July 31, 20233 yr I have an Axpert 5kva/4kw inverter that is behaving erratically. The inverter works fine when there is mains power and/or solar power. At night when load shedding starts, it works fine for like 45 minutes and then gets a fault code 03 (Battery voltage high) mostly. The battery voltage it reports is 19V (not high) and the measured voltage is 49V. I have to restart it by switching the battery on and of. Then it faults again after a few minutes often with the same code, but sometimes other codes. The measured values reported does not make sense. Can anybody recommend a good repair vender?
July 31, 20233 yr 2 hours ago, Hennie_Strydom said: I have an Axpert 5kva/4kw inverter that is behaving erratically. The inverter works fine when there is mains power and/or solar power. At night when load shedding starts, it works fine for like 45 minutes and then gets a fault code 03 (Battery voltage high) mostly. The battery voltage it reports is 19V (not high) and the measured voltage is 49V. I have to restart it by switching the battery on and of. Then it faults again after a few minutes often with the same code, but sometimes other codes. The measured values reported does not make sense. Can anybody recommend a good repair vender? Hi Hennie, I have been involved with a similiar fault over the weekend. Only in your case the battery reading is 19v instead of 120v I got from the one under my test. There is probably two reasons for this fault, that is ether bad sensing resistors, or missing or bad - 12v rail supply. In either case you must dissasemble your machine, which will take some doing and time. Fortunately @Coulomb has compiled a walkthru, for which I will send you a link if you will want to go this route. Let us know your interest. Edited July 31, 20233 yr by BritishRacingGreen
August 1, 20233 yr Author 15 hours ago, BritishRacingGreen said: Hi Hennie, I have been involved with a similiar fault over the weekend. Only in your case the battery reading is 19v instead of 120v I got from the one under my test. There is probably two reasons for this fault, that is ether bad sensing resistors, or missing or bad - 12v rail supply. In either case you must dissasemble your machine, which will take some doing and time. Fortunately @Coulomb has compiled a walkthru, for which I will send you a link if you will want to go this route. Let us know your interest. Yes please send me the @Coulomb link.
August 1, 20233 yr 1 hour ago, Hennie_Strydom said: Yes please send me the @Coulomb link. Hi Hennie , please find below link which is @Coulomb disassembly and assembly guide . Please also refer to the connection diagram at the back of your Axpert service manual for additional information , and don't forget to take phone camera shots of your own disassembly in stages , which also helps a lot. Once you have your main separated , you can start performing test , initially with your multimeter to test values of the battery sensing resistors . If they are still ok , you will need a 48v-60v variable current limited power supply to bring up the board standalone.
August 1, 20233 yr 8 minutes ago, BritishRacingGreen said: Hi Hennie , please find below link which is @Coulomb disassembly and assembly guide . Please also refer to the connection diagram at the back of your Axpert service manual for additional information , and don't forget to take phone camera shots of your own disassembly in stages , which also helps a lot. Once you have your main separated , you can start performing test , initially with your multimeter to test values of the battery sensing resistors . If they are still ok , you will need a 48v-60v variable current limited power supply to bring up the board standalone. sorry here is the link : https://forums.aeva.asn.au/viewtopic.php?p=65658#p65658
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