BASF ST412 drive error codes...

I've got a BASF 6185 ST412-interface drive which is spinning up, zeroing the heads, and then giving three short pulses on the LED followed by one long one. Anyone have a reference handy to tell me what that particular error code means? I suspect it's the same on various BASF ST412 drives, so a manual from one of their other models might give the answer too. I'm kicking myself as I found these once a few years ago online and now they seem to have vanished. I had the drive working - briefly - this morning, although it was throwing up too many data errors to actually boot the OS [1] that was on it. Now it's just giving the LED fault code above and not returning anything though, so I suspect something terminal has happened. (And the exact meaning of the fault is probably academic) [1] It's the only copy of Torch UNIX for BBC micros (using a Torch 68000 co-processor) that I'm aware of, and a viable set of install media doesn't seem to exist, unfortunately. cheers Jules