Home Forums General Discussion Technical Questions Dmc entrapments

Hi. I have a DMC that has entrapped passengers twice in the last 5 weeks.

Both times on the bottom terminal landing (also the lobby and primary fire floor)

Both times doors closed in fire service

Eventually it resets after multiple attempts involving phase 1 and 2 on both fire floors.

Has anyone seen this b4? The building has no fire alarms tripped. It’s going into fire service on its own.

I had one doing some strange things on fire service. I’d even replaced the CLC by download and upload from FAST. The solution here was to do a cold start, re-enter all the parameters, HW scan, door scan.

Txs dirt. I will try that

Cold started it. Set up all parameters. Still in FEO. I’m going to change the CLC next but doubting if that will fix it

If you look at all your fire service inputs, does the CLC see any incorrectly?

I never got a real cold start the first time. Never got 15 fault. Now I got that and I reset it all up and it’s out of fire service working good. Besides one weird door issue. When the car first arrives at a floor and the door opens it never opens in high speed. But if you re open the door at that same floor it opens perfect. Once car moves to another floor it opens slow first time it arrives.

It’s like it opens in a learn mode every time car moves. Only the first time it opens. Then after re open at same floor it opens perfect. Then move car and it opens slow first time.
I started door scan with door open. I think I need to start door scan with door closed.

I always start the scan on a DMC with the doors open. Maybe if the limit was way too early… When the doors close at the floor the count matches the scan so they re-open at full speed but when the car runs, the doors squeeze too many counts past the limit so it opens slow on the next trip. I think the door should log a fault when it goes to manual speed like that. It means it didn’t like the count the last time the door operated.

Check the door belts if you are getting faults like this.

Ya that could do the same thing if the belts slip while the door is squeezing

So I may need to adj my DCL on the door operator board but I’m not getting any faults.

Put DCL as close to full closed as possible without being intermittent or relaxing off of it. Then run a new scan after moving the limits even a little bit. Same goes for newer TK equipment too.

Update. Starting the door scan with the door closed solved the problem 🤷‍♂️.. so everything is working great now.

But the original problem of going into FEO and entrapments will still happen again. This happened with 2 different CLC boards. So I guess new software is needed ?

Software tends to be a go/no-go type of thing. I’d be really surprised if the software was causing the thing to intermittently go on fire service.

Any idea on year of this unit? If its an older DMC( early to mid 80's) change the power supply in the bottom of the car station. I am seeing these power supplies being at the end of there life span.

Mid 80s

Do the passengers report any type of noises when it stops? The DMC will give you a API beep when the processer reboots. If they are hearing a beep, then its most likely rebooting. Change the power supply.

Could be software chips going bad. If you changed the clc. Make sure all boards match. Like all blue boards , all green boards, This goes for all even in group…..
Make sure pins on chips are seated good. Also try power supply like Tramguage1 said.
Remember DMC are the best (their tanks) TK made and now. In 2024 they will now longer have OEM boards.