Problems related to uninterruptible power supply and Power Inverter have been discussed here with possible remedies. If you have any UPS or Power Inverter related issue, this post is helpful to fix that. Someone might argue why I have made a single post for two separate products. The answer is simple. If a power inverter carries a built-in charger with reasonably low switch over time from external power source to backup batteries, it acts as a UPS. Manufacturers who sell Power Inverters and UPS’ under two different categories provide built-in batteries for UPS which are packed inside the enclosure. But no batteries are provided with Power Inverters and consumers are allowed to connect them to desired size batteries of their choice. Therefore, Power Inverters circuited with larger batteries can be used to provide backup for a longer duration during power outages or scheduled load shedding. In short, UPS and Power Inverter both can be used as uninterrupted power backup source for home and office appliances, mobile communication equipments, servers and much more.
UPS / Power Inverter is not turning on.
Possible Cause & Remedy:
1- Power switch is defective. Take it to service center for repair.
2- UPS / Inverter is tripped. Press Trip reset button on UPS / Inverter to reset it.
3- Battery is not connected. Connect the battery.
4- Battery terminals are loose. Check battery terminals.
5- Battery terminals are corroded or rusty. Clean them.
6- Battery is weak. If it is old, replace it. Otherwise, charge it.
6- Battery is discharged. Charge it for several hours before putting it to work.
7- Battery is faulty. Replace battery.
8- Battery terminals are reversed. Connect terminals correctly. Refer to user’s manual for details.
Battery is not getting charged.
Possible Cause & Remedy:
1- Battery is dead. Replace battery.
2- Rectifiers are burnt. Take UPS / Inverter to service centre for repair.
3- Fuses are melted. Replace them.
4- Battery connection is loose. Check battery terminals for corrosion. Clean them and clamp them firmly.
Backup time is shortened.
Possible Cause & Remedy:
1- Too much power consumption. Disconnect extra load.
2- Battery has worn out. Change battery.
3- Battery is not properly charged. Charge it. If charger appears to be faulty, get UPS / Inverter fixed.
4- Battery has lost electrolyte. Top up flooded lead acid battery with distilled water regularly. Sealed (dry or maintenance free) battery requires replacement.
UPS / Power Inverter works only in inverter mode.
Possible Cause & Remedy:
1- Input is not connected. Check power cable.
2- Fuse is melted. Change it.
3- Input protector is effective. Reset input protector.
4- Input is too high to be accepted. Check input voltage.
5- Input is too low to be accepted. Check input voltage.
Alarm buzzer beeps continuously.
Possible Cause & Remedy:
1- Overload. Disconnect extra load.
2- Cooling fan is stuck. Take UPS / Inverter to service center or service it yourself.
3- Battery terminals are wrongly connected. Refer to user’s manual for details.
LCD displays fault code.
Possible Cause & Remedy:
1- Internal problem. UPS / Inverter circuit needs to be repaired.
2- External problem. Check battery cables, input and output wires, load etc. Correct any fault generating error. (Read user’s manual to determine fault code and its remedy)
Hear noise coming out of UPS / Power Inverter.
Possible Cause & Remedy:
1- Wind noise. It is normal.
2- Fan is noisy. Clean fan. If problem persists, replace it or get it done by trained personnel.
3- Humming noise produced by non pure sine wave UPS or Inverter. It is normal.
LCD/LED indicates overload.
Possible Cause & Remedy:
1- Devices drawing excessive power. Remove high power consuming devices
2- Shorted circuit causing overload error. Check if phase and neutral are joined together in wiring
3- Internally damaged. Needs repairing.
Also Read:
Why UPS Restarts Or Shutdown Computer – Reason & Solution
How to Fix Low Backup Problem with Power Inverter or UPS
[These are general solutions and may be applicable to inverters and UPS’ brands including APC, CyberPower, Microtek, Homage, Ecostar, Exide, Luminous, Sukam, Inverex, Kevin, Numeric, Blue Gate, V-Guard, Mercury, Amaron, Xantrex, Whistler, Wagan, Victron, Tripple lite, Thor, Spartan Power, SMA America, Samlex, Raptor, Power Bright, Morningstar, Magnum, Kisae, Go Power, Energizer, Cotek, Cnbou, Aims, ABB, Ablerex, Active Power, Aetes, Alpha, Alwayson, Amplimag, Benning, Chloride, Clary, Cyberex, Gustav Klein, Gutor, IE Power, Irem, Jovy Atlas, Piller, Minuteman, Powercom, Power Kinetic, Salicru, Sanken, Socomec, Solidstate, Tripp Lite, Toshiba, Mitsubishi, Fuji, Falcon]
Jeevan
I have Microtek EB1000 inverter
Inverter charge if input voltage is 250volt
Below 250 volt inverter is not charging
Please say something
Talal A.
