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  1. Upload a history log for us to look at ?

    Upload a history log for us to look at ?
  2. Replies
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    This may help a little 814874 Regards

    This may help a little

    814874

    Regards
  3. Replies
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    672

    How frequently is the problem happening? Do it...

    How frequently is the problem happening? Do it occur at the same time every day ? Is there a trend to it? Can you run the chiller in Local Mode with the BMS dis-connected ? Then see if it trips, you...
  4. Thread: York YR

    by raptyr
    Replies
    9
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    351

    It could be the coalescers in the Oil...

    It could be the coalescers in the Oil sump/separator, you should check at any place you can along the compressor discharge , separator inlet, separator outlet, condenser inlet, if there are any...
  5. Thread: York YR

    by raptyr
    Replies
    9
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    351

    I just checked a log i had from a few years ago...

    I just checked a log i had from a few years ago of one running full load , size of chiller is not really relevant but here is the log814593
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    Well it looks like a remote interlock is stopping...

    Well it looks like a remote interlock is stopping the chiller then re-starting it, what remote interlocks have you got wired in ?
  7. Thread: York YR

    by raptyr
    Replies
    9
    Views
    351

    I would expect the discharge and oil pressure to...

    I would expect the discharge and oil pressure to be pretty close, within 1-2 psig of each other but your condenser pressure is way down, you have some sort of restriction in gas feed to the condenser...
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    Pump wiring Star or Delta on both pumps ? ...

    Pump wiring Star or Delta on both pumps ?


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  9. So do you have soft stop enabled ? Sent...

    So do you have soft stop enabled ?


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  10. Moideen, what are the run hours on your...

    Moideen, what are the run hours on your compressors ? 10 years doesn't seem too bad but what parts and why were they overhauled ?
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    I use a combination of Fluke 289's, Fluke 435 II,...

    I use a combination of Fluke 289's, Fluke 435 II, Fluke 190-204 4 channel scopes and an 8 channel Picoscope, it covers everything i can think of on both input and output side and can be used safely...
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    Why do people still have millennium panels ? I...

    Why do people still have millennium panels ? I hope all working ok now


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    637

    Is the Optiview configured for SSS type starter ,...

    Is the Optiview configured for SSS type starter , are comms established between Optiview and SSS trigger board ? Is overload setting correct in Optiview motor display ? Do you see any data in SSS on...
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    It could be your economizer solenoid valve is...

    It could be your economizer solenoid valve is stuck open or energised , it should become active above 120 he and shut off below 90 hz . You should also see about 6-10 F subcoolling at condenser...
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    Does it have a VSD or is it SSS or remote starter...

    Does it have a VSD or is it SSS or remote starter and does it have an Optiview panel?
    Are both chilled and condenser water flows stable and is condenser/evaporator water inlet temps stable ? ...
  16. Thread: No cool load

    by raptyr
    Replies
    12
    Views
    1,186

    I would see it happen occasionally on YKs and I...

    I would see it happen occasionally on YKs and I never got to the bottom of it , I would reboot and everything was fine for a few more months, updated software too but never knew if that really fixed...
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    1,036

    It does Sent from my iPhone using Tapatalk

    It does


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  18. Thread: No cool load

    by raptyr
    Replies
    12
    Views
    1,186

    Auto lead lag or manual ? Sent from my...

    Auto lead lag or manual ?


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  19. Thread: No cool load

    by raptyr
    Replies
    12
    Views
    1,186

    Was it on local control or remote ? Sent...

    Was it on local control or remote ?


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  20. Replies
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    Check the Sales Order screen on the Optiview for...

    Check the Sales Order screen on the Optiview for the Design FLA and then confirm that is what the Optiview is also set for on the VSD screen and then verify independantly with your own meter that...
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    Confirm if the Feed Valve operates cleanly from...

    Confirm if the Feed Valve operates cleanly from full closed to full open, check the plugs on the Danfoss controller at the back of the VSD panel and closely inspect how the wires are inserted into...
  22. Thread: York yk

    by raptyr
    Replies
    13
    Views
    1,196

    Good news, I would keep an eye of the oil pump...

    Good news, I would keep an eye of the oil pump frequency and get an oil sample analysed anyway, you may have to do an oil and filter change anyway, now you have time to check the oil and prepare in...
  23. Thread: York yk

    by raptyr
    Replies
    13
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    1,196

    Well what is it full of would be the first...

    Well what is it full of would be the first question? Wax, lumps of aluminium, metal debris, grey paste ? How old is this YK?


