CYCLE TIMES, 24 HR ICE
PRODUCTION AND REFRIGERANT
PRESSURE CHARTS
These charts are used as guidelines to verify correct ice machine operation.
Accurate collection of data is essential to obtain the correct diagnosis.
•Refer to “OPERATIONAL ANALYSIS CHART” for the list of data that must be collected for refrigeration diagnostics. This list includes: before beginning service, ice production check, installation/visual inspection, water system checklist, ice formation pattern, safety limits, comparing evaporator inlet/outlet temperatures, hot gas valve analysis, discharge and suction pressure analysis.
•Ice production checks that are within 10% of the chart are considered normal. This is due to variances in water and air temperature. Actual temperatures will seldom match the chart exactly.
•Zero out manifold gauge set before obtaining pressure readings to avoid misdiagnosis.
•Discharge and suction pressure are highest at the beginning of the cycle. Suction pressure will drop throughout the cycle. Verify the pressures are within the range indicated.
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