Stannah 260 stopped on stairs - no power?

only one green light on in main power board is it right,

peter hunnisett
October 2020

CONTINUED: More information on the above problem:

The chair stops where the space between the two rails narrows to go down the staircase and blows the 500mA fuse on the PCB.

On the flat where the chair goes round a bend to its parking space, it works perfectly, blowing the fuse each time it reaches the same point to go downstairs.

Any help gratefully received.

Margaret
September 2016