I think I may have a similar fat finger type problem that Marlpitlane suffered from but first some context.
I had a local company install a “reconditioned” Acorn 80 for my mum just over a year ago which has been mainly unused. A couple of weeks ago her carer tried to use it but it was dead so they called a service number which they found on a label on the stair lift. The “engineer” diagnosed the problem to be a faulty battery pack which he would be happy to replace for £275. Luckily they then called me for advice. Having been an electromechanical/electronic engineer most of my working life, I thanked the “engineer” and sent him on his way before heading to Google.
After some research I came across this helpful forum and discovered that if the batteries were totally flat the recharging circuitry won’t initialise when the power supply is turned on – what a wonderful design!
I used my motorcycle trickle charger to get some life back into the batteries before re-installing them and am now waiting for them to fully charge before resetting the datum.
While waiting I have noticed a couple of things.
The Hinge Zone switch and red LED is on. Is it supposed to be on in normal working conditions or could I have knocked the switch while removing the batteries?
The 33V 1.5A power supply seems to be a replacement. Although it supplies 33V under no load, when the batteries are in fast charge mode it seems to fluctuate between 14V and 20V. This doesn’t seem right and may point to a failing power supply.
