Optimiser Australian voltage is 240V @50Hz for single phase ... 415V between phases for 3 phase..

Optimiser Thanks for your post. Interesting that Tasmania is running 230V the same as New Zealand. However ..

It doesn't make any difference with a SMPS, switched mode power supply, as it can handle a very wide range of AC input voltages and provides a tightly regulated output by its design. The way it works is by rectifying the AC input voltage which is stored in a capacitor. A DC supply of 150 to 400V is obtained. Next a high frequency transformer which is small, is switched using "transistors". The output of the HF transformer is again rectified and smoothed with capacitors to obtain the output voltage. Voltage regulation is obtained by feeding back the output voltage to the switching "transistors" which vary the width, PWM, of the DC pulses going in to the HF transformer. Regulation is almost instantaneous but extra capacitance on the output is better. There's limited space in the SMPS for large capacitors.

A 5V switched mode power supply with 5 Amps or more will get you running again. However, contact API to ship you one ASAP.

It looks and sounds like the 12V power supply is cycling on and off. I would suggest you contact Dave brenna98 at AP to arrange a replacement.

The 5V power supply has failed I think. Contact Dave at AP brenna98 for a resolution and I would suggest that a service ticket in opened on the AP website.

The top of the left hand capacitor has a bulging top. It is defective . Stuffed. This power supply needs a new capacitor, 2200uF at 16V but 25V would be better. There's room for a larger capacitor. Check and replace any fuses if necessary.

Harmonics to infinity are definitely great capacitor killers.

Yes, its the RHS one. Same value. Red wires are 5V, yellow is 12V, brown is 48V, black is 0V or the return. Make sure you soder the capacitors the correct way around. The wide arrow on the capacitor with the dash on it is the negative. There are symbols on the circuit board as well.

More on a case by case basis but it wouldn't hurt to have a couple of 2200uF at 25V, capacitors handy. They are fairly inexpensive, a few dollars.
Also I'd suggest a couple of MOSFET driver transistors IRF540N that drive all the coils in the machine. Again, only a few dollars but handy to have.

Low resistance, ESR electrolytic capacitors, ( green colored), are slightly more expensive, have a longer life, but are far superior in handling ripple currents that are in high current sections of a power supply.

Electrolytic Capacitors and Stuff.

Electrolytic capacitors don't like high speed switching. Diodes and transistors.

They dissipate a bit of heat as well because the dielectric is not perfect, electrically. As the dielectric dries out, the capacitance reduces substantially looking more like an open circuit to the rest of the circuit. In other instances you get a breakdown of the dielectric causing an ever increasing runaway short circuit current, causing fuses to blow if present, a bulging can or a small explosion in the can, blowing it to smithereens, and causing much consternation among those present !

To prevent breakdown failure of the dielectric, you can thicken it (higher voltage rating capacitor), increase the surface area between electrodes to dissipate the heat (higher voltage rating capacitor) and prevent it heating it the first place by using dark green capacitors (low Equivalent Series Resistance, ESR) . These guys are great at handling high speed switching with little heat generation and hence longevity.

Hope this helps with understanding capacitors a bit more.