One of the things that I hate the most about building and managing Data Centre is the fact that all maintenance on critical infrastructure has to be carried out at ungodly hours. Ally this to the fact that Uninterruptable Power Supplies (UPS) have factory recommended component swap-outs, whether or not the component, usually capacitors are broken or not.
It is an ass covering exercise all round. If they state five years and you don’t follow the recommendations they may last ten years plus, however if one or more of them go pop (usually with catastrophic consequences) then you get the old “Well we did warn you ” routine.Last nights exercise included replacing the DC Capacitor banks on 2 x 200kVA machines. As they are A and B devices I could only do one at a time and it takes 90 minutes each. Throw in another 45 minutes per machine to carry out routine maintenance, and multiply that by 8 and as we had to start at 21:00 it made for a long night.
Good news was that we managed to finish the tasks one hour early, maintain the client load and put everything back where it came from (hopefully)
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