Hi There

We replaced a bristol compressor on a +- 48000 BTU Hideaway York Heat Pump A/C Unit. Fitted a Bio Flo Filter Drier and used a dial a charge to charge the correct amount of refrigerant into the system. We ran the unit in cooling pressures and temperatures are normal. In heating we noticed liquid back to the compressor pressures are normal. Once every +- 10 days of operation the unit switches of on HP safty set at 2400 kpa. We noticed that every time the unit goes off on a safty the indoor fan speed is set on auto and they are running the unit in heating. We are concerned about the liquid back and why out of the blue will the unit pressures be fine when we have placed the gauges on but +- 10 days latter the unit HP Trips out. Any help would be appreciatted.

Regards

Lyle ( Cape Town )