Dear friend
Please help me fix this problem .
My auma ac 01.2 fault IE 24V AC, i found this fault in relay board Z043.590/05-05 .
I have renew relay board and fix this problem .
But i don’t know which one make this problem “ IE 24V AC” in relay board .
Please if some one know this fault and already fix this not by renew relay board .
thank you so much and best regard al

 

Check the wiring supplying the 24V AC to the relay board. Look for loose connections, and damaged or corroded wires.
Also, check the voltage drop across the wiring.

 

Check the wiring supplying the 24V AC to the relay board. Look for loose connections, and damaged or corroded wires.
Also, check the voltage drop across the wiring.

Thank you for your help
1. Wiring supplying the 24v ac to relay board is good ( not loose connections ) all in good condition.
2. Voltage not drop so much cross the wiring .
I renew relay board , working fine . But after return old relay board . This problem again.
So i thing some one in relay board have problem . And i don’t know which one .
Please tell me if you know about this problem .
Thank you so much .

 

Your new board has some sort of grey paste around the base of the electrolytic capacitors. Is that intentional?
Unusual for printed circuit boards.

You might check the voltage across the electrolytic capacitors when powered. Then when with outpower, check their resistance with an ohm meter in both directions by reversing the meter probes.

 

Your new board has some sort of grey paste around the base of the electrolytic capacitors. Is that intentional?
Unusual for printed circuit boards.

You might check the voltage across the electrolytic capacitors when powered. Then when with outpower, check their resistance with an ohm meter in both directions by reversing the meter probes.

Thank you Dave
The grey paste around the base of the electrolytic capacitors from factory , is that intentional.
I will try to renew all capacitors and feedback to you . I hope this problem from capacitors , i am not sure which one but i will renew all.
Thank you and best regard

 

Your new board has some sort of grey paste around the base of the electrolytic capacitors. Is that intentional?
Unusual for printed circuit boards.

You might check the voltage across the electrolytic capacitors when powered. Then when with outpower, check their resistance with an ohm meter in both directions by reversing the meter probes.

Dear Dave
After i renew all the electrolytic capacitors but this problem still “IE 24VAC” show on screen .
So this problem not from electrolytic capacitors.
Thank you so much .

 

I have the same problem, what should I do, my friend? 24VAC

 

AUMA calls this part the Control Board. AUMA USA will only recommend replacing the entire board stack assembly, and does not recommend repairing the individual PCBs.

When I experienced this issue, I tried to replace the power supply thinking the 24VAC was not getting transformed properly and did not have success. The customer replaced the whole AC01.2 Controller in the end.

There must be some sensor monitoring the 24VAC, and perhaps it is the failing part, not giving proper feedback.

This wiring diagram is the most detail you can publicly find for this board.

 

I changed the capacitor 22uF, 50 V on the relay board, now everything is fine, the error is fixed. Check the capacitance on the card, it should be around 22uF.

 

Hello,

You can spot bad capacitors by looking:
https://www.robotroom.com/Faulty-Capacitors-1.html
They can be bulged or leaking.

Bertus

 

These Vishay capacitors have an aluminum housing and it is difficult to notice that they are damaged. They look like new, but they do not have the required capacitance.

 

AUMA calls this part the Control Board. AUMA USA will only recommend replacing the entire board stack assembly, and does not recommend repairing the individual PCBs.

When I experienced this issue, I tried to replace the power supply thinking the 24VAC was not getting transformed properly and did not have success. The customer replaced the whole AC01.2 Controller in the end.

There must be some sensor monitoring the 24VAC, and perhaps it is the failing part, not giving proper feedback.

This wiring diagram is the most detail you can publicly find for this board.

View attachment 4618

Thank you bro

 

Hello,

You can spot bad capacitors by looking:
https://www.robotroom.com/Faulty-Capacitors-1.html
They can be bulged or leaking.

Bertus

I testing all capacitors and all is normal . But problem still show” ie 24v ac “.

 

These Vishay capacitors have an aluminum housing and it is difficult to notice that they are damaged. They look like new, but they do not have the required capacitance.

Thank you bro . I change all capacitors but not yet change 22mu50v . So i will try to renew it and feedback to you. I hope cam fix it like you done. Thank you so much .

 

I changed the capacitor 22uF, 50 V on the relay board, now everything is fine, the error is fixed. Check the capacitance on the card, it should be around 22uF.

Thank you bro, i will try anh hope same you done it. I will feedback to you after all .

 

Thank you bro, i will try anh hope same you done it. I will feedback to you after all .

Hi bro. I have problem same you. Did you change the capacitor 22uF, 50 V? Can you feedback result?
Thank you so much.

 

Hi bro. I have problem same you. Did you change the capacitor 22uF, 50 V? Can you feedback result?
Thank you so much.

I change this capacitor but not yet fix this problem , i thing this have so many non polarized capacitor also , so the best way we change new control board .
thank you all bro .

 

I change this capacitor but not yet fix this problem , i thing this have so many non polarized capacitor also , so the best way we change new control board .
thank you all bro .

Thank you, bro