Hi guys.

Have a question in which I'm hoping the more experienced engineers may be able to help me out with.

I carried out a HP trip test but chiller didn't trip out on HP. It sat at 13.9Bar before going out on compressor overload and condenser fan overload.

Now this circuit is R134A and appears to have a lack of fridge, although only running at 25%, no flashing sight glass and green, no temp difference across the drier cores, fans working well. The other circuit tripped out as it should.

The only thing noticeable was the heavily frozen eev.

Would this possibly be a HP switch or due to the lack of fridge or something else possibly?

Help appreciated as I'm only new to this game.

Thanks