HVAC Control on Car PC through Serial Port. - Page 33

h3rk · 03-05-2007, 08:59 PM

Aside from the difficulties with mounting the circuit card to anything, which I brought up before I purchased it, it looks pretty well designed. I did have to do some work to fit the pins on the pot into the holes, but that's really nothing. Thanks.

snapperhead · 07-25-2007, 11:16 PM

Ok, as you can see I'm new here. Reading over the threads on hvac control it looks like Mastero is the one for the board and software to do this, and to read farenheight I found the statement below.

"If you want F then i suggest using LM34 with the current setup it will display the temp in F but 99 is the max deg it can display."

How do I do this.. Im not following this statement.. Mastero can I get this board ready to roll reading 2 digit farenheight and shipped to the us.

Thanks.

Vince

snapperhead · 07-26-2007, 08:37 PM

ok I've been reading up and got it now. Thanks for this forum.

soeren72 · 07-28-2007, 02:27 PM

It looks like the board is supplying the compressor directly with DC ?

Does the low pressure guard still work ?

Thanks
Soeren

Mastero · 07-29-2007, 03:12 PM

The guard will work if you put it after the controller...

Cheers
Mastero

Mastero · 07-30-2007, 06:33 AM

ok working on the F version ... should be out soon ...

Should it be with three dig display or two will be ok meaning max 99 deg F display

Mastero

RedGTiVR6 · 07-30-2007, 08:21 AM

personally, a good chunk of the US would find 2 digits useless.

I know I would.

Durring most summers (not this summer though...strange), it will be over a hundred on a regular basis. Honnestly, after reading above that there were only 2 digits, I was a bit dissapointed...just my two cents.

Mastero · 07-30-2007, 02:12 PM

Ok then it shall be three digit and Farenheight. any thing else ??

Mastero · 07-31-2007, 03:14 AM

60deg f shall be min and max shall be 86deg f is this ok ?

RedGTiVR6 · 07-31-2007, 07:39 AM

It's fine for us down here, but I'd want to hear from those up north since it gets quite a bit colder up there.

Mastero · 07-31-2007, 01:40 PM

Good news !

Got the farenheight thing working ! So now we have two models C and F.

The 60 and 86 is for the ac compresor cutoff only.. heat can be incressead by opening the heat servo vent

Cheers
Mastero

Mastero · 08-01-2007, 03:48 AM

Ok got it done new price and avalible in two models C and F

Comes only assembled now.

enjoy
Mastero

RedGTiVR6 · 08-01-2007, 09:30 AM

Ok - this is pretty sweet! I'm printing off the manual right now and going to read over it to write out some questions....because just reading it briefly, I already have a few.

helllordkb · 08-01-2007, 10:17 AM

it may have been posted here already, im not sure i have been watchign this thread and considering it for a while. My only question is how to go about mounting the servos you connect to the Aircon to the actual mechanical control switches. cause the servo is moving that switch as if i was, correct?

RedGTiVR6 · 08-01-2007, 01:02 PM

Ok - so here's a list of questions. I know this is a pretty long list, but I just want to have all my ducs in a row before diving into something like this.

Regarding the servos, I'm gathering that this set-up is designed to control the servos that are already in the HVAC system?
Do you happen to know if VW uses 5v servos? I'll see if I can check on this, but if you happen to know off the top of your head....
Does the piece come with the temp sensors? My car already has an internal and external temp sensor (external in the front bumper, not sure about internal, but I'm sure I can find out). Would I be able to just tap into these existing sensors or do I need to replace them with the sensors that come with this kit?
What kind of current capacity does this thing have? What size fuse should the main board be fused with? (Wondering if we'd be able to tie into the factory fuse for instance)
It looks like when you open the software, then it defaults to fan speed one. Can you set it to open back up to the setting it was on when the car shut down?
In the manual, it talks about how the HVAC will become functional once it's started. Is it then safe to assume that you just have it start-up with the PC (put it in the start-up folder)?
In the manual, it states: The fan shall go to the auto mode only when this button [AC] is on. Is there any way to over ride 'auto' mode? Or is this statement accurate? The fan cannot be put to auto unless it's on AC. What if I want the AC on and I want it on high? In other words, I want the AC on but I want manual control of the fan speed?
I see later on in the manual where the system will automatically cut off the compressor once the desired temperature is passed by 1 degree (C or F?) Is this why the AC setting automatically goes to 'auto' mode?
On the controls, there's heat up/down and temperature up/down. Is this to say that heat up/down is only for heat and that temperature up/down is only for air conditioning?
Heat is achieved by just letting the heat that the motor generates back into the cabin, correct?
How does the unit shut-off? I don't see an ignition lead on the diagrams. Would you use 'A' as a switched ignition source and 'H' as a 12v constant? I don't want this running at all times with the car off. For instance, if something malfunctions, I don't want it to fail to on and have the HVAC going while the car is off.
What's up with the two connectors on the board Display and PC? So then is there a seperate display that's avaliable to use? Where does this display plug go do?
What are the current capacities of the fan output relays?