Are you sure?
Get it fixed then. Take it to their authorized service center.
Aijaz kashmiri
I have bought new luminous inverter 850 with 150 ah battery. due to short circuit in mobile charge ups is not working neither any lights are glowing fuse is fit. what could be the problem. plz suggest me
Talal A.
Isolate inverter from wiring and run it. If it keeps giving problem you should better get it fixed.
vikas
Sir. I have exide home ups 1050 va and the problem is that for few seconds it shows charging mode and then backup mode after few seconds and continuously keeps changing..what could be the problem..
Talal A.
Is mains voltage stable?
Arie
Good day. After overload my inverter only works when power is on. As soon as power is disconnected it goes into fault condition. Even with no load. Please advise.
Talal A.
You may need to get it fixed now. Something might have burnt inside.
Shazia
I have exide inverter when i turn on the ups it shows overload, trip and power goes on/off can u plz tell me what is the problem?
Talal A.
If its doing the same when you run it without connecting output, you need to get it fixed. Take it to service center.
Prasad
I have a 11v 42 ah batteries inverter but the problem is when the power is gone some lights are not getting turn on but if I off the input all lights are glowing and if I off the output also all lights Are gone off. I don’t understand what the problem is. can you help me out guys?
Talal A.
Check the wiring. Your wiring has some fault.
Mahesh
Luminous850 gives loud beep sound at night, same as lights are gone, how to stop this beeps manually.
Talal A.
Is it fault sound?
Waihtut
I installed Luminous 2KVA Sine Wave UPS with 220ah two batteries. UPS show battery low although batteries have 24 V fully and can not get AC .
Please tell me .. how to fix this problem
Talal A.
Charge the batteries full before putting them in service. Even 2 new but discharged batteries will show 24V at terminals.
Sandeep
I have double battery luminous invertor.Its smart charge led is blinking even when electricity is gone and when electricity is available,smart charge led is still blinking but it generate beep sound every 13 or 26 minutes.This problem is from last two days.please help
Talal A.
Get your inverter repaired.
Meetal
I have a 3.5kva luminous inverter. I just bought it. I have it connected with 48v battery bank. Not connected main input as i charge it with solar. Now the problem is when i use a tester it get current on neutral out. My home wiring for all inverter power and main power is completely isolated. Is it must for me to connect the main grid neutral to the inverter.
Talal A.
That’s the stray voltage in neutral. There is nothing to worry about.
Amikesh
I had a microtek 650 va inverter with a 150 ah microtek battery. It was working fine till a few months back, there was no backup and battery low LED turns on after about 10 seconds of backup and shuts down.
When mains is restored charging led blinks for only about a minute and then glows constantly indicating full charged.
I even got a new exide 150 ah battery with same result.
I got a new microtek 900va ups eb inverter yesterday and after connecting it with the new battery. It gave about 30 seconds backup and then battery low LED turns on and shuts down.
Again when mains is restored, chrging LED blinks for about only a minute and then glows constantly indicating full charge.
What could be the problem?
Amikesh
Both were tubular batteries. Older battery Was bought in 2013
Talal A.
Your older battery is dead now.
I am suspecting your new Exide battery is also not that much new and it is dead as well. If it is under warranty get it replaced.
Shruti
My inverter battery takes long time to get charged even if it is used only for 2 minutes. What might be the problem. We have amaron battery of 150ah
Talal A.
Your battery must be old and it is failing to attain cut off voltage in timely manner.
Hosam
I have Eaton x5 ups new used one month it give me short circuit fault
Talal A.
Run it without connecting output and check. If problem occurs, take it to service center.
Showkat Ahmad Baba
My Inverter(Luminous Tez) is working properly, the batteries are working properly, but it is NOT CHARGING. What is the problem and what is the solution?
Talal A.
Check input and voltage.
Ahsan
Our hybrid inverter of 4kw works on solar but doesn’t work on main supply.so at 9 pm the back-up of battery weakens and turns off whole supply. And inverter not going on mains supply. What is the problem ?
Talal A.
