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  1. #1
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    LG LG B48AWYN762 fault code


    Anyone got a manual or fault codes for an LG LG B48AWYN762?
    Got one to look at tommorow, LG have given me authority to repair as the customer can't get anyone out to look at it under warranty.
    I have looked at heaps of older LGs in the past out of warranty, but not any new ones, so my info is old. EG they say CH12 fault, and none of my older stuff has that fault code.



  2. #2
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    Re: LG LG B48AWYN762 fault code

    foun
    Error Indicator:




    The function provides self-diagnosis and displays an error code if there is any trouble.




    Error codes are displayed on the Indoor unit’s Wired Remote as CH**, and/or Fascia Display. In


    addition, the code is indicated via LED’s on the outdoor unit control board.




    If more than two troubles occur simultaneously, the lower number of error code is displayed first.




    After an error occurs, if error is released, error LED is also released simultaneously.


    Indoor Unit Faults:


    Error


    code


    Contents Case of error


    Indoor


    Status


    01 Air sensor (open/short) Open / Short circuit Off


    02 Inlet pipe sensor Open / Short circuit Off


    03


    Communication(Indoor

     Wired


    R/Control)


    Communication Poorly Off


    04 Drain pump / Float switch


    Float switch Open circuit (High level water


    alarm)


    Off


    05 Communication(Indoor

     Outdoor) Communication Poorly Off


    06 Outlet pipe sensor Open / Short circuit Off


    07 Different operation mode Indoor units set in different operation modes Off


    HL High Limit (Float Switch) Same as code 04, Float switch Open circuit Off


    CL Child Lock Function selected


    Not an error, press Timer & Min buttons


    simultaneously for 3 seconds to toggle On/Off


    On


    Po Jet Cool Mode selected


    Not an error, press Jet Cool button to toggle


    On/Off


    On


    LG Air Conditioning Universal & Multi Split Fault Codes Sheet


    Hendra/Macedo - April 2007


    - 2 -


    Outdoor Unit Faults can also be read from the outdoor unit PCB using the flashing LED’s as below:


    Error


    code


    Contents


    LED01G


    (Red)


    LED02G


    (Green)


    Case of Error


    Outdoor


    Status


    21


    IPM Fault (Compressor Over


    current)


    2 times 1 time


    Compressor malfunction, IPM


    Fault


    Off


    22 CT 2 (Max. Current) 2 times 2 times Current is 14A

     Off


    23 DC Link Low Volt. 2 times 3 times DC Link volt. Is 140V

    Off


    24 Low / High Pressure 2 times 4 times


    Low / High press switch


    OPEN


    Off


    25 AC Low / AC High Volts. 2 times 5 times Abnormal AC volt. Input. Off


    26 DC Compressor Position 2 times 6 times Off


    27 PSC Fault (Reactor) 2 times 7 times Off


    28 DC Link High Volts 2 times 8 times Off Off


    32 Discharge Pipe Temp. High (INV) 3 times 2 times Off Off


    33


    Discharge Pipe Temp. High


    (Cons.)


    3 times 3 times Off Off


    40 CT Circuit 4 times CT Circuit malfunction Off


    41 D-Pipe sensor INV. (Open/Short) 4 times 1 time Open / Short circuit. Off


    44 Air sensor (Open/Short) 4 times 4 times Open / Short circuit Off


    45 Cond. Pipe Sensor (Open/Short) 4 times 5 times Open / Short circuit Off


    46


    Suction Pipe Sensor


    (Open/Short)


    4 times 6 times Open / Short circuit Off


    47


    D-pipe Sensor Cons.


    (Open/Short)


    4 times 7 times Open / Short circuit Off


    48 D-Pipe & Air Sensor (Open) 4 times 8 times Dual Sensor unplugged Off


    51 Over Capacity 5 times 1 times Over Load Combination Off


    52


    Communication Error (Main


    micom

     Sub micom)


    5 times 2 times Poor/Loss of Communication Off


    53


    Communication Error (Indoor

    


    Outdoor)


    5 times 3 times Poor/Loss of Communication Off


    54


    Outdoor 3-Phase Power Supply


    Reverse Phase / Missing Phase


    5 times 4 times Incorrect Wiring Off


    60 EEPROM Check Sum 6 times Check Sum Mis-Match Off


    61 Cond. Pipe Sensor Temp. High 6 times 1 time Cond. Temp. High Off


    62 Heat Sink Sensor Temp. High 6 times 2 times Heat Sink Temp. High Off


    63 Cond. Pipe Sensor Temp. Low 6 times 3 times Cond. Temp. Low Off


    65 Heat Sink Sensor (Open/Short) 6 times 5 times Open / Short circuit Off


    67 Outdoor BLDC Fan Lock 6 times 7 times Fan Motor/Circuit Problem Off


    105


    Comms. Error (Main board

    Fan


    board)


    6 times 5 times Poor/Loss of Communication Off
    d some

  3. #3
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    Re: LG LG B48AWYN762 fault code

    Thanks IM, I've got all the old stuff like that page you tried to copy/paste. Just nothing on the new units/controller, or anything with CH12.

  4. #4
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    Re: LG LG B48AWYN762 fault code

    Hi Paul, I have a whole range of data on the new stuff, (none on the older).

    CH12 Error Code: "EEPROM Sum Check Error - Outdoor unit PCB EEPROM failure, try removing EEPROM and refitting if removable (possible contact fault), otherwise replace the PCB if the EEPROM is non removable.

    Edit: Paul can you clear some of your private messages, your inbox is full and I have some further info for you.
    Last edited by exotiic; 14-02-2011 at 09:39 AM.

  5. #5
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    Re: LG LG B48AWYN762 fault code

    Done, and thanks.

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