Manitowoc MD0420A Technician's Handbook

Contents

Manitowoc MD0420A Technician's Handbook Manual pdf 68 page image

68 Part Number 040005626 5/17Discharge Pressure High ChecklistImproper Installation• Refer to “Installation/Visual Inspection Checklist”on page 55.Condenser Air Flow• High inlet air temperature• Condenser discharge air re-circulation• Dirty condenser fins• Defective fan cycling control• Defective fan motorImproper Refrigerant Charge• Overcharged• Non-condensible in system• Wrong type of refrigerantOther• Non-OEM components in system• High side refrigerant lines/component restricted(before mid-condenser)Freeze Cycle Discharge Pressure Low ChecklistImproper Installation• Refer to “Installation/Visual Inspection Checklist”on page 55.Improper Refrigerant Charge• Undercharged• Wrong type of refrigerantOther• Non-OEM components in system• High side refrigerant lines/component restricted(before mid-condenser)• Defective fan cycle controlNOTE: Do not limit your diagnosis to only the itemslisted in the checklists.