To successfully perform a buffer test, which limits must be disabled?

To successfully perform a buffer test, it is necessary to disable the direction and final limits. This is because the buffer test involves evaluating the functionality of the buffers without restrictions imposed by the elevator's operational limits. Disabling the direction limits allows the elevator to move freely in both directions during the test, while disabling the final limits ensures that the elevator does not stop prematurely at the terminal landings. This testing is critical to ensure that the buffers can function effectively to absorb the energy of an elevator in case of an unexpected descent, allowing a proper evaluation of their performance without any unnecessary interruptions caused by the limit switches.

Understanding this aspect of buffer tests is essential for effective hoistway maintenance, as it guarantees that all safety devices are functioning properly and assures the safety of the elevator system.