One more help pls. You are welcome Badereldin, I am glad it helped! Now the problem is main power MCB is tripping some time when switch on the UPS, and DC power going down when I using the UPS. Now I’ve changed the mosfets but the light is still on and no AC output from the inverter. I didn't open the cover and inspect for any burnt components yet and the inverter itself doesn't smell like a capacitor etc. it blew one more Mosfet and after replacing it together with its a gate resistors, there is no more short circuits and the inverter can switch on on battery mode and on ac mode. Off grid small house system. It also has ruined 3 breakers that are between batteries and inverter. In mains power supply mode displaying full charge (New battery just 2 months old) battery in display, Once main power supply is off, all display light off in inverter, and no power output also. By the way an inverter is never supposed to start if the battery is over discharged, so if your inverter is refusing to start due to low battery then it is doing the right thing, you must make sure that the battery is correctly charged either by solar or by the grid. But when I put the power plug into the socket, it works normal though mains have no electricity!! please i have inverter prag brand of 2kva with 2 batteries 24 V, i bought the battery 3 weeks ago, when i connected them to my inverter, the indicator continue to beep and indicate high voltage from DC inputs and high load, it stops and worked normally after which i used it thrice, when i switched on after 3 days, there is no output voltage it is only beeping thinking the battery is low i tried to charge it, but there is no indication that is charging, when i connected these batteries to another inverter they worked perfectly. Your Account. I looked at all mosfets and found 6 that didnt work and replaced them. Try adding a 0.22uF/400V capacitor right across the inverter output terminals and check the results. I have one doubt about inverter.im using 800va it is good condition but sometime come to ups mode when main supply on mode condition.suddenly interchange the main supply to ups mode but have EB supply is there. You are absolutely right. Trouble is, I have taken the case off but can see nothing inside that resembles a typical circuit breaker. Now you have helped to identify the oscillator which i also confirm from data sheet. I have tried with higher rating fuse however it didn't worked. Hi, sorry, that may be too tough to judge without a practical checking. I recently bought an Exide ECO 900 Inverter (Square wave inverter) and I am facing the below issues. Hello Warren, it appears like the inverter is equipped with a "no load cut-off" feature and that's a good feature to be included in the system. most probably the mosfets or the power devices are burnt…because the AC might have powered the transformer in the reverse way causing heavy current to flow into the mosfets blowing them off…this is my assumption. But strangely, functions well if I disconnect it from the mains and reset it even with full load connected. 2004019-001 GE Dash 4000 Backlight Inverter Board Refurbished. Manufactured by GE. I plugged it in to charge as usual and everything was fine, after a while I noticed it wasn’t charging again. Please advise. Also the 40v ac appears to be interfering (but I'm not certain) with various charging cycles from solar and wind controllers. This item: GE Inverter Board (WR49X10283) $221.95: GE Main control board (WR55X10956) $166.60: GE BOARD ASM MAIN CONTRO (WR55X10560) $190.71: Do-It-Yourself Stories from Customers like You . Today I found Mains to UPS mode is not working. Hi Sir, My inverter goes into Low Battery modend instantly goes back to normal inverting when I put on my 120watt TV. I bought 2 APC smart UPS 3kv and they developed a fault suddenly not too long from when i bought them. My defective inverter board is a "embraco vcc3 1156 06 f 13" the OEM replacement is a Bosch AP4397817 which cost around $300. This part is compatible with the following GE Refrigerator models: I removed it from the solar panel system and connected it directly to the battery and it still is making the beeping sound. connect an ammeter in series with the battery positive, and verify if really there’s a short circuit happening somewhere or not…if not then it’s the LED indicator sage which may be malfunctioning. Just to let it clear. Description. i would have attached the video but no position for attachment. This is making 12v backup generator live to 40v ac and zaps someone when they go to start the generator. $217.79. I checked UPS on main line without battery. This voltage is finally utilized for powering the various household electrical gadgets like lights, fans, mixers, soldering irons etc. Part Number wr55x10979 replaces 2677747, PS6883663, WR55X10490, WR55X10685, WR55X10979, B00LQDI048. Swagatan , My friend brought Fortune DSP sine wave Home UPS FR1000 to check why the inputs and outputs of the unit were not being read on the LCD Display. Any tips highly appreciated. If the battery doesn't charge optimally through an external charger it would indicate a damaged or a sulfated battery and will need to be changed, Hello sir, i have a microtek inverter which was working nicely from couple of year but suddenly i got one problem….wen i start it or increase load on it…… it starts generating abnormally high sound and output voltage i very low but at that tym it blows CFLs and mobile chargers……. I searched electronic shops and I find 474k/630V, is it ok to use instead of 474/400V. Sir, I have 5kva/120DC online UPS/Inverter , Recently due to power failure batteries are fully discharged. I am sorry Ali, it would be difficult to judge the issue by imagining, it'll need to be diagnosed practically. please guide me the difference between narrow and wide switch function? Or you can try bypassing the changeover section to directly connect the battery with the inverter. Can’t make out the the color rings in it at all. If its hit by lightening then I am afraid the damage could be significant, it would be difficult to troubleshoot it without a practical examination.. Hi Swagatam,I have one Microtek SEBZ & other Bajaj make UPS both for 12V single battery DC to 230V AC.I have added them with battery bank of 24V, such a manner that each battery is fed to each inverter but there is changeover switch which can alternate their AC output manually. Such oscillations are generally in the form of square pillars and are termed as square waves, and the inverters operating with such oscillators are called square wave inverters. hell sir, my home inverter doesn't give output. Any help appreciated. If rectifying the mosfets and the oscillator does not solve the issue then its the trafo that may be shorted somewhere. Hi swagatam, Meaning there’s no need purchasing the oscillator ic since I can’t program it to running specification frequency for inverter to work? But when I pull the plug and wait a couple of minutes with the engine running, it will usually start when I plug it in again.. What could please be the issue, is it the inverter or battery as battery reads between 11v – 13.5v. Replaced the inverter board and now - Answered by a verified Appliance Technician Best wishes, SANKAR KUMAR CHATTERJEE M: 9163576074, Hi Shankar, does your UPS have a feature to switch the unit in the inverter mode during a high mains voltage detection? Hi Sir, i have inverex inverter and not taking load on battery while AC power is off.problem started after phase and neutral swapped at AC input to inverter mistakenly.swap resolved but still the problem is thereonly one circuit breaker present (outside boday) for input circuit and that is fine as its function well on AC input means battery charged properly and load also taken well but when AC supply get off, all load gets zero while battery showing 4 (max) cells charged.