Service Manual
Table Of Contents
- General Information
- Model Numbers
- Installation
- Maintenance
- Troubleshooting
- Component Check Procedures
- Electrical Components
- Main Fuse
- ICE/OFF/CLEAN Toggle Switch
- Float Switch
- Ice Damper and Hall Effect Switches
- Selector Switch
- Dispense Lever Activated
- Touchless Sensor Activated
- Dispense Switch
- Touchless Sensor
- High Pressure Cutout Control
- Fan Cycle Control
- Low Pressure Cutout (LPCO) Control
- Compressor Electrical Diagnostics
- Diagnosing Start Components
- Refrigerant Recovery/Evacuation
- System Contamination Clean-Up
- Electrical Components
- Component Specifications
- Charts
- Diagrams
68 Part Number 000015432 4/18
Discharge Pressure Low Checklist
Problem Cause
Improper
installation
Refer to “Installation/Visual Inspection Checklist.”
Improper
refrigerant
charge
Undercharged
Wrong type of refrigerant
Other
Low ambient temperature
Non-Manitowoc components in system
High side refrigerant lines/component restricted
(before mid-condenser)
Suction pressure is too low and affecting
discharge pressure. (Refer to “Suction Pressure
Low Checklist.”)
No water or insufficient pressure
Expansion valve incorrectly adjusted
Defective compressor
Moisture in refrigeration system
NOTE: Do not limit your diagnosis to only the items listed
in the checklists.