Ice-O-Matic MFI User's Manual
Contents
1.2. 2 Unscrew the ice sweep 5 Inspect the bearing There should be plenty of grease in sight If grease is neede
3. these minerals requiring a more frequent removal than twice per year If in doubt AVERTISS about the condition of the evaporator and auger the auger can be removed so the parts can be inspected TN Note Water filters can filter out suspended solids but not dissolved solids Soft water may not be the complete answer Check with a water treatment specialist regarding water treatment For more information on removal of these parts see Removal
4. ee un wx ees c Ice Sweep d 2 eN FER Fa KON Allen Screws Me x Breaker Bearing and Auger Assembly d Breaker Cover Page 20 MFI Series Service Diagnosis Symptom No ice is made nothing operates No ice auger motor is turning Possible Cause Unit off due to no power Unit off due to master switch in OFF position Unit off due to low water level Unit off due to ice level sensors Photo Eyes blocked Unit off due to scale on water level sensor Unit off due to high pressure control open Auger motor hums but does not turn Unit is shut down Low pressure control open No power to circuit board Circuit board gear motor relay will not close Compressor contactor coil is open Compressor will not start Page 21 Probable Correction Restore Power Switch master Switch to ON Check water supply filter strainer float valve Correct water supply eCheck clean ice level sensors Clean water level s
5. XHALST AIR ELECTRICAL INLET WATER INLE 3 8 FLARE RAIN 3 4 SIDE_VIE AIR MODEL Os NOTE DIMENSIONS INCHES CENTIME IERS 2 11 REMOTE DISCHARGE OUTLET ei MALE COUPLING DI a gt 3 10 Vi 1 3CM REMOTE ONLY ES REMIT MALE 7 Fe TEN AO 0 96 32 24 00 60960 REMOTE CONDENSER JUNCTION BOX E LIQUID INLET COUPLING 4 3 8 REMIT 10CM E ONLY y 2 REMOTE ONLY CONDENSER INLET 3 8 LOCM he WATER COOLED ONLY ELECTRICAL INLET 329 34 WATER INLET 3 8 10CM FLARE a 361 95 CI 42 we To CX BIN MNTG HOLES X E CONDENSER DRAIN 13CM 1 2 7 LOU WATER COOLED ONLY 465 86 DRAIN 3 4 19CM FPL 3 4 panem PX 163 41 08 raw er SIDE VIEW Z 0X 2 66 6756 ATER 8 REMOTE MODELS d GO RJU Ss FAR VIEW SEMDTE M JELS W r1 X ER gt AIR INTAKE AA Q5 Q
6. Gear Assembly a gt MFI Series R amp R Fan Blade T Motor To Remove the Condenser Fan Motor Assembly 1 Disconnect electrical power to the ice machine 2 Remove top panel and the service panels 3 Unplug the fan motor wire leadsfrom the fan motors 4 Remove the two 2 head bolt from the top end of the fan motor assembly Fig 1 5 Lift up the fan motors and bracket assembly about 1 2 inch and pull out the fan assembly out the right service access hole Fig 2 Repair as needed To Reassemble Place the fan motor assembly lower flange holes over the two Allen head cap screws in the base and install the hex head bolts at the top of the assembly Plug the fan motors back in and replace the panels e N OD Fig 1 Fig 2 Page 30 MFI Series Refrigeration System Service Refrigeration Service General This ice machine uses R404A refrigerant and polyolester oil Do NOT use mineral oil in this refrigeration system e When the refrigeration system is serviced a special liquid line drier is required It is included with replacement compressor eR404A is not compatible with mineral oil so these ice machines use Polyolester oil Polyolester oil absorbs water very easily A system opened for service must be re sealed as soon as possible 15 minutes maximum e Special leak detection equipment is required to locate small refrigerant leaks Usually a leak detector capable of detecting Halongena
7. hen 15 As the ice machine uses water from the reservoir continue to pour the sanitizer solution into the reservolr 16 After half 1 2 of the sanitizer solution has been added to the reservoir and the reservoir is nearly empty switch the master switch OFF 17 Drain the reservoir and thoroughly wash the interior of the reservoir and cover with sanitizer solution 18 Remove the block from the float in the water reservoir 19 Switch the master switch to ON 20 Continue ice making for at least 15 minutes to flush out any cleaning solution Switch the master switch OFF Note DO NOT USE any ice produced from the cleaning solution Be sure no ice remains in the bin 21 Remove and discard all ice from the storage bin 22 Add warm water to the ice storage bin and thoroughly wash and rinse all surfaces within the bin 23 Sanitize the bin interior by thoroughly washing the interior of the bin and bin door with the balance of the sanitizing solution 24 Switch the master switch ON 25 Replace the panels Warning Ice machine cleaner contains acids If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN Page 16 MFI Series Bearing Maintenance Bearing Maintenance The bearing in the breaker should also be checked at least two 2 times per year DANGE Switch the machine OFF and ch
8. ede r ED M 5 4S alot nj uS 213 Par PTER d s LE a Mr ERE AULUS D PEE buena nns hr 2 SOA c r KH SER PT oa t9 xt Ma z f 6 ETT OP ee ar i LV PA Ys ay pi 3 s R 4 A pM hev PE PN OV EV EV EY RER T i X 5 La E M T 4 NOCH Fr 5 SN a i wer RA pa VE E 3 Pa E sj E m cygyspi p P PES T Veg ur Te ra vA TS TT PORZE D EE SIL Wee I eee Sirs oi SEL es Ta NIMM Ate Ken QUON NA BP SRC ORAN KATRE L MI M R PE EN i ERA ri 5 ES la a 2 al syter Lb re AU TE DUST Gr Val Da Y ryje A ERE SOON IT IRER Ne a ode NS aA Seer ad PEE a KA 3 fs gS tru Der awe Pol M t Ry wn ENE Motor Ext ee ke ien pL Ser RR zo Te y Sg Aree re ae DEUS Ka Pai tr P T i ar M P vir Water Seal M hese SORES 5 hi4 KART Lr oP up E TR ale ES i R RH sa d Y Jer TR M3 UL Page 12 MFI Series Electrical Sequence Electrical Sequence There are 7 indicator lights on the control board eWTR OK Water OK Green Normal Glowing Glow when there is water in the reservoir ePWR OK Power OK Green Normal Glowing Glows when the power board has power and is functional eService Red
