Washington Need help with blower settings for the Aurora Base Control board

Discussion in 'Maintenance and Troubleshooting' started by David Such, Mar 24, 2017.

  1. David Such

    David Such New Member

    I would greatly appreciate help with configuring the Aurora board to achieve a lower setting for the blower speed. I have carefully read the "ECM Configuration Mode" section in the Water-Furnace 5 Series (500A11) manual (p. 32). However, not being a skilled technician, I need a bit of clarification on those instructions. Actually, a more detailed step by step list would help than what the manual offers.

    1. As I understand it, I begin by pressing the SW1 Switch for 5-10 seconds. After that, how do I select the ECM Configuration? Do I press the SW1 switch again, or what exactly?

    2. Also, once in Configuration Mode, the LED2 will flash each of the 12 possible blower speeds 3 times. Does this mean, that for a desired airflow setting of 5, I wait until the LED2 with flash 5 times and then I press the SW1 switch to lock it in? Does it cycle through all 12 settings 3 times in a row? That part is a bit confusing.

    3. Then do I need to select high or low speed blower selections? If so, how exactly.

    4. If for some reason, I make a mistake during the programming, is there a safe way to return to the beginning of the programming sequence?

    Thanks kindly for your help in advance.
  2. geoxne

    geoxne Active Member Forum Leader

    Are you sure you have the ECM fan? Is there a reason why you want to change blower speeds? It is not recommended unless you know what you are doing.

    I have never done it manually on the control board, only with an AID tool. However, from what I understand once you enter ECM configuration mode you must enter all 3 speeds in order Low (fan only), Medium (1st Stage), High (2nd Stage). The red and green leds will tell you wether you are working on L, M or H per installation manual.

    When you are NOT in ECM configuration mode the yellow led flashes out the current configured speeds in sequence. Record those before you start so you can go back to them if you have to.

    Yes, after the yellow flashes the #speed you want to set.
    Once in configuration mode select Low # then Medium # then High # to complete the process.
    No. You will have to start the process all over.
  3. David Such

    David Such New Member

    Thanks very much for your reply. The reason for my wanting to change speeds is because at the current speed (at 7) the volume and force of air through the ducts are loud and they cause the metal ducts to make noise as if they are wobbling. I did talk to tech support at Water Furnace, and they said it is safe to go as low as a setting of 5 but no more for my unit. I am not sure what I am doing yet. It seems like a case of pushing the right buttons to get to the desired setting. But I do see it is somewhat complex doing it manually. I may give up and get the furnace guys out here to do it.

    Anyway, one last question. From what you say above, it seems that I have to set the blower speed for each of the 3 stages. Is that correct?
  4. geoxne

    geoxne Active Member Forum Leader


    Also, as final warning, high voltage lurks within.
  5. David Such

    David Such New Member

    Thanks again for your reply and justifiable warning. I will give this some more thought.
  6. Thom Moore

    Thom Moore New Member

    I've been struggling with the exact same issue for a Waterfurnace 5 Series setup. This procedure seems to be off-putting to the service techs I've had doing annual maintenance and they don't ever complete it when I ask about it. So perhaps I'll work it myself eventually.

    I'm still not clear from the conversation above how to determine which stage of operation (Stage 1, Stage 2, Aux. Heat) I'm setting the blower for. Does it go through them sequentially or is there a selector?

    Just to check something: does it seem reasonable to have a lower blower setting for Stage 1 operation than for Stage 2 operation. Seems like that would reduce the noise for the majority of operations to maintain temperature, and also raise the temperature of the air being circulated to be closer to that for Stage 2 operation. The heat exchanger should not get any warmer than it does for Stage 2 operation unless the blower is turned way down.

    Thanks much for this and any additional light shed.

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