Car-Top Inspection Station With a Defective Stop Switch
You are alone servicing a 2005 traction elevator. You place the car on inspection operation at the fourth floor and step onto the car top to inspect the roller guides. The car-top inspection station has a working operating device and light, but the stop switch is broken: the button is missing and the wires are taped. You need to move the car about 6 ft up to reach the fifth-floor guide. The building is occupied and the elevator lobby is empty. Your cell phone has signal. The mainline disconnect is in the machine room, about 100 ft away. The car is between floors, so the car top is about 4 ft above the fourth-floor sill and about 8 ft below the fifth-floor sill. A helper is not on site.
1. What immediate action should you take, and why can you not simply move the car with the operating device?
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Do not move the car. The car-top inspection station is incomplete because the stop switch is missing and the wires are taped. Inspection operation from the car top depends on a working stop switch within reach of the mechanic; without it, you cannot stop the car promptly if clothing, a tool, or a body part becomes caught. Stay on the car top, use your phone to call for a second qualified mechanic or building response, and do not bypass or tape the circuit further. If the car top is close enough to a landing to step off safely using the manufacturer's procedure, do so; otherwise wait for assistance. Lock out the elevator before repair once you are clear.
2. What safe method should be used to finish the inspection, and what must be repaired first?
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Once off the car top, lock out and repair the stop switch with the manufacturer's replacement parts. Do not use the machine-room disconnect as a substitute for a car-top stop switch while riding the car top. After the switch is restored, test the stop function before using inspection operation again. Then use two qualified mechanics or the building's procedures for car-top work; one mechanic should remain able to summon help. Complete the roller-guide inspection only after the car-top station is functional and tested.
3. What verification and documentation are required before returning the elevator to normal service?
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Test the car-top stop switch, operating device, and light. Confirm that pressing stop removes power and stops the car, and that the operating device does not override the stop. Verify the inspection station works at more than one location in the hoistway. Record the defect, repair, parts used, and test results in the maintenance log. Remove the lockout and return the elevator to normal operation only after the inspection is complete and the car-top equipment is fully functional. Report the condition to the owner in writing so the taped wiring is not repeated.