9. lce O Matic SERVICE AND INSTALLATION MANUAL MFI Series u LLL LLL Pv 0 Mii HA e m m 99 0 0 _ mw J Ice O Matic 11100 East 45th Ave Denver Colorado 80239 Part Number 9081358 01 17 3168 01 Date 10 08 MFI Series Introduction How To Use This Manual Ice O Matic provides this manual as an aid to the end user and service technician in installation and maintenance of the MFI Series ice machines Do not attempt to perform installation start up or maintenance unless you have read and fully understand this manual If at any time you encounter conditions that are not addressed in this manual call E mail or write the Ice O Matic Service Department Ice O Matic 11100 E 45 Ave Denver Co 80239 Attn Technical Service Department E Mail Tech service Qiceomatic com Telephone Numbers Any Service communication must include 800 423 3367 All Departments e Model Number 888 349 4423 Technical Assistance Only e Serial number 303 371 3737 e detailed explanation of the problem Keep this manual for future reference The MFI Series Service Parts Manual is available separately Ice O Matic icemakers and dispensers are not approved for outdoor installation WARNING Always disconnect electrical power and shut off water supply w
10. WOTTON MFI Series Bin Application The MFI Series is designed to fit the following Ice O Matic Bins eB42 using Bin Top KBT 24 eB25 B40 B55 using Bin Top KBT19 eB100 using Bin Top KBT 23 one unit or KBT 22 two units eB120 5150 B170 Not designed for MFI Series Dispenser Application Flaked ice is not dispensable Ice Machine Specifications For the Installer MFI0500AS MFIOS00WS MFIO800AS MFIO806AS MFIOS06WS MFIOS05AS MFI1256AS MFI1255AS 21x24x27 21x24x27 21x24x27 21x24x27 21x24x27 21x24x27 21x24x27 21x24x27 115 60 1 115 60 1 115 60 1 208 230 60 1 208 230 60 1 230 50 1 208 230 60 1 230 50 1 Air Water Air Air Water Air Air Air Page 3 15 8 14 4 19 5 10 2 10 2 10 10 11 30 13 40 15 15 15 15 20 24 20 24 36 36 MFI Series For the Installer Location Ice O Matic ice machines are designed to be installed indoors in a controlled environment Install the ice machine in a location where it has enough space around it to be accessible for service A minimum of 6 inches must be allowed at the back for air circulation on air cooled models Try to avoid hot dirty and crowded locations Be sure that the location of the machine is within the environmental limitations Storage Bin
11. Check and clean any water treatment devices if any are installed Remove screws and the front and top panel Move the ON OFF switch to OFF Remove all the ice from the storage bin Remove the cover from the water reservoir and block up the float Drain the water reservoir and freezer assembly using the drain tube attached to the freezer water inlet Return the drain tube to its normal upright position and replace the end cap Prepare the cleaning solution Mix eight 8 ounces of ice machine cleaner with three 3 quarts of hot water The water should be between 90 115 F 8 Slowly pour the cleaning solution into the water reservoir until full Wait 15 minutes then switch the master switch ON 9 As the ice machine begins to use water form the reservoir continue to add more cleaning solution to maintain a full reservoir 10 After all of the cleaning solution has been added to the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 18 to sanitize the ice machine water system 13 Mix two 2 gallons of sanitizer solution Use an approved sanitizer A possible sanitizer solution may be obtained by mixing two 2 gallons of warm 90 115 F potable water with one 1 ounce of bleach 14 Slowly pour the sanitizer solution into the water reservoir until the float rises then switch the master switch SJ
12. overcharged with refrigerant Water cooled model condenser coated with minerals Bin drain clogged Improper installation of drains they are connected Poor fit between bin door and door frame Evaporator coated internally with minerals Motor bearing dry Page 22 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 nsulate 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 Adjust to 245 PSIG discharge pressure Replace float valve or seat Recover and weigh refrigerant Weigh in correct charge Acid clean the water cooled condenser Clean out bin drain Drains must be separate Adjust or replace Clean with ice machine cleaner Oil or replace motor MFI Series Control System Diagnostics The Control System consists of eControl Board e Water Sensors e ce Sensors eHigh Pressure Cut Out el ow Pressure Cut Out If the unit is OFF check the control board 1 Is the Power OK light on If not check power to the unit If it has power and the Power OK light is not on check the high pressure and
13. 1 Lubricate the water seal with water and push the water seal into the bottom of the evaporator slightly past the groove for the snap ring 2 Replace the snap ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant Such as 732 RTV on the area of the auger where the water seal is to be mounted 5 Carefully push the water seal Rubber side against the auger shoulder and the silastic Caution DO NOT get any silastic onto the face of the seal 6 Allow the auger and seal to air dry until the silastic is dry on the surface 7 If the original water seal was leaking it would be a good idea to inspect the interior of the gear motor Replacing the Water Seal _____ j Here R amp R Water Seal Water m Seal BS Retaining pm N vag i en ty m E Mb URS a if A d E TX i S ci 4 M ri A 3 oi s F RE eh Fi ws ON Place Food Grade Sealant MFI Series R amp R Evaporator To Replace the Evaporator Assuming all steps for removal of the thrust bearing breaker auger and water seal have been performed 1 Recover the refrigerant from the ice machine 2 Unsweat the refrigerant connections a At the thermostatic expan
