Nice to put out videos like this. Must inverters are very good but difficult to repair once it has a fault. I have over 3 faulty MUST inverters that no technician can repair. I think you need to do more to help technicians to resolve the different faults that may be experienced with the inverter. One don't need to keep buying replacement inverters for a little fault that can be repaired.
What does the "power On switch" do on the "PV1800 VPM 12V 1KW"? It doesn't turn off my inverter completelly for some reason. When it is off, my inverter starts working as soon battery and AC utility are connected.
Good afternoon dear! Is it possible to program the control board of a 5.5 kW solar inverter via a laptop? My inverter has a discrepancy of 2.2 - 2.5 volts from the batteries, for example, on the inverter there is 54 volts and at the same time in the batteries there are 56.5 volts.
Nice video. I have 2 pv1800 are defected. One restart without any error number. And fan not working. Is there a schematic board or any help to resolve these. Thanks
Hi Must Energy Group. We have an PH1800 5Kw that has developed a problem this week. This inverter has been in operation since mid year 2020. All three LED Lights are blinking alternately continuously. The Inverter is stuck at the screen showing 48v and 5.0kw. What could have failed inside ?
my MUST PC1800A Series MPPT Solar Charge Controller (60/80A) shows Fault Warning Light in the evening for awhile when there is no more sunlight and then the controller turns OFF . But turns back ON in the morning of the following day when the sun comes out. Is this a problem or is it how it is suppose to function because I have been using it for awhile now????
Ich habe einen PovMr Wechselrichter 5,5 kw . Er zeigt auch Fehler 09 an und es waren irfb 4110 verbrannt. Ausgetauscht aber der Fehler bleibt! Es waren die Mosfets auf dem anderen Kühlkörper. Wie kann ich die Mosfets am 230 Ausgang messen ?
@@MUSTENERGYmein inverter ist aber innen komplett gleich , wie dieser im Video und zeigt auch Fehler 09 an ! An was kann das liegen wenn kein Strom heraus kommt ?
Hello, my 3KVA MUST inverter sometimes gives error 52 " inverter bus voltage low" even when it is sunny . What should I do to stop this from recurring?
I would swap new capacitor for bus i gues its 560uf and 500V or similar. Would also check resistors for voltage divider changing bus voltage into smaller voltage acceptable by adc of the microcotroller.
@@arslananjum7663 I think it was due to low battery voltage, I was using 2 x 12V lead acid batteries which I had been using with a power inverter before I bought a hybrid inverter. So with the power inverter, I remember deep discharging those batteries a couple of times and when I began to use them on hybrid inverter I would have that error every now and then until I realised that 1 of those batteries could no longer supply 12V to the system but far less like 6V or 7V but all was resolved when I began to use a 24V lithium battery.
Hello, I have a must PV18 3024 vpm solar inverter. When I feed it with AC the screen turns green without any digits and starts beeping repeatedly. Where does the error come from? Since there are no numbers, I cannot locate it. Thank you very much in advance.
Hello, my inverter started giving error 09 There is a transistor NCE60TD65BT in my inverter "must PH18-3024 Plus", can I replace it with a transistor GWA80H65DFB?
hello, Component substitution needs to be tested. Electronic components must undergo multiple tests before they are used to mitigate potential safety hazards.
Hello, I am a technician who deals with electronic repair service in Italy I sometimes have to repair some voltronic inverters like yours I have difficulty in finding wiring diagrams and components, you have information to give me thanks Antonio
Hi I encountering inverter grid voltage sensor error (PV1800 model ) error 22 Could you help advice, is sensor mean AC Input right? Thank you in your advance.
The inverter is stuck on a low battery error and does not charge the battery. warning indicator ( 12 ). must inverter hybrid ph18-3kva. battery is good. please what is problem
My inverter keeps flushing all three lights and displaying everything on LCD and after 1minute a relay sound keeps on ticking what could be the problem it is not showing any error
Hello i have the same inverter says error 13 i need to know what is the problem i have no pdf file and find nothing on internet my model is Model Name:PH18-3K MPK PRO pleasd help
en.must-ee.com/DL/PV1800,3-5.2KW,PRO,100A,BMS,JC,EN,MUST,M.pdf en.must-ee.com/DL/PH1800,3-5.2KW,PRO,100A,BMS,JC,EN,MUST,M.pdf ------------ These two instructions may be useful to you, please note that these are the latest models.
thanks for this videos , always post such videos to help us in maintenance work
Nice to put out videos like this. Must inverters are very good but difficult to repair once it has a fault. I have over 3 faulty MUST inverters that no technician can repair.
