Calling all rotary pump experts!
My ECM Technika started making some buzzy rattly sounds of late, during operation of the rotary pump -- both during extraction, and during boiler refill.
I opened 'er up and checked for random loose parts and pipes that might be vibrating, but found nothing loose. Holding/damping components didn't help. I also checked and readjusted the pump bypass and the OPV for any looseness, but that didn't help either.
During all the tinkering, the repeated stop/start operation of the pump seems to have helped to reduce the buzzing quite a lot. For now the buzzing has been reduced to just a fraction of a second during pump start, like this:
https://imgur.com/a/FAG9Jvw
So this is OK and I can live with it ... but I suspect the noise will worsen back to how it was.
What is the collective snob wisdom please - dodgy pump, pump motor, or something elsewhere?
Thanks!
My ECM Technika started making some buzzy rattly sounds of late, during operation of the rotary pump -- both during extraction, and during boiler refill.
I opened 'er up and checked for random loose parts and pipes that might be vibrating, but found nothing loose. Holding/damping components didn't help. I also checked and readjusted the pump bypass and the OPV for any looseness, but that didn't help either.
During all the tinkering, the repeated stop/start operation of the pump seems to have helped to reduce the buzzing quite a lot. For now the buzzing has been reduced to just a fraction of a second during pump start, like this:
https://imgur.com/a/FAG9Jvw
So this is OK and I can live with it ... but I suspect the noise will worsen back to how it was.
What is the collective snob wisdom please - dodgy pump, pump motor, or something elsewhere?
Thanks!





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