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Thread: TRANE CVHF - COMM LOSS STARTER MAIN PROCESSOR ALARM

  1. #1
    Join Date
    Mar 2021
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    TRANE CVHF - COMM LOSS STARTER MAIN PROCESSOR ALARM

    Hi,

    We have encountered persisting alarm of Trane CVHF which is comm loss starter alarm. It is still existing even after we have reset it and inspect all the sensors. We have also check the reading in the power supply module and continuity in the communication cable(data) from starter module. Our readings gives us good readings in the parameters.
    I would like to ask any recommendations on how to remove the alarm.

    Thank you and Regards

  2. #2
    Join Date
    Nov 2006
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    Diagnostic: LLID Communication Loss

    Source: LLID

    Active Period: Always.

    Description of Trigger Behavior: Continual loss of communication between the MP and the LLID has occurred for a 35-40 second period.

    Troubleshooting Guide:

    A LLID may not be communicating for the following reasons.

    It is not installed yet. A configuration change may require the presence of a new LLID.
    It has been disconnected from the bus. The bus may have been physically cut or just disconnected in the panel.
    Another LLID is interfering with this LLID.
    A LLID has failed or is behaving badly.
    Binding View should be used to troubleshoot the LLIDs network. In Binding View all LLIDs will be listed along with their current status. A red face indicates that the LLID is not communicating.

    If some LLIDs are not communicating, check the following:

    If many LLIDs are missing, go to the LLID network troubleshooting document.
    Verify LLID exists and is wired to the bus. If a new LLID needs to be added go to the add new LLID procedure.
    Bind all LLIDs that are not communicating.
    Select the LLID in Binding View and press the bind button.
    A dialog will pop up asking you to select the device. Select the desired LLID using a magnet. If the service select LED does not turn on, the LLID is not powered. This indicates the bus is severed.
    Press the OK button on the dialog. The device should bind successfully and turn green in Binding View. If the wrong type of LLID was selected an error message will appear.
    If the LLID fails to bind replace it.

  3. #3
    Join Date
    Nov 2018
    Posts
    12
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    What type of starter do you have??

  4. #4
    Join Date
    Jul 2007
    Location
    The Hot South
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