Compressor Oversized

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.



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.