I search a bit but I don't know exactly what is PWC and as you said it's broken but according to Google PWC and Bitfury are partners to create blockchain accelerators.
So what exactly you are trying to point out?
Did you try to contact Bitfury support? You can contact them through email support here
support@bitfury.comI suggest you if you can copy the logs paste them here I will try to analyze the issue.
Also, would like to suggest you try to upgrade the firmware you can download the firmware from this link below including the manual on how to flash it through an SD card.
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https://bitfury.com/crypto-infrastructure/supportYou can also check this support thread below about Bitfury
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https://bitcointalk.org/index.php?topic=287590.0
