Dover hydro with Ibm relays.

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#32275 - 12/26/21 01:23 AM Dover hydro with Ibm relays.
Joined: Aug 2016 Posts: 5 Bigshow79 stranger
Bigshow79 stranger Joined: Aug 2016 Posts: 5	Car runs but doors wont open.I have 300dc at Da1 and Da2.

#32277 - 12/26/21 02:45 AM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Nov 2009 Posts: 410 Johnny Journeyman
Johnny Journeyman Joined: Nov 2009 Posts: 410 Portland. Oregon	Open Armature, bad brushes ????

#32278 - 12/26/21 02:49 AM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Nov 2009 Posts: 410 Johnny Journeyman
Johnny Journeyman Joined: Nov 2009 Posts: 410 Portland. Oregon	300VDC relative to what?? each other (answer above) referenced to negative on rectifier?? referenced to Positive on rectifier?? Do you have a door operator print??

#32280 - 12/26/21 12:29 PM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Aug 2016 Posts: 744 Jluff old hand
Jluff old hand Joined: Aug 2016 Posts: 744	I had this once on a DMC. . It was bad capacitor under door controller But it was intermittent Last edited by Jluff; 12/26/21 12:29 PM.

#32281 - 12/26/21 04:38 PM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Apr 2013 Posts: 17 slider stranger
slider stranger Joined: Apr 2013 Posts: 17	If you are reading 300vdc between DA1 and DA2, then motor armature is open, probably the motor brushes

#32282 - 12/26/21 11:59 PM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Aug 2016 Posts: 5 Bigshow79 stranger
Bigshow79 stranger Joined: Aug 2016 Posts: 5	Yes. I have a faded door operator prints. If i open the door with operator de energized. When its energized it will close it. Bad re

#32283 - 12/27/21 01:17 PM Re: Dover hydro with Ibm relays. [Re: Bigshow79]
Joined: Feb 2013 Posts: 759 john jay old hand
john jay old hand Joined: Feb 2013 Posts: 759 ohio	I would look at the capacitors that are paralleled around the contacts on the open and close relays. One of them is most likely shorted.

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