This is regarding the refrigeration system for a water cooler. The evaporator is immersed in the water to be cooled. The following information is available at 25 mins after starting the compressor:
When water temperature was 7.8 deg. C
Evaporator Inlet: 0.7 deg. C
Suction: 23 deg. C
Discharge: 72.6 deg. C
Condenser: 53.6 deg. C
Liquid Line: 54 deg. C
Compressor Power consumption: 100 W
Cooling capacity (averaged over a period of 20 mins): 62 W
Ambient: 35 deg. C

Note that steady state wasn't achieved yet. The cooler cuts off cooling beyond this point. Earlier, we thought that undercharging is the issue. But the condenser and evaporator pressures are high, and that doesn't support this theory. The throttling device is capillary tube and condenser is wire and tube type. Any suggestions on the possible reasons for this problem?