Susan Brown

[Susan Brown]

It’s a little hard to discuss without seeing a diagram. A shunt is usually created by a switch that closes, so I’m not sure where the switch is in your scenario. When you say the light is “out” – do you just mean that it is off (not lit), or that it has blown?

[Susan Brown]

In parallel circuits, each circuit has independent access to the power supply. Remember my goofy little drawing in Unit 5 showing the “Zen trick” of becoming the load and reaching out to L1 and N? So if one circuit fails open, only that circuit is affected. The other circuits in parallel with it will still have their 120v (or 240v if an L1-L2 circuit)

[Susan Brown]

I have no idea how that is happening. No wonder you were frustrated. I’m sending you a copy of the tech sheet via email right now. If you can email me what you pulled up, I would appreciate it. Either download and attach it to an email, or send a screenshot.

[Susan Brown]

The items I’ve talked about are circled in green. Is this the sheet you’ve been looking at?

[Susan Brown]

Yes, although a shunt is a path of NO resistance, not just least. We discussed this in the Basic Electricity Module of Core (Unit 5).

This is how we explain this particular circuit in the unit:

Think “shunt.” The two orange L1 lines may look like parallel branches of a circuit, but look at the bottom one. It is just a series of closed switches from the beginning of L1 until it reaches the heater; in other words, it’s electrically just like a wire. It is a shunt – all the current will flow through that branch and zero will flow through the branch with loads (timer motor, resistor).

[Susan Brown]

The answers to 4 and 6 come from the timer chart at the top of the page. You find the item you are looking for in the column labeled “Circuit”, then look to the left to see the Cam and Terminal numbers

4. Which timer cam and contacts must be made in order for anything else in the washer to get power?
Circuit: “Master”

Question #6 – Which timer cam and contacts must be made for the washer motor to run in high speed mode?
Circuit: “High Motor”

These units are called “Schematic Exercises” because they are designed for you to practice on them. They aren’t the type of quizzes where we are testing you to repeat information that we taught. On these you have to stretch yourself and apply the basics that we’ve taught. If you get stuck, just ask us – we’re happy to help. You might just have to wait a little bit for the answer.

Let me know if what I wrote to you makes things clear, or do you still have questions?

[Susan Brown]

Hi Thomas,
Hang in there! It’s a crazy day here for Team Samurai, so we couldn’t respond immediately.

There is a lot to look at on these tech sheets, and it can take some time to find what you need. That’s why we have you practice.

2. Which contacts on the temperature selection switch need to be closed to select warm wash and warm rinse?
This answer comes directly from the table labeled, “TEMPERATURE SWITCH CIRCUIT”. The row labeled “warm/warm” shows you which contacts must be closed.

BTW, the switch is labeled “Temp Switch” on the washer schematic.

I’ll follow up with more in a moment.

• This reply was modified 1 year, 2 months ago by Susan Brown.

[Susan Brown]

Hi John,

Did you receive the email I sent after you took the exam? I explained the answer there. (All four of those loads are not in parallel.) I’ll resend it now.

[Susan Brown]

Hi David,

I see that you did figure out both answers that we were looking for on these questions.

The second question is phrased, “As a professional appliantologist, the MAIN thing to remember about capacitors is that they…”
In other words, what is the most important thing to remember? As you figured out – it is the safety concern that capacitors present.

As for the first one that you found weird, I understand what you are saying. We have that question (and a few others in the module) for a particular reason: at the request of employers to make sure that their employees are actually watching the videos and not just trying to pass the tests without watching. We periodically revisit our quiz questions and revise some of them. I’ll keep your comment in mind.

[Susan Brown]

Good! Glad you figured it out.

• This reply was modified 1 year, 2 months ago by Susan Brown.

[Susan Brown]

Yes, the “hot ind lights” operate on L1-L2!

[Susan Brown]

The first part of your answer is correct (acting as returns for each other). The other correct answer is “Because L1 and L2 are 180 degrees out of phase with each other”

[Susan Brown]

You got those questions correct on the quiz – do you still need help?

[Susan Brown]

Question 7: see the slide starting at about 7:40 in the second video. The signal is sent TO the inverter board.

Question 9: see the Troubleshooting slide in the second video, starting around 11:45.

[Susan Brown]

Hi Cooper,

See the videos and text as shown below:

#2: First video, around 2:50-3:00. Also in the text above it, “Although they all look a little different, all motors work basically the same way: by having a magnetic field in the stator (the stationary part) push against another magnetic field in the rotor (the rotating part).”

#3: Do AC induction motors (also known as asynchronous single phase motors) have brushes? (they are shown in more detail at the beginning of the second video)

#8 and 17: first video, 9:00 – 10:30

#13: second video, from about 3:30 to 4:45

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