What does your meter read if connected between +5VSB (purple wire) and COM?

 

Black and green are connected together and fans are off. From refrig comes out three sets of red and black wires. One set for small fan, big fan and peltier. All should be connected correctly.

 

5.06V

 

Black and green are connected together and fans are off. From refrig comes out three sets of red and black wires. One set for small fan, big fan and peltier. All should be connected correctly.

Do you get voltage on the yellow wires without the fridge connected?
Do you get voltage on the other outputs, e.g. orange wires (3.3V

 

Sounds like it's in shutdown mode, disconnect the fridge, and power it up again.

 

I haven't come across this but is it possible that PS_ON should be grounded after the PSU is turned on (i.e. not connected when power is applied to the PSU)?

 

PS ON should be at GND if the PSU is to be ON.

 

PS ON should be at GND if the PSU is to be ON.

Yes, indeed.
But should it be pulled low only after the power is applied.

 

Nope.
When I test them after repair, I sometimes ground PS-ON and power up.
The things is the main PSU will come online after stby is ON, so it's not a problem.

 

Nope.
When I test them after repair, I sometimes ground PS-ON and power up.
The things is the main PSU will come online after stby is ON, so it's not a problem.

OK. I've never tried powering up with PS_ON grounded so I ws just wondering if that was the problem.

 

Nope, it's not a problem.
Could be the loading is too much or not balanced to a minimum required value on 12V and 3.3V

 

OP should connect all black ( or 2 blacks ) and PS-ON together, serves the fridge GND.
Connect all yellows together, serves as the fridge +12V

The PSU should start as power is applied. PSU fan should run.

 

OP should connect all black ( or 2 blacks ) and PS-ON together, serves the fridge GND.
Connect all yellows together, serves as the fridge +12V

The PSU should start as power is applied. PSU fan should run.

Okay. I have now tried few things and above don't work but if i connect 2 blacks to refrig ground and 2 yellows to refrig +12v and then turn power supply on and then connect PS-ON to blacks then all 3 fans try to move but move only 1cm. Nothing else happens.

 

Okay. I have now tried few things and above don't work but if i connect 2 blacks to refrig ground and 2 yellows to refrig +12v and then turn power supply on and then connect PS-ON to blacks then all 3 fans try to move but move only 1cm. Nothing else happens.

That indicates the main supply is tripping out.
Assuming that the fridge needs less than 30A (does it?) and all wires other than those you mention are unconnected then try this with the fridge not connected to the PSU.

 

Specs say this refrig requires 12V 6A.

All other wires was unconnected.

I now connected 2 black wires together and 2 yellow wires together but did not connect these to refrig and then turned power supply on and nothing happened. Then connected green to black and power supply fan tried to move again.

 

Then I fear you have a faulty power supply.

 

Dustbin time I'm afraid...

 

Check if the PSU runs just by connecting PS-ON to GND with everything else disconnected.
If it does not, scrap it and find another

 

Is it possible to use car battery charger? Product like this: box says 12V / 4,2A but box has also big 6A and spec says: 6A 12V 230V ?-45Ah. What’s the difference between 6A and 4,2A. Refrig needs 6A.

Or can i wire two regular 12V 3A power sources together? Similar ones which comes with HDD…? Thanks

 

I tried one old working car battery charger but i think this was too fancy so i didn't get any power out of it.