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jure
21-04-2008, 09:59 PM
Hi guys
I have a problem with one small water chiller wich runs on R410C
During running the side glass goes from full to empty, so the TXV is hunting and low pressure fluctuates. But when I tried to fill in some adittional refrigerant I had problems with High pressure alarm.
Help me if you can

Thanks
nike123
21-04-2008, 10:03 PM
Hi, Jure! Welcome to RE.
How is positioned sensing bulb of TXV? Does near sensing bulb you have heat source?
Is it R407C or R410A?
dear.mr.davidov
22-04-2008, 07:34 AM
hi
what is water delta P and delta T
what is S.C and S.H
jure
22-04-2008, 09:01 AM
Sorry for my mistake, it is R410A, we dont have any heat sources near TXV bulb and it is imposible to mesure SSH or anything else because the conditions are always changhing due to constant opening and closing TXV valve.
powell
22-04-2008, 02:50 PM
Sorry for my mistake, it is R410A,

You didn't make a mistake, nike just spilled his beer and missed it.:D

I suspect the external equalizer line is restricted.

Check out this link on troubleshooting.

Section: Suction Pressure Fluctuating.

http://www.hvacrinfo.com/system_trouble.htm
Dimitris
22-04-2008, 05:02 PM
check how the condenser fans are working. Are they working continuously or cycling on and off?
nike123
22-04-2008, 11:25 PM
You didn't make a mistake, nike just spilled his beer and missed it.:D



I protest, I did not spilled nothing.;):D:D
US Iceman
23-04-2008, 02:06 AM
Has the TXV been changed at anytime during the recent past?
Kh1971
23-04-2008, 11:17 AM
Hi,

I thing you should check every thing from 0 point
jure
23-04-2008, 08:35 PM
Powell thanks for the the tip and link
I managed to solve the problem, the problem was in the equalizer line it was like u said restricted, so a big thanks to you
powell
23-04-2008, 10:17 PM
Powell thanks for the the tip and link
I managed to solve the problem, the problem was in the equalizer line it was like u said restricted, so a big thanks to you
Good job jure! Thanks for the follow up.
WINJA
24-04-2008, 09:25 AM
Check that the drier is not blocked , and make sure the head preasure control works ok if fitted , with a lot 404a units you can keep adding gas and it will still show short if the head preasure is to low , around 40 deg c condensing is a good target
moideen
04-05-2008, 09:57 PM
Hi guys
I have a problem with one small water chiller wich runs on R410C
During running the side glass goes from full to empty, so the TXV is hunting and low pressure fluctuates. But when I tried to fill in some adittional refrigerant I had problems with High pressure alarm.
Help me if you can

Thanks


Good job jure! Thanks for the follow up.
THANK POWEL.YOUR ANSWER GAVE ME A GOOD SENSE.