Mondial 3.2 Blower/Fan Speed Control Replacement with PWM

Steve Magnusson in the TR section will be able to answer your questions. TR has the same system and I believe Steve is an EE. He knows the electrical system better than anyone here.

If indeed you get this done it will help a bunch of Ferrari owners.

 

https://www.ferrarichat.com/forum/members/steve-magnusson.260/

Send him a message.

 

Send me some money .

What version 3.2 Mondial? US or euro or CH or ? (Not sure that it matters for this system, but it's best to be clear).

You almost don't really need to know what any of the wires connected to the stock speed controller, 61, do as that Amazon motor controller would replace the speed controller 61, the power transistor a, and the full speed relay c. I.e., all you need to do is supply the existing (big) +12V power and ground to the Amazon unit, and then hook the motor up to the Amazon unit. An additional concern would be cooling that Amazon unit. Ferrari tries to address this by mounting the power transistor in the airflow stream from the cabin blower. I don't see an internal cooling fan in that Amazon unit, but, even if it had one, if you just buried it in the center tunnel = probably wouldn't be good. If you can find a place to mount the Amazon unit where you could add a small external fan to cool it, and there was a reasonable airflow path for that added external fan to draw in cool air and then blow out the hot air to somewhere else = then you could proceed. Let me know if you can address this cooling issue, and I'll post a mark-up of how to wire it in (although, once I look at it, there may be other issues as there is other stuff to automatically run the AC occasionally to defrost the inside of the windshield when using the defroster warm and that may impact things).

 

Can't agree with that -- look at all the finned heatsinks inside and the perforated outer metal case. It is disappointing that there's no specification/data sheet in that Amazon ad -- if you have one please post (or a link).

Don't follow you here -- pin 1 and pin 6 on the speed controller, 61, are the same GV wire. When you actuate a pushbutton (other than STOP) on item 60 = the GV wires on pin 3 of item 60 are connected to pin 1 on item 60 (ground). It does go elsewhere for other uses, but the bottom line is:

STOP pushbutton pressed = GV wire is nothing

Any other pushbutton pressed = GV wire is ground

 

OK, you know best -- I'll go away. (I'll repeat: that Amazon motor controller would replace the speed controller 61, the power transistor a, and the full speed relay c -- not just the speed controller, 61).

 

Yes, that would be the general strategy, but you can't use control pin 1 (the GV wire) directly as the negative to provide a huge current to the PWD input -, nor the control pin 3 directly as the positive to provide a huge current to the PWD input +. -- their wiring and switch inside item 60 can't support huge current. You need to use the same large wires that presently supply + and - to the blower motor system for the PWD input + and -, and add a relay into one of them such that when the GV wire is ground = it closes the relay and makes the connection, but when the GV wire is nothing the relay is open and the Amazon unit is "off".

 

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If that is the size of the unit I am not sure in the air ducting is a good idea. It would restrict airflow. Under the console has little airspace. In the foot well or in front of the firewall seem like better choices.