woody100
30-11-2011, 07:59 PM
Hello,
I have a Mitsubishi PURY-P200 YMF-C with 3 fan coils attached, each with its own remote controller and a G 50a which only seems to be used for monitoring. The problem we are experiencing is in heating the head pressure is 300psi (on 407c) and the system eventually trips on high compressor shell temperature TH10 and does so every few hours. We have measured the temperature and it is rising to the cut out set point. We have removed the refrigerant and weighed it back in and then checked refrigerant level via the sub cooling and superheat as advised in the manual and all is in order. The condensing unit has no expansion device for the outdoor coils when in heating so i am assuming that the refrigerant is expanded in the BC box prior to reaching the distributor and then the outdoor coils.
The only thing i didn't record was superheat reaching the compressor in heating mode.
can anyone help?
I have a Mitsubishi PURY-P200 YMF-C with 3 fan coils attached, each with its own remote controller and a G 50a which only seems to be used for monitoring. The problem we are experiencing is in heating the head pressure is 300psi (on 407c) and the system eventually trips on high compressor shell temperature TH10 and does so every few hours. We have measured the temperature and it is rising to the cut out set point. We have removed the refrigerant and weighed it back in and then checked refrigerant level via the sub cooling and superheat as advised in the manual and all is in order. The condensing unit has no expansion device for the outdoor coils when in heating so i am assuming that the refrigerant is expanded in the BC box prior to reaching the distributor and then the outdoor coils.
The only thing i didn't record was superheat reaching the compressor in heating mode.
can anyone help?