Suction Pressure Low Checklist - Manitowoc QF0400 Technician's Handbook

Suction Pressure Low Checklist

Problem
Improper
installation
Discharge
pressure
Improper
refrigerant
charge
Other
NOTE: Do not limit your diagnosis to only the items
listed in the checklists
152
Cause
Refer to "Installation/Visual Inspection
Checklist."
Discharge pressure is too low and is
affecting suction pressure. Refer to
"Discharge Pressure Low Checklist."
Undercharged
Wrong type of refrigerant
Non-Manitowoc components in system
Restricted/plugged liquid line drier
Restricted/plugged tubing in suction side of
refrigeration system
Expansion valve starving
No water or insufficient pressure
Moisture in refrigeration system
Dirty Evaporator
Defective Fan Cycle Control
Remote condenser or remote condensing
units - Defective Head Pressure Control
Part Number 80-1230-9 10/10