14. Diagram Wiring Diagram MFI0805 MFI1255 Air 17 2702 01 FUN CAP START CAP 5 1 POTENTIAL R RELAY F 5 Y CONTACTOR BU BU Y 3 2 1 GN 5 4 3 CO UD ed 65 C Bu a Br MODE SWITCH CIRCUIT BOARD CONTROL BOX BU LOVER GNRL BU R BEN Lt BK BR BK R BK gt BK R BK BU H RE COND FAN AIR COOLED ONLY BIN FULL EMITTER LED CONDUCTIVITY PROBE BIN FULL DETECTOR PHOTO TRANS EARTH GROUND SEE NAMEPLATE FOR SUPPLY VOLTAGE AND MAX FUSE SIZE BK ae R RI s Y COMPRESSOR D NC X CENTRIFUGAL SWITCH START SA OLD TH H L USE COPPER CONDUCTORS ONLY THIS UNIT MUST BE GROUNDED AUGER DRIVE MOTOR ALL CONTROLS SHOWN IN ICE MAKING MODE Page 34 POWER SUPPLY CONDUCTIVITY PROBE PRINTED CIRCUIT 1 IR ASSEMBLY LED OLPC HPO MODE PHOTO TRANSISTOR SWITCH COM 2 1 F MOT NO AUGER DRIVE AUGER DRIVE RELAY COM ar No CONTACTOR COMP RELAY 2 F T1 MOT i FAN co MPRESSOR AIR COOLED ONLY R MOT START CAP 5 1 112 tr POT 2 5 FOTRELAY MFI Series MFI1256 Wiring Diagram Wiring Diagram MFI1256 Air 17 2678 01 BU PONER SUPPLY RUN 0 BU CONDLCT IVITY PROBE CAP START LOWFESS HIGHFRESS CAP CONTROL CONTROL BU V BK R 1 POTENTIAL R DN RELAY i EARTH GROUND LG BK pe SEE NAMEPLATE i BK 8 FOR SUPPLY VOLTAGE AND MAX FUSE SIZ
15. Re grease bearings with Ice O Matic PN6051062 01 bearing grease d Replace top seal and check the O Rings replace if cut or torn 8 Reverse to reassemble Specific tools and materials are required to install properly a Add food grade grease such as Ice O Matic PN6051036 01 to the seal area before installing on the auger b Check the seal to shaft areas for cuts or rough spots none are permitted 23 ND Fig 1 Fig 2 Fig 3 Bearing qa 3 ak FE Ice Sweep OF Seals Sum E y EN AE z Le LJ Ba Z c gt INT Breaker Cover i e in 41 b SEN Page 25 MFI Series R amp R Auger Noe To Remove the Auger 1 Disconnect electrical power 2 Turn off the water to the machine 3 Unclip the evaporator drain hose pull it down and drain the evaporator into the bin or container Remove the top panel Swing bail clip down and remove the ice chute cover Unscrew ice sweep Remove ice chute body The auger and breaker bearing may now be removed as an assembly a Unscrew four 4 Allen head cap screws holding breaker to evaporator b Lift up on breaker and remove auger from evaporator Note If the auger is stuck the breaker must be removed from the auger 9 The breaker may be removed from the auger and evaporator without disturbing the auger a Unscrew breaker cover from the breaker Note Left hand Threads b Unscrew auge
16. behind it are two plastic bin control mounts Slide each bin control to the left and disconnect the electrical leads connecting the bin control to the circuit board Reverse to reassemble be certain that the bin controls are aligned so that the ice level sensors are visible centered through the holes in the ice chute ROD Page 24 MFI Series R amp R Bearing and Breaker Note Removal of the auger water seal evaporator and gear motor must begin at the top of the assembly uli li To Remove the Breaker Bearing Assembly Disconnect electrical power 111 Remove panels Push back bail clamp and remove ice chute cover Unscrew and remove ice sweep Lift up and remove ice chute The breaker may be removed from the auger and evaporator without disturbing the auger a Unscrew breaker cover from breaker Note Left Hand Threads b Unscrew auger stud from top of auger Fig 1 c Unscrew four 4 Allen head cap screws holding breaker to evaporator Fig 2 d Lift up and remove breaker bearing assembly from auger and evaporator Fig 3 7 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press IS needed b Replace lower seals before installing new bearing in breaker Note Seals must be pressed in with a tool pushing against the outer edge only they will not install by hand c Replace parts as required
17. located on the back panel for the voltage requirements and minimum circuit ampacity The ice machine requires a solid chassis to earth ground Connect the ice machine to its own electrical circuit so it is individually fused Voltage variation must remain within the limitations even under starting conditions Note All external wiring must conform to national state and local electrical codes The use of a licensed electrician is required to perform the electrical installation Power Water Cooled Models Supply Electrical Inlet Air Cooled Models Page 7 MFI Series Final Check List 4 E RE S E BH E E E H For the Installer Is the ice machine installed indoors in a location where the air and water temperatures are controlled and where they do not exceed the design limitations Is there an electrical service disconnect within sight of the installed machine Has the voltage been checked and compared to the nameplate requirements Have all the plumbing connections been made and checked for leaks Is the ice machine and storage bin level Is there a minimum of 6 inches of clearance at the back of the machine for proper service access and air circulation Is the water pressure a minimum of 20 psig Has the ice machine been secured to the bin Is there clearance over the top of the ice machine for service access Is there a water shut off valve installed near the ice machine Have all the shipping block
