Komatsu PC88MR-10 Shop Manual page 1333

80 Appendix
Outline of refrigeration cycle
If there is an insufficient quantity of refrigerant, all of it will be evaporated while it is passing through the
evaporator. This causes evaporator efficiency to deteriorate, which will result in defective air conditioning.
If there is excessive refrigerant, not all of it will be evaporated and part of it will be sucked into the
compressor in liquid form, which will cause the compressor to compress the liquid and may damage the
components.
If water gets into the refrigeration circuit, it will freeze at a small hole in the expansion valve, lower the
refrigerant flow, and may result in defective air conditioning.
PC88MR-10 80-9