Fault usually appears after long run from top to bottom or vice versa but resumes to normal automatically and after car call is registered.
We have already replaced Car Guide rail shoe to ensure Magnet switches does not go out of alignment, replace DCBG, perform Load testing, change Magnet switches 61 and 77 but still the fault still persist.
We can perform test run and complete shaft setup however after some time fault 152 is encountered
Could anyone share their experience and solution about this, Thanks in Advance Vators
Make sure your gap is 3/8”
Make sure your magnet doesn’t have a crack
I’ve also seen the the magnetic field be to great and activating wrong interval
We also encounter sometimes that the car is a bit higher or lower from landing door, on top floor or lowest floor.
Gap was double checked already for clearance, we will check for the crack on magnet, yes I've also read that the bistable switches are sensitive so I have ensured gap clearance from each other and railings are adjusted properly.
What I am suspecting now was the ADO Board as sometimes the 61 and 30 will not trigger and fault 152 appear, isn't 61s and 77s all go through ADO relays, we even encountered 0076 - 553 relay in door zone supervision circuit did not work, we encountered this 2 times already this morning, I think I'll have to checked also the power supply to this board as I see also the start Permit LED are dimmed.
If you can share advise or thoughts again that would be great, thanks mate.
Can you disable ado/acl to see if that fault goes away? Isolating the relay.
Definitely check power and ac ripple
Only other thing I can think of off hand would be brake, load weigher, rope slip - if the car is drifts passed the magnets and relevels it will change the state of the switch.
Keep me updated