18. low pressure cut outs If they are both closed replace the board If the POWER OK light is ON go to the next step 2 Is the Water OK light on If it is go to the next step If not check the water level in the reservoir If there is water in the reservoir check that the water sensor is plugged in To check the water sensor a Unplug the water sensor b Pull the water sensor from the reservoir c Place one ohmmeter lead on the sensor s plug and the other on the sensor s tip The meter should show nearly zero 0 resistance If it reads infinite resistance check the tip for corrosion If it is clean and still reads open replace the sensor OR connect a copper wire to the wire where the water sensor plugs into and place the other end in the water The WATER OK should go ON If it does not replace the board 3 Ice sensor Check Is the BIN FULL light OFF If it is OFF and the SERVICE light is OFF and the unit is not running replace the control board a If itis OFF and the auger motor is running but the compressor is not check the compressor contactor coil b If itis ON the ice sensors may be blocked Remove them and check for mineral scale 4 High pressure cut out check a Disconnect electrical power b Pull the wires off the high pressure cut out c Use an ohmmeter to determine if the switch is OPEN If it is check the discharge pressure If the discharge pressure is less than 300 PSIG replace the high pressure cut out d If
19. that only gas is flowing into the system e When the proper charge is indicated on the scale shut off the manifold COND valves 9 Shut off the valve on the refrigerant drum 10 Re open the manifold valves until all liquid SCALE has flowed out of the hoses 11 Shut the low side access valve on the ice machine 12 Remove hoses from ice machine and replace all caps Hose Connection Schematic for Liquid Charging Page 31 MFI Series MFI0500 Wiring Diagram Wiring Diagram MFI0500 Air MFI0500 Water 56 W SEMBLE Hrs REESE JA PTE QN HELE E 6 KIM Page 32 MFI Series MFIOS00 Wiring Diagram Wiring Diagram MFI0800 Air MFI0806 Air MFI0806 Water 17 2703 01 T5 B LOW PRE CONTROL BU V i n P se Cp POTENTI R W BK 72 e x EARTH GROUND 5 8 0 z 1 SEE NAMEPLATE BK S Bo FOR SUPPLY VOLTAGE URS AND MAX FUSE SIZE JUNCTION BOX USE COPPER CONDUCTORS ONLY THIS UNIT MUST BE GROUNDED PE db OMPRESSOR T BK lO FAN gt Og NC 3 2 m 5 20 2 CENTRIFUGAL GN d6 4 AIR COOLED re ONLY BK BIN FULL EMITTER LED 3 OU VEE AUGER DRIVE ss 6 5 4 BK PROBE BLISS D BU 9 B ite 7 BIN FULL ALL CONTROLS SHOWN m MEA DETECTOR IN ICE MAKING MODE PHOTO TRANS sma MOTE i CONTROL BOX Page 33 MFI Series MFI0805 1255 Wiring
20. the high pressure cut out is open and the system has high discharge pressure check for the cause 5 Low pressure cut out check a Disconnect electrical power b Pull the wires off the low pressure cut out c Use an ohmmeter to determine if the switch is OPEN If it is check the suction pressure If the suction pressure is greater than 20 PSIG replace the low pressure cut out d If the low pressure cut out is open and the system has low suction pressure check for the cause Page 23 MFI Series R amp R Water Reservoir Bin Control Water Reservoir TROND CO NI IM ler Remove the front panel Disconnect water inlet tube from reservoir inlet fitting To remove float valve push in locking tabs as shown To remove reservoir pull up and remove water sensor Disconnect water outlet tubes Remove mounting screws from reservoir bracket and Reverse to reassemble Disconnect electrical power supply Shut off water supply to the ice maker and pull float up Note The plunger seat is available separately as a part remove reservoir from ice maker G n vul EX Float Assembly Locking Tabs alimentati dns 11 1 Ice Chute Slide Bin Controls to Remove Bin Controls Ice Level Sensors Disconnect electrical power supply Remove the front panel Remove the control box cover Locate ice chute at the base of the chute in front of and
21. vut o decim abr Dog F H R fat MA RU TN SALG wi ua ly duc PG Bee vor x wer e Ice Chute 5 Evaporator Drain Evaporator Water Inlet Drain Page 14 MFI Series Operation Performance Beginning at the compressor the refrigerant is compressed into a high temperature gas The discharge line directs this gas to the condenser At the condenser air or water cooled the gas is cooled by either air or water and then it condenses into a liquid This high pressure liquid then goes through the liquid line to the expansion valve The thermostatic expansion valve meters liquid refrigerant into the evaporator the volume of liquid refrigerant depending upon the temperature of the evaporator At the evaporator the refrigerant enters an area of relatively low pressure where it can easily boil off or evaporate As it evaporates it absorbs heat from the evaporator and whatever is in contact with it Such as water inside it After the evaporator the refrigerant now a low pressure vapor goes through the suction line back to the compressor where the cycle is repeated Typical Low Side Pressure Air Cooled 34 38 PSIG Typical Discharge Pressure Air Cooled 220 275 PSIG Typical Compressor Amp Draw MFIO500AS 115 60 1 8 9 Amps MFIO500WS 115 60 1 8 9 Amps MFIO800AS 115 60 1 8 9 Amps MFIO806AS 208 230 60 1 5 6 Amps MFI0806WS 208 230 60 1 5 6 Amps MFIO
22. wires attached to 1 and 2 move centrifugal switch actuator up and down to simulate motor rotation If the ohmeter does not show any change replace the switch or motor If the ohmeter showns an open circuit replace the switch or motor Prin ahi To Remove and Repair the Gear Motor Assembly Assuming that the procedures through removal of the water seal have been performed 1 Remove the electrical wires from the gear drive motor 2 Unscrew the four 4 cap screws holding the gear motor to the base of the machine remove the gear motor from the machine Note Bench test the gear motor check for oil leaks noise and amp draw To Inspect the Gear Motor 1 Remove the cap screws holding the gear motor case halves together and pry the two cases apart 2 To lift off the cover lift up until you can feel internal contact then pull the cover towards the output gear end and lift up the cover with drive motor attached up and away from the gear motor case Note The gearcase cover output bearings and output shaft are a pressed together assembly 3 Inspect the oil gears and bearings If there is evidence of water in the oil rusty metal too much oil white oil replace the oil and damaged parts 4 The oil charge is 14 ounces Do not overfill 5 Reassemble and bench test the gear motor check for oil leaks noise and amp draw Water Shed Auger Drive Motor Rotor Bearing Cover and Output
