Identifies problems within the lift system?

• A. Noise Sources
• B. Self-Diagnostic System
• C. Track/Rail Lubrication
• D. Remote Parking Feature

Answer: (B)

The key idea here is fault detection and system health monitoring. A Self-Diagnostic System is built to continually check the elevator’s or escalator’s drive, controls, safety devices, and sensors. It runs self-tests, compares sensor readings to normal ranges, and records fault codes or triggers alarms when something isn’t right. This lets technicians quickly identify which part of the lift system is having issues and take action before a minor fault becomes a bigger safety or reliability problem.

Noise sources can indicate problems, but they’re symptoms rather than a dedicated mechanism for identifying faults. Track/rail lubrication helps reduce wear and friction but doesn’t tell you what’s wrong. A remote parking feature is simply a convenience function, not a diagnostic tool.