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Solutions for UPS and Power Inverter Problems

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]

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1,468 Comments

    « Older Comments
  1. Anand

    i have one 20 kva UPS .We have observed the alarm “Invertor and mains not getting Synchronised”.Can you give suggestion please.

  2. Brian Mbewe

    I have 3.5kva luminous Cruze plus, the inverter is showing; I/P VOLT : Fail and FREQ : – -, -HZ when using it without being charged by electricity . It is not producing any power on the out puts. What is the problem and the solution?

  3. Mohamed

    Inverter displaying “short circuit”

    Hi everyone,

    A bluegate inverter circuit displaying “short circuit” as a fault condition even when the output is isolated from the load. It seems the fault is from the inverter circuit itself and not the load.

    Please what could be the cause of this fault condition?

  4. Aniekeme

    Sir,
    I bought a new luminous sine wave ups inverter 1100 last month. When supply is given, it displays BTP. The catelogue shows the reason “input mains MCB tripped”. What is this?

  5. Alex Basu

    I have Numeric 5KVA ups. It works fine when there is electricity. But when I turn in the Generator,only the mains gets power,but the converter button goes red. Is there any problem with my Generatot Set or any wiring problem.

  6. Mohammed Arif

    i have luminious 2 kva online ups it was working fine but one with sparking sound it stopped working on offline mode i beeps continuously and after power on it gives long beep it seems that there is some problem how can this problem will be solved

  7. Abimotek Babslaw

    Hello my inverter MODEL (XPR)1200VA, while i power switch on AC even charging display ok, but after i press switch button on battery it showing on screen fault and only red light on

  8. ASHOK BASTIA

    Hi I use v- guard du 600 model ups. The problem is all the LED blink & no out put voltage. What is the problem . how to solve it.

  9. Igweh Fredrick Ndah

    My 650 and 1200 mercury ups when powered to a electricity gets power and its Ok but power cannot leave the ups and power appliances. What is likely to be the problem and how can it be solved?

  10. Sharmistha Tripathy

    Hi I am having a luminous Zelig 1100 inverter.Surprised to see something when there is current supply it goes to power on mode and within minutes it beeps and light and all connected to inverter goes off.When there is no power it shows charging mode and keeps on fluctuating every 2-3 minutes.I don’t know what to do.

  11. Pardon Macheche

    Hie I have an Ellie’s 12v Inverter with battery charger, when I switch it on it shows AC output Voltage and displays fault 0 with a continuous beep sound. I have checked all the MOSFETS they are fine, what could be the problem?

  12. Abdullah

    Inverex vm 2 fult 09

    • Abdullah

      What’s is solution

  13. Hamilton Boniface

    Hi good day I have sukam 3.5kva it is outputting but once it is on the mains it will be showing me MCB trip off have, tried all I could to solve the problem but still the same so i need your help please

  14. Ehtesham

    Hi i have mercury inverter 2.4 volt. Yesterday evening it start beeping buzzer continuously without stoping. What should i do now. Please guide.
    I have checked all above guideline accordingly and it seems correct.

  15. Uma Maheswari

    What do you mean by fuse blown in inverter

  16. Amrendra Singh

    Luminous tez900va cuntinue charging light blinking and low battery light blinking

  17. vikrant

    i have Su-kam inverter
    Model : Falconeco 1000/12V
    problem is regarding 3 pin input plug which we insert into the power socket to get the mains supply.
    mains supply was down & i was not getting any backup from the Inverter.
    so i checked the negative & positive wire of the 3 pin plug with the current tester but both the wires is showing current. what could be the issue.

  18. Saju

    Usha Zentra 600 VA Inverter how to reset

  19. Irfan sheikh

    My 3kva brand new solar inverter batteryless is not giving output power the volts are coming from the solar panels 200v
    No amps are showing up.

    Please guide zero power

    • Talal A.

      Are you sure 200V input?
      Make sure you have turned on backup mode by pressing backup button or from settings.

  20. Manjunatha st

    Hi
    I have sukam brainy solar 1600va inverter
    When solar charging, inverter show low battery. how to fix this issue. solar power is sufficiently available. When pv off, it’s working good

  21. Venkatakrishnan

    ups on light is not turning on in our Microtek inverter. Battery is charged and mains on lights are working. What is the problem and what might be the solution?

  22. Mukhtiar Sunder

    I have 3kva inverex inverter.
    Sometime it restarts even with in few minutes interval. Mostly it works smoothly.

  23. Umair

    Homage Tron Duo 5KVa inverter is working fine but does not show anything on lcd screen or even leds are not working.

  24. Anwar ul haq

    My ups showing short circuit fault.
    How i rectify that fault.
    Pleas guide me.
    Ups company name is NS
    1 kw

  25. Prem

    Mains on and smart charging lights are blinking .

    • Vincent

      I have 3.5kva luminous Cruze plus, the inverter is showing; I/P VOLT : Fail and FREQ : – -, -HZ when using it without being charged by electricity . The current it generate makes the bulbs blinks but not too visible. What is the problem and the solution if any?

      • Talal A.

        By blinking, you mean when they are turned off but still blinks after every few seconds? If that’s the case, then it’s caused by stray voltage in neutral. You may ignore that.

  26. bijay sharma

    i have microtek 625E2 inverter .why it produces sound and vibrate and gives extra voltage it fuses the many bulb of my house what to do

  27. deepak

    inverter showing short circuit code on screens even if raw power and inverter output plug not connected

  28. ram

    Iam using Micro tech 24*7 UPS Continuous charging cutoff not happen reason

  29. Mohamed Atia

    Dear sir, i have BORRI UPS 60 kva it give me A13 INVERTER OUT TOL on the screen and it work on bypass please i need solution ASAP

  30. Zuhaib Farooq

    I have Luminous sine wave 1100w inverter. Showing btp on display and output doesn’t work while changing..no output power supply after showing btp on display. What does that mean?

    • Anuj Dixit

      Hi Zuhaib,
      Is your problem resolved? I am having the same issue. My inverter showing showing BTP and no output power supply.

      • Zuhaib Farooq

        Actually it is not a problem in inverter..you need to check battery.Ths problem occurs because of low gravity levels in battery.

      • Sonam Phuntsho

        Why my 5kva ups is giving out put when power fails?

  31. P K Choudhary

    My inverter Microtek from last 10 days gives beeps sound every now and then when automatically shifted to charging mode.Sometimes charging point works sometimes only mains.The auto shift to UPS is okay.

  32. Srikanth Reddy

    I have luminous 1100 sine wave, it is automatically going into battery mode and not taking power, even though electricity is there, then automatically after 6-7 hours it starts charging, everyday same problem please suggest solution ASAP, thanking you

    • William

      Have a falcon inverter, when connect the battery and switch it on I get the output properly but when I test the input top plug before connecting to mains to charge, I see voltage on it what is the problem, when trying to connect to mains the fuse gets damaged, what’s the problem

    • Jayaraman Thangaraj

      I have bought new exide inverter 1050 va pure since wave only 4 days ago and this problem coming, long beep sound (backup and charging indicator light blinking same time with sound). How do I solve the problem

  33. MOHAN NEGI

    I have Sukam Home UPS 600VA Pure Sine wave. It’s just lying spare. I wanted to charge my Car Battery with it. But when I turn it on main power supply it start beeping continuously.
    Why it’s doing so? Can I continue charging my car battery or should I stop it because it’s making continuous beep noise

  34. ichank

    I have ups powercom 6 kva ,lcd back light on and all button on panel not function , all led indicator off how to fix that..?

  35. « Older Comments

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