Komatsu PC88MR-10 Shop Manual page 1370

80 Appendix
Testing (dual) pressure switch for refrigerant
When replacing the dual pressure switch, refrigerant must be collected in advance.
a If resistance between the switch-side terminals from connector P17 is shorted (ON), perform
"Troubleshooting for compressor and refrigerant system".
80-46 PC88MR-10