Trane FT698 varaible frequency control drive

The Trane FT698 is a 40 HP, 460‑V variable frequency drive used in commercial HVAC and industrial motor applications. Common failures on this model include overheating of the power MOSFET array, failure of the control board’s microprocessor (often indicated by a “CPU fault” or no LED status), and degradation of the input/output protection circuitry due to voltage spikes. First‑check diagnostics: verify the 460 V supply is within spec and stable; inspect the drive for excessive heat, burnt components, or loose connections on the control board; review the built‑in diagnostic LEDs or error code display for specific fault flags.[oss-gpt-20b] Post Comment

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