You saved the customer a lot of money. Great fix

Dude, you are my role model! I do hate these VFDs as well! I don't like EEVs on refrigeration equipment either! Converted HeatCraft (Beacon II) freezers with those EEVs to TXV/Defrost timer set ups and now it runs trouble free!

Great video brother keep them coming love them wiring videos 🙌🏻🙌🏻🙌🏻🙌🏻🛠⚙️⚒️

Great video tutorial 👍♥️ thank you for sharing your knowledge ♥️🇵🇭

You save the day brother thank you very much! 😮‍💨👌 very helpful 🫡

Very interesting ... Thx for sharing your knowhow ...

Eric B. East China, Michigan. Love the information. Thank you. Much appreciated.

Thanks for sharing this video

Great video brother 💯💯💯💯

Great review Looking Good 😉

great video !! also i love those 701tstats haha

Great video man. I have a york that I can't get a replacement VFD on and york was telling me I needed and auxiliary relay on top of the contactor. So this was dope to see you just ran it to g and c on the UCB 🤘

Great vid

Good job 👍🏾

You got a new member!

Marco from New York thanks for that info now if I pass through a issue like that I can do that and still order the variable frequency it takes a couple of week🤑🤑🤑🤑

Good stuff

The cables that connect to the board terminals are those that connect to those of the thermostat

Thanks!

You can use some micro relays (finder) with the contactor combined with the VFD to make a transfer switch from vfd to contactor when the vfd fails

Nice 💪

The company I work for, our units have an Entouch thermostat. It would have to be programmed by management. I have trouble when you get a power blip and loose a leg for a second. The VFD faults out and the unit stops working. I have to drive out just to press the stop/reset button on the drive. Very aggravating.

Do the other ends of the wires from your 24 v coil connect to the control board harness?? I see smaller gauge from control board angle.

A motor starter with overloads would have been a better choice?

With that thermostat set to electric, is there a fan delay when (gas) heating turns on?

Have a carrier with vfds for blower fans and it gives an error of f5 fan running out of control. Would your fix work on this?

I'm not a fan of York equipment in general, but wondering if you have any tips for placing temperature probes for superheat/subcool in package equipment (especially Yorks), because it is so dang hard to reach into the compressor compartment in some of their older equipment!! Thanks in advance from Nashville!

Thanks for explaining switch gas to electric I was thinking how to do it before you explained

saludos amigo

VFD's can be tricky, if you have like units , I would have swapped parts to find the issue, a fix could possibly just been reconfigure a few settings?

What if the Rtu is on EMS? Dont have thermostat terminals

A beautiful York 👀

I just came across this video and I'm going to tell you a few things that will help you in the future. Point 1. The reason you are having a difficult time with the VFD is most likely you have a high leg. The VFD doesn't like this. It will run for a while and then decide to lock out. VFD's don't work with a high leg of power. Point 2. You didn't have to run power from the G terminal and common. You also didn't have to switch the T-stat to Electric. If you read the schematic, there is a relay in the top left side of the control panel. It's a clear relay with a normaly open set of contacts and a 24v coil. That's the low voltage power to the VFD. It's energized on a call for heat or cooling. Simply remove the 24v coil wires from the relay and put them on your contactor. Mount the contactor in the control panel. The control wires are long enough to reach the new contactor. I put a 2x4 box with cover in the blower compartment to connect the motor wires.

Thanks for the content watching from cincinnati So do throw the Tstat in gas or electric after? Is this the most common vfd?

Thanks for this video--it got me wondering about something I watched. I noticed quite a few HVAC units (3 phase rooftops) with VFD have contactors between it and the compressor(s) and I was wondering why. Old school when I did it, but a contactor between a VFD and its motor was a big no-no. If the motor is not always connected, features such as DC boost, soft starts, frequency ramping, etc. all or most of that is not available with a contactor in the circuit. Is the VFD limited in what it can do and needs a contactor? I watched an HVAC tech service a 3p Lennox rooftop on KZfaq and I was confused. A VFD drove three compressors through three contactors. I am guessing that the VFD provides a bit of energy savings and possibly some monitoring, but little else?

Taddy helping me make money and my customer save money/heartach

I keep a 3/4 & 1 hp 230V blower motor, relay, cap for my 4 & 5 ton vs ah's.

So when the part comes in will you put it back in service, since unit has multiple stages or looked like it did?

what happens when the thermostat calls for heat?

What did you do to the vfd control voltage did you unplugged the black and yellow wire?

Dear Tad! What an incredible video. I live in South Florida and my VFD blew and my a/c tech told me they are on back order for months. My room is hot and I can not stand the heat. I have a trane variable speed 4TTV8036A1000BA. I understand what you did on this unit and wonder if I can do it on mine. I have not opened up the unit well but I wonder if it would fit the contactor within the space? Do you know this unit? Bill

I doubt if that motor has internal protection ; protection is through the VFD so the contactor leaves it with no overload . An IEC style with an overload block would be much better even though it’s 250 vs 40 ; finding the problem ( probably high or unbalanced voltage ) would be lots better than treating the symptom. Had to do this in places where voltage was 480-490 and drive on smaller equipment was only configureed for 460. Not being negative , just practical.

Looks nice but i would have added a motorprotection after the contactor

Shouldn't the fan run at about 25 hz when there is no call for cooling for fresh air requirements and when compressors come on in cooling mode the vfd should ramp up to 60hz i thought, with the contactor installed it appears to only turn the fan on in cooling mode.

Some times fvd fail cause the belt is too tigth or too loose. That is the situations that I have seen

Looked like your vfd had an enable signal wired. I think using that for your contactor coil would have made things a little more plug and play. Did you just not notice that or was there some other factor?

Hold on. The thermostat doesn't send the signal in heat. That is done by the blower limit. You have to wire the relay in. Setting the stat to the electric heat, the blower shuts down immediately after the call for heat. Also, you gotta let the board know that it is single speed instead of vfd

Hey Tad did the vfd display a code when in alarm?

We're is black and brown is connected to, coming out the 24v plug????

Instead of changing setting on thermostat from gas to electric, could you have left it on gas and simply put a jumper between w and g?

What was wrong with the VFD? What error codes did it give you?

I did learn something don't buy York with micro coils.... or vfd garbage

I don't understand why would you do that, if the vfd is failing just replace it. Its an electronic device at last

This'll work for any vfd?