The Gamewell ZANS 200 is a microprocessor‑based conventional fire alarm control panel used in commercial and industrial buildings. Common failures include power‑supply voltage drops or brownouts, relay contact wear on the zone and device circuits, and firmware corruption that can cause the panel to lock up or display error codes such as “E01” or “E02”. First‑check diagnostics: verify 24 V AC input and monitor the panel’s internal power rails with a multimeter; inspect all relays and contactors for signs of arcing or mechanical wear; review the panel’s event log and error code register via the serial console or web interface to identify any firmware or communication faults.[oss-gpt-20b]