Ice-O-Matic EF Series Expansion Valve Diagnosis Symptom, Problem, Remedy, Production Check

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Flake Ice Machines

Refrigeration System

Expansion Valve Diagnosis

Symptom

Single Evaporator Machine

1.Evaporator flooded but suction pressure too high. Compressor has been checked and appears to be good. Suction line at compressor may be colder than normal.

2.Evaporator starved, no frost on line exiting evaporator. Suction pressure low.

Dual Evaporator Machine

1.Evaporator flooded but suction pressure too high. Compressor has been checked and appears to be good. Suction line at compressor may be colder than normal.

2.One evaporator starved and one evaporator properly flooded, suction pressure lower than normal.

Problem

a.TXV sensing bulb uninsulated or not making good contact with suction line.

b.TXV sensing bulb in wrong location.

c.System overcharged.

d.TXV stuck open.

a.Machine low on charge.

b.TXV restricted or stuck closed.

a.Machine low on charge.

b.TXV restricted or stuck closed.

c.System overcharged.

d.An expansion valve stuck open.

a.TXV restricted or sticking closed.

Remedy

a.Clean suction line and clamp bulb securely. Insulate bulb.

b.Relocate sensing bulb to top of suction line.

c.Recover refrigerant and weigh in correct charge.

d.Replace TXV.

a.Recover refrigerant and weigh in correct charge.

b.Replace TXV and filter- drier.

a.Recover refrigerant and weigh in proper charge.

b.Replace TXV and filter- drier.

c.Recover refrigerant and weigh in correct charge.

d.Replace TXV.

a. Replace defective TXV

Production Check

Check ice production by allowing the machine to produce ice into a container for 15 minutes. If the machine has 2 evaporators, be sure to collect the ice from each evaporator separately so that production from each evaporator can be checked. Weigh the ice in each container and multiply the weight by 96. This will give you the approximate production in a 24 hour period.

Weight of ice produced in 15 minutes X 96 =production in 24 hours.

Note: Verify that the condenser is clean and the inlet water temperature and level is correct prior to performing a production check.

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Contents Service and Installation Manual Page Flake Ice Machines Table Of ContentsHow To Use This Manual Model and Serial Number Format Model Numbers EF 80 0 a General InformationSerial Number Date Code Page RLA LRA Electrical and Mechanical SpecificationsElectrical Specifications Installation Guidelines Ambient Operating TemperaturesAdjustments DrainsEF Series EMF Series EMF Series 48 Inch Wide A10 ICE-O-Matic Parts and Labor Domestic & International Limited WarrantyEvaporator Float Gear Reducer Belt Auger Motor General OperationMaintenance Procedure Scheduled MaintenanceCleaning and Sanitizing Instructions Winterizing Procedures Winterizing ProceduresCabinet Care Cleaning Activity Cleaning AgentMethod of Application How To Use The Troubleshooting Trees Troubleshooting TreesMachine Runs, Does Not Make Ice Flake Ice Machines Machine Does Not Run Slow Production Low Production High Suction Pressure Machine Freezes Up Auger Seizes Auger Motor Amp Draw Fluctuates Water Leaking From Bottom of Evaporator Machine Produces Wet Ice C12 Noise Coming from Evaporator Water System Water SystemFloat Valve and Reservoir Water Seal and Lower O-Ring Drip BootDrive System Drive SystemCoupler Evaporator and Internal Components Evaporator DisassemblyRemove 2 setscrews Evaporator Barrel and Auger Inspection Bearings, Water Seal and O-Rings Evaporator Reassembly Seal Face InstallationExploded View of the Evaporator Refrigeration System and Components Refrigeration SystemCompressor Page Refrigerant Pressures EF/EMF450A Page Water Cooled Condenser High Pressure SafetyWater Regulating Valve Air Cooled Condenser RemoteExpansion Valve Problem Expansion Valve Diagnosis SymptomRemedy Production CheckEvaporator Remote Condenser Remote SystemMixing Valve L.A.C., Headmaster Pump Down System Remote Only Mixing Valve Diagnosis Problem Possible Cause RemedyLiquid Line Solenoid Refrigerant ReceiverMethod of Charging Refrigerant F14 Electrical System Selector SwitchControl Circuit ContactorCapacitors Overload ExternalStart Relay Bin Control Safety ControlThermostatic Bin Control Auger Motor Relay Mechanical Bin ControlPump Down Control Compressor DelayEF250/255/405 EF450A/W 9071694-01 EF800A/W 9071963-01 EMF450/405A/W 9071958-01 EMF800A/W EMF705/1005/1006A/W 9071956-01 EMF1106R EMF2306A/W EMF2306R EMF2305L 9071959-01 Page

EF Series, EMF Series specifications

Ice-O-Matic is a recognized leader in the ice-making industry, known for its innovative technologies and commitment to quality. Among its flagship products are the EMF Series and EF Series ice machines, designed to meet the demands of various commercial environments. These machines combine advanced features with user-friendly functionalities, making them suitable for restaurants, bars, hotels, and convenience stores.

The EMF Series stands out with its capability to produce ice in a range of styles, including half cubes, full cubes, and gourmet ice. This versatile output makes it an excellent choice for establishments that require different ice types for various applications. The EMF machines are designed with a built-in storage bin, optimizing floor space while ensuring a continuous supply of ice. With production capabilities that can range from 200 to 800 pounds of ice per day, they cater exceptionally well to high-volume demands.

On the other hand, the EF Series focuses on efficiency and reliability. Featuring modular designs, these machines can be stacked or used in tandem, providing flexibility for businesses as their needs evolve. The EF Series offers a robust production range, capable of generating up to 1,500 pounds of ice daily, allowing it to service larger venues without sacrificing performance. The high-density foam insulation ensures that ice stays intact longer, reducing waste and enhancing overall efficiency.

Both series are equipped with Ice-O-Matic’s innovative Pure Ice technology, which not only ensures high-quality ice but also addresses concerns related to water quality. The built-in water filter options reduce impurities, resulting in clearer and more appealing ice. Additionally, these machines utilize an easy-to-clean design, promoting hygiene and maintenance simplicity. The front-access service doors facilitate straightforward maintenance, further minimizing downtime in busy environments.

Both EMF and EF Series machines are energy-efficient, boasting ENERGY STAR certifications. They are built with an environmentally friendly refrigerant, which helps establishments reduce their carbon footprint while saving on energy costs.

In conclusion, Ice-O-Matic's EMF and EF Series ice machines bring together cutting-edge technology, versatility, and efficiency, making them prime choices for any commercial establishment seeking reliable ice production. Their superior design features, user-friendly maintenance, and commitment to quality ensure that they meet the varied demands of the foodservice industry while promoting sustainability.
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