And in this photo, the EL 961 POLETRON control unit also has a single sensor and has identical characteristics to the previous RANCO unit, but with one significant drawback - it is a very weak load switching relay. In the photo, it is surrounded by a green oval. Under the red oval is indicated the chip switching this relay ULN 2003A and this chip is already controlled by the central processor installed on the submodule. These are the cheapest control units on the service market, so it's up to you to decide which unit to buy. After all, even on household refrigerators there are relays for switching the compressor 16 amps. I will give an example: if you install such a unit on a freezer with an EMBRACO ASPERA T2180GJ compressor, then this unit will fail on the first day of operation, and specifically the switching relay of this compressor will burn.
