Thread: Tips for Newbie Huanyang VFD users

Thank you

Originally Posted by SAISAY

So we found out

I think this reveals one of the issues people face when attempting to commission what is essentially industrial equipment - most domestic sparkies simply don't have the knowledge or experience to understand how to hook them up, or diagnose problems.

The input stage to VFDs (and inverter aircons and all manner of modern switchmode devices) is fundamentally simple - just diodes and capacitors. Once you understand this, the fact that there wasn't a "T" terminal after the "R" and "S" is irrelevant, just as whether you should connect each of the active and neutral to specific R or S (or T) terminals is irrelevant. A sparky with experience with industrial drives would also understand what the P, Pr and N terminals are there for.

I totally agree with you
I expected the inverter and spindle to be plug and play like a router, hence I had all these problems

I got a bit upset when someone on another forum suggested the sparkies were incompetent.
Up here we do not have much use for industrial equipment, sugar harvesters and banana sorters are very simple set-ups and the guys in the mill do not do private work.

When the house was built, we had a different contractor and I had to pull him up on mistakes he made, such as the light switching on with the fan switch and the fan with the light switch, putting white powerpoints on silver tiles and putting the switches on the hinge side of the door instead of the handle side etc. etc. and then telling me he didn't know who did it.
Fortunately, I was taking picture,s every day of the construction process so I could prove he was lying.
Guess what, his boss was not impressed with the extra expense of rectifying the mistakes.

light switch on the wrong side is builders fault , at some time on the block layers plan the door was swung on the opposite side , and the electrical plans were never up dated , see it all the time , the siver cover for the power point would have been an extra for the builder

Housing Sparkies have absolutely no understanding of basic logic lol , and, or, nor, nand, xor ,< basic logic

Originally Posted by SawDustSniffer

Housing Sparkies have absolutely no understanding of basic logic lol , and, or, nor, nand, xor ,< basic logic

The only reason that they would need this understanding is for a two way switch. And even then they don't need to understand it, just be able to wire it up.

ps. lol is not logical (Quote from Mr Spock)

Originally Posted by SawDustSniffer

light switch on the wrong side is builders fault , at some time on the block layers plan the door was swung on the opposite side , and the electrical plans were never up dated , see it all the time , the siver cover for the power point would have been an extra for the builder
I disagree, the plans were correct, he misread them. This is a timber house not a block house with glass sliding doors front and back and the doors were in place.
Housing Sparkies have absolutely no understanding of basic logic lol , and, or, nor, nand, xor ,< basic logic
Why should they, they have no use for it? This is a farming community not an industrial one

When I had my license, far too many years ago to care, there was no such things to know. Computers were still in their infancy and the language was BASIC and HEX.

Can anyone help me?

I recently bought a Huanyang HY03D023B inverter, which is a 220v input 3.0 KW output VFD.

I could not get it to work, and told the supplier in China that it was a dud. After many days of measuring and them assuring me that it was a minor problem that they could fix easily, they finally said that they couldn't fix it and that they would send me a new inverter (I have to pay another $35 freight.

The thing that is wrong with it seems to be no voltage at all on the output side. It measures very high resistance between all output terminals:
The resistance measurements are:
U-V = 4.7 Megaohms (4M7)
U-W = 12.44 Megaohms (12M44)
V-W = 4.82 Megaohms (4M82)

and then, when power is applied:

Measurements across the U-V terminals was 10.6v, Then after pressing start it was 11.1 then after pressing stop it was 10v

Measurements across the U-W terminals was 4.3v, Then after pressing start it was 4.0 then after pressing stop it was 2.6v

Measurements across the V-W terminals was 8.5v, Then after pressing start it was 8.3 then after pressing stop it was 10.6v

As soon as I press the start button I get a fault dL which according to the manual is an output short circuit.
Their suggested course of action for this fault is:
1) Check whether the connection wire of the motor has a short circuit. (The motor is not connected)
2) Check whether the insulation of the output wires is good. (No output wires attached)
3) Send for repair.

So, does anyone have a circuit diagram for this inverter, or better still can anyone advise me what component has failed?

The manual also says that the VFD is fuse protected. I cannot find a fuse anywhere in the box.

Your replies would be much appreciated.

try running the unit without the VFD and see if you get the fault. if you don't it implies the cable of VFD is the issue

Hi Mike
I attached the new spindle to the old small VFD and it spins up fine, so there is nothing wrong with that.

The problem exists without anything (other than power) attached to the inverter.

Originally Posted by Bob Willson

Can anyone help me?
I have to pay another $35 freight.

Why do you have to pay freight when the thing is faulty???
Me no unnerstan.

technically he would have to send it back so paying freight either way is just going to happen. at least he keeps the unit

Originally Posted by seafurymike

technically he would have to send it back so paying freight either way is just going to happen. at least he keeps the unit

Correct

If they are replacing the unit....dont bother playing around unless your experienced in these type of electronics.

Well if somebody who is experienced in VFDs could tell me what part is likely to be damaged, then I would just desplder that and then test the part. If it is faulty then replacing that part would either fix it (in which case I would be a few hundred dollars in front) or not, (in which case I would be down the cost of the componentry I purchased (assuming I don't already have the parts in stock))

It would be great to have a spare inverter.