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    run a separate hardwire directly from the output...

    run a separate hardwire directly from the output board to the VSD logic board , if it works then it's harwired fault , if not then check the RX/TX led's on the motherboard to logic board, if comms is...
  25. 1k is a 1000 Sent from my iPhone using...

    1k is a 1000


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  26. I suspect he is joking :-)

    I suspect he is joking :-)
  27. Replies
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    The main reason Poodle is the equipment used to...

    The main reason Poodle is the equipment used to do the machining of the rotors, tighter tolerances = quieter machine but can also cost $$$$$$ extra, and if you have just spent several millions on...
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    cost and efficiency are improved without the...

    cost and efficiency are improved without the check valve but reliability isn't , effect on efficiency in not much in my opinion , 1% but that can be a lot if you are a marketing or sales person...
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    The initial minimum speed was 50hz and although...

    The initial minimum speed was 50hz and although thereafter the compressor does ramp down to 0hz in an electronically soft stop way, but this is not really a mechanical or refrigerant related soft...
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    They did not fit based on cost and effect on...

    They did not fit based on cost and effect on efficiency but that’s about 0.5% and it’s no good having an efficient broken compressor due to debris from the oil separator


    Sent from my iPhone...
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    The problem for the compressor with backspin is...

    The problem for the compressor with backspin is that it can wash metallic and copper debris from the oil separator back into the rotors and lock up the compressor, you can fit a standard Danfoss...
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    Check your condenser water temperatures ...

    Check your condenser water temperatures


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  33. Replies
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    Hope this helps Regards808381 808382

    Hope this helps
    Regards808381
    808382
  34. Replies
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    9,694

    If this shaft is moving in both directions then...

    If this shaft is moving in both directions then you know the slide valve is moving in both a load and unload direction, but why would the amps increase and current limit or trip if you are unloading?...
  35. I would open up all valves before powering up, do...

    I would open up all valves before powering up, do you have a suction actuator valve too ? Make sure it opens because they can stick if stored or standing for a long time, you may have to remove the...
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    Can you explain why the reverse rotation when...

    Can you explain why the reverse rotation when slowing down is not good for the compressor ?
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    Is the FLA increasing due to increased head...

    Is the FLA increasing due to increased head pressure or due to slide movement, you can see if the slide is moving by watching the control shaft connected to the pot


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    You can purchase a suction check valve from Frick...

    You can purchase a suction check valve from Frick that fits those compressors or you can fit a standard Danfoss NRV in the discharge line between the oil separator outlet and condenser inlet , that...
  39. You only need power on for about an hour before...

    You only need power on for about an hour before running, the heater in the compressor just warms the body directly to keep and liquid refrigerant out , there is no oil heater



    Sent from my...
  40. Replace the aluminium hx with a copper tube and...

    Replace the aluminium hx with a copper tube and fin type it is the reaction with the aluminium that causes the problem


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  41. Replies
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    The YR chillers are notorious for oil loss,...

    The YR chillers are notorious for oil loss, especially if you are running low condensing temperatures, if the Chilled Water Leaving setpoint is 7C then i would ensure you are running at least 22C...
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    Switch the chiller off and the fault will go away...

    Switch the chiller off and the fault will go away


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  43. Thread: YMC2-S1055AAS

    by raptyr
    Replies
    4
    Views
    526

    Are any of the main fuses blown ? Normally with...

    Are any of the main fuses blown ? Normally with Input DCCT's faults we swap around the plugs on the DCCT's to see if the fault moves with the plug or stays with the DCCT, usually that indicates that...
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    You should replace the harnesses too between the...

    You should replace the harnesses too between the gate driver board and the VSD Logic Board, especially if the fault is intermittant
  45. Replies
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    3,103

    Did you replace the harness at the same time as...

    Did you replace the harness at the same time as you replaced the board ?


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    I think you may find with vets that due to the...

    I think you may find with vets that due to the lack of internet and mobile phones they had to try and figure it out for themselves or RTFM or , god forbid humiliate themselves by asking their manager...
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    1,995

    Well there are “demand “ limits , they are...

    Well there are “demand “ limits , they are typically set just above the optimum sweet spot for your specific site selection , that’s when you want another chiller to kick in and balance load across 2...
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    Then there is “Pull Down “ limit too [emoji4] ...

    Then there is “Pull Down “ limit too [emoji4]


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  49. Thread: YVWA Inhibitor

    by raptyr
    Replies
    9
    Views
    1,018

    It's light blue now, changed again :-)

    It's light blue now, changed again :-)
  50. Or as we call it 'small temperature difference' I...

    Or as we call it 'small temperature difference' I really don't know which boffin came up with that when we all use 'Approach' LOL
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