Manitowoc QuietQube Series Technician's Handbook page 164

Grasp Here with Hands to Compare Temperatures
HARVEST CYCLE HEAD PRESSURE CONTROL VALVE
FAILURE LIST
Temperature of the compressor discharge line and liquid
line to the ice machine receiver feel the same 30 seconds
into the harvest cycle.
• The head pressure control valve is functioning
correctly.
The compressor discharge line is noticeably warmer than
the liquid line to the ice machine receiver.
• Head pressure control valve is not bypassing 100%.
Replace head pressure control valve.
164
Step 3 Details
LIQUID LINE
FROM CONDENSER
Part Number: 000015431 Rev01 5/19