SUCTION PRESSURE HIGH CHECKLIST Problem
•Cause
Improper Installation
•Refer to “Installation/Visual Inspection Checklist”
Discharge Pressure
•Discharge pressure is too high, and is affecting suction pressure, refer to “Freeze Cycle Discharge Pressure High Checklist”
Improper Refrigerant Charge
•Overcharged
•Wrong type of refrigerant
•Non Condensable in system
Other
•
•Hot gas valve leaking
•Defective compressor
•Water inlet valve leaking
SUCTION PRESSURE LOW CHECKLIST Problem
•Cause
Improper Installation
•Refer to “Installation/Visual Inspection Checklist”
Discharge Pressure
•Discharge pressure is too low, and is affecting suction pressure, refer to “Freeze Cycle Discharge Pressure Low Checklist”
Improper Refrigerant Charge
•Undercharged
•Wrong type of refrigerant
Other
•
•Improper water supply over evaporator refer to “Water System Checklist”
•Loss of heat transfer from tubing on back side of evaporator
•Restricted/plugged liquid line drier
•Restricted/plugged tubing in suction side of refrigeration system
NOTE: Do not limit your diagnosis to only the items listed in the checklists.
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