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Potterton Suprima 60 fault. PCB or pump?

My Potterton Suprima 60 has been locking out. The PCB seems to be the most likely fault.I have also noticed that since the lock-outs I have heard loud banging in the CH pipes a couple of times. Is this just a product of the PCB fault or could it be the pump that is faulty and making the PCB lock out?
Can anyone help with an answer please before I go and buy a new PCB? Thanks in advance.

Sean
October 2007
PottertonHeating, Home Heating SystemsFault Pcb Noticed
Dean was absolutely correct in his diagnosis. Bought a recon PCB from adlink £35 and it worked fine afte that.

Thanks Dean.

sean
February 2008
Im a gas engineer and just attended same fault as youve had on a potterton suprima 60
keeps going to lockout and pump is ok
Pump wont run cos pcb is not sending power to pump
my diagnosis is that the pcb is faulty
I will have to change pcb in one I am fixing

Dean
November 2007
I am not a plumber but had so many Suprima lockouts that I took the PCB out and resoldered all the joints that looked dodgy. Since then, 2 years ago, no problems.

Barry Abel
November 2007
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