foxylad

Hi Dr Spa. I have Now fitted a brand new pcb although I have not plugged the pumps etc into it for fear of blowing it. the new pcb still puts out 240v to both the low and high speed of pump1, .???? I dont want to plug everything in to find I have blown the pcb. A little more testing today I have unplugged everything including the heater from the pcb apart from the suplly in. still 240v to low and high speed on power up??? Some reading has said that nothing should be powered up until buttons are pressed.(surely not right). Maybe this is a safety feature as it thinks the spa is too hot or too cold..... Which leads me to test the m7 sensors which both show 0.04 ohms??? again surely not right but Unsure of ohm testing with the meter??? also with the sensors unplugged I still get 240v to the 2 speeds of the pump. I have checked all the cable for any shorts etc. cleaned all connections as precaution and yet Im still no further. Please please help me sort this as its becoming a very expensive pond

Hello. I have recently bought a used spaform milano with one seized pump. after installation I have fitted two brand new pumps. One to replace the seized pump and the second to replace the 2 speed that was tripping the rcd. However it sttill trips the rcd with the new pump plugged in. I have limited skills but I have tested the output on the control unit and it seems i have 240v supplied to both the high and low speed when the hot tub is powered. With the said pump disconected it seems everything else works ok. blower fires up with 2 speeds and the jet 2nd pump also circulates. I also beleive that the heater is ok as I have checked the resistance and that shows around 19ohm. More to do with the pcb me thinks,,,,, Upon removal I found that the relay that supplies the low speed to be charred the pcb and had a closed circuit.??? ok so on the pcb I found there to be a spare relay(Perimeter light ((not Used)) that I removed from the pcb and soldered in place of the low speed. thinking that I had solved I then reassembled the pcb within the unit and again has tripped the rcd.. Pcb removed again to find that it has also blown the replaced relay. I understand that I will have to invest yet another £500 or so to replace the pcb If I cannot get this one working. Im seeking advise on the repair of the pcb or replacement of control unit and panel with a cheaper option. Any help is more than welcomed and my kindest regards come forth to your response