Whilst this is a photo copy, and some of the pages are a little askew, it was all readable and intact. A real bonus finding an old manual for a classic piece of kit that no other site had.
It was easy done, and I got exactly what I was looking for.
Text excerpt from page 8 (click to view)
Maintenance of your Refrigerator-Freezer
Prior to undertaking any maintenance operation, be sure to unplug the appliance.
Defrosting of the freezer
The inner walls of the freezer become gradually covered with a layer of frost keeping in mind not to open the door frequently and keeping the food wrapped up in closed bags. Whenever the thickness of ice reaches 5 mm. the frost should be removed. Here to proceed as follows: 1... Remove all food staffand place it in the coolest possible place.. 2Â…Place the Plastic Scraper (supplied with the appliance) into the existing slot above the plinth. 3Â…Place a bowl under the outlet to collect the water. 4Â…Pull out the drawers and the upper tray. 5Â…Under no circumstances should you try and tear off the ice formed, wait for it to melt away. 6Â…Once the ice is eliminated and the appliance is clean and dry, remove the plastic scraper and replace the drawers and the upper tray. 7Â…Plug in the appliance.