Monday, September 17, 2018

Husqvarna auto mower 305 charging station blinks red.

Family lawn WallE unit started to misbehave more: it developed charging station failure with blinking red led. In addition to worn battery and not parking correctly into the carger and runing into it.


Manual says this is charger antenna failure signal, go to service people. This is my father's slave robot, so he went to husqvarna service, they had no idea how to even go about fixing this, I got to find out.

  The white wire that goes around it is the dock antenna. It has a piece of insulation worn off somehow and green corrosion on it. reconnecting there did not help at all, it still measured almost megaohm resistance, red blinking led too.

Changed the wire to piece of it's perimeter wire, antenna wire did not seems anything special wire to me, except the soft insulation, perimeter wire uses very stiff insulation material.

Electronics by the way is not hermetically sealed in this, but everything is coated in something, no corrosion on the pcb. But water was on everything for some reson, this of course is outside on the lawn. Main connector is not outside rated nor is the service connector... They are slightly corroded.
Now we have green light, station charges but walle slave is still not working correctly. We may have bad contact on guide wire or something.