Figure 4-2. Universal Alarm Panel, Schematic Diagram
4-16. Troubleshooting Chart, CAU/CCU Alarm Panel
Check and corrective maintenance
No alarm (gnd) output with
a. Loss of 120 VAC input power.
a. Check for 120 vac at TB2 terminals 3
a known alarm signal on
and 4 and at the 6 vdc power supply.
TB1 or TB3.
Apply power to unit or repair wiring as
b. Ground not connected to panel.
b. Check for ground potential at terminal 2
of TB2. Repair wiring as required.