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Inverter cutting out in hot weather
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<blockquote data-quote="nr16apple" data-source="post: 468467" data-attributes="member: 30490"><p>Have had Sunny Boy 4000TL installed for six years with absolutely no problems .. until the last few very hot days. Output cuts out for periods of about 20 minutes (then comes on again) from about 11 am to 2 pm (peak time). Inverter is in attic - gets hot! I've monitored closely and by opening access door and getting a breeze through attic it seems to be able to cope. Today I've helped it with a subsidiary fan and all seems well, even though it's hot and still outside. There is a fan installed in the inverter but I wonder if it, or its controller, has partly failed. I seem to think, in the past, I've heard quite a bit of noise from the fan as it worked hard. Now it is still making a small sound but not blowing very hard. I know it's a 12v DC fan but is it supposed to come on gradually or should it be 'all or nothing' if the temperature sensor calls for it come on? I've checked for cobwebs etc - nothing. Youtube videos show cleaning etc, but, understandably nothing more. Are we the only ones with problems? </p></blockquote><p></p>
[QUOTE="nr16apple, post: 468467, member: 30490"] Have had Sunny Boy 4000TL installed for six years with absolutely no problems .. until the last few very hot days. Output cuts out for periods of about 20 minutes (then comes on again) from about 11 am to 2 pm (peak time). Inverter is in attic - gets hot! I've monitored closely and by opening access door and getting a breeze through attic it seems to be able to cope. Today I've helped it with a subsidiary fan and all seems well, even though it's hot and still outside. There is a fan installed in the inverter but I wonder if it, or its controller, has partly failed. I seem to think, in the past, I've heard quite a bit of noise from the fan as it worked hard. Now it is still making a small sound but not blowing very hard. I know it's a 12v DC fan but is it supposed to come on gradually or should it be 'all or nothing' if the temperature sensor calls for it come on? I've checked for cobwebs etc - nothing. Youtube videos show cleaning etc, but, understandably nothing more. Are we the only ones with problems? [/QUOTE]
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