23. 000 the Company plant or EXW Incoterms 2000 the Company authorized distributor without cost to the Customer that part of any such machine that becomes defective In the event that the Warranty Registration Card indicating the installation date has not been returned to Ice O Matic the warranty period will begin on the date of shipment from the Company Irrespective of the actual installation date the product will be warranted for a maximum of seventy two 72 months from date of shipment from the Company ICE model cube ice machines which are registered in the Water Filter Extended Warranty Program will receive a total of eighty four 84 months parts and labor coverage on the evaporator plate from the date of original installation Water filters must be installed at the time of installation and registered with the Company at that time Water filter cartridges must be changed every six 6 months and that change reported to the Company to maintain the extended evaporator warranty No replacement will be made for any part or assembly which I has been subject to an alteration or accident II was used in any way which in the Company s opinion adversely affects the machine s performance Ill is from a machine on which the serial number has been altered or removed or IV uses any replacement part not authorized by the Company This warranty does not apply to destruction or damage caused by unauthorized service using other than Ice O Matic authoriz
24. 805AS 230 50 1 5 6 Amps MFI1256AS 208 230 60 1 5 6 Amps MFI1255AS 230 50 1 5 6 Amps Typical Auger Drive Motor Amp Draw MFIO500AS 115 60 1 4 0 to 4 5 Amps MFIO500WAS 115 60 1 4 0 to 4 5 Amps MFIO800AS 115 60 1 4 0 to 4 5 Amps MFIO806AS 208 230 60 1 1 6 to 3 8 Amps MFI0806WS 208 230 60 1 1 6 to 3 8 Amps MFIO805AS 230 50 1 1 6 to 3 8 Amps MFI1256AS 208 230 60 1 1 6 to 3 8 Amps MFI1255AS 230 50 1 1 6 to 3 8 Amps Expansion Valve Superheat 6 8 degrees High Pressure Cut Out Automatic Reset 450 PSIG Low Pressure Cut Out Automatic Reset 15 PSIG Refrigerant Charge R404A MFI0500 Air Cooled 22 Ounces MFI0500 Water Cooled 18 Ounces MFI0800 Air Cooled 24 Ounces MFIO806 Air Cooled 24 Ounces MFI0806 Water Cooled 20 Ounces MFI0805 Air Cooled 24 Ounces MFI1256 Air Cooled 36 Ounces MFI1255 Air Cooled 36 Ounces Page 15 MFI Series Sanitizing and Cleaning It is the USER S RESPONSIBILITY to keep the ice machine and ice storage bin in a sanitary condition Without human intervention sanitation will not be maintained Ice machines also require occasional cleaning of their water systems with a specifically designed chemical That chemical dissolves mineral build up that forms during the ice making process Sanitize the ice storage bin as frequently as local health codes require and every time the ice machine is cleaned and sanitized Note Maintenance and Cleaning should be scheduled at a minimum of twice a year ICE MAKING SYSTEM In place cleaning
25. E 2 T USE COPPER CONDUCTORS ONLY OT THIS UNIT MUST BE GROUNDED OONTACTCR BU e Th BK C BU Y R R 5 COMPRESSCR VA M R 4 gt ol NC 32a CENTRIFUGAL GN 46 8 A AIR COOLED start sa SWH ind OLI BK KDH HQ Rs BINFULL RUN EMITTER BK gt LED 2 320 AUGER DRIVE BU 2 CONDUCTIVITY 6 A BK PROBE MOTOR 04 BU 9 8 7 R7 BINFULL m a ALL CONTROLS SHOWN iN OT RELAY gt CONTROLS SHOWN ICE MAKING MODE MODE SWITCH CIROUIT BOARD BK PHOTOTRANS CE MAKING MODE CONTROL BOX Page 35 MFI Series Service History What to Do Before Calling for Service eCheck the water supply to the ice machine The ice machine is designed to shut off if there is no water to it Check the water filters if there are any eCheck the power supply to the ice machine Reset the breaker if it is tripped elf both water and power have been checked and are available try switching the power OFF and then ON After 2 minutes the machine should restart If this procedure restarts the machine service should be called the next time the machine stops Model Number Serial Number Install Date Page 36
26. H OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS PRODUCT EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY Filing a Claim All claims for reimbursement must be received at the factory within 90 days from date of service to be eligible for credit All claims outside this time period will be void The model the serial number and if necessary proof of installation must be included in the claim Claims for labor to replace defective parts must be included with the part claim to receive consideration Payment on claims for labor will be limited to the published labor time allowance hours in effect at the time of repair The Company may elect to require the return of components to validate a claim Any defective part returned must be shipped to the Company or the Company authorized distributor transportation charges pre paid and properly sealed and tagged The Company does not assume any responsibility for any expenses incurred in the field incidental to the repair of equipment covered by this warranty The decision of the Company with respect to repair or replacement of a part shall be final No person is authorized to give any other warranties or to assume any other liability on the Company s behalf unless done in writing by an officer of the Company GOVERNING LAW This Limited Warranty shall be governed by the l
