I am stuck on a customer's shower, it's a 10 year-old Aqualisa Quartz pumped. It has the old style grey processor unit.
Customer complained of shower flow not stopping completely when switched off (dribbling constantly), in all other ways it worked perfectly well.
I stripped down the mixer mechanism, and found the two spring loaded seals on the two inlets were stuck back. Great, that would explain the dribbling. I freed them off, cleaned, and lubricated their guides with a smear of silicone grease. I was careful not to trap any internal wires on reassembly of the processor.
On reassembly I noticed that the data cable was damaged near to its plug end. I inspected it but the damage did not seem to be significant....for your information the blue wire had been crushed, presumably at the installation 10 years ago.
The new symptoms are that the temperature stepper motor will drive the control disc valve forwards on switch on (from the normal shower user control button), then it will reverse to the 'stop' position and the pump will not start. Strangely the user control button ('start/stop') remains illuminated, and no further action can be taken until the mains supply is cycled off-on.
I temporarily replaced the entire processor with a spare I keep and, still using the 'damaged' date cable, the shower works properly.
I insist I haven't broken anything whilst mending it (?), so my questions are based around what I should do to try to restore the function of the old shower processor. I don't want to donate my processor unit! As the customer said. "I used it only this morning and, apart from the dribbling, it worked fine. Now it doesn't dribble, but it doesn't work!".
Any ideas?
Customer complained of shower flow not stopping completely when switched off (dribbling constantly), in all other ways it worked perfectly well.
I stripped down the mixer mechanism, and found the two spring loaded seals on the two inlets were stuck back. Great, that would explain the dribbling. I freed them off, cleaned, and lubricated their guides with a smear of silicone grease. I was careful not to trap any internal wires on reassembly of the processor.
On reassembly I noticed that the data cable was damaged near to its plug end. I inspected it but the damage did not seem to be significant....for your information the blue wire had been crushed, presumably at the installation 10 years ago.
The new symptoms are that the temperature stepper motor will drive the control disc valve forwards on switch on (from the normal shower user control button), then it will reverse to the 'stop' position and the pump will not start. Strangely the user control button ('start/stop') remains illuminated, and no further action can be taken until the mains supply is cycled off-on.
I temporarily replaced the entire processor with a spare I keep and, still using the 'damaged' date cable, the shower works properly.
I insist I haven't broken anything whilst mending it (?), so my questions are based around what I should do to try to restore the function of the old shower processor. I don't want to donate my processor unit! As the customer said. "I used it only this morning and, apart from the dribbling, it worked fine. Now it doesn't dribble, but it doesn't work!".
Any ideas?
