Re: Non-standard fault code for Amica AWCM10L.
Right, upon closer inspection, the overflow pipe from the powder drawer had come loose and was allowing a small amount of water kept landing on one side of the motor. This appears to have worn down one brush more than the other. So although the motor turns its not turning quick enough.
Although there could still be a problem with the tachometer itself, I’m going with the most obvious solution first.