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  1. 09-21-2011, 01:03 PM #1
    Tommy1010
    Tommy1010 is offline Professional Member
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    Before I continue..Carrier issue

    Carrier WSHP...460v 3 ph
    Model # 50RVC036LCC60130
    Serial# 3907V39197

    Issue - Upon a call for cooling, compressor comes on. About 10 - 20 secs later it cuts off.

    LED flash code was slow blink "Fault Retry"
    After 3 tries, it goes into fast flash..LOCKOUT

    Water flow and temp was good.

    I verified voltage, supply and control..OK

    Pressures were 70/250..all corresponding to indoor temp and water temps.

    I jumped out every safety in the unit one by one...same result.

    I narrowed it down to the CXM board must be bad.

    I have a new one installing it now.

    But before i bring it all the way back to the pulpit and install it again, I would like to verify and test the unit.

    Is there anything else I should look into before I go with the CXM board being the reason?
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  2. 09-21-2011, 01:26 PM #2
    wbrown
    wbrown is offline Regular Guest
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    After you got the fast flash lockout, what code did the CXM board flash ? You will have to momentarily short the test pins on the CXM board to get this code.
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  3. 09-22-2011, 08:09 PM #3
    Dallas Duster
    Dallas Duster is offline Professional Member*
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    Do you happen to have another unit onsite that uses the same board that you could swap it out with to check to see if the fault follows?
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.
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  4. 09-22-2011, 08:15 PM #4
    chillerout1
    chillerout1 is offline Professional Member*
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    I told him how to get fault code in his other thread on this subject. those units will also flash for the performance sentinal feature on those units which should be disabled in your situation
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  5. 09-23-2011, 12:33 AM #5
    Dallas Duster
    Dallas Duster is offline Professional Member*
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    Quote Originally Posted by Tommy1010 View Post
    Carrier WSHP...460v 3 ph
    Model # 50RVC036LCC60130
    Serial# 3907V39197

    Issue - Upon a call for cooling, compressor comes on. About 10 - 20 secs later it cuts off.

    LED flash code was slow blink "Fault Retry"
    After 3 tries, it goes into fast flash..LOCKOUT

    Water flow and temp was good.

    I verified voltage, supply and control..OK

    Pressures were 70/250..all corresponding to indoor temp and water temps.

    I jumped out every safety in the unit one by one...same result.

    I narrowed it down to the CXM board must be bad.

    I have a new one installing it now.

    But before i bring it all the way back to the pulpit and install it again, I would like to verify and test the unit.

    Is there anything else I should look into before I go with the CXM board being the reason?
    Is it still going off on that under/over voltage alarm? If so there is a way to disable that alarm but that is a last resort. Which it sounds like this is where you are at.
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.
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  6. 09-23-2011, 10:44 PM #6
    chillerout1
    chillerout1 is offline Professional Member*
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    could be a bad sensor or sensors are reversed
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  7. 09-28-2011, 03:57 PM #7
    wbrown
    wbrown is offline Regular Guest
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    Well ??
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  8. 09-28-2011, 06:09 PM #8
    Hardwater
    Hardwater is offline Regular Guest
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    Did you find the reason it is locking out? you might want to determine what caused the board to go bad. The possibilty exist that when you replace the board it might cook the new board.

    What was the fault code? I didn't notice it unless I over looked it. Some of these boards can get a little expensive.
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