I have an 80 ton Carrier Chiller. Model 30GTN080-920. I keep getting the T114 alarm. This is written on the manual:
Circuit A Low Suction
If EXV is greater than
10%, and either suction
superheat is less than
19 F (10.6 C) or saturated
suction temperature is
greater than MOP for
Circuit A shutdown
after first daily
Faulty expansion valve
or EXV board, faulty
suction gas thermistor
(T7) or cooler thermistor
I have just taken the oil to the compressors, the oil was veryyyy thin, mostly because it has been a long time since an oil change. The oil had no metal dust, so assume that the compressor should be ok. The oil was red due to a red dye, put 1 year ago. Besides this I'll pull out all the refrigerant to make a vacuum and leave the circuit like new.
The thermistors seems to be ok. The EXV board should be ok too, because the circuit B works fine. The cooler (flow of water) I think is also ok, again because circuit B works fine.
So everything leads me to the EXV Valve:
VALVE ASY,EXV(STD,CKT A) Part N° 32GB402554
What do you think? If the EXV valve is faulty, is there a repair kit or something like that? Because it costs nearly one thousand bugs.
You guys are the genius, so please help me find the solution. Maybe is not the exv valve maybe it is..... you'll know