Compact CMS050A004 - Discharge Pressure High;Low Checklists

48
DISCHARGE PRESSURE HIGH CHECKLIST
Problem
• Cause
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
Restricted Condenser Air Flow
• High inlet air temperature
• Condenser discharge air re-circulation
• Dirty condenser fins
• Defective fan motor
Improper Refrigerant Charge
• Overcharged
• Non-condensable in system
• Wrong type of refrigerant
Other
• Non-Manitowoc components in system
• High side refrigerant lines/component restricted
(before mid-condenser)
FREEZE CYCLE DISCHARGE PRESSURE LOW
CHECKLIST
Problem
• Cause
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
Improper Refrigerant Charge
• Undercharged
• Wrong type of refrigerant
Other
• Non-Manitowoc components in system
• High side refrigerant lines/component restricted
(after condenser)
• Ambient temperature too low
NOTE: Do not limit your diagnosis to only the items
listed in the checklists.