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FAN CONTROLLER QUESTION

Yahoo Message Number: 102708
Hello, my name is Peter Kunasz. We own a 2007 CC Intrigue 45 foot, which was bought new in 2009. I am a photographer and we travel with our German shepherd about 4 months a year.

Here is my question: On a 2007 CC Intrigue, the engine Hyd fan speed is controlled by an electronic controller made by Sauer Danfoss. There are several sensor inputs into this controller unit (this unit is NOT attached to the engine ECM) 1. Coolant Temp, 2. Charged air temp, 3. Air conditioning pressure? Does anyone know how to check if the AC sensor is working properly, and where it actually is? If any sensor is bad, or the controller is bad, the until will default to a full fast fan RPM condition.
Thanks for any information.
Pete

Re: FAN CONTROLLER QUESTION

Reply #1 –
Yahoo Message Number: 102724
Pete,

The head pressure sensor is on the receiver drier. It is called a trinary switch and it has three wires.

George in Birmingham
'03 Magna 6298
George in Birmingham
2003 Magna 6298

Re: FAN CONTROLLER QUESTION

Reply #2 –
Yahoo Message Number: 102729
Yes, thanks. Do you know where that drier is located on a 2007 Intrigue? Also, do you know how to test if it is good or bad?

Pete

Re: FAN CONTROLLER QUESTION

Reply #3 –
Yahoo Message Number: 102750
Pete,

The receiver/drier is a black canister clearly visible and reachable in the opening of the engine bay. It is about 8" or 10" tall and about 4" in diameter. It will have three wires coming from a potted switch at the top.

I have attached a specification for the FDCA 1090411 which is used on the C10/C12 Cats for your information.

Here's how I would trouble shoot the sensors;

    • With engine off and dead cold, focussing on the six wire plug, measure the resistance of the sensors by ohming each adjacent pair on the connector
    • There should be two pair with nearly identical resistance. these would be the cooland temp and charge air temp
    • If there are not two that are nearly the :
    • same your problem is one of the sensors
    • If the temp sensors are good the remaining two wires come from the trinary switch on the a/c receiver drier
    • I would put VOM onto volts, start the engine and put A/C on high while observing VOM reading. See if it chages as you anticipate compressor head pressure rising.
    • If it changes the according to the specs I have attached than it is good. Other wise it is bad.
    [/list]
    The specs are:

      • Sensor 1 is coolant temp
      • Sensor 2 is CAC temp
      • Aux 1 switch is A/C head pressure switch.
      [/list]
      Good luck Pete.

      George in Birmingham
      '03 Magna 6298
      George in Birmingham
      2003 Magna 6298

      Re: FAN CONTROLLER QUESTION [1 Attachment]

      Reply #4 –
      Yahoo Message Number: 102752
      Great information--thanks. Someone else is looking for that as well. I did locate the dryer last night, but my switch has 4 wires coming out of it. Picture attached. I also have a new fan controller next gen model that now has a data cable to measure all parameters via a laptop and SD software, which I also have. Problem is I can't get the diagnostic software to work very well, it will crash after a few minutes and I can't get it to come back. Have to wait till Tuesday to talk with them. But on one hook-up trial both temp sensors looked good, and the AUX 1 had a red square around one test box, which might mean that it was out of tolerance.

      Do you know who sells these sensors besides CC?

      I have a C-13 engine so do not know if your stats are the same.

      Thanks, 
      Pete

      2007 Intrigue

      Re: FAN CONTROLLER QUESTION [1 Attachment]

      Reply #5 –
      Yahoo Message Number: 102762
      I got one shipped to me from Colton Truck some years ago. I suspect they  may be more widely available, but I do not know exactly who makes them. It might  even be a NAPA item for all I know.

      Rich 2002 Magna

      Re: FAN CONTROLLER QUESTION [1 Attachment]

      Reply #6 –
      Yahoo Message Number: 102763
      George. Thanks. There is no voltage spec for Aux 1 in what you sent. Only  milliamps. BTW, can one change out that trinary on the air drier without losing  the refrigerant?

      Rich 2002 Magna
       

      Re: FAN CONTROLLER QUESTION [1 Attachment]

      Reply #8 –
      Yahoo Message Number: 102774
      Rich,

      I don't know the voltage spec for the aux 1 switch. My suggestion is to test for voltage change as head pressure rises. If the voltage changes then the odds are that the trinary is good.

      The trinary cannot be changed without losing the refrigerant. Also, I believe the trinary is no longer available from Evans TempCon. They have a binary switch to replace it but I don't know the implications to wiring.

      George in Birmingham
      '03 Magna 6298
      George in Birmingham
      2003 Magna 6298