Posted By: MikeF
TAC 50.04 MRL UCA3 Fault - 09/22/17 09:39 PM
Hey guys, stepped into this job as a favor. New 2013 Tac 50.04 MRL. Bldg and TKE says they had a electrical spike. Only board showing signs of a problem is the little UCA3 board. The Fault light is lite up. Looking at the board there doesn't seem to be much to it. the picko fuse is good. Ordered a new one as TKE was going to do, but I have this feeling that's not going to be the problem. All of my TAC 50.04 documents don't have the UCA3 board in them. Is anyone familiar with this board and its function? Is there something that would cause it to indicate "Fault"? Any advise is appreciated. Thanks Mike-
Posted By: Rolly
Re: TAC 50.04 MRL UCA3 Fault - 09/22/17 09:46 PM
UCA3 monitors the UPS supply
Posted By: MikeF
Re: TAC 50.04 MRL UCA3 Fault - 09/22/17 09:48 PM
ok, ill double check that to make sure all my voltages are good. Thanks-
Posted By: Jm160
Re: TAC 50.04 MRL UCA3 Fault - 09/25/17 08:41 PM
If the battery is dead it will fault out the uca3 board. There is a parameter that sets the time the brake picks on rescue op. I believe it's b43 temporarily set to a zero and see if the car runs. If it does then the battery is probably no good.
Posted By: Silly
Re: TAC 50.04 MRL UCA3 Fault - 09/26/17 03:37 AM
There is a board in the battery that also can go bad, right where the (9pin?) connector plugs in. Have had a few bad on construction and that is the replacement part that gets sent out.