Check mains voltage. If voltage is normal then inverter is faulty.
Chikere Wisdom
My mercury UPS 1000va , when plugged to main power outlet don’t charge and don’t come on, I opened it saw some whitish stuff on the terminals of the battery.
Talal A.
Clean the terminals. Those corroded terminals could be the culprit.
Pradeep Kumar barik
My battery is ok .but the inverter continues charging. it does not stop the charging. charging symbol is continuously on. What is the problem?
Talal A.
Connect inverter to different and newer battery and test it. You will get the idea where lies the problem.
mk dwivedi
my luminous solar hybrid 850va inverter is working on ups mode and charging with solar but mains indicator does not always show despite presence of mains?
Talal A.
There could be some fault in inverter!
Also check mains voltage and make sure it is in normal acceptable range.
Rak K
I have a LUMINOUS inverter. Smart charging button is continuously on without noise noticed morning onwards (23rd Oct 17). checked water levels at battery & perfectly OK. Please let me know what could be the reason.
Talal A.
Are you batteries old?
Lawrence N.
My Genus 3.5kVA inverter suddenly stopped supplying power and started displaying “Protection Overload Trip” even when there is no load connected to it. What could be the problem and how do I fix it?
Talal A.
Press trip reset button if there is any and try again.
Michael
My UPS won’t supply my PC each time it is plugged to the socket but will only supply on battery. Can anyone help about this please?
Talal A.
Check the input fuse.
Also make sure input voltage is not so high.
Michael
The fuse is okay.
biswaanjan
showing overload even if no load given and UPS is not providing backup
Talal A.
Did you check by removing output plug?
Kunja Bihari Sahu
My microtek inverter sebz900 is connected with invaplus ip1500 (exide) battery. It was working fine for last two years. But now the led I is blinking continuously. During power failure battery backup is good. What is the problem? Please provide the solution.
Talal A.
Is it charging LED that is blinking?
KUNJA BIHARI SAHU
Yes. It is the charging LED which is blinking continuously.
Talal A.
Your battery could have gone weak and failing to attain cut off voltage.
KUNJA BIHARI SAHU
But when the charging LED is steady and inverter output switch is off (supply from inverter is off), after the main supply is restored, the charging LED starts blinking and again continuously for entire day. There is no power drain from the battery during that time. The inverter is behaving in a surprise manner.
Talal A.
You may check the inverter by connecting to a different and relatively newer battery.
Bisi
Hi my luminous inverter is showing th. And its not giving power. What can i do ?
Mohammad Yasir
Hi friends,
I have a DC inverter UPS , it worked for 2 years. But now its red caution LED is blinking continuously , why is this happening. Now it turns the supply off automatically. Even if the UPS power button is turned off, still the caution light is blinking. Tell me possible solution
I will be very thankful to you.
Syed Hassan Raja
Hi guys special thanks for creating a form like this
I have luminous inverter battery inverter is 1050 eco volt it worked fine till one year and suddenly the light i.e when switched on the light from eco volt is not coming and shown on ups can u help
Talal A.
Tighten the battery terminals, clear them from rust and check the input and its fuse.
Arun
On mains and charging indicators are blinking.. Not giving out put also, even after unplugging input, they are blinking. What may be problem?
Muzzamil
I have Homage HEX-2004 ups. Its showing fault 6 on the LCD. Can you please let me know what is this error and how to rectify the issue?
Lawrence N.
My Genus 3.5kVA inverter suddenly stopped supplying power and started displaying “Protection Overload Trip” even when there is no load connected to it. What could be the problem and how do I fix it?
Adeola Samuel
Check the battery cables
Aravinth K
I was working in government hospital there 20 Kva UPS for main op block, its not automatically powering on when main power off. How to rectify this problem.
Sonoi
Why my UPS not enter inverter mode after power failure. Its only at bypass/standby mode. Online UPS type.
Talal A.
Is backup switch on?
Arul
I have Microtek 700 SEZs. Main supply on led stopped glowing even power is available.Inverter working normally.
Balaji
the luminous duo ups is overloading and off during the computer is on and it’s beeping during the switch is off .
Talal A.
Shutdown and restart UPS.
oludare
my inverter of 3.5kva luminous battery not backing up more than 2 minutes when power fail and 2 batteries is 11volts and one is 10volt while the fourth battery is 9 volts
Talal A.
If batteries are old replace them. Otherwise, charger could be faulty.
