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Thread: Help ry100fj7v1
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26-01-2013, 12:52 AM #1
Help ry100fj7v1
Wondering if anyone can help me as I'm having a nightmare with this system! Daikin RY100FJ7V1 ducted on R22! Found system to be short of gas, found leak and re commissioned. Then would only get 30 degrees on the coil (41 settings) re claimed system and changed expansion valve and head and re charged! The system is still doing the exact same thing. Boss is going wild and I'm back up on the snowy roof trying to fix it again Monday! Any ideas would be handy I'm thinking Outdoor PCB. System has no faults logged. Cheers
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26-01-2013, 10:53 AM #2
Re: Help ry100fj7v1
Short of charge? (have you measured the pipework and recalculated the total charge)
Lack of airflow across/around the outdoor unit? (Is the coil clean, the fan running flat out and nothing behind or in-front of the unit)
Is the compressor pumping properly? (This is an old lady at the end of her game, a pumpdown test will give you an indication of her efficiency)
After the above has been checked (Oh, I do assume you took a deep vacuum on her and used OFN whilst you were brazing) you need to start looking at pressure/temperature relations.
It is unlikely that it will be an electrical/control issue, they tend to either stop the unit completely or not be present...
.
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26-01-2013, 11:32 AM #3
Re: Help ry100fj7v1
Thanks for the reply! I have done everything you said apart from the compressor pump down test and was actually thinking about this when I was driving home! If the unit was a German Sheppard you would take it to the bets to be put down but the client wants to try get it running!
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26-01-2013, 04:36 PM #4
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26-01-2013, 04:54 PM #5
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26-01-2013, 07:41 PM #6
Re: Help ry100fj7v1
You need to post some temperature and pressure readings so that a proper diagnosis can be made instead of guessing whats wrong
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26-01-2013, 07:57 PM #7
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26-01-2013, 09:04 PM #8
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26-01-2013, 09:59 PM #9
Re: Help ry100fj7v1
So you have 30 degrees C coil temp but also 30 degrees C air off the indoor unit?
As Frank says more pressure/temps are required to help with the diagnosis.
Suggest
Discharge pressure or liquid pressure (SCT)
Discharge temperature after the compressor
Liquid temperature
Suction temperature
Suction pressure (SST)
Air on/off indoor
Air on/off outdoor
You need to see if the discharge temperature from the compressor is much higher than your indoor coil temp, if it is then start with looking at the 4 way reversing valve.
If its not then start looking at low superheat flooding the compressor which will affect the discharge temperatures.
Again without knowing the temps & pressures its just guessingThe difference between genius and stupidity is that genius has its limits.
Marc
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27-01-2013, 12:38 AM #10
Re: Help ry100fj7v1
And...
Accurate figures is needed.
Your 3 Bar, sure it wasn't 2.95 or 3.07???
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27-01-2013, 10:55 AM #11
Re: Help ry100fj7v1
http://www.mediafire.com/view/?epjaejoexnr50dp http://www.mediafire.com/view/?6r7q2k2nebsrukf http://www.mediafire.com/view/?g0ode3h8rvhhzx1 bit of literature into the operation of units-any red led 1,2 flashing or on on the outdoor??- measure piperun,check strainers aren't clogging