I think you need to do more to help technicians to resolve the different faults that may be experienced with the inverter. One don't need to keep buying replacement inverters for a little fault that can be repaired.
We're sorry you've encountered this issue! MUST is working hard to constantly improve your user experience.
У меня тоже проблемы с вашими инверторами. Поддержка вообще не помогает
Good job sir
What does the "power On switch" do on the "PV1800 VPM 12V 1KW"? It doesn't turn off my inverter completelly for some reason. When it is off, my inverter starts working as soon battery and AC utility are connected.
Please read all the instructions first :
en.must-ee.com/DL/PV18,1012VPK(VPM),EN,MUST,M.pdf
What solution are you using for the glue?
How did you know to change those two mofets, they were reading the same as the others ? Thanks for videos, massive help
No, these two had short - 0.00, rest showed diode forward voltage inside the transitor arround 0.3. these are not mosfet, rather igbt transistors.
@@tomg8069Hello! I also have error 09 but all transistors are intact. what could it be? thank you in advance
Good afternoon dear! Is it possible to program the control board of a 5.5 kW solar inverter via a laptop?
My inverter has a discrepancy of 2.2 - 2.5 volts from the batteries, for example, on the inverter there is 54 volts and at the same time in the batteries there are 56.5 volts.
Hello, can you send your question to our engineers and they will help answer it for you.
service@mustenergy.com
Nice video. I have 2 pv1800 are defected. One restart without any error number. And fan not working. Is there a schematic board or any help to resolve these. Thanks
Is it right for you?
en.must-ee.com/DL/PH18-5248%20PRO%20Maintenance%20manuals.pdf
Thank you for the document very helpful .
If I could get it for pv1800, as I mentioned before. Schematic a little different. Thanks
@@begladhammoud7805 It is a relatively similar model
Video hat keinen Ton ! Woher bekommt man diese Orginal Mosfets ?
Hi Must Energy Group.
We have an PH1800 5Kw that has developed a problem this week. This inverter has been in operation since mid year 2020. All three LED
Lights are blinking alternately continuously. The Inverter is stuck at the screen showing 48v and 5.0kw.
What could have failed inside ?
How are you?
Could you pls add our after sales engineer Mr. Cui and describe your problem details, with video better?
email: cs-cds@mustpower.cn
my MUST PC1800A Series MPPT Solar Charge Controller (60/80A) shows Fault Warning Light in the evening for awhile when there is no more sunlight and then the controller turns OFF . But turns back ON in the morning of the following day when the sun comes out. Is this a problem or is it how it is suppose to function because I have been using it for awhile now????
hello, If you encounter any post-sales issues, kindly send an email to our customer service engineer at service@mustenergy.com.
Ich habe einen PovMr Wechselrichter 5,5 kw . Er zeigt auch Fehler 09 an und es waren irfb 4110 verbrannt. Ausgetauscht aber der Fehler bleibt! Es waren die Mosfets auf dem anderen Kühlkörper. Wie kann ich die Mosfets am 230 Ausgang messen ?
Hello, the inverter you provided is not manufactured by us.
@@MUSTENERGYmein inverter ist aber innen komplett gleich , wie dieser im Video und zeigt auch Fehler 09 an ! An was kann das liegen wenn kein Strom heraus kommt ?
@@manfredanhorn1817 This brand is not manufactured by the MUST Company. You may consider reaching out to them directly to address any issues.
Hello, my 3KVA MUST inverter sometimes gives error 52 " inverter bus voltage low" even when it is sunny . What should I do to stop this from recurring?
I would swap new capacitor for bus i gues its 560uf and 500V or similar. Would also check resistors for voltage divider changing bus voltage into smaller voltage acceptable by adc of the microcotroller.
mine is too showing error 52 how resolve this
@@arslananjum7663 I think it was due to low battery voltage, I was using 2 x 12V lead acid batteries which I had been using with a power inverter before I bought a hybrid inverter. So with the power inverter, I remember deep discharging those batteries a couple of times and when I began to use them on hybrid inverter I would have that error every now and then until I realised that 1 of those batteries could no longer supply 12V to the system but far less like 6V or 7V but all was resolved when I began to use a 24V lithium battery.
