Whynter error code Lo Volt
Whynter low-voltage battery-protection cut-out. On the FM-series (12 V) the unit stops running below ~10.4 V and restarts at 11.8 V or greater; the cut-out voltage is user-settable to 10 V / 10.7 V / 11.8 V (press SET 3x, then +/-). ("Lo Volt" is the suite's label for this low-voltage condition; the FM-G panel indicates DC + a battery icon rather than a literal "Lo Volt" string -- built-in / dual-zone models may differ.)
What to check, and in what order, is in the app. The flow RV Refrigerator — entry diagnostic (absorption + 12V compressor + residential) walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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