Magnum MS Series error code DC VOLT DRIFT
Battery Temperature Sensor (BTS) adjusts charging voltage based on temperature. This is normal behavior when BTS is installed.
What to check, and in what order, is in the app. The flow Magnum: DC Charge Voltage Higher/Lower Than Expected (Normal) 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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- Magnum-MS-Series-Owners-Manual.txt