Results 1 to 4 of 4

Thread: Carel PCOB

  1. #1
    tes.tech's Avatar
    tes.tech Guest

    Unhappy Carel PCOB



    Has any body experienced random alarms with Carel PCOB 000 A21 ?
    The board is in a Thermocold Water Chiller , 2003 , Twin compressor, water cooled condensor.
    The fault = High Pressure Circuit 1, but it only shows after the compressor 1 has cycled off on set point.
    I have checked all the interlocks, I suspected the thermistor as this is in the line but its ok.
    The I/O doesnt show a fault at any time, I spoke with Carel Technical Support who suggested problem with the memory chip, and resetting all parameters ( can do in manufacture section)
    would solve the issue.
    Has any body tried this successfully ?
    I have to travel along way to re visit machine and would feel better if I thought it may work.
    I am currently quoting customer to upgrade controller but would be shame if a simple reset did the trick.



  2. #2
    Join Date
    Feb 2013
    Location
    UK
    Posts
    10
    Rep Power
    0

    Re: Carel PCOB

    Hi
    HP1 is just a digital input, problem is either the HP switch or probably a relay inside your electric panel , all digital input on PCOB are 24Vac, you should have relay between your HP switch and PCOB, check that one first.

    Regards,
    Behzad

  3. #3
    Join Date
    Apr 2009
    Location
    israel
    Age
    50
    Posts
    778
    Rep Power
    18

    Re: Carel PCOB

    Hi
    check wiring, it would seem if this only happens when cycling off.
    then some contact is wrong or loose.
    good luck
    THE DEFINITION OF A SMART PERSON IS ONE WHOM LEARNS FROM HIS MISTAKES!!!

  4. #4
    Join Date
    Aug 2011
    Location
    Ukraine
    Posts
    6
    Rep Power
    0

    Re: Carel PCOB

    I have the same problem. AL013 High Pressure Circuit 2(Thermocold AWA ANERSAVE II 2310 ZC SE B; R407; PCO1 Carel controller). The wiring is OK. Pressure relays: Johnson controls P100CP-1 CO 300Psi(20 Bar) CI 400(27 Bar) with automatic reset. The pressure in the system 2 is 7.5 Bar but relay is closed(it should be closed if the pressure rise 27 bar). Thus the problem is in pressure relay maybe

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •