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Powerware 9330 Inverter tripped

Inverter does not start, inverter tripped off the alarm

Posted by cnunez444 on

  • Miguel Vargas Jun 21, 2013

    I have a UPS powerware and in this moment this present an alarm: inverter tripped in the screen..somebody know the solution?.



4 Related Answers


  • 1 Answer

SOURCE: powerware 9330

your problem could be related to a dispay board or possible CSB board.

Posted on Jan 05, 2009


pravin bhavsar

  • 348 Answers

SOURCE: My UPS Powerware 9120 6kva. At inverter section.

no but I can tell you that for old ups mosfets are used and for new ups IGBT (insulated gate bipolar transistor )are used the IGBTs are not available on shops you have to take help of company

Posted on Mar 08, 2010



  • 39 Answers


You pose an interesting request. For the batteries, why would you need 20 batteries as the PW9120-700 has 2 internal batteries, the PW9120-1000 has 3 batteries, and the PW9120-1500 has 4 internal batteries? If you want extra batteries to sit on the shelf as spares, they will self-dicharge to dead if not recharged every 6 month. The Haze batteries are the usual Chinese junk batteries. I have done a load test on all in my shop. The only batteries for the PW9120 that I will use are the PowerSonic PS-1290 F2, rated at 9.0 Amp. Hr. These will fit and the 9.0 amphr rating is the only one that will match the original battery life.
For the circuit board, I assume you are looking for the large PC board inside the UPS. These are probably hard to find - maybe Gruber in Phoenix can help you. Are you having problems with the IGBT's in the PW9120? Usually other problems occur in the PW9120's, not the inverter.

Posted on Feb 08, 2011

Mike DeCamp

  • 45 Answers

SOURCE: I have powerware inverter type

Here is the 9395 documentation page: You can also leverage the hardware support forum:

Posted on Jul 07, 2011

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It is most likely the low voltage alarm. Suggest connecting when the car is running with no load (110 volts not connected). If the alarm continues turn the unit off and on to reset.

Hope this helps?

Inverter Protection Features
• Short Circuit Protection. The inverter will automatically shut down until short is removed.
• Low Voltage Alarm. An alarm will sound when the voltage from the battery discharges to 10.5 +/- 0.5 volts DC. This is an indication that the battery needs to be recharged.
• Over Voltage Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the input exceeds 16.5 +/- 1 volt DC.
• Under Voltage Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the input is less than 10.0 +/- 0.5 volts DC.
• Overload Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the continuous draw of the equipment being operated exceeds 1200 watts or the surge draw of the equipment exceeds 2400 watts.
• Thermal Protection. The RED LED Indicator Light will illuminate and the inverter will automatically turn itself off when the circuit temperature exceeds 150° F

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3 Answers

Invert trip ups trip dc link unbalance failer

Hi Ahmad,
I've got same issue on the same UPS generation last week we tried to solve the issue by changing some dead batteries but without success, it tripped a gain with same alarms.
I hope someone answers our question ASAP.

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2 Answers

Always showing alarm EOC,EOP

The system that you described is a closed-loop system. The inverter tells the motor what to do and the encoder send information back to the inverter to verify the operations.

With out knowing part# and serial number of the unit in question, I do not know exactly which inverter you are having problems with.

With E.OC error, there is a lot of current demand on the inverter. This could mean a short in the motor, motor leads, connections or inside of the inverter. This could also be caused by the encoder feedback loop being defective. If the inverter tells the motor to run at 1000rpm and the feedback tells the inverter it is only running at 5rpm, the inverter will send out more current to get the motor up to speed.

Since you are getting multiple errors, there could be other internal problems with the inverter especially if the unit is old and contaminated internally.

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1 Answer

I have a 24 volt 5000 watt pure sine wave inverter that keeps tripping. It has 28.6 volts going in from the battery and 115 volts going out at 8 to 12 amps any suggestions.

It sounds to me that you have a load that draws too much from time to time. If the inverter will run without a load without a problem, try adding loads one at a time until it starts to trip off. That should give you an idea as to what the problem is. It could be that there is a problem internal to the inverter that causes it to trip prematurely..

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1 Answer

I have a Cobra 1500W power inverter. The alarm is going off when the inverter is shut off. I drive a truck and have unplugged all appliances from the inverter and the alarm is still going off. What

I can only give some general thoughts on this, I have patched up a few inverters.
Their core parts rely on a component called capacitors these over time degrade with heat which reduces their manufactured value this will mean they fail to fully do their job. The usual result is not providing a smooth supply rail allowing voltage spikes which trip over and under voltage sensing firing off the alarm, more so when not loaded with appliances as spikes can become large.
Your appliances would be snubbing out these through their loading but this can be trouble because they are absorbing this extra energy which may damage them eventually.
This situation will possibly get worse with the inverter failing, it will need a service engineer to work on it or to purchase a new one if there is no local regional repair place.
Look up faulty capacitors in power supplies on the web for an insight.

Hope this helps........

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1 Answer

Grundfos cue inverter drive with a pump CR45-2 is showing an alarm code of 16/47 and 16/1 we cannot figure out what is tripping this alarm how can we trace this down and get corrected

this caused when you dont have rt guage cable to provide correct voltage,what wattage of inverter you have,if it is a 1000 or more you may have to have a 6 guage cable or 4 if more than 1000 watts

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1 Answer

Omron inverter J7

try putting a load of 1 ton, if it trips , the overload control for your inverter is bad

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Tightened up battery connections

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