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Thread: 30GTN chiller

  1. #1
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    Question 30GTN chiller


    30 gtn chiller showing fault code T051.
    working pressures are found ok.
    LP switch replaced,compressor suction gas sensor OK
    throughout the day system working normally.
    It found tripping on night or early morning time.

    RGDS
    Last edited by vinod; 10-04-2008 at 09:03 AM.



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    Re: 30GTN chiller

    What you need to know? Meaning of that code or what is wrong with chiller?
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  3. #3
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    Re: 30GTN chiller

    T051 is usually the HP switch is open. I will send you on the manual. If it is a water cooled chiller, I would be checking the sequence of the condenser pumps as the unit is tripping out at night or first thing in the morning

    Ps. PM me with your email address

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    Re: 30GTN chiller

    30GTN means its aircoold chiller, If I assume this chiller is 2 to 3 years old there was a control relay problem, to try change the compressor A1 relay with A2 and wait for alarm, check the cond. fan compartment division sheets they are there? or missing. just check these two and come back.

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    Re: 30GTN chiller

    Quote Originally Posted by professional View Post
    30GTN means its aircoold chiller, If I assume this chiller is 2 to 3 years old there was a control relay problem, to try change the compressor A1 relay with A2 and wait for alarm, check the cond. fan compartment division sheets they are there? or missing. just check these two and come back.
    Thanks, we changed the control relay and it found working oK. still one doubt left that how it works before the day time without any failure?

  6. #6
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    Re: 30GTN chiller

    Condenser control due low ambients causing a problem perhaps ?
    Brian - Torquay, Devon, UK
    I have to stop saying "how stupid can you be?" to my co-workers.
    They're starting to take it as a challenge...

    BASIC MAINTENANCE. If it doesn't move and it should then use WD40. If it moves but it shouldn't then use Duct Tape.

  7. #7
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    Re: 30GTN chiller

    What suction and discharge pressures are you getting during the day?

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    Re: 30GTN chiller

    T051=High-pressure or loss-of charge switch open, faulty control relay or CPCS board, loss of condenser air, liquid valve closed.

    Compressor Protection Control System (CPCS)
    or Control Relay (CR) 30GTN,R and 30GUN,R
    040-110 Each compressor has its own CPCS module or
    CR which is standard on sizes 080-110 and optional on sizes
    040-070. See Fig. 13 for CPCS module. The CPCS or CR is
    used to control and protect the compressors and crankcase
    heaters. The CPCS and CR provide the following functions:
    compressor contactor control
    crankcase heater control
    compressor ground current protection (CPCS only)
    status communication to processor board
    high-pressure protection
    loss-of-charge protection
    One large relay is located on the CPCS board. This relay
    controls the crankcase heater and compressor contactor, and
    also provides a set of signal contacts that the microprocessor
    monitors to determine the operating status of the compressor. If
    the processor board determines that the compressor is not operating
    properly through the signal contacts, it will lock the compressor
    off by deenergizing the proper 24-v control relay on the
    relay board. The CPCS board contains logic that can detect if
    the current-to-ground of any compressor winding exceeds
    2.5 amps. If this condition occurs, the CPCS shuts down the
    compressor.
    A high-pressure switch is wired in series between the MBB
    and the CR or CPCS. On compressor A1 and B1 a loss-ofcharge
    switch is also wired in series with the high-pressure
    switch. If the high-pressure switch opens during operation of a
    compressor, the compressor will be stopped, the failure will be
    detected through the signal contacts, and the compressor will
    be locked off. If the lead compressor in either circuit is shut
    down by the high-pressure switch, loss-of-charge switch,
    ground current protector, or oil safety switch, all compressors
    in that circuit are shut down.
    NOTE: The CR operates the same as the CPCS, except the
    ground current circuit protection is not provided.
    Check your flow rate (air ,water) and operational limits (temperature, voltage drop and imbalance).
    Last edited by nike123; 28-04-2008 at 12:44 PM.
    Now, when I am officialy citizen off EU, I am looking for decent job! For any job offer please check my profile!

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    Re: 30GTN chiller

    Replaces the switch of high pressure, i had that problem working the compressor and 5minutos and parrot, install manometros and verify the pressure determine failure download

  10. #10
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    30GTN chiller

    how much do you have to top off with the chiller running?

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