- Was the panel powered up at the time and does the manual say it should be when you do these tests?
- Both NAC1 and NAC2 read the same reading but both have different loads?
- Did you try flipping the polarity of your meter?
- Does the panel have any troubles when all the resistors and batteries are installed, with no devices connected?
- You are positive (har har) the resistors you are using are indeed 10K – Brown Black Orange Gold – right?
- Is your method of reading the resistance correct? You should say exactly how you are doing it.
- What kind of wire are you using?
Here’s why for each one:
- Whether the panel is powered or not would have an effect. If the manual says that it has to be powered on when you do these checks, make sure you do that.
- See #3
- At first I thought you might have been reading the MT’s resistance but you mentioned NAC 2 is doing the same thing.
- If there’s anything wrong with the panel’s internal circuits then game over.
- This does matter… by your description it sounded a little like the ohm value of your resistors is too low.
- Just checking.
- This matters a lot, as too thin of a gauge can produce a lot of resistance on its own.