I know there's several posts about this, here and other places, but I seem to get errors no matter which method I try.
I'm trying to fill an adjacent cell with a value based on the corresponding value from a list of values. For example, there's a list of Test -> Action pairs, defined in two columns. In another cell, I want to type in a value which exists in column B, and then fill the adjacent cell with the corresponding value in column A.
Here's my Sheet.

The columns "Actions" and "Tests (test groups)" define the corresponding values.
I'm using VLOOKUP in the "Test (test grop)" column (below the first two columns, from row 10 and down), to fill the cells when I'm entering a value in the "Action" value. Simple enough.
However, now I need this exact functionality in another sheet. I need to move the "Action" and "Test (test group)" columns - row 10 and down - to another sheet, and still reference the values in this sheet (row 2 - 6).
I've tried INDIRECT and a couple of other alternatives, and all give me either "#REF" or "#VALUE" in the cell where I use VLOOKUP.
Anyone able to explain how to do this, related to this example?