I’m having issues setting up my brand new brewpi spark to control the refrigerator compressor. The spark, sensors, and web interface all seem to be working normally, but the compressor will not stay on to cool the fridge. Please see below for pictures of my setup.
I followed the fridge hacking guide first under Method #1 (switched power cord) and later with Method #3 (fully integrated SSR) with the same result. The compressor turns on for only a couple seconds at a time despite the brewpi remaing in in “cooling” mode (fridge constant 40°F) and the SSR having a solid red light. After a few minutes being off, the compressor makes an audible “click” noise and turns on again–only for a couple seconds and the cycle repeats. This also happens with the brewpi in Test mode.
Reading through other internet articles, I suspect this might be related to an interaction between my SSR and the compressor overload protector. The fridge seems to operate just fine on its own when not connected through the brewpi switched power cord.
Any advice on how to test my setup and wiring would be appreciated!
Refrigerator wiring diagram:
SSR switch box: