I have been using the Carrier flowtronic monitor program for several years. On the program it displays the exv output signal from the processor (in steps ) and the actual position of the valve( feed back). I often find the sensors out of calibration causing the problem however I have found several valves getting stuck as well as clogged liquid line driers.I find that a lot of mechanic 's with out the software tend to guess and just part change. Using the out dated software is very helpfull in troubleshooting I would recommend it to everyone.
Any idea where can I get The DOS based software called Flotronic Manager? We have two of this chillers on campus and both of them have problems with the EXV's. Two of them have been replaced already and problem continues, need help.
Shoot me an email. I'll send you the software. It will be a *.zip file that you'll need to save to disk. You will need to read the IOM that's in the zip file and order the interface from Telebyte. It's not something that we provide.
The EPROM everyone was referring to contains the operating parameters or software program for the unit. the older the machine..the older the program.
There were many revisions to the software programs on the 30GB's.
Your local rep for Carrier Tech support is George Bradshaw out of Greensboro. He can help you with any future problems on the EPROMs. The older machines had issues with headpressure control, number of fans coming on during start-up... etcc.
The reason so many people suggest the sensors is due to the high number of sensors that read a few degrees off. When they go bad the unit shuts down...when they drift...the unit runs high superheat, low superhheat, oil washes out..oil pressure drops...refrigerant and oil mix to show a high oil level but you still get low oil pressure...condenser fans don't cycle properly due to the condenser sensor drifting...etc..
Was the old chiller barrel leaking at the tubesheet?
Have not read entire thread, but am having the same problem with my 080 chiller. I have found that the c/fans are not cycling properly and bringing all c/fans with single compressor unloaded (1 stage). The only fan that does not come on is the other circuit c/fan being controlled by Motormaster. Would not think it is a sensor issue as it doesn't matter which circuit starts first, A or B, the same thing happens, although it doesn't seem to affect B circuit like it does A circuit (2 compressors), and the common part to that would be the board.
I can't find any info on the relay board for troubleshooting.
We are in the low 40's and my understanding from the manual is that #1 fan energizes with compressor (currently controlled by Motormaster) and other fans stage based on sensor input. #1 fan is on MM, which I believe was field installed at installation and not factory.
Anyway, still need to verify sensors, but any input on this would be greatly appreciated.