Manitowoc QY0874C

–163–
FREEZE CYCLE HEADMASTER CONTROL VALVE
FAILURE LIST
CVD0875/CVD1075/CVD1475/CVD1875/CVD2075
Valve not maintaining pressures
 Non-approved valve. Install a Manitowoc head
pressure control valve with proper setting.
Discharge pressure extremely high; liquid line
entering receiver feels hot
 Valve stuck in bypass. Replace valve.
Fan cycling control cycles condenser fan motor;
liquid line entering receiver fluctuates between
warm and cold
 Valve not bypassing. Replace valve.
Discharge pressure low; liquid line entering
receiver feels warm to hot
 Ice machine low on charge. Refer to “Low on
Charge Verification.”
Fan cycling control cycles condenser fan motor;
liquid line entering receiver feels warm to hot
 Ice machine low on charge. Refer to “Low on
Charge Verification.”
CVD0675
Valve not maintaining pressures
 Non-approved valve. Install a Manitowoc head
pressure control valve with proper setting.
Discharge pressure extremely high; liquid line
entering receiver feels hot
 Valve stuck in bypass. Replace valve.
Discharge pressure low; liquid line entering
receiver feels cold
 Valve not bypassing. Replace valve.
Discharge pressure low; liquid line entering
receiver feels warm to hot
 Ice machine low on charge. Refer to “Low on
Charge Verification.”