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Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

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  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    I insulated the 2 wires (brown and blue) and power up without the overload protector just to confirm if the circuitry is working - and compressor not starting up as expected.

    Then I put everything back per normal, power up and rerun the Self Diagnostic one more time (which I have done multiple times), and paid really close attention to the indicator displays at the door panel - OMG!

    2 of the indicator lights blinked a few times then went off. I waited for a minute or so, nothing happened and all the indicator display lights were off. I have done this a few times and it always the same outcome.

    I was thinking since the outcome is nothing lighted up - so the fault should be the at the end of the flowchart:
    • Faulty compressor motor.
    • Compressor lock.

    Now, looks like it is at #4:
    • Defect of control PCB.
    • Communication error between IC1 & IC201

    So I guess I just have to source for a working controller board!
    Attached Files

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by petehall347 View Post
    so it is really 0.2 ohms which seems good

    have you tried fast freeze yet ? it should bypass the thermostat .
    You meant the Fast Freeze button on the fridge? Yes, it has no effect on the evaporator.

    I should clarify, that the fridge is always power down. Each time I did some checks, or taking measurements, I would power it up for like 5- 10 minutes, then I will power down the fridge.

    The longest I have left it power up is ~30 minutes, and still no cool air at all..

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by stj View Post
    the + end of the bridge rectifier is darker, marker pen, soot, burn mark??
    I think it's shadow from the camera phone. This pics is clearer, look normal.
    Attached Files

    Leave a comment:


  • petehall347
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by beetle1303 View Post
    Weird.. Now it reads 0.7 ohm, and touching the 2 leads together reads 0.5 ohm.
    so it is really 0.2 ohms which seems good

    have you tried fast freeze yet ? it should bypass the thermostat .
    Last edited by petehall347; 04-21-2020, 06:54 AM.

    Leave a comment:


  • stj
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    the + end of the bridge rectifier is darker, marker pen, soot, burn mark??

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Weird.. Now it reads 0.7 ohm, and touching the 2 leads together reads 0.5 ohm.

    Leave a comment:


  • petehall347
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    try putting your meter leads together then deduct the reading from 3.2 .
    have you tried fast freeze function ?

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by petehall347 View Post
    that thermal looks broken ...
    If it tested resistance of 3.2 ohms across pin 1 & 3, does it mean still good? If not, how to determine it's still functional?

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by R_J View Post
    Check the resistance between pins 1 & 3, it should check like a short. It trips with excess current not voltage.
    The resistance between pins 1 & 3 is 3.2 ohms.

    Noted your correction, important for my education, thank you.

    Presumably, if the compressor draws too high current, the temperature rises above the limit and trips open this protector, and cut off the power to all 3 terminals of the compressor?

    In my case, the voltage among all 3 terminals were 160VAC soon after powered up, does this mean the compressor is not overloaded?

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by stj View Post
    i suspect the motor may have a bad phase or drive line,
    if it hums then the electronics are trying to run it.
    we need board pics.
    Here are the controller board pics, and connectors diagram.
    Attached Files

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by Per Hansson View Post
    Could you put this original picture somewhere so I can make some tests with it?
    (Obviously you would need to use some other website if you get the error above here...)
    Here's the link for 1 such pic that caused this error: https://we.tl/t-lLIq3zXP41

    ** I just did a resized from 15mb to 4mb, then it loads OK.
    Last edited by beetle1303; 04-20-2020, 10:10 PM.

    Leave a comment:


  • R_J
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by beetle1303 View Post
    On the overload protector - how do I determine if it tripped open due to over-voltage or not?
    Check the resistance between pins 1 & 3, it should check like a short. It trips with excess current not voltage.

    Leave a comment:


  • petehall347
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by beetle1303 View Post
    Based on this sensor specs, I believe the 2 sensors I tested measuring at 1.58kOhm at ~26-28c, and 5.8kOhm at 0c should be working normally.

    On the overload protector - how do I determine if it tripped open due to over-voltage or not?
    that thermal looks broken ...

    Leave a comment:


  • RJARRRPCGP
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by Per Hansson View Post
    Could you put this original picture somewhere so I can make some tests with it?
    (Obviously you would need to use some other website if you get the error above here...)
    Was it really bigger than 128 MiB?! WTF!

    It looked like I calculated the bytes-to-megabytes correctly.

    Normally, this would look like a server-end problem.
    Last edited by RJARRRPCGP; 04-20-2020, 01:45 PM.

    Leave a comment:


  • Per Hansson
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by beetle1303 View Post
    *for some reasons, I frequently get this error when uploading pics:

    Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 27000001 bytes) in /home/badcaps/public_html/forum/includes/class_image.php on line 2390

    Any idea why this is happening?
    Could you put this original picture somewhere so I can make some tests with it?
    (Obviously you would need to use some other website if you get the error above here...)

    Leave a comment:


  • stj
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    i suspect the motor may have a bad phase or drive line,
    if it hums then the electronics are trying to run it.
    we need board pics.

    Leave a comment:


  • RJARRRPCGP
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by beetle1303 View Post
    I believe this is due to the file size too big. My phone pics are 3-4mb and I had to do a simple screen capture to reduce the size, and it works.
    For me, it looks like I can upload the original photos from my phone and they end up getting downsized automatically instead of an error. Why is that? Are mine still smaller, even when quality very high?
    Last edited by RJARRRPCGP; 04-20-2020, 09:35 AM.

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Based on this sensor specs, I believe the 2 sensors I tested measuring at 1.58kOhm at ~26-28c, and 5.8kOhm at 0c should be working normally.

    On the overload protector - how do I determine if it tripped open due to over-voltage or not?
    Attached Files

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by RJARRRPCGP View Post
    That's strange, I've had no problems uploading images during the last time I uploaded photos.

    I think it's because they are being shrunk for me...
    I believe this is due to the file size too big. My phone pics are 3-4mb and I had to do a simple screen capture to reduce the size, and it works.

    Leave a comment:


  • beetle1303
    replied
    Re: Panasonic Inverter Refrigerator model NR-BY602XS - suddenly not cold overnight

    Originally posted by budm View Post
    "When probed at the cable connector, it measure 1.58k ohm, but when power up and probed at the connector pluck back onto the controller board, it measured 0 ohm, ~2VDC.. "
    You do not perform resistance reading when the circuit is powered, you can easily damage your meter. Please read your meter user manual.
    Noted, and thank you. I am learning as I do not have prior training or experience.

    Leave a comment:

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