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My 12000 watt AGM has been a paper weight , I have followed Powerjack recommendations replacing the mosfets , the control board etc same result , I was wondering perhaps the main board could be bad . How can I check the main board and the transformer although The transformer has 4 output leads the first two to the left goes to the Ac output and the the other two goes to the board .I have checked for continuity that was extend of my test.
any insight will be greatly appreciated
How can I check the main board and the transformer
The mainboard havs 4 mosboard and should see 4 LED light up green with inverter switch OFF and battery connectrd . The control board should be Rev 11.3 and at least 2 green LED light on when the inverter switch is ON . IF LED are all OFF or LED are blinking or the mosfets blow up then it is wrong control board or bad LF driver . The transformer can be check IF the control board is good and LED is green . The transformer 2 primary should be 32vAC to 36vAC if 48 vdc inverter . The 2 secondary is 230vAC to 240vAC . Rev 11.1 or Rev 11.0 or Rev 10.3 control board will blow up the FETs instantly . The newest AMG inverter will self test for error and not start untill error is fixed . I use my 30kw Powerjack for 8 months starting in October to power the house and the heat from the hot transformer is use to heat the room .
How can I check the main board and the transformer although The transformer has 4 output leads the first two to the left goes to the Ac output and the the other two goes to the board .I have checked for continuity that was extend of my test.
Checking the transformer...it gets a bit difficult to test with actual power. But if "nothing happens" when you turn the inverter on, then a continuity check will be more than sufficient for determining if the transformer is good.
Check also the two (?) primary leads going to the FET heatsinks--they should also be basically a short circuit.
Mainboard...like @dickson says, when powered up, each of the MOS boards should have a green LED lit on it. (That doesn't necessarily prove anything other than that the board has voltage on it.)
Is the control board lighting up when you switch it on? Any sound from the transformer when switched on?