关于DMX-4 Environmental Error: Power Supply B faulted问题

最近单位DMX-4陆续报Environmental Error: Power Supply B faulted，如下：

Detection time           Dir    Src  Category      Severity     Error Num

------------------------ ------ ---- ------------- ------------ ----------

Mon Feb  6 23:30:55 2017 DF-2B  SP   Environment   Error        0x006a

    Environmental Error: Power Supply B faulted

Wed Feb  8 05:04:33 2017 DF-2B  SP   Environment   Error        0x006a

    Environmental Error: Power Supply B faulted

Wed Feb  8 05:05:55 2017 DF-15B SP   Environment   Error        0x006a

    Environmental Error: Power Supply B faulted

environmental工具检查均正常，网上知可能是电源间歇性故障，但故障信息中只提示DF-2B/15B，未显示B0 or B1，且storage bay 1A后还串有storage bay 2A、3A，所以无法准确定位是哪个DAE的Power Supply B，向各位前辈请教，有没有命令或者方法能判断出准确故障点，感谢！

具体loop如下：

storage bay 1A

DA2-B0 LCC A "PRI" DAE 10 LCC B "PRI" DA15-B0

DA2-B0 LCC A "PRI" DAE 10 LCC B "PRI" DA15-B0

1A, 10 LCC A  2A, 10 LCC A  2A, 10 LCC A   3A, 10 LCC A

"EXP"         "PRI"         "EXP"          "PRI"      

1A, 10 LCC B  2A, 10 LCC B  2A, 10 LCC B   3A, 10 LCC B

"EXP"         "PRI"         "EXP"          "PRI"      

storage bay 1B

DA2-B1 LCC A "PRI" DAE 14 LCC B "PRI" DA15-B1

DA2-B1 LCC A "PRI" DAE 14 LCC B "PRI" DA15-B1

1B, 14 LCC A  2B, 14 LCC A

"EXP"         "PRI"      

1B, 14 LCC B  2B, 14 LCC B

"EXP"         "PRI"