Temperature sensor in refrigeration unit of HydroStar with CAN Technotrans (CD 74)

Discussion in 'Heidelberg Printing Presses' started by f_club, Feb 27, 2017.

  1. f_club

    f_club New Member

    Joined:
    Feb 2017
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    Location:
    Bangladesh
    Dear altruists,

    The temperature sensor in refrigeration unit (dampening unit) of HydroStar with CAN Technotrans (CD 74) is showing higher temperature than actual. Example: when actual dampening solution is 7C, it is showing a temp of 22C which is unusual and therefore compressor is shutting down.
    Is there any calibration process for this sensor, or do I have to replace it?
     
  2. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    2,852
    Location:
    Managua,Nicaragua
    Hi sir
    Please check the input voltage to the unit:1) see if there are too high 2) too low
    3)check C. Breakers in the unit 4)check electrical circuit 5)check the pilot LED ON the Tre 31 circuit board
    4)execute maintenance Filter dirty 5) condenser unit dirty ,clena or motor condenserventiler defecty test and try to clean.
    there are other reason. however make this first.
    Use DMM+Schematic +wiring diagram for to troubleshooting
    back to me any question or doubt
     
  3. f_club

    f_club New Member

    Joined:
    Feb 2017
    Messages:
    2
    Location:
    Bangladesh
    Dear Sir,
    Thank you very much for your quickest response. Yes, I checked all the points mentioned. The voltage was higher. Is there any way of calibrating those sensors?

    Thanks again.
     

  4. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    2,852
    Location:
    Managua,Nicaragua
    Dear Sir:
    1) test the voltage issue again the plate name of the voltage of machine, and see if there are in
    Tolerance abouut+-10% if they are you must call the electrical company. or see if you have some
    problem with you main panel.
    The compressor can be faulty if the voltage is higher out of normal or Fan.
    2) There are calibration for sensor for PH, and conductivity , in the control consol
    3) However you will need s. manual for to do many test with the LEDS, attached in the same.
    4) You need your schematic diagrams. for to be sure if are o.k all Measuring with DMM.
    5) Finall you need make some Preventive Maintenance in his unit like some A/C or refrigerator.
     
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