Manitowoc QuietQube SD0672C Technician's Handbook page 213

CVD1476 Headmaster Control Valve Failure List
Condition
Discharge Pressure - Low
Liquid Line Temperature - Hot
Freeze Cycle Discharge Pressure - High
or
Freeze Cycle Discharge Pressure - Low
Discharge Pressure - High
Liquid Line Temperature - Hot
Discharge Pressure - normal or high
Liquid Line Temperature - Warm
Suction Pressure - Low
Probable Cause
Ice Machine Low on Charge
Water regulating valve maintains freeze cycle
discharge pressure
Verify water regulating valve is set and/or
operating correctly. - Headmaster valve is stuck in
bypass if water regulating valve is OK
Headmaster Valve not bypassing
Corrective Measure
Low on Charge Verification
Adjust or replace water
regulating valve
Replace headmaster valve
Replace headmaster valve