Technician’sHandbookThis manual is updated as new information and models arereleased. Visit our website for the latest manual.www.manitowocice.comAmerica’s #1 Selling Ice MachineManitowocQM20/QM30/QM45SM50Q130/Q170/Q210/Q270UndercounterIce MachinesPart Number 80-0111-9 6/11

Manitowoc QM20 Technician's Handbook

Q210 series

safety notices

Model Numbers

Model/Serial Number Location

Owner Warranty Registration Card

Residential Warranty Coverage

General

Location of Ice Machine

Leveling the Ice Machine

Electrical Service

Water Service/Drains

Water Supply and Drain Line Sizing/Connections

Before Starting the Ice Machine

Installation Checklist

Component Identification

Ice Making Sequence of Operation

Energized Parts Chart

Operational Checks

Water Level Check

Interior Cleaning and Sanitizing

Ice Machine Inspection

Cleaning the Condenser

Removal From Service Winterization

Checklist

Safety Limit Feature

Safety Limits

before calling for service

How to Read a Model Number

QM20/QM30

Ice Machine Warranty Information

Ice Machine Clearance Requirements

SM50/QM20/QM30

Electrical Requirements

Electrical Specifications

Cooling Tower Applications

COMPONENT IDENTIFICATION QM45/Q130/Q170/Q210/Q270

q270 ice machines

SM50

Air-cooled Condenser

QM45/Q130/Q170/Q210/Q270

Cleaning and Sanitizing Procedure

Cleaning Procedure

Sanitizing Procedure

Sanitizing

Removal from Service/Winterization

Water-cooled Ice Machines

Automatic Shut-off

Harvest Sequence

Freeze Sequence

that Will Not Run

Circuitry

Ice Production Check

Water System Checklist

Ice Formation Pattern

Analyzing Discharge Pressure

Analyzing Suction Pressure

Hot Gas Valve

Temperatures

Discharge Line Temperature Analysis

Chart

Final Analysis

Refrigeration Component Diagnostic Chart

Refrigeration Diagnostics

Electrical

Flooding Expansion Valve

Ice Machine Will Not Harvest

Ice Quality Is Poor — Cubes are Shallow, Incomplete or White

Production

Is Produced

Discharge Pressure High Checklist

Main Fuse

Bin Switch

Bin Thermostat

Liquid Line Thermistor

Diagnosing Start Components

ON/OFF/WASH Toggle Switch

Ice Thickness Probe

Ice Thickness Check

Compressor Electrical Diagnostics

Compressor Drawing Locked Rotor

Fan Cycle Control

High Pressure Cutout (HPCO) Control

Filter-Driers

Refrigerant Recovery/Evacuation

Refrigerant Re-use Policy

Recovery and Recharging

System Contamination Cleanup

Procedure

Removing Refrigerant Charge

Replacement

Valves

QM20/QM30/SM50

general information section

installation instructions

Operational Checks General

Ice Bridge Thickness

safety limit feature

ice machine

general information

model numbers

electrical service

installation checklist

operation section

energized parts chart

operational checks

interior cleaning and sanitizing

ice machine inspection

commercial ice machine warranty

residential ice machine limited warranty

nettoyage et désinfection intérieurs

nettoyage du condenseur

liste de vérification

garantie commerciale de la machine à glaçons

garantie limitée résidentielle de la machine à glaçons

before starting the ice machine

COMPONENT IDENTIFICATION

evaporator compartment

Shut-off

Ice Machine Will Not Run

Diagnosing Ice Thickness Control Circuitry

Installation and Visual Inspection Checklist

Analyzing Discharge Line Temperature

Analyzing Suction temperature

Liquid Line Filter-Driers

Q270 Condenser Fan Motor Replacement

Refrigerant Temperature Charts

Q210 Self-contained Air-cooled

Q270 Self-contained Air-cooled

Wiring Diagrams

Q210

Q270

Electronic Control Boards

Tubing Schematic

Q270 series

QM45 Series

Q130 series

Q170 series

QM20 Series

QM30 Series

SM50 series

Manitowoc QM20 Technician's Handbook

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