A: Not sure what you mean by the chips but if the pumps are not switching on would suggest you check the inlet filters, if they are okthen you may have to replace the pcb and reed switches. If you click on the link below it will take you to an exploded diagram and allow online ordering of any parts required.
http://www.showerdoc.com/shower-spares/aqualisa/AQUAL-PARENT-38-Aqualisa-Mach-PumpAlastair
Answered 94 days ago | Alastair