Before you can clear the noise, you must identify the root cause. Below are the top five reasons for a mechanical scratch in the Otis Gen2 platform.
Mark the edge of the belt with a piece of white chalk. Run the car for 10 feet.
Sometimes a screw, a dropped tool, or a piece of concrete gets lodged between the belts and the sheave. otis gen2 scratch
Preventive maintenance is cheaper than replacing a scratched traction sheave ($2,500+ part).
A property manager in Chicago contacted us after tenants threatened to break leases over "the screaming elevator." The Otis Gen2 machine had a scratch so loud it could be heard two floors away in the stairwell. Before you can clear the noise, you must
Otis Gen2 elevators are among the most popular machine-room-less (MRL) traction elevator systems in the world. Known for their flat steel belt technology and compact design, they offer reliability and energy efficiency. However, like any complex electromechanical system, they are prone to specific diagnostic codes.
Among technicians, one of the most dreaded and misunderstood fault codes is the "Otis Gen2 Scratch." If you have seen this notation on a service tool or heard a distinct metallic noise from the hoistway, you are likely dealing with a serious mechanical or electrical fault. Run the car for 10 feet
This article dives deep into what the "Scratch" reference means, the official fault codes associated with it, step-by-step diagnostics, and permanent repair solutions.
If the belts are not perfectly perpendicular to the sheave grooves, the edge of the belt will rub against the side of the groove. This "edge-scratch" produces a consistent, metallic screech. This is often caused by improper installation of the drive motor or worn-out suspension bushings.
