I made some progress this morning, but still not there yet. I took the RRS out of the equation and only connected one smoke to the 2WMOD2. It still indicated the smoke was in alarm. I swapped the smoke for another one and the 2WMOD2 started behaving as expected. So I put the bad smoke aside and put the RRS back in and added a second smoke to the loop to keep troubleshooting a little easier. I powered everything up and the 2WMOD2's green LED started blinking after 2 minutes. I believe this is expected and indicates that the smokes can communicate. I checked the smokes and their green LEDs were blinking every 5 sec as expected. I then pressed the EZ Walk button and the the 2WMOD2 went into EZ walk mode as indicated by the yellow LED. Both smokes behaved as expected with the green LEDs blinking twice every 5 sec. The OPII was happy and not reporting trouble on that zone.
I thought I was done, but when I went to test each smoke, I got no audible alarm out of either smoke. When I depress the test button, the red LED lights for about 1 sec and then nothing happens. Both smokes did this. After I do this, the LEDs on the smokes do nothing. The green LED no longer blinks every 5 sec. If I reset the panel, they go back to flashing as expected.
I find two things puzzling here. Why would the test fail? I would at least expect the alarm under test to have its sounder go off, but I get nothing. The other oddity is that no LEDs blink after pressing the test bottom. It seems highly unlikely that I also have a bad RRS, but I can't think of what else could be wrong here. How can I test the RRS to ensure it's functioning as expected?