MemberOctober 26, 2021 at 1:31 pm
Hi everyone, my parents’ straight stair mounted stairlift badged “Meditek” hasn’t been used for a few months (but I think was left powered on). It’s displaying ‘Switched off’. The transformer is powered on with a green light. The isolation switch on the chair carriage is turned on (green visible). But turning the key (it seems to turn 45 degrees clockwise/anticlockwise to a click stop) makes no difference with the arms up or down and the chair will not move. The Holding button is working and changes the display so looks like power is reaching the chair. There is no audible sound or bleeping. I noticed the chair is not quite at the stop of the stairs if that makes a difference.
Any ideas? We have no manual.
MemberOctober 26, 2021 at 2:18 pm
It sounds like your batteries are either totally flat or disconnected. It may be worth trying the various combinations of chair isolator switch and keyswitch in each of their respective positions.
MemberOctober 29, 2021 at 5:50 pm
first off check the lift is on charge? switch off the charger and see what the display says and if it start beeping? then go through the switches to see that they all switched on?
if it beeps when the charger is off then the carriage switched on, at the main isolation switch leave that as if and flick the charger back on, then start on the key switch and the holding switch, if the holding switch shows up on the display as holding switch and glows red depending in switch type, (push button under arm) then its ok? the key switch should be able to be pulled out when the switch is in the off position, turn it and pull it, if it comes out replace it and turn it again, its now on, thats still no proof the key switch is ok! but we will get to that
display still showing switched off can either mean that the loom to the arm is open circuit or the chair arm board or main board is us!
mediteks are known for the cables to snap in the pivot point where the arm meets the chair frame, cheap, thin wire with low copper content, there was a reason they were a cheap lift, still good though in their day
remove the carriage cover, 4 screw and lift off making sure you dont pull the seat swivel switch wires apart, on the main board a series of plugs, running along the bottom edge, above these on the right hand side of the board a set of three terminals, depending on the year? these will either be bare or have three wires atatched to them? red, yellow and green…
these terminals when connected together will make the lift run, these are the joy stick connections on the board, shorting out these connectors will, hopefully make the lift run proving the board is ok! short out between the center one and the bottom one only, if the lift moves, repeat with the top one, it should move again? if so the board is ok and the issue is the chair
chair arm is held together with two screws, lift arm undo screws one at time, when they rattle around place hand over the hole and fold arm down and catch screw…. saves time looking for it when it bounces down the stairs… 🙂
there will be a million wires in that arm! kidding! although it will seem like it!
first off test the key switch unplug it and short out the plug, lift runs? cut the wires and connect them up bypassing it, lift fixed 🙂 if not read on…
hopefully the break will seem clear and you will see the broken ends flapping round, fix the break and test run lift…. if not its a case of applying a bit of pressure to the cables to see where the break is as the core is broken the outer insulation will stretch under pressure showing where the break is, personally I would just cut out the wires not needed and replace the loom from the underseat connection to the chair arm board removing the holding switch and key switch from the circuit if they are not used removing the items that will fail or cause issues later!
I have a tester kit made up to save me time on site, this is just a copy of the chair in miniture, I can plug it in straight on to the main board and it mimic the rest of the lift, displays the messages and operates the lift. you can do the same to test the lift but it will involve you taking it apart a bit more!
so with the arm off you have access to the chair arm board, you will need to remove this from the arm moulding to gain access to the plugs, possibly three plugs on the board? unplug the red, yellow, blue wire plug,thats the main feed up from the main board, now remove the plastic/metal cover that the seat pad folds down onto, under there is a either a another circuit board or a connection strip with two plugs on it? your looking for the wire that comes up from the carriage unit, unplug it and plug it into the chair arm board and see if it runs? if it does its deffo the chair arm loom or key switch!, find the break and fix or as suggested strip out the existing loom and replace minus the possible unneeded switches,
but them wait! the reason why there is a million wires in the arm? in their wisdom meditek pre wired the lift to be upside or down controls, you may be able to swap the control arm over to the other side but there in no guarantee that will work though!
if you go down the rip it out and rewire route, replace the loom use a a section of three core .5mm flex and replace the loom back to the connector strip under the seat pad, cutting off the plugs leaving plenty of wire so you can connect them up easily, the holding switch may be a straight plug on the chair arm board and the key switch connected in the wires to the chair arm board so if you really wanted to as we know that works ok from testing it earlier you can cut the wires leaving that in the circuit
good luck in fixing it, if they are looked after and treated right they are a good little lift, parts are getting hard to get hold of but I have few left in the parts box on the shelf for emergencies
also as suggested if the batteries are dead? if its been left off charge 2 x 12v 7 ah batteries from screwfix dont get suckered into a £200 call out rip off that some so called engineers pull, lowest of the low prey on the needy
may help putting you location on your post so if needed we can suggest someone to you
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