Manitowoc QuietQube SD0672C Technician's Handbook page 211

Grasp Here with Hands to Compare Temperatures
HARVEST CYCLE HEADMASTER 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 headmaster is functioning correctly.
The compressor discharge line is noticeably
warmer than the liquid line to the ice machine
receiver.
• Headmaster valve is not bypassing 100%.
Replace headmaster valve.
Part Number 80-1505-3 6/11
Step 3 Details
LIQUID LINE
FROM CONDENSER
211