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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 “ now why would you want to do that?” Do any of you know how to program the LAE to run fans 24/7 thanks!
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https://www.lae-electronic.com/sites...s/lcd32_en.pdf
Try this link. I believe it’s 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 don’t meet the new energy standards they can’t sell the units. And a huge fine if they are pulled and tested by DOE anonymously and they don’t 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. It’s 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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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.
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Well the manufacturers are in a pinch due to this. That’s why the mechanical controls went away. They aren’t 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. I’m already working on R290 units and that’s 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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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.
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Originally Posted by
icemeister
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.
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 it’s air over defrost then yep jump the fans out if you can’t navigate the control.
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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.
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Originally Posted by
icemeister
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.
Sure......
Come up with an easy solution!
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