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  1. #1
    sgolsen7's Avatar
    sgolsen7 Guest

    Alarm code 52 on Thermo King SBIII SR+



    Hello, Could some one please help me with Alarm code 52 on Thermo King SBIII SR+.
    I searched for it but could not find it.

    Thanks



  2. #2
    Join Date
    Dec 2007
    Location
    Melbourne
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    Re: Alarm code 52 on Thermo King SBIII SR+

    http://www.vtatehnika.ee/public/file...m_Codes_EN.pdf

    alarm code list

    52 is heat circuit

    Heat Circuit
    Indicates that a problem exists with
    the heat circuit. The Heat LED and
    fuse are located on the Relay Board.
    The wiring is located in the Main
    Harness via the 26P and 26G circuit
    and the Interconnect Harness via the
    14P circuit.
    This is a check alarm.
    1. Check the refrigeration/heating performance of the unit with
    a Unit Self Check. Repair refrigeration system as required.
    2. Using Service Test Mode as shown in Service Procedure
    A34A, check unit performance in heat modes. Repair
    refrigeration system as required.
    3. Check fuses F6 and F35 on the relay board.
    4. Check the Return Air and Discharge Air sensors for proper
    calibration.
    5. Check pin 9 on the 37 pin Amp connector at the
    microprocessor for a pushed pin.
    6. Check the harness wire 14P with an ohmmeter for
    continuity per Service Procedure H04A.
    7. Check the 26P and 26G wires with an ohmmeter per
    Service Procedure H04A.

  3. #3
    sgolsen7's Avatar
    sgolsen7 Guest

    Re: Alarm code 52 on Thermo King SBIII SR+

    Will do. Thank you very much.
    sgolsen7

  4. #4
    Join Date
    May 2011
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    Re: Alarm code 52 on Thermo King SBIII SR+

    hi guys.i have an sltci with alarm -36.even in the Sguarded access it doesnt come off.
    you think its the micro?

  5. #5
    Join Date
    Nov 2010
    Location
    The Netherlands
    Age
    64
    Posts
    134
    Rep Power
    14

    Re: Alarm code 52 on Thermo King SBIII SR+

    Electric motor failed to run. No standby power or a phase down. Try checking the voltage at the phase detector (battery voltage on cables ER and 8) Check the motor contactor. You could also try testing the alternator. This code is usually tripped by the alternator frequency being less than 200Hz for 10 seconds

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