Question about Delta Vfd220b43a Ac Drive Vfd B Inverter 30hp 460v

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Why my Delta invertor digital keypad VFD-PU01 LED display no power supply?

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When i turn on the drive it display it display code for ground fault. my wiring are correct. And i cannot use keypad of drive. how can i resolve the fault .


why cant you use the keypad/'display of drive, is it not lit up ? if so you most likely have a grounded phase on the load side (motor) I suggest disconnecting motor completely and measuring to ground with a high voltage tester (megger) if you have a phase to ground then all the power that drive puts on that wire will shunt to ground , causing infinite current , this will affect the power supply of drive and not allow drive to even power up correctly
also you failed to mention if motor was 3 phase if so , some drives require installer to remove shunt jumpers (see install directions) this will "Lift" the surge suppresors off earth ground and over to "virtual" ground that occurs at center of three phase power , this might be seen as a ground fault if this is not done correctly

Jun 12, 2015 | Delta Vfd750b43a Ac Drive Vfd B Inverter...

1 Answer

The lighted display has started to darken - cannot read frequency display, etc. Is there a way I can fix it by changing a bulb or an LED?


This problem is not depending on a kind of LED or bulb. The reason is that the display is a VFD (Vacuum Fluorescent Display) with no additional illumination.
The most common problem with VFD is, that the heater of the VFD is going bad. You can't change it because it is built-in. For experienced repairman it is possible to higher the heater voltage or the anode supply to gain the brightness a bit. But thats a tricky thing.
Sometimes it may help to clean the display cover from inside. This is what you can do first. The reason for getting dark by dust inside the cover is that the VFD is working with a anode voltage wich is a bit higher (about 30V - 50V). This sucks the very fine dust electrostatically into the casing.
To clean up the protective display cover from inside, remove the casing and also the cover in front of the VFD and clean the dsplay protection cover (the VFD istself is usually clean). Maybe that's it - but maybe not (that means the VFD is going bad).
Hope it helps.

Oct 14, 2013 | Aiwa AV-X120

3 Answers

Password of inverter


forget the password how can i solve it

Oct 18, 2012 | Delta Vfd007b43a AC Drive VFD B Inverter

1 Answer

Whirlpool 6mt 42 microwave oven digital display


It's probably a weak VFD tube but it may be that the rear of the display window and front of the display glass are very dusty.

Sometimes you can clean it inside to brighten it up.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Then you can detach the keypad connector (as per attached photo) then remove the control panel screws.

Be careful not to crack the glass display when handling it, or it's a goner.

Then you can use a soft cloth (not a paper towel) and a mild cleaner (not ammonia-based) to clean the front surface of the VFD display glass and the rear side of the clear bezel (display window) that's attached to the keypad.

Direct spraying of cleaners on the keypad and steam from the cooktop can damage the controls.

I always recommend that you spray non-ammonia cleaner on a soft cloth (not a paper towel which can scratch) and gently wipe the keypad.

40716d4.jpg

Some connectors have a lock.

positivelock.jpgIf that cleaning didn't help, then you have a weak VFD.


On a Whirlpool microwave, the VFD tube is almost never available separately, so if it's bad, you would have to replace the entire circuit board.

You can find links to helpful exploded view diagrams and order parts here.

I'd recommend that your bookmark this link to your favorites.


We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Sep 03, 2012 | Microwave Ovens

1 Answer

Were can i buy delta vfd at dubai


can u give ur tel no:i want to buy 1.5 kw delta vfd

Nov 14, 2011 | Delta Vfd750b43a Ac Drive Vfd B Inverter...

1 Answer

Were can i find delta vfd at dubai


Official Agents for Delta Electronics (VFD, PLC, Servo Motor, Servo Drives, Temperature Controllers, Communication modules and devices) in UAE, Dubai is ARPI Industrial Equipment.

Check the website.
http://arpiie.com/index.php/motorsdrives/acdrives

Nov 14, 2011 | Delta Vfd750b43a Ac Drive Vfd B Inverter...

1 Answer

My digital display is so dim you can barely read it. anyway to brighten it up?


It may be a weak VFD tube or it may be that the rear of the display window and front of the display glass are very dusty.

Sometimes you can clean it inside to brighten it up.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Then you can detach the keypad connector (as per attached photo) then remove the control panel screws.

Be careful not to crack the glass display when handling it, or it's a goner.

Then you can use a soft cloth (not a paper towel) and a mild cleaner (not ammonia-based) to clean the front surface of the VFD display glass and the rear side of the clear bezel (display window) that's attached to the keypad.

Direct spraying of cleaners on the keypad and steam from the cooktop can damage the controls.

I always recommend that you spray non-ammonia cleaner on a soft cloth (not a paper towel which can scratch) and gently wipe the keypad.

40716d4.jpg

Some connectors may have a lock.
positivelock.jpg

If that cleaning didn't help, then you have a weak VFD.

On this model, the VFD is not available separately, so you would have to order a new control circuit board for it.

You can find links to helpful exploded view diagrams and order parts here.

I'd recommend that your bookmark this link to your favorites.


We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Dec 17, 2010 | Maytag MMV5186A Microwave Oven

3 Answers

How to reset delda vfd43a


pls. set paramter 00-02 to 10 to this is to reset delta vfd b-series

Nov 04, 2010 | Delta Vfd007b43a AC Drive VFD B Inverter

1 Answer

I have vfd b 380v invertor some body repalced his


You will have to check your specs, some will and some won't.

Nov 19, 2009 | MSI Microstar KT6 Delta (MS-6590)...

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