Question about Lincoln Electric LINK2400-+2 CV-305 MIG Welder with Options Input Power: 23

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Marquette model m02195 wire feed,seems to start with a dead short or max draw,I was told that the main transformer was shorted, I have replaced the main transformer an it did not help

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Posted on Jan 02, 2017

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SOURCE: i visited with heatman101 a while back,i replaced

Shotgun replacing parts is NEVER economical or a good idea without analyzing the exact cause.

It is likely there is a failure of the rectifier or inverter semiconductors. Put a large light bulb in series with the power to the transformer only to do testing. This will limit the current so that you can look for shorted part. Expect switching transistor failure or possibly a diode. I am not sure if your unit has an inverter... If not, a shorted rectifier diode is MOST probable to start with... Note that transformers rarely fail and if power is being switched by the relay, it was not the problem.

Posted on Dec 02, 2010

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check your ground wire everywhere its grounding out somewhere change the liner in your gun

Posted on Dec 17, 2010

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SOURCE: Wire feed motor stop working.

Sounds like a broken wire in the cable from the trigger to the control board - or the switch in the handle is crapping out.

If it's had a fair amount of use, or has been bent into some seriously oddball or tweaky positions, it might be time for a new feed line and trigger assembly.

Posted on Jul 06, 2011

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Have replaced transformer, worked for a couple of days and goes back to relay kicking off

If you have had to replace the transformer, then you probably have a relay that is pulling to much power and/or the thermostat wire may have to be replaced. Most transformer on controls are 40 watt transformers and at 26 volt it should pull less than 1.6 amps. P=IxE Take a clamp on amp meter to the red wire coming from the transformer on the 24 volt side and measure the current. If greater than 1.6 amps the transformer will start overheating because it is producing more power than it is rated. If this is the condition, then before the control fuse blows if it has one check the amp draw on the various relay coils to see if they are the cause of the excess current draw. Each control coil typically draws 6 watts and for 26 volt control power means the amp draw should be about .2 amps. If you find one more than .2 amp you have found your problem. Coil to check is your main contactor for the condensing unit, reversing valve coil if you have a heat pump, sequencers for emergency heat strips, and fan relay in the air handler for a few. Your schematic should list all possible relay coils. Keep checking until you find the coil.
You could also have a control wire that has its insulation worn down to the conductor, so you may have to check the control circuit for open grounds.
If after finding the coil or open ground, the next thing you need to check is the thermostat wire. Old thermostat wire sometimes have the insulation become brittle and cracked or chewn on by pets or rodents. If you have an coil that is drawing excess amps, the entire thermostat wire can turn into a long heater and can cause the thermostat wire to degrade until the wire short out. I have seen several thermostat wires that have been overheated due to bad coils and the excess heat have causes the thermostat wire outer cover to shrink just like shrink tite and is a dead giveaway that thermostat wire needs replaced.
I know that this is a lot to check, but I have had to troubleshoot the control wiring on a lot of units and now you have the condensed knowledge of my experience on this matter.
Hope this helps

Feb 11, 2015 | Heating & Cooling

1 Answer

What should i replace?

I assume you removed the broken wire and reloaded correctly. So if the power is now reduced I believe the power supply is not running on 220v. This can be from one leg of the breaker being tripped. Check your wiring starting at the main panel circuit breaker, then the receptacle, extension cord, welder circuit overload protector (on back of welder), and then inside at the main transformer. See if you see any burnt wires at the transformer or apparent heat damage on the windings.

Aug 27, 2014 | Welding Tools

1 Answer

Control transformer keeps shorting out

One or more of the solenoids operated switches is your most probable cause. If you have a clamp on amp meter, measure the amps pulled by each component with a solenoid. The reversing valve solenoid and the main contactor solenoid. Each one of the these components are typically rated at 6watts. If your control voltage is around 25 volts, your amp draw should be about .24 amps max. If your transformer cannot be reset without blowing, install a 3 amp inline fuse so when the overload occurs the only thing that blow is an inexpensive fuse costing about 25 cents instead of a several dollar transformer. If your fuse/transformer immediately blows, try looking for a direct ground in the control wiring. If problems has persisted for a while, you may even have to look into replacing your thermostat wire. The control wire travels over the thermostat wire throught the thermostat and excess amps through the thermostat wire can break down the insulation jacket and short to the common wire causing the control transformer to blow. Another thing to check is the condition of your thermostat wire to check if the insulation is shredding off. Old thermostat wire, especially thermostat wire exposed to sunlight deteriorates quicker. Hope this helps.

Jan 10, 2014 | Rheem 14AJM49A01-RHSLHM4821 4 Ton 14.50...

2 Answers

Transformer keeps blowing on the high side after about 15 Min? Have changed out many transformers and blower motor.

Replace the transformer with a 75va resettable transformer.
Check all wiring for a loose connection at the unit and the disconnect and the breaker panel.
Double check ground wires.
Check the low voltage side for a back feed short from a faulty component.
Could be caused from a bad thermostat wire.
Do a continuity reading on stat wires to look for a short.
Do an amp draw reading on the unit to determine an increase in amperage.

Jul 18, 2011 | Ruud UBHC Air Conditioner

1 Answer

Samick sga 120 amp keeps blowing fuses. replaced all rectifier diodes and tranformer seems to be working fine. any suggestions?

Fuse blowing is due to excessive current drain and the the first clue is the blown fuse itself. If the fuse blows with a flash a bang and splatters copper across the inside of the glass you have a hard blow caused by a dead short on the power supply, check for power switch flashing over internaly. Short circuit main filter capacitors. Shorted turns in power transformer primary winding. If fuse just separates check for short on output transistors C to E. Try isolating fault by disconnecting LT pos/neg supplies to output stage. Also check for partial shorts on speakers and speaker wires using an analog ohm meter on low ohms setting.

Mar 27, 2010 | Audio Players & Recorders

1 Answer

Kenmore microwave oven power fluctuations

The magnatron, HV capacitor or the transformer. Dangerous place to work in the High Voltage section. Cap can hold a charge so short to ground after unplugging when working around it. Unplug one at a time starting with the mag and see which one is causing the draw.

Jul 01, 2009 | Microwave Ovens

2 Answers

Spool wire starts to melt while on the spool

1] Switch off the mains power,remove the torch from the machine,ther should be a button or switch on the unit to feed the wire, push or switch these and observe that the wire feeds and dose not heat up, if ok then you have a short in the torch, a new torch assembly is required,if the wire heats up with the torch removed, the wire spool is shorting out, remove the spool and check wiring in and around the feed motor, if you can't see anything check for a voltage from a good earth and on the rollers, if you have a voltage then the motor is faulty.(earthing out) a P.A.T test should show exactly where this is.

Feb 16, 2009 | Miller RENEGADE 180 WELDER GENERATOR MIG...

1 Answer

Sanyo microwave fuse blowing -drawing too much current

Wow, I've never heard of a microwave having a circuit breaker on the main board.

I would suggest that you test the capacitor and the high voltage transformer.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

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

Nov 09, 2008 | Microwave Ovens

2 Answers

Main power fuse blows on my sansui g-5700

my Sansui G-5700 blew a fuse (i think)...where can you find fuses for this thing?

Apr 29, 2008 | Audio Players & Recorders

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