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Just get an old appliance cord, cut and strip the end and terminate with whatever terminals you like.
So, because I can hear it I can assume it is a spark and if it ain’t where its supposed to be I back track?
Exactly!
What I hear you say is the spark modual is sending voltage towards the spark electrode. It doesn’t make it because of a problem withe spark wire.
Correct! This problem is usually a wear spot in the spark wire insulation or breakdown of the insulation enough so that it allows electrons to “jump the gap” from the wire to the chassis before they reach the electrode. Hence the different sound (muffled or fainter) than the other electrodes.
What I actually heard was the spark module producing voltage?
Technically, you don’t hear the voltage. You’re hearing the electrons jumping the gap and interacting with the air as they do so.
The gap is what produces a spark.
Again, keep in mind what the spark actually is: electrons jumping the gap. Electrons are moved by a voltage difference between two points. So it’s not the gap that produces the spark, the voltage difference does that. The gap is simply part of the path the electrons follow in their quest for electrical neutrality.
Or is there actually a spark jumping vs voltage coming from the spark module?
Not sure what you’re asking here. But the spark module produces the high voltage difference necessary for the electrons to “jump the gap.” If that gap occurs before the electrons reach the electrode (as explained above) then they will take that path instead of the intended one at the electrode. The electrons are effectively shunted by the defect in the spark wire.
but isn’t the electrode getting a small spark?
It sounds like you’re assuming there’s still a spark occurring at the LF burner. If so, then this is an assumption and was never stated as a fact in your “observations.”
Also, think about what the spark actually is. Physically, the spark consists of electrons jumping a 3 mm gap when there is a sufficiently high voltage difference between the electrode and the burner surface. You’re only able to see it because the electrons are reacting with the air molecules as they travel.
Re-read the observations from the problem that Sam quoted previously. There’s a phrase there referring to the difference in sound. HINT: That ain’t no throwaway line!
Voltage doesn’t move around a circuit the way electrons (current) do. The center tapped on the secondary is at ground potential, which is defined at 0 volts. So even though Neutral will carry full circuit amps, it will be at ground potential. This is why you can grab the Neutral cable in your circuit breaker box and not get electrocuted even though there could be 200 amps on that line.
The ADC, whether standalone or part of the main board, is a peripheral computer executing a software program. This board is programmed to monitor various use conditions (eg., door openings) and temperatures to determine the frequency and duration of the defrost cycle. As with all computers, garbage in = garbage out. What if some of those inputs, such as temperature, are lying to the board?
I want you to focus on finishing your coursework here at MST instead of posting questions at Appliantology.
It depends on what type of compressor that are present in the system, I think. They will also determine the start device or inverter, right?
The particulars of each system will vary but all the components in each system (compressor, compressor controls, etc.) will function exactly as they would if it were a single compressor system. If you have a FUNCTIONAL understanding of systems and components and you can troubleshoot a single compressor system, then you can troubleshoot a double compressor system because all the same functionality applies.
Yes the labeling really threw me off. VCCI sounds super intimidating and I did not even know this was a dual compressor system.
Stop getting hung up on labels and use what you’ve learned to deduce the FUNCTION of the component you’re looking at. I could see a box on a schematic labelled “VBGTRRRKF” and would have no idea what that stood for. But if I see that the VBGTRRRKF connected to a BLDC compressor, then I know that the FUNCTION of that VBGTRRRKF box is an inverter and it works like any other inverter.
FUNCTION not labels. Keep saying that to yourself as you review schematics and as you fall asleep at night.
If you asked me to diagnose the VCCI inverter thing, I don’t know how to.
Why? Because the label is different? If something is labeled “VCCI” does that mean it FUNCTIONS differently from any other variable frequency drive system?
There has to be something different about how you diagnose a double compressor system.
Now we’re getting somewhere! What do you think is different in a double compressor system from a single compressor system?
Now you’re asking a different question. Let’s stick to a linear thought process. Please answer my question and we’ll get to your next question.
About what exactly? If you know how to troubleshoot a single compressor system, how is this different from troubleshooting a double compressor system?
VCCI – Variable Capacity Compressor Inverter. In other words, an inverter for a BLDC compressor motor. It works the same way as any other inverter in a variable speed drive system.
October 17, 2019 at 10:34 pm in reply to: Module 4 Unit 7: Split Phase Compressors and PTC Start Devices #17304Do you understand how the PTC start devices function in the circuit?
There are a few types of start device
How many types do you think there are?
How do i use the Supco UPRO41 devices?
They would function the same way as the original start device. If you know how the start devices function in the circuit, then you know how these function and how to use them. If you don’t understand how start devices function, then please rewatch the videos and review the lessons— this is covered in detail in the course.
Do you have a specific troubleshooting question?
Can i unplug the refrigerator and test the sensor from the control board?
This is exactly how you should do it!
Some manufacturers will also give a voltage drop in addition to resistance. This is even better because it’s a more reliable measurement and you don’t need to disconnect the thermistor harness from the board, just back probe the harness connector.
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