:  37 Downloads:  0
Issue Description
Huawei engineer was installing a new OSN 3500 with V1R8 version; however, after the equipments were running the FAN_FAIL alarm was reported over one 
of the FAN boards.
Alarm Information
FAN_FAIL
Handling Process
Huawei engineer change the 19W, BOM code is 02120308(OSN 7500) FAN by 16W, BOM code is 02120173 (OSN 3500) FAN and the alarm disappear.
Root Cause
There was inserted in the OSN 3500 one FAN from OSN 7500. 
 FAN of OSN3500 and OSN7500 are different, and can not be used mixed because of the different Power Consumption
FAN is for OSN3500, and the Power Consumption is 16W, BOM code is 02120173
FANA is for OSN7500, and the Power Consumption is 19W, BOM code is 02120308.
Suggestions
When a new equipment installation the Bom from all the boards must be checked, even it seems that be very similar between different equipments.

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