Help with broken/ smoking HY02D223B VFD on Openbuilds platemaker

[m_c]

Jazz, that looks like a standard wire wound resistor.
I'd guess it's the residual charge drain capacitor, or possibly the over-voltage dump resistor. I'm also wondering if the relay next to it, is part of the same circuit.

The blue discs near the main terminals are more like thermistors, but capacitors also come in that kind of package.


If it was the residual charge drain, I wouldn't expect it to stop the spindle if it had gone pop, which is why I'm wondering if that relay next to it is related, because if the relay had failed, it may cause the resistor to have been connected for longer than it should be.
If it was for over-voltage, a wiring fault to the spindle might have caused a voltage spike, and caused it to fail.

Although, I'm wondering how the VFD is being controlled. The high-voltage wiring leaves a lot to be desired, so is the VFD being controlled via the control panel/low voltage terminals, or is it continually being power cycled via the mains input?

[JAZZCNC]

Jazz, that looks like a standard wire wound resistor.

To be honest M_C I didn't notice the pictures, I'm just going off experience from having one fail on me and knowing a couple of others who had the same failure. Those were the round-type Thermistors and they did stop the VFD from starting. But to be honest, this was quite a long time ago now, at least 6 yrs ago and the newer Huanyang VFDs we fit now are much better made and those pics do look different from the one which blew on me so you could very well be correct.
Also, I haven't had an Huanyang VFD go faulty now for at least 4yrs and I've fit over 40 sets just in the last 12 months and probably 200+ in the last 5yrs, so I'd say they are fairly reliable now.