Video: https://vimeo.com/46897584
from 25s to 60s the compressor on the right goes on and off. Left compressor works well.
Clixon protect it from overheating. In the 30s of works, touching the pipes i can fell the gas is correctly compressed (it's hot) and at the end is correctly cold.
Compressors are 19 years old.

Right compressor is died and must be changed? (maybe the coils? should i check them with a tester?)
New combined fridge-freezer...any suggestion? how are the Bekos?