–111–
5. Freeze cycle Head Pressure 220 psig (1517 kPa)
or higher?
If the head pressure is lower than 220 psig
(1517 kPa) refer to headmaster diagnostics.
6. Freeze cycle Suction Pressure normal?
Refer to analyzing suction pressure if suction
pressure is high or low.
7. Discharge line temperature is 160°F (71.1°C) or
higher at end of freeze cycle?
If less than 160°F (71.1°C) check expansion valve
bulb mounting and insulation.
8. Harvest cycle suction and discharge pressures are
lower than indicated in the cycle times/refrigerant
pressures/24 hour ice production chart?
Replace Harvest Pressure Regulating system
(HPR Valve and HPR solenoid valve).
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