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Stannah 420 battery connections
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Hi All,
My deceased partner had a little used stairlift installed, the chair has a panel marked 420, which I assume is the model? Rather than remove it, as they have such little value, I kept it in case I might eventually need it, though it does sometimes prove handy for shifting heavy items up and down the stairs. Whilst still under maintenance contract, I discussed the lack of use, wasting energy and keeping the batteries charged, with the engineer. He suggested that I could switch the charger off, if the switch on the arm was also turned off – which would leave the batteries isolated – WRONG. It still flattened and wrecked the batteries, so I added a switch in series with the link, between the two batteries – not realising that there was a 12v tapping for something (???), so one battery still got flattened and wrecked.
Does anyone know what this separately fused 12v tapping is for please? I should still like to find an easy way to isolate the batteries. Does anyone have a circuit diagram for 420 please, there isn’t one anywhere on the unit.
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12v Supply was probably for powered option such as powered swivel seat.
There is an isolator switch on the back of the carriage (it will be near to the wall )which will isolate the batteries and allow you to turn off the charger. I would recommend you run a routine of 2 months off then 1 week on charge to ensure the batteries are kept in a good condition. Also during the week whilst it is on use the lift a few times to keep grease, gears, motors etc. mobile.
You will know when the lift is switched off as the top safety edge will produce a clicking noise when pressed, this is a special connection to the motor brake to ease hand winding – make sure nothing is holding that safety edge in or the batteries will still deplete.
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Thanks, I had no idea that switch was even there, and it does indeed isolate the batteries fully, apart from when that . No current owing on my meter, with that switch at the rear turned to off. I also hear the click, with it off, when the safety edge is touched, so something to watch out for.
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