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Stannah 420 problem
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Hi, my grandad has a Stannah 420 stairlift which he has owned for 8 years and it was a reconditioned one when he got it. The stairlift will go up no problem but it will not come back down. We replaced the switch which is positioned in the left hand arm rest as we thought it might have just worn out, it worked for about a week and has now stopped again. It will work on the 2 hand remotes but not from the chair. My husband is quite handy at electrical work, when he bypassed the switch and linked the wires directly it did work, but having said that he did test the switch and doesn’t appear to be anything wrong with it, he did a resistance test on the switch and it worked in all settings. My grandad is 98 and cannot afford to get an engineer out so was hoping somebody could help us to try and get it working, it would be easier for him just to use the switch on the arm and we are worried that if he relied on the remotes that he will use the arm switch to go up but then leaves the remote downstairs and he wont be able to get back down. Don’t know if anybody has come across this before, thanks
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Remotes and joystick are two separate control systems, easy option is to tape the remote to the chair arm till you get it sorted so it’s not forgotten
in some of the 420’s there is a circuit diagram stuck to the inside of the seat interface covers, you should be able to follow the control circuit through using that and test it to see where the issue is?
possible loom failure? The wires fail with all the flexing when you fold the arms up and down or swivel the seat
also check in the downside arm for a switch? Some lifts had a downside arm switch that meant you had to have the arm folded down for the joystick to work, normally fitted when the control arm was on the upside, it was fitted so that you had to have both arms down to stop you sliding off the seat! Mind you that’s what the seat belt if for but how many users actually used them!
solus and sierra seats had seat pad switches, two switches in the base of the seat operated by two pips on the chair, these wear away over time, the seat casting is much softer than the steel pins they push down on
but from your description of the joystick it sounds like you have a Saxon chair? so start with the chair loom and arm switch -
quote fredt:Remotes and joystick are two separate control systems, easy option is to tape the remote to the chair arm till you get it sorted so it’s not forgotten
in some of the 420’s there is a circuit diagram stuck to the inside of the seat interface covers, you should be able to follow the control circuit through using that and test it to see where the issue is?
possible loom failure? The wires fail with all the flexing when you fold the arms up and down or swivel the seat
also check in the downside arm for a switch? Some lifts had a downside arm switch that meant you had to have the arm folded down for the joystick to work, normally fitted when the control arm was on the upside, it was fitted so that you had to have both arms down to stop you sliding off the seat! Mind you that’s what the seat belt if for but how many users actually used them!
solus and sierra seats had seat pad switches, two switches in the base of the seat operated by two pips on the chair, these wear away over time, the seat casting is much softer than the steel pins they push down on
but from your description of the joystick it sounds like you have a Saxon chair? so start with the chair loom and arm switchThank you for your help Fredt we will give that a go
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