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Vfd sj300 don't have wiring diagrams?

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Vfd sj300 inverter looks like hitachi make inverter. if thats the case give me a mail for drgs.

Posted on Nov 24, 2008


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How to solve the GFF error in delta Vfd-g

A GFF error on most Vfd's refer to a in-proper ground, no ground detected , or a possible ground loop. Ground loops are a common mistake, where in the attempt the user grounds two or more devices or the load to the vfd as well as the mains ground.

the model your using is a three phase input, it can handle delta or wye, style of wiring, but all require a good ground source. If anything, just run a dedicated ground to each device and don't run ground wires to each other. It's only used for voltage reference between the phases. Without it, the vfd cannot work properly and will error.

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Juki SC-800 3phase. How do I make it run on single phase? Tried VFD. Gives alarm 0001 and beeps.

If a VFD won't work you are best to obtain a single phase motor of Chinese origin. They are inexpensive and available widely on eBay. Just make sure to get one within the rating of your fixed supply wiring. You can also get mounting plates of different sizes.

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Problem With Eaton 9000x VFD drive. All voltages are good. Cannot get drive to activate motor.

Check the windings of the motor at the VFD output. Start by killing power to the VFD. Next, check for voltage on L1, L2 & L3 and U, V & W line to line & line to ground. If all indicate zero, connect an ohm meter from U to V, then V to W and finally W to U. You should see a very low resistance - single digit ohms. They should all be the same value. If that check so out, test from ground to: U, then to V and finally W. This should indicate a very high resistance - 1 meg ohm or more. Do NOT attempt to use a megger to measure ground to U Vand W while connected to the VFD terminals! Low numbers indicate that the insulation on the windings inside the motor are breaking down, and some current is flowing in the ground wire which is dangerous. If all these checks are ok, the likelihood of the motor being to problem is minimal. You should be able to start / run the motor without damage to it at full line voltage - assuming it can start the load at full speed - and that the load can be safely started at full speed. If no to those questions - you should decouple the motor from the load before proceeding. Next, try running the motor "across the line". Many VFD provide such an option and call this "bypass mode" or sometimes "Manual"

Doing this will cause the motor to appear across the *full line voltage* and the motor will attempt to come up to 100% speed *as fast* as it possibly can. If the motor starts & runs, the issue is related to the VFD itself. You may have a loose control wiring, open input / output fuses, etc.

Review the manual with your options, here.

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HITACHI SJ300 Problem

The only thing I found is the complete service manual which may help you repair individual units---finding parts may be another issue.

Jun 10, 2012 | Televison & Video

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Thermal overload occurs

I too am experiencing an "oc2" on my gvx1000-1.5-t unit after replacing original motor with near identical, however, relacement motor is rated for 60hz and the vfd is programmed for 50hz. but I don't have a manual nor does my machine manufacturer, so I'm trying to source a manual to alter the vfd parameters for the new motor. My original problem was a locked shaft on the original motor and caused the oc2 fault, but I bent the shaft trying to break the motor flange free and now my spare won't work either :-(. Try removing the load from your unit and see if you still get a fault, if so, you probabley have an enternal problem with the vfd. if by removing the load you don't get a fault, check for anything seized in the drive components, including the motor shaft itself(bad bearings will do it!). An amp test of your load, if it runs long enough to test, will tell you if you're exeeding the vfd's programmed full/max amp set point. Adjust the set point or remove the cause of the excessive amp pull. Good luck. Wouldn't happen to have a manual on the unit I'm looking for, would you?

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

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extend your red and yellow wires straight to positive battery terminal and the black to the negitive . the rest is speaker wire that you trace by looking at what is connected to each speaker.

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Power but no display to unit

Not sure about the Neff brand, but in general you'd want to check for 110VAC power on the primary side of the low voltage transformer on the control panel / board. If that is present, check the secondary for voltage, about 12-30VAC. If the unit has a VFD type display, there will be a heater filament supply, usually around 2.5-6VAC. Also look for bad connecitons on the VFD. If those voltages are present, check connections on the board, look for bloated / bulging capacitors, shorted diodes, breaks in the board, etc. Also look for thermal cutouts and thermostats. If this doesn't fix it, can you take several photos of the inner parts and circuit boards?

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