The MS-5024 is a conventional panel and does not utilize an SLC (Signaling Line Circuit) or addressable loop; those features are found on addressable panels like the MS-9200 [5].
Troubleshooting on this panel involves checking conventional Zone Faults or Communication Failures using the built-in Troubleshoot Mode. 1. Press MODE, enter 8768 (TROU), and press [ENTER/STORE] to enter Troubleshoot Mode (Page 59) [1].
Press 1 through 5 followed by [ENTER/STORE] to display the voltage for the specific zone (Page 59) [1].
Press b1 or b2 followed by [ENTER/STORE] to check NAC voltages; 0.00V indicates a short and -4.50V indicates an open (Page 59) [1].
Identify phone line faults by 'no 1' (Primary) or 'no 2' (Secondary) messages on the display (Page 50) [1].
If a Communication Fault occurs, it indicates the panel failed to reach the central station after 10 attempts (Page 50) [1].
Manually test phone lines by pressing C/D (Primary) or E/F (Secondary) then [ENTER/STORE] to seize the line and verify dial tone (Page 60) [1].
