
Last seen: Apr 29, 2025
@derek-m Testing Grundfos motors I have connected a Pulse generator to find out if one of my GRUNDFOS motors is working. I varied the Pulse width ...
@iancalderbank Hi Ian, Your system seems a lot more up to date than mine. My Grundfos motors still has LEDs .which do not show that the PWM sys...
@iancalderbank I know , Ian, I am confused myself......... So here is latest on the PWM sage......... My Grundfos motors work under PWM when fe...
@iancalderbank Hi Ian More revelations about the Grundfos PWM Motors! I have connected my oscillator (to the Brown(Sig) and blue(Ref)) wires an...
@iancalderbank Hi ian, In frustration I have connected a Wave generator only to discover that you are right. The Wiring shown in the manuals is w...
@dandee Many thanks ......again I am astonished with the information about the SIG and REF inputs............. specifically , How have you connec...
@iancalderbank Hi Ian. Following my trumpeting of my apparent success in correcting the losses in my heat pump I have to admit that the supposed ...
Hi Graham, Believe it or not but I agree with you ! Having looked over the last year at the poor , incompetent , support I have had from my "insta...
@william1066 THE PWMI have finally got a "hopefully working PWM Motor controlling the Motor Speed to control the Water Heat Power. The Critical p...
@mike-h PWM Signals producing E912 errors when Not in use! I have been recording the PWM Signals presented to my GRUNDFOSS MOTORS. When supplying ...
@mike-h World record for Hyper-Cycling! Have a look at my Hyper-Cycling SAMSUNG HEAT PUMP. I make it 94 cycles in one day! Can anyone ...
Sorry William, I found the PWM Flow rate on page 58 of my new manual. Many thanks also to Graham , the new version of the manual at 208 pages is inf...
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WC curve best discovered by experiment anyway as any lo...
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RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
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RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
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RE: Testing new controls/monitoring for Midea Clone ASHP
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RE: Midea ASHP – how to set weather compensation
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RE: Ya can’t win! It is S*d’s Law!
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RE: Electricity price predictions
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RE: Who’s Caved and Switched the Heating On Already?
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Ok. Two schools of thought. The first is to run the ...
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RE: Help me keep the faith with my air source heat pump installation
Er true, it should have read l/hr!
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RE: Is a Valliant Inline 6kW heater a BUS buster?
Much of that is true in principle, but its not likely t...
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
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RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
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