The high pressure cutout switch is located on the receiver/dryer.
HCPO switch opens at 360 psig (2482 kPa) and closes at 240 psig (1655 kPa)
1. Check the refrigeration system for high discharge pressure and correct as needed.
2. Check the High Pressure Cutout switch for proper operation (closed under normal conditions). Check the switch for excessive reistance. The nominal switch resistance is less than 1 ohm.
3. Check the High Pressure Cutout switch circuit as shown by Service Procedure D01A.