The D7038 sounds the Horns and flashes the Strobe OK for the first 10 or 15 seconds then they all stop for a short period and go again. What causes this happen?
The output device is drawing to much current from one of the NAC circuits. There are 6 Amps of current available for the D7038. The max current of any one NAC output is 2.5 Amps. If 2.5 Amps is used on one NAC circuit, it leaves only 3.5 Amps total for the 3 remaining NAC circuits.