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A customer who lives in a large stately home near me dropped in 3 vacuum cleaners for repair, including 2 Miele machines, model numbers S5261 and S512. The S5261 (Cat & Dog) was sparking badly and evidently needs a new motor. I don’t think these motors can be dismantled to check the brushes. The S512 was dead apart from a red indicator light that came on a couple of seconds after switching on. The construction of these machines makes them difficult to check over with a meter because sections are plugged together and as you dismantle the machine the sections become unplugged. I therefore thought the easiest thing to try was fitting the S512 motor into the S5261, hopefully making one good machine out of the 2. I did this and tried it but it tripped the sockets MCB. I then fitted the S5261 motor in the S512 and tried that. This also tripped the MCB. I tried doing a PAT test and both machines passed.
Both motors had the same 4 way socket connections but had different numbers on them. I think the S5261 has a 2200 watt motor whereas the S512 is 2000 watt. I’m wondering if the different motors are wired differently internally. Perhaps I’ve ended up with mains directly between the 2 brushes in both cases? 😕
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