Hi all
I hope someone can help me a bit forward here. I’m the owner of some solar panels which are connected to our 230V 50Hz grid through an Inverter. It’s a Kostal Piko 4.2kW from 2013.
Last summer it suddenly started to give error messages and make shutdowns as soon as the power went slightly up. See picture “inverter_question3”. It’s a bit unknown if there were thunderstorms in the period of time where the fault occurred.
The inverter makes weird sounds before the fault occurs. You can hear it on this video:
It gives these two error codes some time several times a day:
903: system fault – see it here:
241: Over current AC-side.
I thought the IGBT might were causing the faults, but from my simple measurements with my digital multimeter this does not seem to be the case. My plan is to replace all the 6 IGBT´s anyways as I had to cut some of the legs during disassembly.
From Visual inspection there is only one place where a component looks a bit burned. See picture inverter_question2. But I don’t know what this component does and if this is an issue at all.
My question is now:
I hope someone can help me a bit forward here. I’m the owner of some solar panels which are connected to our 230V 50Hz grid through an Inverter. It’s a Kostal Piko 4.2kW from 2013.
Last summer it suddenly started to give error messages and make shutdowns as soon as the power went slightly up. See picture “inverter_question3”. It’s a bit unknown if there were thunderstorms in the period of time where the fault occurred.
The inverter makes weird sounds before the fault occurs. You can hear it on this video:
It gives these two error codes some time several times a day:
903: system fault – see it here:
241: Over current AC-side.
I thought the IGBT might were causing the faults, but from my simple measurements with my digital multimeter this does not seem to be the case. My plan is to replace all the 6 IGBT´s anyways as I had to cut some of the legs during disassembly.
From Visual inspection there is only one place where a component looks a bit burned. See picture inverter_question2. But I don’t know what this component does and if this is an issue at all.
My question is now:
- Does anyone have any ideas of what could cause these faults? Relays-Capacitors-IGBT’s anything? I have attached a picture of the AC-board.
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