Switched off solar inverter to clean, how restart?

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Switched off solar inverter to clean, how restart?

Postby Araich » Sun Dec 23, 2018 5:00 pm

Hiya, I have a Aurora 5000 solar inverter installed by energy matters, it was filthy so I switched off the AC Isolator switch and hosed around it (not on it) and gave it a wipe. I've since tried ever combination of switches to restart it (waiting 10 min plus). I've followed the dc on, ac on, order, double checked the fuse box switches, tried it with and without ac fuse on. I can't work it out. I didn't turn off the DC isolators when I cleaned around it, just the AC.

I climbed the roof and looked at one of the rooftop isolators and it is in the on position.

What have I done wrong?
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Re: Switched off solar inverter to clean, how restart?

Postby australsolarier » Mon Dec 24, 2018 4:21 pm

did you check the solar AC breaker in the fuse box?
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Re: Switched off solar inverter to clean, how restart?

Postby Privatteer » Mon Dec 24, 2018 8:22 pm

From the sounds of things you switched off the AC side first.
If it was at high load its possible but rare the circuit breaker has blow a contact clean.

Any lights at all coming up on inverter?
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Re: Switched off solar inverter to clean, how restart?

Postby Araich » Mon Dec 24, 2018 11:20 pm

No lights at all. I've found that ac is present in the inverter (236v) but dc is showing zero (0.02v) with both isolators in the on position. Might I have blown the rooftop fuses? It was sunny when I switched it off.
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Re: Switched off solar inverter to clean, how restart?

Postby dRdoS7 » Tue Dec 25, 2018 10:14 am

Hi,

Araich wrote:No lights at all. I've found that ac is present in the inverter (236v) but dc is showing zero (0.02v) with both isolators in the on position. Might I have blown the rooftop fuses? It was sunny when I switched it off.


Take the cover off the both DC isolators and check inputs have DC? Do you have rooftop fuses?

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Re: Switched off solar inverter to clean, how restart?

Postby Araich » Tue Dec 25, 2018 11:48 am

Yes to no DC current present inside the inverter at terminals from dc current in. Yes to rooftop fuses (bullet or cartridge shaped ones). Not checked them yet. Are they safe to just flip and remove?
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Re: Switched off solar inverter to clean, how restart?

Postby australsolarier » Tue Dec 25, 2018 12:16 pm

yes, the fuses or switches are safe as there is no current flowing anyways.
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Re: Switched off solar inverter to clean, how restart?

Postby Araich » Tue Dec 25, 2018 6:09 pm

Climbed up and popped out the 2 rooftop fuses on one array. Both read absolute resistance so must be blown. The other array is of course on the second storey. Sigh

Why would they blow just because I turned off the AC isolator? I don't get it.

They are Ferraz Shawmut HP10M12 12A 1000VDC fuses, any suggestions on buying?
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Re: Switched off solar inverter to clean, how restart?

Postby davidg » Tue Dec 25, 2018 6:55 pm

Here you go.

https://au.rs-online.com/web/p/cartridge-fuses/8068420/

or search ebay for 10 x 38mm 12a fuse or 10 x 38mm 15a fuse

order spares as well.
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Re: Switched off solar inverter to clean, how restart?

Postby dRdoS7 » Wed Dec 26, 2018 8:01 am

Hi,

davidg wrote:order spares as well.


Especially if you're going to make a habit of cleaning around the inverter with water! :lol:

I have lots of spare fuses, never needed one in > 5 years.

I did a bit of "stocktaking" before I retired (have a few 15A), so I can post you a few. You may get them before next year if you're near 3220 postcode. Message if you want some.

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