Aero-Sharp problems - Inverter Grid Volt Error, Repair

Aerosharp Inverter > Problems & Faults

Mains voltage too high - By default, Aero-Sharp inverters are set to shut down if the grid voltage exceeds 260v. When this happens, a "Grid Volt Error" message appears and no power will be exported. This can occur in some distribution areas, particularly in Western Australia. In this case, the installer will need to re-program the inverter to accept the higher grid voltage.

PV Over Power Error - Some installers also push the limit of the inverters, installing a string of panels that border on, or slightly exceeds the maximum PV input voltage or current. This can cause problems when the sun emerges from clouds (edge effect), causing a momentary increase in output beyond the specifications and overloading the inverter's input. The inverter will shut down, and will (in most cases) attempt to start up again after a short moment.

Aerosharp Grid Volt ErrorGrid Volt Error - The display shows Vgrid as 0v (or some other very low value) instead of a value of at least 210v. This can be caused by a number of things. The most likely is when the internal fuse blows (see next section). A faulty TVS on the AC side can also be the cause, and this can be one of the causes of the fuse blowing, or otherwise causing the circuit breaker to keep tripping. A faulty AC circuit breaker can also cause this. The main control board can also cause a Grid Volt Error if it has malfunctioned.

Fuse Failures - most Aero-Sharp failures can be attributed to the use of an under-rated fast blow fuse (HRC type). Replacing it with a slow-blow version generally fixes the problem. The large isolation transformer helps to smooth out voltage spikes on the AC side, which in turn reduces the chances of the (expensive) IGBT getting damaged as a result of a power surge.

High pitched noise - Some earlier Aero-Sharp X01 inverters were notoriously noisy. It can be described as a high pitched screeching noise that becomes stronger as the inverter generates more. At full load (e.g. midday on sunny day) the noise is almost painful to the ear. The high pitched buzzing is superimposed with the normal 50Hz transformer hum.

Later generations of the X01 inverters are much quieter, and the 50Hz transformer hum can only be heard when closer than a meter from the inverter. In noisy environments (such as a busy street), one may need to put their ear up to the inverter to be able to hear the hum.

Battery fault - The display panel (mounted behind the front lid) contains a replaceable 3 volt CR2032 lithium coin cell. This maintains the clock and previous history (total time & kWh). If the cell goes flat, the internal clock is reset and the inverter may not report daily kilowatt-hours properly. The clock is set to the timezone where the inverter will be exported to - i.e. GMT+10 for the eastern states of Australia.


donna here, Sun, 06 Apr 2014 12:05 pm: Reply
A small. Picture of how the settings should be would be helpful. I over know which switch should be where where on the pv array box
Fred Edwards, Sat, 18 Aug 2018 01:42 pm:
Read outs on screen of Aerosharp Inverter.
Grid Volt Error,PVI 330V, Mode 0W,VPR 348,View 2 351,Grid Standby, Total 28842, POUT Old, Mode Standby, E Total 25141, Vgrid 0.

Dave Mcguirk, Mon, 22 Sep 2014 02:20 pm: Reply
My inverter is showing no fault light but says aero sharp please wait

Dave Mcguirk, Mon, 22 Sep 2014 02:22 pm: Reply
My inverter is showing no fault light but says aero sharp please wait please contact dav201158@big au

vaughn, Wed, 15 Oct 2014 12:01 pm: Reply
my inverter says grid volt error stand by, and the next line Vpv1 332V. i have tested power points in the house and they are running at 241V on average.
Dallas, Tue, 21 Oct 2014 02:28 pm:
Just had a Grid Volt Error, Suspect the MOV (varistor)/TVR surge protectors, took out the 16A ceramic fuse. Replaced one of the yellow L-N devices I think I could smell some burning on that one. Original device is a 450V working 750V trip, 400 Joule. Replaced with a pair of blue 14mm(200J)
in place just in case. Currently running on an 11A ceramic fast blow fuse and all is well, Will invest in an expensive 16A Bussmann later.
One note is the MOV devices degrade over time and are consumable. The tripping voltage reduces as they degrade with accumulated transients. There is a grey push button terminal strip making replacement quite easy. Just unscrew the 4 screws on the CPU PCB to access.
Dallas, Tue, 21 Oct 2014 02:36 pm:
Forgot to mention, the MOV from Jaycar RN3416 , The catalog says 200J and the web says 145J, anyway the more J the better, the longer time between replacement, so just parallel a few, and maybe replace all 3, or just the L-E as well as the L-N.

Paul Brooke, Thu, 06 Nov 2014 10:06 am: Reply
I have 2 3.3 kW inverters running on 2 phases. One is running fine after 3 years, the other seems to work one day not the next. On the days it is not working it shows 0w on the Pout and 0 on the kWh, but all other numbers are the same as the one working ie. Vgrid time VPV.
There is no "fault" message showing.
Any ideas?

Michael, Thu, 18 Jun 2015 12:01 am: Reply
How do I fix grid volt error display reading on our photovoitac power inverter model HR-INV-X01-015
john, Mon, 17 Sep 2018 05:13 pm:
how do you reprogram your inverta when it reads that grid voltage is to high at 253 v

Paul, Wed, 30 Sep 2015 06:58 am: Reply
My display panel was all fried up and I could not see any readings. All the information on the forums suggested that the LCD was fried from direct sunlight, purchased a replacement and upon removing the old one found that the display looked ok but the clear acrylic panel was gunked up. I used a razor blade scraper and removed the residue. All good and original display works fine. I think the inner protective film on the acrylic panel was never removed and this is what fries. Try this before purchasing a new display board.
Kurt, Sun, 13 Dec 2015 03:34 pm:
My display had also turned opaque and was not readable. It appears that the acrylic window had degraded from UV exposure. I had to cut out the area of previously clear section and silicone in a new clear piece. All good now except that it seems that the internal clock is out of sync. It thinks that 10.30am is 12 midnight when I suspect the inverter resets it's reporting for the next 24hr period. Does anyone know how to reset the clock without removing the internal lithium cell battery? Cheers

Lida, Tue, 20 Oct 2015 08:39 pm: Reply
Hi, my inverter is showing d-21 message. Can you help me with that

ray lew, Thu, 14 Jan 2016 11:38 pm: Reply
my 1.5 inverter often does not switch on, I have to restart

Gg, Thu, 19 Jan 2017 07:27 pm: Reply
Does anyone know where to buy a TVS for an aero-sharp HR INV 020

Kosmeyer, Wed, 01 Mar 2017 01:31 pm: Reply
My Aero Sharp makes the screaching noise described by the above. What can be done if anything?

john, Tue, 28 Mar 2017 09:01 am: Reply
my aero sharp shows a fault light . i checked a glass fuse ok. are there any other fuses to check

Charlie, Sat, 29 Apr 2017 10:16 am: Reply
How does one reprogram the inverter for a higher voltage? and what is low/high range? Also, what is the frequency range you can set it to?
I got an inverter from ebay, but am not using it and have no panels. In the distant future I could consider using it on an induction generator, but I could try a genset, either will be interesting, but I really would like to know the ranges and how to adjust so I can plan ahead.
If it works with the genset, the generator will probably end up engine braking (depending on panel power compared to the generator capacity and the load), else the inverter may panic once it notices the AC frequency is distorted because the old engine is varying the rotation rate (currently the generator is an old one that is currently set to produce 46hz and 208VRMS tops, perhaps to save juice).

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