Air cooled? Water cooled? Not recognizing that model number what part of the world are you near?
I have a Carrier Screw Compressor (ECC360-336LRCP) The chiller is about 5 years old. I have this problem from day one-- when the unit starts it will go off on a alarm A030 (Compressor A1 Pre-Start Oil Pressure) This will go on for a few times and go away for 2 or 3 weeks, The oil pump has been replaced , oil solenoid has been replaced, the check valve has been changed, oil transducer has been changed-- when I vent a small amount of oil from the ascess valve by the oil inlet to comperssor after falure, the oil comes out like it has liquid refergerant in it-- The unit does not have oil heaters on it-- after I do a vent the unit will start a run like a champ-- should the oil solid, no foam-- The Carrier tech is lost--no help!!! Has any one had a problem like this??
Air cooled? Water cooled? Not recognizing that model number what part of the world are you near?
I feel your pain. i have a pair of 30hxc machines doing the exact same things.
i have swapped parts,replaced parts, sat on a 5 gallon bucket for hours with laptop hooked-up monitoring everything and still have not figured it out. Mainly on circuit "b".
Tech support gave up on me. My last option is to temporary install an ivue and trend all pressures. good luck.
I don't recognize the number for mandangle either. On the 30hxc to develope oil pressure you have to develope discharge pressure. The discharge pressure pushes the oil. If your condenser water is to cold, and your discharge pressure is slow developing, you will have a low oil pressure trip. You might already know all this, but I thought I would throw it out there just in case.
true knowledge exists in knowing that you know nothing.
I have good oil psi after it starts,when it starts. It will not build pressure at start up, It is like it is vaper locked. The oil looks like it has liquid refregrant in it,It looks all bubbles,foam-- when it starts it will be 110 at pump-10.5 psi at filter, the oil is clean--new oil filters-- this has been going on for 5 #ucking years, I get no support from service. I think I will just have to live with it? Will not run it in a lead unit-- should have gotten a York!!
check and see if compressor is not flooding if it is then check charge, temp sensors and exv, also check your motor cooling solenoid and motor temp sensor.
I will do this on Monday, The unit is a E- Pack, a big package unit with cooling tower, pumps 2 systems with 4 compressors all in one unit--- Junk? I think so, It looks like a box car on a rail road train. I will post what I find out--- I am using staged loading- the oil temp. I will have to get, the unit does not have oil heaters on it, More info on Monday
Last edited by Mandanglelow; 02-03-2012 at 09:48 PM. Reason: More info
Ok I did some research and you have a 30HXA with a shared condenser. What is the ambient temp in you "package"?
I have 8 of these compressors,this is the only one that does this, the unit is in a tin can that the bottom is open to the outside. It is in El Segundo CA. The outside temp. Might get down to 47deg., I think it needs a oil heater package put on this unit. The unit seems to trip off at 1 or 2 AM. I will talk to my service rep. And see what He thinks--we still have a warranty on unit. Free fix !!L O L
Hello, I had a similar problemma, pre-lubrication of the pump collapsed retaining ring and the ball flew off with a spring hook on the lubricant to the compressor but the compressor is not passed to the oil filter when you turn on the lubrication that the ball overlaps the entrance to the compressor and the installation was published in error. There are photos but do not know how to add.
You need to let the service branch do it's job. You also need to properly inform them of your problems that you are facing. Are you using Carrier factory service for the repairs or the installing contractor (there is a difference). If you were having as many troubles as you are describing, the factory should have pulled the floundering tech and replaced with a more competent one. Complain to the branch manager of your service company for a more experienced tech. Sounds like an oil pump issue to me, that is where I would have started since it is on start up only.
model and serial of the unit may help got bunch of screw carrier information also experience ,please send picture if you can
Check the cooling tower sump heater. The towers should have sump heaters to keep the loop temp warm so you don't lose oil due to cold condenser temps. I have seen both failed heaters and also heaters that just aren't wired up so you get cold water in the condenser causing oil problems.
So only happening on circuit A? Both circuits oil pumps draw similar amps? Ever weighed the charge out of problem circuit(s)?