Mce scr drive

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Mce scr drive #26175 03/11/19 09:11 PM
Joined: Jan 2014 Posts: 13 wash dc northern va M mar stranger
mar stranger M Joined: Jan 2014 Posts: 13 wash dc northern va	Getting intermittent insufficient DC loop current feedback faults any ideas already adjusted tp3 test point to ground for 0 millivolts changed scr pri board

Re: Mce scr drive mar #26176 03/12/19 12:26 AM
Joined: Dec 2015 Posts: 1,766 Likes: 11 Local 18 I Indirtwetrust ElevatorPractitioner
Indirtwetrust ElevatorPractitioner I Joined: Dec 2015 Posts: 1,766 Likes: 11 Local 18	Check the brushes, rigging, & connections

Re: Mce scr drive mar #26284 03/23/19 02:22 AM
Joined: Jan 2014 Posts: 13 wash dc northern va M mar stranger
mar stranger M Joined: Jan 2014 Posts: 13 wash dc northern va	Changed scr pri board right above drive and p4 relay my problem has home away

Re: Mce scr drive mar #26301 03/25/19 06:52 PM
Joined: Jan 2014 Posts: 13 wash dc northern va M mar stranger
mar stranger M Joined: Jan 2014 Posts: 13 wash dc northern va	Correction that was the pt4 relay right next to my scr pri board causing all my intermittent problems

Re: Mce scr drive mar #26353 03/31/19 01:41 PM
Joined: Jan 2015 Posts: 118 Chicago T Turbo6 member
Turbo6 member T Joined: Jan 2015 Posts: 118 Chicago	Motor field voltage will also cause this. Try bumping voltage up slightly, also a current sensor going bad will cause this.

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