Thinking of a new gadget...

[max]

Csory this version is an improvement with the new diagram etc.

the adjustment section is actually overwhelming and i have to scroll back and forth between pages to find what to input into the display, i suggest putting it all on one clear page something like this;

To adjust the setpoint values in the menu the pushbutton switch needs to be plugged into the system and removed when finished.
The button is a combination of three switches conveniently combined in one unit; up (right turn) down (left turn) and enter (push)

( you did not explain HOW to step through the menu and enter values, if you enter a value do you select the value with "enter" and then "enter" again to step to the next item in the menu (guessing) and can you step back in the menu? )

The setpoint values are changed in the following order;
celsius or fahrenheit
backllevel 0 to 100 %
contrast 0 to 100%
display up or down
engine cold warning on or off
engine cold setpoint 20 to 100 deg c
oil overtemp setpoint 100 to 150 deg c

etc that way all info is on one page and also makes more sense to understand what to expect next on the list, how to get to it and how to adjust it.

The - decrease arrow is pointing in the wrong direction but the picture is good.

What's in the box could be just one picture with text inserted to show what the parts are called.

What happens if the 6 way header is connected the wrong way round and operated?, any damage?, is it protected from rain?

For such a simple device i would expect a simple but concise document, 40 pages seems a bit much, especially in pdf form, i think 6 pages should do it.

This was around three hours of reading, scrolling and thinking, see what you can do.