Carrier Master Link II issue

[kevingrange]

I've been working on a Carrier 50YZ packaged unit. It cycles on and off for about 2 minutes. I've tested all safety devices and the two fan motor thermal overloads, all are fine. It's got a Master Link II control board a MM195-BBx I think it is. I can't find a single bit of information on these, I've heard you have to configure these things for different units and they are well known for problems. Any help with a good resource on these things would be a great help.

[Brian_UK]

Sorry Kevin I can't find any of those models on the Carrier sites.

I can find a Maestro control but that's as close as I can get :(

[Brian_UK]

Well done Jollycold and thanks.

Also, welcome to the forum.

[kevingrange]

Many thanks. What a load of ***** this bit of kit is. Don't go near one. I phoned carrier and they only made 2.

[Brian_UK]

Many thanks. What a load of ***** this bit of kit is. Don't go near one. I phoned carrier and they only made 2.....and you just had to be the guy to find one of them :D

[BigJon3475]

Some info from a large database for Carrier


http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/