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  1. #1
    Join Date
    Oct 2005
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    Clovis,Calif. 93612
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    TRUE GDM coolers with LAE control evaporator fans

    We have been finding a lot of GDM refrigerators with iced up evaporator condensate pans. Also the customers complain about warm product. TRUE is running the evaporator fans to cycle on off with the condensing unit. When we bypass the LAE control and run the fans constantly all problems disappear. I have called TRUE tech support and asked how to program the LAE to run the fans constantly. Their response was ď now why would you want to do that?Ē Do any of you know how to program the LAE to run fans 24/7 thanks!

  2. #2
    Join Date
    Aug 2018
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    https://www.lae-electronic.com/sites...s/lcd32_en.pdf

    Try this link. I believe itís parameter FTC
    The Dept. of Energy came down hard on all of the manufacturers to improve on energy savings. All the manufacturers are going to cycling fans, door perimeter heaters, ecm motors etc. It has been causing issues with Traulsen, Avantco, True, basically all of them. If they donít meet the new energy standards they canít sell the units. And a huge fine if they are pulled and tested by DOE anonymously and they donít pass the standard. So what you will see in the field is intervals between defrosts very far apart especially for electric defrost, evap fans cycling with compressor, mop txv valves, door heaters cycling with compressor. Also ecm motors for condenser and evap fans. Itís just going to get worse as the years roll on and controls are more complex to meet these standards. Next will be inverter compressor or variable speed. Plus the EPA is having them change from 404a and 134a to less GWP refrigerants. So a lot of changes very quickly.


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  3. #3
    Join Date
    Oct 2005
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    Clovis,Calif. 93612
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    Thread Starter
    I agree with you. But if you have a customer with a frozen evaporator condensate pan dripping water inside the box. Or warm product. You got to solve the problem. I realize the factory can’t give the solution if it voids the energy guarantee. What I’m looking for is a kinda dark web hack into the LAE control. Your right,in the end I believe it’s going to come down to variable Speed motors and CO2 refrigerant.

  4. #4
    Join Date
    Aug 2018
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    Well the manufacturers are in a pinch due to this. Thatís why the mechanical controls went away. They arenít efficient enough to make the energy numbers. The customer is the one who suffers in the end. Basically the manufacturers have to send it out to meet the energy standards with the settings like they are. Once the customer gets it it can be changed to whatever the customer wants because they own it. Also the manufacturers are paying out the wazoo in warranty claims to have these changed in the field. Iím already working on R290 units and thatís just the beginning. You will see flammable and semi flammable refrigerants used now because they have a GWP of 0 or close to it.
    I suggest just find out how to make these changes which the tech support should tell you! I used to be a tech support manager for a manufacturer and we kept some things confidential but not how to change parameters to get the customer going.


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  5. #5
    Join Date
    Jul 2000
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    Guayaquil, EC
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    There's no need to get into the controller program, just wire the fans to a constant 115V supply.

    For example, this LAE wiring schematic shows the evaporator fans connected to L1 and L8. Move the wire from L8 to L2.

    Name:  LAE-Controller.png
Views: 80
Size:  26.5 KB

  6. #6
    Join Date
    Aug 2018
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    Quote Originally Posted by icemeister View Post
    There's no need to get into the controller program, just wire the fans to a constant 115V supply.

    For example, this LAE wiring schematic shows the evaporator fans connected to L1 and L8. Move the wire from L8 to L2.

    Name:  LAE-Controller.png
Views: 80
Size:  26.5 KB
    You can do that also, just make sure the refrigerators do not have electric or HG defrost. Which Traulsen has electric defrost on their refrigerators and hot gas on some under counters. If itís air over defrost then yep jump the fans out if you canít navigate the control.


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  7. #7
    Join Date
    Aug 2018
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    California
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    I would suggest a re wire as stated above, I just checked my LAE book from True classes and there are no specifics for that setting.
    This is nothing new with True, for years they have been cycling off the fan on under counter units with a conventional tstat. Customers always complain.

  8. #8
    Join Date
    Aug 2002
    Location
    Southold, NY
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    Quote Originally Posted by icemeister View Post
    There's no need to get into the controller program, just wire the fans to a constant 115V supply.

    For example, this LAE wiring schematic shows the evaporator fans connected to L1 and L8. Move the wire from L8 to L2.

    Name:  LAE-Controller.png
Views: 80
Size:  26.5 KB
    Sure......

    Come up with an easy solution!

  9. Likes Bworth74 liked this post

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