Overcondensing that much?!

[Sandro Baptista]

...or its syphoning back up into condenser .
You could add more refrigerant to see what happens .

Paul, can you explain us how is connected the air condenser to the receiver?
Do you have "P" traps?

Is the liquid receiver located at a very warmer place compared with the ambient temperature?

[paul_h]

There is no traps that I have noticed (there's an oil separator next to the compressor).
I'd say the receiver is warmer than the ambient or the condenser.
The remote condenser is on the roof, and it's winter here, ambient was 17C today.

The receiver is sitting just above the compressor inside the factory, and the machine (patkol pk-1500) is in a factory with other ice machines so warmer than ambient where the receiver is right now, especially with the heat from the compressor.