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Manitowoc QM45 Series - User Manual

Manitowoc QM45 Series
44 pages
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Part Number: 040001360 6/14
UnderCounter Ice Machines
QM45 Models
Installation, Operation and Maintenance Manual
This manual is updated as new information and models are released. Visit our website for the latest manual.

Table of Contents

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Questions and Answers

  • L
    leebriannaJul 30, 2025
    What to do if my Manitowoc QM45 Ice Maker runs but no ice is produced?
    • Q
      qjohnsonJul 30, 2025
      If your Manitowoc Ice Maker is running but not producing ice, there might be several reasons: * Ensure the ice machine has a water supply. * Verify the incoming water pressure is within the range of 20-80 psi (1.4-5.5 bar). * Check if the spray nozzle is blocked with mineral buildup; if so, clean and sanitize the ice machine. * Confirm the ambient temperature is between 50°F and 110°F (10°C and 43°C). * Refer to thermistor diagnostics.
  • J
    john54Aug 6, 2025
    Why is the freeze cycle long and ice production low on my Manitowoc Ice Maker?
    • J
      Jessica CarrAug 6, 2025
      A long freeze cycle and low ice production in your Manitowoc Ice Maker can be due to several factors: * The water temperature might be too high. Connect the machine to a cold water supply and check the check valves in faucets and other equipment. * The condenser might be dirty. Clean the condenser. * The air temperature entering the condenser may be too high. Ensure it does not exceed 120°F (39°C). * The water inlet valve filter screen could be dirty. Remove the water inlet valve and clean the filter screen. * The water inlet valve might be stuck open or leaking. Turn off the ice machine; if water continues to enter, verify water pressure and replace the valve if necessary. * There might be a refrigeration problem. Refer to refrigeration diagnostics.
  • C
    cherylcunninghamAug 15, 2025
    How to troubleshoot a Manitowoc QM45 that will not harvest?
    • M
      Mr. Jeremy WeaverAug 15, 2025
      If your Manitowoc Ice Maker is not harvesting, here are a few things you can check: * Verify cubes are present in the evaporator and the freeze time exceeds the freeze chart cycle time. * Observe the control board light: a steady light indicates normal thermistor operation. * Reset the ice machine. * Verify the water inlet valve is energized during the entire harvest cycle and water flow is normal. * Check for power at the hot gas valve.
  • J
    jesse29Aug 22, 2025
    Why is the ice quality poor in my Manitowoc Ice Maker?
    • R
      Richard JohnsonAug 22, 2025
      Poor ice quality in your Manitowoc Ice Maker, such as shallow, incomplete, or white cubes, can stem from: * A dirty ice machine. Clean and sanitize it. * Poor water filtration. Replace the filter. * An improperly working water softener (if applicable). Repair the water softener. * Poor incoming water quality. Contact a qualified company to test the water and recommend appropriate filters.

Summary

General Information

Model Numbers and Accessories

Lists available models and optional accessories for the ice machine.

Water Filter and Cleaning Solutions

Information on Tri-liminator filters and approved cleaners/sanitizers.

Installation Instructions

Location Criteria and Heat Rejection

Requirements for machine placement and heat output data.

Leveling the Ice Machine

Detailed steps to ensure the ice machine is properly leveled.

Installation Instructions

Electrical Service Requirements

Covers voltage, fuse/circuit breaker, and electrical rating specifications.

Water Supply and Drain Connections

Guidelines for connecting water supply and drain lines, including important considerations.

Installation Instructions

Water and Drain Line Sizing

Specifies tubing sizes and connection details for water inlet and drain lines.

Installation Instructions

Installation Checklist

A comprehensive checklist of items to verify before and after installation.

Pre-Operation Inspection and Preparation

Guidance on inspecting the machine and preparing it for initial operation.

Operation

Ice Making Sequence Overview

Details the step-by-step process of ice making from start-up to harvest.

Harvest and Automatic Shut-Off

Explains the ice release process and how the machine stops when the bin is full.

Operation

Operational Checks and Siphon System

Performing essential operational checks and verifying the siphon system's function.

Water Float Valve Function

Verifies the float valve's open position for correct water flow into the trough.

Operation

Water Level and Ice Thickness Adjustment

Verifying correct water level and adjusting the ice thickness probe for optimal production.

Maintenance

Interior Cleaning and Sanitizing Procedure

Step-by-step guide for cleaning and sanitizing internal components of the ice machine.

Maintenance

Ice Thickness Probe and Water Tube Cleaning

Instructions for cleaning the ice thickness probe and removing the water distribution tube.

Maintenance

Float Valve and Disassembly Steps

Procedures for removing the float valve and disassembling inner components.

Maintenance

Water Trough and Ice Damper Removal

Steps for removing the water trough and the ice damper for cleaning.

Maintenance

Bin Door Removal and Cleaning Preparation

Instructions for removing the bin door and preparing for cleaning procedures.

Maintenance

Sanitizing Procedures and Exterior Cleaning

Sanitizing removed parts and guidelines for cleaning the exterior surfaces.

Maintenance

Condenser Cleaning and Winterization

Procedures for cleaning the condenser and preparing the machine for storage.

Customer Support

Troubleshooting Checklist

A guide to diagnose and resolve common ice machine operational issues.

Customer Support

Safety Limit Feature and Capacity Issues

Understanding safety limits that stop the machine and causes of low ice capacity.

Customer Support

Commercial Ice Machine Warranty Details

Explains the terms and conditions of the commercial ice machine warranty.

Customer Support

Residential Ice Machine Warranty Information

Outlines the warranty terms and conditions for residential ice machines.

Manitowoc QM45 Series Specifications

General IconGeneral
BrandManitowoc
ModelQM45 Series
CategoryIce Maker
LanguageEnglish

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