Probable Cause:
Due to wrong capacity selection, the direct drive
motor is running too fast.
Wrong size pulley (low suction pressure).
Evaporator’s design capacity is less than the
actual load.
Remedy:
Reselect the compressor, replace direct drive,
motor for proper speed.
Reduce the compressor speed by installing the
proper size pulleys, or provide compressor
capacity control.
Match evaporator to load requirements.