27. Normally Off eFreeze Red Normally glowing when making ice eBin Full Red Normally Off when making ice eLED1 White Located next to the Control Board s Compressor Relay Normally glowing when making ice eLED2 White Located next to the Control Board s Auger Motor Relay Normally glowing when making ice If the machine is switched OFF at the mode switch but otherwise ready to go switching the mode switch ON does the following e The PWR OK light glows elf there is water in the float reservoir the WTR OK light glows eAfter 10 seconds the Freeze LED1 and LED3 lights glow and the machine starts up Start Up e he compressor relay and auger motor relay become energized connecting power to the windings of the auger motor and contactor coil e he contactor is energized connecting power to the compressor and the compressor starts eAs ice is made it passes between the ice level sensors but because it is not a continuous stream it only interrupts the sensor s infrared beam momentarily The bin full light remains off and the machine stays on until ice builds up in the bin and blocks the path between the sensors for 6 seconds or longer When that occurs the bin full light glows and the machine shuts down Shut Down e he compressor relays opens LED1 goes out e The compressor contactor opens e The auger motor stays on for 1 more minute clearing out ice in the evaporator and then e The auger motor relay opens LED3 goes ou
28. Remove the bin packaging Tip the storage bin on its back using parts of the packaging to protect the exterior finish Remove the skid and install the legs into the threaded holes in the bottom of the bin Turn the leg levelers all the way in preparation for leveling later Return the bin to the upright position Note Do not push the bin into position but lift it there Pushing a bin especially one with ice in it can cause damage to the bin legs and mounts Install the appropriate bin top according to the instructions provided with the bin top Ice machine The ice machine is heavy so the use of a mechanical lift is recommended for lifting the machine high enough to install on top of the bin After the unit is placed on the bin line it up so it is even with the back side Secure the ice machine to the bin with the hardware provided with the ice machine Remove the front panel and remove any shipping blocks or packaging material Proper functioning of the bin door requires the bin door when it is opened to be in a stable position If the ice machine is too far forward on the bin the opened door may not be stable resulting in an unexpected closing of the bin door If the ice machine is to be mounted on a bin or dispenser other than an Ice O Matic refer to the manufacturer s instructions for machine mounting lce O Matic will not be responsible for damage or injury that results from unexpected closing of the bin door as a result of the ice
29. and Replacement dre BUNTE IE Disconnect electrical power to the ice machine circuit d alime Turn off the water supply to the ice machine i 3 To remove the auger remove the front and top panels E Push back the bail clamp holding the ice chute cover to the ice chute and remove cover Remove ice chute from evaporator Remove four 4 Allen screws holding breaker to evaporator Drain the evaporator by lowering and uncapping the evaporator drain hose Pull up to remove the auger After the auger has been removed allow the auger to dry if the auger is not bright and shinny it must be cleaned 9 Clean the auger and evaporator as required DO NOT HONE THE EVAPORATOR 10 Replace the water seal 11 Reverse to reassemble
30. aws of the state of Delaware U S A excluding their conflicts of law principles The United Nations Convention on Contracts for the International Sale of Goods is hereby excluded in its entirety from application to this Limited Warranty Mile High Equipment LLC 11100 East 45 Avenue Denver Colorado 80239 303 371 3737 January 2007 Page iv MFI Series For the Installer Installation Guidelines For proper operation of the Ice O Matic ice machine the following installation guidelines must be followed Failure to do so may result in loss of production capacity premature part failures and may void all warranties Ambient Operating Temperatures Minimum Operating Temperature 50 F 10 Maximum Operating Temperature 100 F 88 C Note Ice O Matic ice makers and dispensers are not approved for outdoor installation Incoming Water Supply Minimum incoming water temperature 40 F 4 5 C Maximum incoming water temperature 100 F 38 C Minimum incoming water pressure 20 psi 1 4 bar Maximum incoming water pressure 80 psi 5 6 bar Note If water pressure exceeds 80 psi a water pressure regulator must be installed Drains All drain lines must be installed per local codes Flexible tubing is not recommended Route bin drain vented float overflow drain and water condenser drain individually to a floor drain The use of condensate pumps for draining water is not recommended by Ice O Matic Ice O Matic assumes no responsibility
