josua
05-12-2009, 08:03 PM
Good day all,
On board the vessel we have a one freezer and chiller room with one each fan/evaporator, they are using 2 Bitzer compressor (semi-hermetic) with R404a.
During normal operation there is ice on the freezer evaporator, compressor suction line and expansion valve, also the temp on the freezer room can’t reach -20 only can go till -14 max, especially if only the freezer solenoid valve open will be more ice. The suction press 1 bar and the discharge 17 bar, the evaporator fan working well with correct direction, when the two solenoid valve open (freezer & chiller) suction press 2 bar, discharge press 18 bar, temp compressor suction side -2 degree.
I try to completely defrost the freezer room and remove all the ice, after that I check the expansion valve filter strainer and clean, I’m also try to check and close all possibility hot air going inside the room as well as try to recharge but after I start the unit still the same problem appear.
We are using electric coil heating for defrost.
Before this unit was working well and freezer can reach -20, just yesterday the problem come.
So can you guys PLEASE help me with some advice to solve this problem? And please be gentle since I’m new on this kind of system.
if I miss something please tell me....
Thanks
On board the vessel we have a one freezer and chiller room with one each fan/evaporator, they are using 2 Bitzer compressor (semi-hermetic) with R404a.
During normal operation there is ice on the freezer evaporator, compressor suction line and expansion valve, also the temp on the freezer room can’t reach -20 only can go till -14 max, especially if only the freezer solenoid valve open will be more ice. The suction press 1 bar and the discharge 17 bar, the evaporator fan working well with correct direction, when the two solenoid valve open (freezer & chiller) suction press 2 bar, discharge press 18 bar, temp compressor suction side -2 degree.
I try to completely defrost the freezer room and remove all the ice, after that I check the expansion valve filter strainer and clean, I’m also try to check and close all possibility hot air going inside the room as well as try to recharge but after I start the unit still the same problem appear.
We are using electric coil heating for defrost.
Before this unit was working well and freezer can reach -20, just yesterday the problem come.
So can you guys PLEASE help me with some advice to solve this problem? And please be gentle since I’m new on this kind of system.
if I miss something please tell me....
Thanks