Otis Gen2 Scratch Here
These belts are thinner and more flexible, allowing for a smaller, gearless machine that doesn't require a machine room (MRL). The "Scratch" Issue:
| Step | Action | What you listen for | | :--- | :--- | :--- | | 1 | Run the car empty at contract speed. | Scratch frequency: A scratch per belt rotation indicates a localized belt defect. | | 2 | Run the car with partial load (50% capacity). | Worse with load = belt slippage or sheave groove wear. | | 3 | Visually inspect belts stopped. | Look for "shine" (polyurethane dust) or visible steel cables. | | 4 | Check the sheave grooves. | Use a flashlight. Any pitting, rust, or glazing indicates a problem. | | 5 | Measure belt tension (Otis spec: 250-350Hz). | Uneven tension causes belts to "walk" sideways, creating a scratch. | otis gen2 scratch
"Scratch" in Otis Gen2 systems is not just an acoustic nuisance; it is a mechanical indicator. Early diagnosis using systematic inspection and GTS fault codes prevents belt degradation and unplanned shutdowns. Technicians must distinguish between harmless surface marks and structural damage to the PBS belt. These belts are thinner and more flexible, allowing