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  1. #1
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    Thermo King V500 20 defrost issue



    I have a defrost question, i purchased a used truck box with this unit intact ( V500 20 ) i am using it as a stand alone freezer. Unit works great on electric power, however for some reason it wont go into auto defrost. I can however initiate a manual defrost. Setpoint is 20F, the evap does freeze up at least once per day. Does anyone have any ideas as to what the problem may be.



  2. #2
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    Re: Thermo King V500 20 defrost issue

    What type of in cab controller is it do you have a picture?

  3. #3
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    Re: Thermo King V500 20 defrost issue

    M13
    Thank you for your reply

  4. #4
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    Re: Thermo King V500 20 defrost issue

    Do you have a picture of the controller?

  5. #5
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    Re: Thermo King V500 20 defrost issue

    If it's the one I am thinking of try holding the select button while it's running the select button is the top middle the one that's a circle of arrows,hold it until DIT comes up release it and change the interval time with the up/down cursors then press enter which is the equals cursor

  6. #6
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    Re: Thermo King V500 20 defrost issue

    Does the cab command have three buttons (on/off, defrost and setpoint) and the setpoint control is a knob? Pretty sure that's the M13. The defrost interval on those is changed with a knob on the interface board.

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