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]
Su-Kam Fusion 3.5KVA inverter issue
> Just with o/p connected works normally with all the loads.
(Battery volt: 50V, All the batteries are in healthy state and connected properly)
> But when I connect the mains it’s giving error saying “Main MCB Trip”, please reset the switch.
however I don’t see main MCB trip, I’ve reset the switch still the issue exists.
I’ve tried couple of times reset the issue still exists.
Can you please me with solution.
Sir, my Exide Tubular battery Model IT 500 for home use is posing trouble.My Microtec UPS Sine Wave inverter indicates full charge but can not take load of even two fans for 10 minutes. Engineer of battery company is accusing Microtec while representative of Microtec is blaming battery. How can I ascertain the exact problem?
How old are you batteries?
my exide inverter 850 inverter display is showing trip and short circuit how to solve this problem
Dear sir, I am using 650 v inverter. I have turned on TV on inverter supply. Suddenly inverter switched off. After switch on it is showing battery low along with all indicator s making notice please guide me to solve the problem
It seems like you connected CRT TV. These TVs have high starting current and could cause overload.
Dear sir, in my inverter continuous beep sound is coming and while power on the button, it suddenly turns off
Sir, are inverter ups indicator works on main supply without connected to battery or not.
They may light up in some inverters.
Su – kam 600VA shows inverter on LED but power doesn’t come out
check the wiring. may be it is not getting neutral or phase wire is not getting current.
Please my1.2kva Mercury inverter is displaying F2 code please what does this implies
Sir, recently we moved to a newly built house. But since then many Led bulbs are getting fused one by one. Incidentally no bulb without inverter connection is damaged! Electricians can not find the problem. Is it a defect of the inverter or inverter wiring? Both the inverter and battery are about six years old.
Modified/simulated sine wave or square wave inverters can burn your LED bulbs. Mostly, if one LED burns in a series circuit inside LED bulb, the whole pack of LEDs will stop glowing.
Our load is 50w means only 4% load connected and power factor is .9
Our load is LED Bulbs
Run this ups by isolating it from wiring and connecting some load directly to its output. If it behaves the same way you should claim the warranty.
Sir , iam righting a proposal to power university on solar inverter , after taking my statistics of the load that is the appliances. I get 114,915 KW . now my questions is how many panel, inverter and batteries that can power the university.
Depends what kind of solar panels you use. You will find smaller panels that can produce more power and vice versa. Panel manufacturers can guide you better.
You need inverters that could supply more than 114,915KW power. Check with the manufacturers.
Batteries size and number will depend on how many hours of backup is required and what kind of batteries you are willing to use with the system.
Hi !
I have an inverter connected to 100 Ah battery .Unintentionally i plugged my PCE-UPS power cord to the inverter outlet , which i already have turned off , so as i immediately heard a sound from UPS like tik tik tik …. i disconnected my PCE – UPS power cord of the inverter outlet .
did that cause any intire trip to my UPS?
Thank u for your patience
Im sorry for mistake :
” ….. inverter , which i have already turned on “
Is it not working now?
Hello sir, we install microtech solar ups with battery backup, when we ON the ups it’s gives ac supply to our load but after some period it gives o/p short circuit on its diplay ,when we restart the ups it work as normally . So what I do to solve this problem…?
How much load are you putting on it and what’s the power factor of this ups?
Edema ups show short circuit
I have sukam shiny 850va inverter
The problem is when the mains is turned on the inverter will start indicating overload without any load please suggest me some idea
Remove any wires or plug connected to output and check again. If problem persists get it fixed. Otherwise, your wiring has some problem like may be reversed polarity when main are restored.
in one online ups, output sometimes goes beyond acceptable range. what is the fault
how much high does it go?
My 7.5kVA 120V sine wave inverter, tripped immediately after loss of power for low battery.But checked the battery terminal with a voltmeter and it gives 131V that indicate the batteries are charged.Few days later, it lasted 13minutes.Two weeks later 4hrs; as against the 40hrs before this fault was noticed.Kindly advise on possible solution.Thank you
Which brand inverter is this? Did you contact the manufacturer to inquire about it?
Luminous Inverter. I am yet to contact the manufacturer. It seems to be okay now but the performance is unpredictable.
My luminous 1500va sinewave inverter displays TH error and goes off, comes on and goes off continuously . I have searched user manual didn’t see any TH Code
Did it start doing this after a thunderstorm?
TH error code may refer to surge caused by thunderstorm or bad grid transformer causing abnormal voltage spikes that can damage your inverter.
panda 610 ups low battery showing after mains on. charging ok but when mains are off inverter continuously showing low battery.
My UPS has AVR to regulate 240V back to around 220V (it’s been working for 2months without any problems) and it just stopped doing that. When I turn on the monitoring software it doesn’t inform me anything is wrong. But it does show that the computer’s power supply is getting all 240V into it instead of regulated 220V, tho it doesn’t show anything is wrong. Sometimes, completely on it’s own, it turns on and starts regulating voltage. Does this mean AVR thing is broken? Should i just contact tech support?
Thank you in advance!
240V is not very high voltage. 220V-240V is widely acceptable range. You should only worry if voltage is way too high for example 250+ and then if AVR fails to step that down you got the problem. Still you may contact tech support if you haven’t already and confirm about that.
Thank you for advice.
Radiant Mix Plus UPS. When electricity gone backup mode starts 10-15 seconds late. Battery is replaced 2 months ago and charging appropriately. Plz help me with causes and remedies.
You need to show it to some technician. In the mean time check that backup button is not malfunctioning.
I have certon home ups . When i m connecting battery its sparking and showing 6 amp and not giving output. Plz suggest me.
Usually minor spark while connecting ups with battery is normal. Make sure you are connecting battery correctly. You need to press backup button on ups.
Dear Sir,
I had purchased Mtek Power long life Tubular battery from Sunrise Enterprises
on 08 August 2016 with invoice bill no. 95 with warranty of 36 months. It has a 18 months replacement warranty.
I raised a complaint as the battery backup was very less . A technician visited and after fully charging the battery could give a backup of less than 10 minutes having a load of only 100 watt bulb.
The technician said he will report same to the company.
After that I received a call from company and they said the battery will not be changed as the date of manufacture is old.
The battery details are:
Battery: M Tek
Tall Tubular battery
Bill invoice No.95
Date of purchase: 8 August 2016
Warranty 36 month
Serial number: GSRC053302037603
What is causing my inverter light to blink when its on
Is your inverter working fine?
i have a 3.5kW Sukam inverter for home use; it suddenly stopped switching on after a lightning struck in our neighborhood. Electrician admits that our house is yet to have earth wire connections. What potential damage could it have sustained or its an inbuilt protective mechanism on display?
Lightning strike is dangerous for unprotected electronic appliances. Earthing circuit can not help if surge comes in phase. You should install surge protector to protect your devices.
In my inverter , the fuse is broken and half of it stuck in it, how to take it out?
Tilt inverter and shake to let it out.
Or use a screw. Screw it into the broken fuse and pull it out.