Hello, I have a must PV18 3024 vpm solar inverter. When I feed it with AC the screen turns green without any digits and starts beeping repeatedly. Where does the error come from? Since there are no numbers, I cannot locate it. Thank you very much in advance.
Hello, please write to our engineers,
service@mustenergy.com
ممكن مخطط شامل الانفيرتر فولترونيك
Hello, my inverter started giving error 09
There is a transistor NCE60TD65BT in my inverter "must PH18-3024 Plus", can I replace it with a transistor GWA80H65DFB?
hello, Component substitution needs to be tested. Electronic components must undergo multiple tests before they are used to mitigate potential safety hazards.
Hello, I am a technician who deals with electronic repair service in Italy I sometimes have to repair some voltronic inverters like yours I have difficulty in finding wiring diagrams and components, you have information to give me thanks Antonio
Feel sorry, The equipment you mentioned is not produced by MUST.
@@asmatullah7525 many thanks I Will Do It!
@@MUSTENERGY hi I am looking for the wire diagram for the Must hybrid 5kw inverter.
Could you help me please 🙏
@@lourensjacobs9089 Is it right for you?
en.must-ee.com/DL/PH18-5248%20PRO%20Maintenance%20manuals.pdf
@@MUSTENERGY yes thanks 😊
Is the 09error covered under the warranty and if so why and if it s not covered under warranty why
boost up circuit problem，check DC-DC mesfet and it's driver
Is it possible to get maintenance manual for Must PV18-3024 VPK inverter? Thank You in advance.
what is the error code please
error 75
Is the 09 error covered by warranty?
Need to check if the product is within the warranty period
Hi I encountering inverter grid voltage sensor error (PV1800 model ) error 22
Could you help advice, is sensor mean AC Input right? Thank you in your advance.
AC current sensor have problem.
Thank you. Now I fix it.
after fix error code 22.
And I encountering error 04 & error 56 , please help and advice again, thank you in your advance.
@@ช่างหน่อยชุมแพ error 04 battery is too low, error 56 battery connection is open. pls check battery actual voltage.
Hello, do you have a team I can contact to help with the repair?
Bom dia,aonde consigo os IGBT OST85N65?
The inverter is stuck on a low battery error and does not charge the battery.
warning indicator ( 12 ).
must inverter hybrid ph18-3kva.
battery is good.
please what is problem
What is 90 error mean?
sir.. i have same problem.. already change mosfet part that burn.. but still got error 9.. what should i do??
hello, please file it with the dealer.
Hello, I have a must inverter with error code 21, will there be a solution?
How are you?
Kindly send an email to our customer service engineer at service@mustenergy.com
My inverter keeps flushing all three lights and displaying everything on LCD and after 1minute a relay sound keeps on ticking what could be the problem it is not showing any error
this is the initial check when power on inverter，if inverter work normally，there is no problem
Hello i have the same inverter says error 13 i need to know what is the problem i have no pdf file and find nothing on internet my model is Model Name:PH18-3K MPK PRO pleasd help
May I have your email or wechat? we will ask our aftersales team to help you solve.
Who have schematic plans or manual of service of models.?
If you encounter any post-sales issues, kindly send an email to our customer service engineer at service@mustenergy.com.
How do I reslove error 05 on 3KVA inverter
Could you pls add our after sales engineer Mr. Sven and describe your problem details?
email: cs-lgy@mustpower.cn
We repair MUST in Ukraine
how to repair error 43 . error appears when connect solar panel >>how to solve it?
error 43--- Inverter grid under frequency
Please disconnect the mains power and try again.
@@MUSTENERGY I did not connect the mains power to the inverter. I just connected the battery and then connected the panel. Is any solution?
Kindly we need service manual for this model
en.must-ee.com/DL/PV1800,3-5.2KW,PRO,100A,BMS,JC,EN,MUST,M.pdf
en.must-ee.com/DL/PH1800,3-5.2KW,PRO,100A,BMS,JC,EN,MUST,M.pdf
------------
These two instructions may be useful to you, please note that these are the latest models.
The link refers to the user manual. It is not the service manual.
Please be so kind and add the link to the service manual here.
how to repair error 52
How are you?
Kindly send an email to our customer service engineer at service@mustenergy.com
Another low budget high frequency, transformerless inverter. No thanks.
Hello, we can use it together. If you need to set up details, you can consult our engineer at: service@mustenergy.com.
pv1800 3kw error 75
Customer Service Department
service@mustenergy.com