Vanner IFM1 Interface module

The VANNER IFM1 is an interface module that relays data between a Vanner inverter or battery charger and remote ON/OFF switches or status monitors, commonly used in emergency vehicle power systems. Common failure points for this class of modules include damaged data cables, solder joint fatigue on the communication ports, and firmware corruption leading to loss of signal or error codes such as “COMM_FAIL” or “TIMEOUT”. First‑check diagnostics: verify that the module receives proper 12 V/24 V input from the inverter, inspect all cable connections for continuity and physical damage, and review any diagnostic LEDs or serial log output for error flags. If power and wiring are correct but communication still fails, test the module with a known good inverter interface to isolate firmware versus hardware issues.[oss-gpt-20b]

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