31. ay Do Not Return Damaged Merchandise to Ice O Matic Page iil MFI Series Warranty Ice O Matic Parts and Labor Domestic amp International Limited Warranty Mile High Equipment LLC the Company warrants Ice O Matic brand ice machines ice dispensers remote condensers water filters and ice storage bins to the end customer against defects in material and factory workmanship for the following e Cube ice machines GEM model compressed ice machines e Ice storage bins Twenty four 24 month parts and labor MFI model flake ice machines and remote condensers Thirty six 36 months parts and labor e EF and EMF model flake ice machines Twenty four 24 e IOD model dispensers Twenty four 24 months parts Twelve 12 months months parts and labor labor e CD model dispensers Thirty six 36 months parts and e Water filter systems Twelve 12 months parts and labor not including filter labor cartridges An additional twenty four 24 month warranty on parts excluding labor will be extended to all cube ice machine evaporator plates and compressors GEM model compressed ice machine compressors and MFI model flake ice machine compressors from the date of original installation An additional thirty six 36 month warranty on parts excluding labor will be extended to all EF and EMF model flake ice machine compressors from the date of original installation The company will replace EXW Incoterms 2
32. d a inch per foot fall is the minimum acceptable pitch for the drain There should be a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped and vented floor drain Use only inch rigid tubing eWater Cooled Models Connect a separate drain line to the 1 2 inch condenser drain connection at the back of the cabinet Do not vent this drain eStorage Bin Connect a separate gravity type drain line to the ice storage bin drain Vent this drain if there is a long horizontal run from the bin to the floor drain Insulation of this drain line is recommended WATER COOLED MODELS e RN R AIR COOLED MODELS 4 Ip 1 Pa A E 0 S Condenser M P P f A DE Water Filter gt UH Water Filter FA eX amp Mm e d Vented Drain s e Hand Valve g pe y Hand Valve B P Condenser Drain E Lp in E Fn J p sr a a L 1 A Bs nag 1 Via 4 ri d 1 FER Il F FEF IB Hf A yg 1 A A pg i ee oe AIT a Y Bin Drain gt waerm Vented Drain Vented Drain Condenser Inle Water Inle Water In sd Condenser Drain Floor Drain Page 6 MFI Series For the Electrician Electrical Connections Check the ice machine nameplate
33. d the bearing and breaker should be removed to check the action of the bearing It should rotate freely 3 Removing the water shed and unscrewing the breaker cover Note Left Hand Threads 6 To remove the breaker remove the lower ice chute then take out all four 4 Allen head cap screws and pull the breaker off the auger and evaporator 7 If the bearing only needs grease inject grease into the bearing using a grease needle 4 Unscrewing the auger stud See Removal and Replacement Section to replace bearings and seals Page 17 MFI Series Sensor Maintenance lide Bi Bin Control Sensor lt gt The bin control uses devices that sense light anu 3 therefore they must be kept clean enough so that they can see At least twice a year remove the bin control sensors from the base of the chute and wipe the inside clean as illustrated Water Sensor The ice machine uses a probe in the water reservoir to determine if there is water At least twice a year remove the probe from the reservoir and wipe the tip clean of mineral build up s Clean the probe s tip with ice machine cleaner and a soft MFI Series Maintenance Air Cooled Clean the air cooled condenser Air flow on this model is from front to back so the inside of the ice machine will have to be available to clean the air cooled condenser Use a vacuum cleaner or coil cleaner if needed DO NOT use a wire brus
34. e vy Allow 6 Clearance for Air Circulation A proper installation locates the Two Units on One Bin ice machine indoors but in a place where the heat and noise it produces are not objectionable Air cooled machines discharge hot air out the back and must have a minimum of 6 inches of clearance behind the ice machine opace for maintenance access is also important If two units are placed side by side on a bin side access becomes even more important Page 5 MFI Series For the Plumber Water Inlet eAir Cooled Models The recommended water supply is clean cold water Use 3 8 inch O D copper tubing connect to the 3 8 inch male flare at the back of the cabinet Install a hand valve near the machine to control the water supply e Water Cooled Models A separate 3 8 inch O D copper line is recommended with a separate hand valve to control it Connect to the 3 8 inch FPT condenser inlet at the back of the cabinet The water pressure to all lines must always be above 20 psig and below 80 psig eWater Treatment In most areas a water filter of some type will be useful In areas where the water is highly concentrated with minerals the water should be tested by a water treatment specialist and the recommendations of the specialist regarding filtration and or treatment should be followed Drains eAir Cooled Models Connect a rigid drain tube to the FPT drain fitting at the back of the cabinet The drain is a gravity type an
35. eck the bearing 1 Remove the chute cover
36. ed replacements risks of transportation damage resulting from adverse environmental or water conditions accidents misuse abuse improper drainage interruption in the electrical or water supply charges related to the replacement of non defective parts or components damage by fire flood or acts of God This warranty is valid only when installation service and preventive maintenance are performed by a Company authorized distributor a Company authorized service agency or a Company Hegional Manager The Company reserves the right to refuse claims made for ice machines or bins used in more than one location This Limited Warranty does not cover ice bills normal maintenance after install adjustments and cleaning Limitation of Warranty This warranty is valid only for products produced and shipped from the Company after January 2007 A product produced or installed before that date shall be covered by the Limited Warranty in effect at the date of its shipment The liability of the Company for breach of this warranty shall in any case be limited to the cost of a new part to replace any part which proves to be defective The Company makes no representations or warranties of any character as to accessories or auxiliary equipment not manufactured by the Company REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CUSTOMER MILE HIGH EQUIPMENT SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREAC
