Ice-O-Matic MFI Series, Service Diagnosis, Symptom, Possible Cause, Probable Correction, Page

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MFI Series

Service Diagnosis

Symptom

Unit makes ice, but very slowly

Water leak.

Possible Cause

•High discharge pressure because of a dirty condenser.

•Low capacity because the auger and evaporator are coated with mineral scale.

•Low suction pressure due to low refrigerant charge.

•Drain plugged up.

•Tubing cracked

•Condensation on drain tubing.

•Water hose off

•Reservoir cover off.

•Reservoir cracked.

•Evaporator water seal leaks.

Probable Correction

•Clean filter and condenser.

•Clean the water system.

•Locate leak. Recover the refrigerant, repair leak, replace drier, evacuate and weigh

in the nameplate charge.

•Clean out drain.

•Replace tubing.

•Insulate tubing.

•Reattach hose.

•Return cover to reservoir.

•Replace reservoir.

•Check base of evaporator and drip pan. If the seal leaks, shut off the water, remove the auger and replace the water seal.

Check the gear motor for water infiltration.

Excessive water use.

Excessive ice meltage.

Machine makes too much noise.

•Water cooled model, water regulating	•Adjust to 245 PSIG discharge
valve not adjusted properly.	pressure.
•Reservoir float valve leaks thru.	•Replace float valve or seat.
•Water cooled model, overcharged	•Recover and weigh refrigerant.
with refrigerant.	Weigh in correct charge.
•Water cooled model, condenser coated	•Acid clean the water cooled
with minerals.	condenser.
•Bin drain clogged	•Clean out bin drain.
•Improper installation of drains, they are	•Drains must be separate.
connected.
•Poor fit between bin door and door frame.	•Adjust or replace.
•Evaporator coated internally with minerals.	•Clean with ice machine
	cleaner.
•Motor bearing dry.	•Oil or replace motor.

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Contents SERVICE AND INSTALLATION MANUAL MFI Series Ice-O-Matic11100 East 45th Ave Denver, ColoradoPage MFI Series IntroductionKeep this manual for future reference PageTable Of Contents Table of ContentsMFI Series PageFreight Claim Procedure Inspect PromptlyVisible Loss or Damage Concealed Loss or DamageMFI Series WarrantyPage For the Installer Installation GuidelinesElectrical Specifications AdjustmentsMFI Series For The InstallerPage Ice Machine Specifications Bin ApplicationFor the Installer MFI SeriesLocation Storage BinIce machine Water LimitationsFor the Installer MFI SeriesAllow 6 “Clearance for Air Circulation PageFor the Plumber Water InletWATER COOLED MODELS AIR COOLED MODELSFor the Electrician Electrical ConnectionsWater Cooled Models Air Cooled ModelsFinal Check List For the InstallerMFI Series PageStart Up Pre-StartInspectionStart Up MFI SeriesComponent Description Air Cooled Model ShownMFI Series PageMFI Series Component DescriptionPotential Relay The compressor start relay PageMFI Series Component DescriptionPage Ice Sweep Bearing Breaker/Divider AugerTo Reset Electrical SequenceElectrical Sequence Shut DownOperation Water Water SystemMFI Series PageHigh Pressure Cut Out- Automatic Reset Low Pressure Cut Out- Automatic ResetOperation Performance Typical Low Side PressureSanitizing and Cleaning ICE MAKING SYSTEM In place cleaningscheduled at a minimum of twice a year KEEP OUT OF THE REACH OF CHILDRENBearing Maintenance Bearing MaintenanceNote Left Hand Threads MFI SeriesSensor Maintenance Bin Control SensorWater Sensor MFI SeriesMaintenance Air Cooled Clean the air cooled condenserMFI Series PageAuger Maintenance 1. Disconnect electrical power to the ice machineAuger 2. Turn off the water supply to the ice machineService Diagnosis SymptomPossible Cause Probable CorrectionService Diagnosis SymptomMFI Series Possible CauseControl System Diagnostics 4.High pressure cut out checkMFI Series PageR&R- Water Reservoir, Bin Control Water ReservoirBin Controls Ice Level Sensors MFI SeriesTo Remove the Breaker Bearing Assembly R&R-Bearingand BreakerMFI Series PageR&R-Auger To Remove the AugerMFI Series PageR&R-WaterSeal To Remove the Water SealRemoval of the Water Seal To Replace the Water SealR&R-Evaporator To Replace the EvaporatorTo Reassemble the Evaporator and Auger MFI SeriesTo Remove and Repair the Gear Motor Assembly R&R-GearMotorTo Check the Gear Motor To Inspect the Gear MotorTo Remove the Condenser Fan Motor Assembly R&R-FanBlade and MotorMFI Series PageRefrigeration System Service ServiceRefrigeration Instructions for Liquid Charging R404AMFI0500 Wiring Diagram Wiring Diagram MFI0500 Air, MFI0500 WaterMFI Series PageMFI Series MFI0800 Wiring DiagramPage MFI0805/1255 Wiring Diagram Wiring Diagram MFI0805, MFI1255 AirMFI Series PageMFI1256 Wiring Diagram Wiring Diagram MFI1256 AirMFI Series PageService History What to Do Before Calling for ServiceMFI Series Page