MARS ONLINE UPS 5kVA to 20kVA (3in 3out)
MARS ONLINE UPS 5kVA to 20kVA (3in 3out)
MARS ONLINE UPS 5kVA to 20kVA (3in 3out)

MARS Online UPS 5kVA to 20kVA

MARS ONLINE UPS 5kVA to 20kVA (3in 3out)

MARS UPS is a compact size double conversion true Online UPS. It is a DSP based high frequency PWM technology UPS built with Single Control Board. Mars UPS are highly efficient system with minimal internal power loss.

It provides an independent, no break source of clean, stable, transient free uninterrupted power supply with output neutral bonded to the ground. This protects critical loads against power line disturbances and loss of commercial power. It provides Regulated Sinusoidal Output Voltage under several Input conditions such as power failure, surge, sag, spikes, noise, frequency instability and harmonic distortions. The true advantage of the MARS Online UPS is its ability to provide an electrical firewall between the incoming utility power and your sensitive electronic equipments.

MARS UPS comprises of a rectifier, an auto float cum boost charger, battery backed inverter with under voltage, over voltage, short-circuit protection along with a high degree of Input to Output isolation. The amplification stage has IGBT technology for pure sine wave output.

Available In:-
5kVA to 20kVA in 240V  and 360V DC voltage
Three Phase in – Three Phase out



1) System is not ON

Check Crystal.

Check On-Off Switch.

Check 3.3V and 5V.

Check DC sensing. It should be not < 1.45V and not > 2V.

2) System is ON and output is present, but not controlled

Feedback Transformer (0-10) may be faulty.

Preset O/P R, O/P Y1, O/P B1 may be faulty.

Output feedback connector may be loose check AC voltage at feed-back connector.

3) Computers/ Load is resetting (turns OFF and ON itself)

Front ON/OFF Switch may be faulty.

Check 7 pin CNG Male Connector fixed in the inverter card.

Any pin may be dry or loose.

4) Load is resetting (Turns off and On)

Check IGBT wire and power wiring of battery. It may be loose connection.

5) No AC output on Mains fails.

Check the position of Bypass switch. For inverter output, its direction should be either OFF side or Bypass side.

One or more batteries may be faulty. For checking one by one, turn the Mains OFF, turn the inverter ON and turn the entire load OFF or lower the load. Now check the voltage of each battery. If any battery is discharging faster than others, it may be faulty.

6) Less back-up time

Check charger voltage it should be 13.3V/Battery.

Check battery cut off voltage it should be 10.0V/Battery.

7) Overload in low or less load

Check resistance across the C.T., it may be open.

Overload Preset R70, R71, R72 may be faulty.

Check reverse phase from O/P.

8) System not Sensing Mains

Check AC MCB it may be loose or OFF.

Check I/P connector at PCB.

Check I/P voltage it should be  170 to 260VAC.

IN4007 diode of power supply or power supply fuse may be faulty in charger card.

9) Humming Noise in UPS

DC choke may be faulty or loosely connected.

AC capacitor of O/P transformer may be faulty.

Fan may be faulty.

10) A/C I/P MCB tripping repeatedly.

Check charger IGBT module.

Check charger bridge or diode module.

I/P MCB may be faulty.

DC capacitor may be faulty.

1. Connect batteries to the UPS

    • Check the polarity of batteries.
    • Connect batteries in series to make the required DC voltage.
    • Connect the red wire to the positive terminal and the black wire with the negative terminal of the battery. 

2. Rectify if Mains not being detected

    • Check the Mains LED located on the front panel of the UPS.
    • If the LED is not glowing then, check the (input) Mains MCB.
    • If the Mains MCB is in off condition, flip the MCB to turn it back on. 

3. By passing the supply

    • If the system ceases to operate properly, then it is advised to put the system in bypass condition.
    • For by-passing the system turn the Bypass knob (red and yellow in color) located at the back panel of the UPS.
    • Turning the knob makes the system enter in Bypass condition.
Note **
when in by-pass condition, the appliances connected to the system would run directly on mains.
4. Reset the system when under overload

    • When in overload condition the overload LED will starts to glow.
    • The system to prevent damage undergoes shutdown when excess load is applied to it over a long duration. 
    • To turn the system back on, remove the excess load that is applied to it.
    • Press the power button in order to reset it which is located in front of the UPS.