Girish Anand Mathpal
Sir my Microtek upc is working only in inverter mode
Please help me to rectify my problem
This is single battery UPS
Talal A.
check the input voltage and fuse. Low voltage will cause UPS to run in backup mode. Blown input fuse will also cause the same.
Sojan shrestha
MY Sukam inverter when connected to mains give beep sound and is not working but when I don’t connect to mains it’s working fine all…what is the problem???
Talal A.
Check the input voltage. Make sure input is not reversed causing short circuit in case you have just supplied phase from inverter to appliances and connected output neutral with mains wiring.
Also run it without connecting output to check its response.
Ad
Sir i have asiapower ups used. But my ups heating after 30 min…please reply
Sir is heating problem normal in ups
Talal A.
Does it trip after 30 minutes?
UPS will blow hot air when running. It’s rectifiers, inverter circuit, transformer and other components generate much heat thus a fan is required to keep it cool.
Ad
No sir ups does not trip its backup is good it gives 30 min backup. please tell me heating if problem is normal. i have also checked by technician
Talal A.
How hot does it get?
UPS will get hot with the heat of internal components and that is normal.
Soumik
I have a Vguard 300 va digital ups with external battery I have used 42ah battery but recommended is 60ah battery. for some time it worked well but now after few operations it goes to overload even without load what can be the solution
Talal A.
Get it checked by a technician.
Mthabisi
My inverter keeps on dropping all the loads and restarting again, it functions as a UPS system
Talal A.
Mention your inverter make and model number.
Ben
My 10kva will supply for some seconds with the buzzer and cut off, then start again for another seconds and cut off, it will repeat it for 5 times and then go off, please what could be done? Thanks
Talal A.
Any fault code displaying on display?
Nanda Ballabh Tiwari
I have a LUMINOUS inverter. Smart charging button is continuously on with noise since last 24 hours. Please intimate reason
Nitin
My inverter switching to mains and inverter mode alternatively even when main supply is on. What could be the fault and what is the remedy for this.
Talal A.
Check the voltage of mains. It could be too high or too low.
Rahat Ahmad
My sukum inverter 600VA working properly but main+charging and inverter on indication light doesn’t show fairly. It show dim.
Talal A.
May be the connection is weak.
baba T shanka
my inverter is showing overloading , the fan will work for some seconds and goes off, immediately the inverter will show overload,
what do i do?
Talal A.
Run it without connecting anything and observe its behavior. If it does the same the inverter is malfunctioning. Otherwise, fan is causing overload.
Rajesh Kumar
My luminous inverter is providing very fluctuating output with a sound khat-khat.
Please suggest what to do ?
aziZ ahmed
I have aome chinese made inverter when load shedding I use it but I notice voltage is getting higher and lower not sustained kindly suggest
Talal A.
Several chinese inverters are built that way. When load is put on them, voltage starts rising. Otherwise when idle, voltage stays low.
Ranjeet
My microtek inverter usbEB 900 single battery not auto cut charging after full charging.
Charging continues not full any time. Light come full.
And battery back up also good 8 hrs.with one fan , two led bulb , and one led tv.
Talal A.
Flooded (wet) battery: Always use distilled water to top it up. Make sure electrolyte was also prepared with distilled water.
Kashi Nath Mandal
Sir,I have purchased a luminous inverter 1450 Shakti charge plus and installed in home all going well but after 8 days used on backup approx 6 hrs only 3 ceiling fan. After 6 hrs mains came but inverter can’t output the main power with backup also displayed all light blinking,we have closed the output and reset but results is zero. Please solve the issue.
Talal A.
Take it to service center to claim the warranty.
shekhar palshikar
I have iball ups. It has new battery but backup is inly 40 seconds.. irrespective of load.. I connected 15W CFL that too 40 sec.. how to change the backup time.
Talal A.
Take it to the person from whom you bought it.
Abdul Rehman
Salam , using homeage, UPS is running continuously switching to inverter mode despite of main electricity presence.plzz help
Talal A.
Check the input voltage. If it is getting lower than threshold, inverter will switch to backup mode. See if there is a narrow-wide switch on inverter. Choose wide and see if problem gets fixed.
(If voltage is normal then there could be some problem in inverter.)
pramath
my exide inverter supports my tv and music system on power cuts but my computer shutdowns and start agains, what i have to repair inverter or there is another solutions?
Talal A.
Your inverter switch over time is longer than what power supply of computer could afford. Connect a large capacitor with output to see if it works.