Manitowoc SMS050A

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Part Number 000001590 Rev03 11/19

SM Model Ice Machines

Installation, Operation and Maintenance Manual

Original Document

,

Caution

Read this instruction before operating this equipment.

Engineered for Ease

Table of Contents

Questions and Answers:

G
Gregory FisherAug 8, 2025
What to do if my Manitowoc SMS050A runs but no ice is produced?
- M
  Monica BranchAug 8, 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.
H
Haley Snyder DDSAug 15, 2025
Why is the freeze cycle long and ice production low on my Manitowoc SMS050A Ice Maker?
- D
  danawelchAug 15, 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.
D
Dale JonesAug 22, 2025
How to troubleshoot a Manitowoc SMS050A Ice Maker that will not harvest?
- M
  Morgan SextonAug 22, 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.
B
barbarafreemanAug 30, 2025
Why is the ice quality poor in my Manitowoc SMS050A Ice Maker?
- D
  Dr. Teresa PerryAug 30, 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.

Manitowoc SMS050A Specifications

General

Brand	Manitowoc
Model	SMS050A
Category	Ice Maker
Language	English

Summary

Safety Information

General Safety Precautions

Read manual, routine adjustments, website, high voltage/refrigerant, indoor use.

Installation Safety Guidelines

Precautions for installation: codes, stability, equipment weight, level, bin compatibility.

Electrical Safety Guidelines

Electrical requirements: codes, grounding, disconnect means, wiring connections.

Safety Symbol Definitions

Definitions for DANGER, Warning, Caution, and Notice symbols.

Operational Safety Warnings

Precautions for operating and maintaining equipment: crush/pinch hazards, slippery surfaces.

Hazard and Misuse Warnings

Dangers related to flammable vapors, fire/shock risk, and improper equipment use.

General Information

Model Identification

Details on model numbers and how to read them.

Serial Number Location

Information on where to find the model and serial number decal.

Available Accessories

Description of optional accessories like legs and drain pumps.

Warranty Details

Information on warranty coverage, registration, and verification.

Installation Guide

Installation Prerequisites

Requirements for installation including drain, electrical, and water supply.

Machine Dimensions and Cut-Outs

Physical dimensions of the ice machine and cut-out dimensions for built-in installations.

Ice Machine Location and Clearances

Criteria for selecting an appropriate location and required clearances.

Leveling and Leg Options

Instructions on how to level the machine and install optional legs.

Electrical Service Requirements

Details on electrical circuit preparation, voltage, grounding, and GFCI.

Water Supply and Drain Requirements

Guidelines for water supply lines, drain connections, and line sizing.

Step-by-Step Installation Procedure

A sequential guide for installing the ice machine.

Reversing Door Swing

Procedure for reversing the direction of the ice machine door swing.

Installation Checklist

A checklist to ensure all installation steps are completed correctly.

Operation

Component Identification

Diagrams and labels identifying key components of the ice machine.

Control Panel Overview

Explanation of the control panel buttons, lights, and functions.

Delay Start Functionality

How to use the delay start feature to postpone ice making.

Sequence of Operation

Step-by-step description of the ice making process.

Bin Thermostat Adjustment

Instructions on how to adjust the bin thermostat for ice level control.

Cube Weight Adjustment

Procedure for adjusting the freeze cycle time to control cube weight.

Maintenance Procedures

General Cleaning and Sanitizing

Overview of cleaning frequency and recommended cleaners/sanitizers.

In-Place CleaningSanitizing

Procedure for cleaning and sanitizing without complete disassembly.

Detailed Cleaning Procedure

Comprehensive cleaning steps, including component removal and cleaning.

Part Removal for Cleaning

Instructions for safely removing parts for cleaning and sanitizing.

Specific Component Maintenance

Procedures for maintaining water shutters and the ice chute.

Spray Bar and Pump Maintenance

Instructions for disassembling the spray bar and removing the water pump.

Filter and Grill Maintenance

Procedure for replacing the water filter and removing the front grill.

Condenser Cleaning and Storage

Steps for cleaning the condenser and preparing the machine for long-term storage.

Troubleshooting

Troubleshooting Checklist

A checklist of common problems, possible causes, and corrective actions.

Common Operational Problems

Solutions for issues like no operation, thick ice, slow harvest, poor quality cubes.

Low Ice Capacity Issues

Addresses causes and solutions for reduced ice production capacity.

Safety Limit Feature Explanation

Explanation of built-in safety limits and the procedure to restart the machine.

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