How to Troubleshoot Missing MUX Smoke that Still sets the Panel in Alarm when Tripped

[#1]

Issue

MUX Smokes show missing at the panel but they go into alarm with a magnet test.

Solution

The devices are miswired. Buss positve should be wired in and out on terminal 1 and the buss negative should be wired in and out on terminal 3. Terminal 2 is not used.

Part numbers MXB2W, D7050, D7050TH, D7050-B6, MX250, MX250TH