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Topic starter
25/08/2015 10:06 am
Have a lift that momentarily doesn't accept calls and sits with doors open. Everytime we show up car is running. Customer isn't resetting. Changed main i/o board, and tone generator. Happens on all floors. Anyone ever seen this?
25/08/2015 10:28 am
Could be the door open limit not making. Or door close limit not breaking.
Topic starter
25/08/2015 7:32 pm
This would cause my calls not to latch?
25/08/2015 10:39 pm
Is the car stuck at a floor with a hall call lit? I would try the cop power supply and hall button interface board.
26/08/2015 12:51 am
Have you checked the photoeyes/door edge sensor? How about the door open button? Those Otis buttons are junk. The randomness leads me to think it could be one of these.
Last edited by rac66; 08/25/15 04:52 PM.
26/08/2015 10:20 am
Check or replace the power supply in the COP. You may have ripple on the DC outputs. There are 2 Caps on the power supply. They do decay. The caps are a voltage 2X circuit to supply the 30vdc. If the Caps are bad or decayed, when the line voltage drops the DC reacts violently. At least try replacing the Caps.