Needed: Air Conditioner Control Unit

[Pat]

I'm having some A/C issues on my early CAV with power going into the Air Con control unit but not going out. Does anyone know where I could locate a replacment or utilize something from a different manufacturer?

 

[Eric]

Hi Veek,

I think that that relay control unit you referenced comes from a Rover.

Eric

 

[Pat]

Thanks so much Eric.

Any idea which model?

 

[Pat]

Re: Needed: Air Conditioner Control Unit Relay

Well, I'm a little farther along. Bench tests indicate the Air Con control unit has a bad internal relay. (It's the black square in the photo). The good news is that it appears to be a common item part number HG4230-005-Z1C. The bad news is that I cannot seem to find anyone that will sell me less than 50 of them. Does anyone know of a retail electronic outlet that does single items?

 

[Seymour Snerd]

Re: Needed: Air Conditioner Control Unit Relay

The good news is that it appears to be a common item part number HG4230-005-Z1C.

Decoding that part number from http://www.tyhhk.com/pdf/HG/HG4230.pdf it's a sealed relay, 5V coil, 12A contact rating SPDT. Dimensions 20 x 16.5 mm, lead spacing 12 mm on one axis, 12.2 mm on the other.

In the Digikey catalog (www.digikey.com) I find a Potter & Brumfield T7C series relay part number T7CS5D-05, or Digikey part PB335ND, that meets all those specs for $1.56.


See http://dkc3.digikey.com/PDF/US2010/P2311.pdf?cshift_ck=null&client_id=5042, figure 2.

I'm pretty sure that's an equivalent but please double-check me on all the details.

 

[Mike Christian]

Good one Alan! It looks like that datasheet has a cross to the one he needs. I am looking at his original and I think it is a 12 Volt unit and not a 5 volt. Veek, you might want to buy the socket and solder that in so that replacements in the future are much easier...

 

[Pat]

Thanks so much for the help and insight. Unfortunately Digi-Key is out of stock of the item but I have some leads on another source.

 

[Seymour Snerd]

Good one Alan! It looks like that datasheet has a cross to the one he needs. I am looking at his original and I think it is a 12 Volt unit and not a 5 volt. Veek, you might want to buy the socket and solder that in so that replacements in the future are much easier...

Yes, the part number in the picture indicates 12 volts: 012 not 005.

Also, FWIW, Mouser (my second favorite source after Digikey) says they have the 5V in stock but not the 12V

http://www.mouser.com/ProductDetail/Tyco-Electronics/T7CS5D-05/?qs=K1bJgWbHFfS4Gccqm8OKZA%3d%3d

Conversely, Digikey does have the 12V in stock, and I suspect that's the one you want.

http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=T7CS5D-12

And finally, favorite #3 Newark has both in stock

http://www.newark.com/tyco-electronics-potter-brumfield/t7cs5d-12/t7cs5d-12/dp/48M8284

http://www.newark.com/tyco-electron...-purpose-power-relay/dp/17M3042?Ntt=T7CS5D-05

 

[Pat]

Thanks so much Alan, I've got two on order along with a really nifty vacuum solder remover.

 

[Pat]

Air Conditioner Control Unit SCORE!!!!!!!!!

It works!!!! Thanks for the help as it led me to find the relay (Mouser part #833H-1C-S-12VDC). I replaced it on the board and she works like new. Cost $1.56!

I will also post a summary on the CAV site for the archives.

Again, thanks for the forum support, especially to Alan and Ian at CAV Canada. It really made the difference.

 

[Pat]

Air Conditioner Control Unit SCORE!!!!!!!!!

It works!!!! Thanks for the help as it led me to find the relay (Mouser part #833H-1C-S-12VDC). I replaced it on the board and she works like new. Cost $1.56!

I will also post a summary on the CAV site for the archives.

Again, thanks for the forum support, especially to Alan, SpyderMike and Ian at CAV Canada. It really made the difference.