Otis 401

greenspun.com : LUSENET : Elevator Problem Discussion : One Thread

I have a 401 which seems to have shut done due to heat, reset controller, (scr drive instead of MG). Drive goes ready, direction relays pick, KLA and KLB picks, every thing to run but car does not move. Drive remains high in close loop circuit always. Have remove and replace drive boards and relay I\O board. Manuel says there are two temp. sensors, located one under cpu, where is other one.

-- T.J. Molden (hmolden1@ticnet.com), July 09, 1999



One for the processor, and one on or near the scr bribge heatsink..

-- Joe M.. (Bachaglupy@aol.com), November 01, 1999.

There may also be a thermostat on the power isolation transformer core and/or one in the dc motor.

-- Don Vollrath (dvollrath@magnetek.com), April 27, 2000.

There is also a temp sensor located in the power supply for the pcb's.

-- Kevhunts (kevhunts@hotmail.com), November 20, 2003.

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