Remedy: Exit Cover 1 Is the Exit Cover opened? Yes Close it. Switch (MS1) 2 Check the voltage at J112-4 on AC Terminal PCB (PW12010) with a multi-meter. Is it 24Vdc? No Replace the Switch with the new one. AC Terminal PCB (PW12010) 3 Check the voltage at J113-7 on AC Terminal PCB (PW12010) with a multi-meter. Is it 0Vdc? No Replace the AC Terminal PCB (PW12010) with the new one. DC Controller PCB (PW12020) 4 Check the voltage at J207-22 on DC Controller PCB (PW12020) with a multi-meter. (Signal Code: 49) Is it 0Vdc? No Replace the DC Controller PCB (PW12020) with the new one. Wires 5 Check the wires between AC Terminal PCB (PW12010) and DC Controller PCB (PW12020). Are wires connected properly? No Connect the wires properly Yes Replace the DC Controller PCB (PW12020) with the new one.