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  1. Replies
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    You would want to do this. Turn off all your...

    You would want to do this. Turn off all your compressors on the rack system. Then valve off all your suction ball valves on every circuit, except for the one you are wanting to pump down. Then...
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    5,435

    agree with superfittertech, would try the...

    agree with superfittertech, would try the economizer module, UEM board, try unplugging the main plug on the board, and then start the unit cooling in test mode. after bypassing safeties and then...
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    2,523

    i would check the condenser fan motor capacitors,...

    i would check the condenser fan motor capacitors, make sure they aren't cutting off due to bad capacitors. if the unit has a UEM board, unitary economizer module, make sure it has no problems in it....
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    43
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    7,862

    For the voyager 301, the TXV kit will be two of...

    For the voyager 301, the TXV kit will be two of them, for both circuits. Cut the feeders right after the orifice's with dykes or pliers. Then round the pipes out, feed all your cap tubes (1/4"...
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    2,558

    Does the unit have the UEM board, I believe that...

    Does the unit have the UEM board, I believe that is the Unitary Economizer Module. Sometimes they short or ground the 24 circuit. Try unplugging it at that board. It's located under the...
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    4,087

    Go around the the board, Wire your controls from...

    Go around the the board, Wire your controls from the stat through your safeties and pressure switches. All that board is a type of input/output.
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    2,928

    sounds like the orifice is stopped up, check...

    sounds like the orifice is stopped up, check subcooling. 100f return air would make that suction pressure higher. if you changed the driers, then its the metering device in that unit. Trane...
  8. Replies
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    1,175

    Trane C.U. RAUA-2CC4

    what is the controller for the cylinder unloading solenoid valves on this condensing unit? It is reading low pressure right off the suction service valve, the unloader solenoids are tied to this...
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