ABB INC. TST FU3P-BP Gate Door Opener

The TST FU3P‑BP is a 3‑phase drive control main board used in ABB gate‑door openers, rated for 400–460 VAC and 5 A at 50/60 Hz. Common failure points include power‑stage components (IGBTs or MOSFETs), gate‑drive ICs, and protection diodes that can fail from overcurrent, voltage spikes, or thermal cycling; insulation degradation between the high‑voltage bus and chassis is also frequent in long‑running installations. First‑check diagnostics: verify input voltage and phase balance with a multimeter, inspect the board for burnt or swollen components and check for visible arcing or corrosion, then read any stored fault codes from the controller’s diagnostic port if available.[oss-gpt-20b] Post Comment

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