Hi @Neilmcleod
It can help sometimes when this issues (blue blinking light → yellow blinking fast) appears.
You will see in next days if it is working fine again.
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Hi, yesterday the unit started showing a flashing blue light despite the tray not being full and would reset to solid blue. During this time the unit would sense cat activity and rotate. I recalibrated the DFI but the fault remained. This morning I noticed that the unit had not cycled following cat activity. I reset then cycled the machine but when I pressed reset at the end of the cycle, I am now back at the flashing blue/rapid flashing yellow problem.
Hey @Neilmcleod
This would probably mean that there is an issue with DFI sensor.
Is your robot still in warranty?
Thank you.
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No the warranty expired earlier this year, but the dfi sensor was replaced towards the end of last year so either it isn’t the problem or the replacement has failed very quickly.
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Unfortunately we had situation where DFI sensor would fail within one year of usage.
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Hi,
The weakest link of this device is the dfi electronic card. the most common fault is dfi card failure. Dfi cards works in an acidic humid environment. If the robot is working again after being turned off for a while, this means the dfi card is not completely dead and there is a short circuit triggered by moisture and rust on the dfi electronic board. The reason for this situation is that moisture and rust are conductive. The IC legs on the electronic board are very close to each other and the rust that starts in any of the legs contacts the other leg over time. This contact should be avoided. The legs of the ICs are very close together and the rust may be too small to be seen with the naked eye. Rust needs to be gently removed under a magnifying glass without damaging the electronics. Alcohol and toothbrush are suitable for rust removal. After the rusty area is cleaned, rusting starts over time in humid working environment. For this reason, the rusty area should be isolated from moisture and electronic card protective transparent acrylic spray should be used.
Hi, I have looked at the cards. The coating on them seems to be intact and even under a magnifying glass, I can’t see any breaks or corrosion.
I don’t know what to do now, the unit does not work at all as it simply alternates between flashing blue and rapid flashing yellow.
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So will I have to pay even although its a new part?
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Unfortunately yes, since the part is more than 3 months old.
Hello there. The solution I propose is to repair simple and visible short circuits. Clean the dfi board carefully with alcohol and remove the rust. If it still doesn’t work, there’s nothing you can do. You cannot repair the dfi card. in this case, the only option is new dfi card.
Before using the new dfi card you bought, I suggest you cover it with transparent nail polish. except IR LEDs
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can you see anything wrong?
Hello @Neilmcleod ,
Thank you for your reply.
There is no visible damage on the boards.
Did you check if the IR LEDs are working properly?
Have you tried to clean these circuit boards with alcohol?
Awaiting your reply.
Sincerely,
Hello
Can you send me a very close photo of the U1 legs on the emitter board? 10 very close legs
the photo of the legs that I showed you with the arrow in the photo I sent you. on the emitter card
hello there seems to be a short circuit between the legs due to corrosion. Carefully clean the 10 legs. use pure ethyl alcohol and ear cleaning sticks. isolate the legs from each other. it should be like the legs on the other side. then mount the device