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acorn bison 80 stairlift
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When the acorn 80 bison is switched on no green led appears. I have demonstrated that 33 volts is being supplied to the charger connector on the PCB. The fuse is intact on the PCB, but no current appears to be being supplied to the battery connections on the PCB. Please could someone advise or other tests that can help to locate the problem.
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So if I’m reading this right your saying no voltage from batteries?
Is the lift on a charge point?
Has the lift been left off a charge point for some time?
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I’m having the same problem, I have 33 volts at the charging plates but no voltage at the spade connections on the main control PCB. where the battery’s connect to the PCB. If I remove and charge the battery’s with a 12 volt charger, reinstall the battery’s everything works fine. Main Control PCB just will not charge battery’s. and yes the chair is park at the charging station.
Any ideas ?
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If the batteries have been allowed do discharge then this is what you have. If so you have 2 options. 1 new batteries and reset the datum. 2 Remove the batteries and connect them in series ie red to black you now have a 24v cell. With the charger on put your meter onto the charge point on the rail to identify pos neg. Hold the batteries red to pos black to neg (connected in series) for about 2 or 3 minutes then re fit batteries in lift. (The lift must be on the charge point) if you switch the lift on it should power up. You will need to allow to charge for a few hours then reset the datum.
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Ian, I’ve read this post several times now because I’m having the same issue, but I’m not understanding your response. My lift is on a charging point, there are 33v at the charging plates, the batteries currently are low but not dead, and the lift will not charge the batteries (no voltage at the +/- blades on the board where the batteries connect). Aside from the two 25a blade fuses on the batteries and the one glass fuse on the front of the main board (mid height, right side when board is installed), are there any other fuses in the system that would have anything to do with charging? As I’ve stated, the batteries have enough power for the lift to be useable, but the lift isn’t charging them. It continues to beep whether it’s on a charging point or off.
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If the 20mm fuses on the board are ok then check the integrity of the wires from the charge pins to the board if that’s all good then it sounds like a board fault 🙁
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