Part Number 80-1505-3 6/11 161
Suction Pressure Low Checklist
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
page 151
Discharge Pressure
• Discharge pressure is too low and is affecting
suction pressure – refer to “Freeze Cycle
Discharge Pressure Low Checklist” page 156
Improper Refrigerant Charge
• Undercharged
• Wrong type of refrigerant
Other
• Non-Manitowoc components in system
• Improper water supply over evaporator – refer to
“Water System Checklist” page 152
• 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
• TXV starving
NOTE: Do not limit your diagnosis to only the items
listed in the checklists.
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