37. ensor Check for water interruption water cooled of fan motor failure eAuger can t turn Circuit board has not yet shut it down Circuit board has shut ice machine down due to high auger motor amp draw Check for cause of high amp draw including bearings gear motor condition and scale on auger and in evaporator Auger not turning due to motor failure auger relay failure on circuit board or or gears stripped Check drive train T XV restricted or not metering Check bulb temperature eLack of refrigerant check for leak Check for a restricted system Check harness Hi or low pressure cut outs open Check replace board Check replace contactor Check start capacitor Check start relay Check compressor windings MFI Series Service Diagnosis Symptom Unit makes ice but very slowly Water leak Excessive water use Excessive ice meltage Machine makes too much noise 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 Water cooled model water regulating valve not adjusted properly Reservoir float valve leaks thru Water cooled model
38. for improperly installed equipment Water Filtration A water filter system should be installed with the ice machine Clearance Requirements Self contained air cooled ice machines must have a minimum of 6 inches 15cm of clearance at the rear and sides of the ice machine for proper air circulation Stacking Ice O Matic MFI ice machines are not designed to be stacked Dispenser Application The MFI ice machine is approved for specific dispenser applications reference page 3 Electrical Specifications Refer to the serial plate at the rear of the ice machine to make sure proper voltage and circuit breaker size have been supplied Make sure the machine is on a dedicated circuit The MFI Series are not supplied with an electrical power cord and will need to be installed and wired per local electrical codes Adjustments Level the machine within 1 8 inch in all directions Adjust the cabinet or bin legs as required Check the bin control for proper operation Check the water level in the reservoir for proper adjustment Check the water regulating valve adjustment if water cooled Page 1 MFI Series For The Installer u 00 13 40 MIN AIR VENTILATION 6 00 152 40 MIN FOR AIR AIR VENTILATI 6 R F M CHUTE OPENING 2 5 69 85 BOTTOM
39. h e Disconnect electrical power and remove the air filter if applicable The filter may be cleaned or replaced e Clean the condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with a flashlight from the front to see if light can be seen through the condenser fins Step 1 Remove the Top Panel Step 2 Remove two screws and unplug fan motors Step 3 Pull fan motor assembly up and to the right to remove Step 4 Clean the condenser Step 1 Remove the Top Panel ET eg Step 2 Remove the top portion LE of the fan shroud Ns SE Step 3 Clean the condenser sat T Page 19 MFI Series Auger Maintenance Auger In some areas the water supply to the ice machine will contain a high concentration of minerals and that will result in an evaporator and auger becoming coated with
40. henever maintenance or repairs are performed on the ice machine and related equipment CAUTION Always wear protective eyewear whenever maintenance or repairs are performed on the ice machine and related equipment Pagei MFI Series Table Of Contents Table of Contents MOI Page Mable OLCONIENIS see Page ii FreightGl im Protedur Lauras Seen Page iii VASA Page iv For The instaler Gudenes TIR m Page 1 Ne PIER Page 6 POF INE BEGGE AN m Page 7 For The installer Check EU mm Page 8 SEA Uren Page 9 Component DeSerpllol aa 6 26cm ce eur pee potes a Reese eske Page 10 Electrical S duellee iie eii torem RM ILI I LEM IEEE Page 13 COD STATION VV AUC t m Page 14 Operablori Pertormari6 uwaa PASSE Ela Page 15 Santzng and Cleaning ac omm Page 16 Bearing MaintenaN GEren aaa a ea Page 17 SEN Or Mantenan E anea e A N Page 18 All Gooled MaInIENANCE va eee eee Page 19 PUGET MANENANEE watt oby o b kusk Page 20 Service DENS Saera PUE Page 21 Control System DIagrOSll S ues eod utram es 1 Page 23 Removal and Replacement Water Reservoir and Bin Controls cccccsseeeeeseeeeeseeeeeseeeeeeaees Page 24 Removal and Replacement Bearing and Breaker eese Page 25 Removal and Replacement Auger esses nenne nnne nnne
41. machine being too far forward on the bin Water Limitations An ice machine is a food manufacturing plant it takes a raw material water and transforms it into a food product ice The purity of the water is very important in obtaining pure ice and maximizing product life This section is not intended as a complete resource for water related questions but it does offer these general recommendations eCheck with a water treatment specialist for a water test and recommendations regarding water filters and treatment eln most cases the water used to make ice should be filtered or treated depending upon the water There is no one type of water filter that is effective in all situations That is why a water test in important RO Water Limitations Water conductivity must be no less that 35 microSiemens cm Notice Ice O Matic ice machines are designed and manufactured with the highest regard for safety and performance and meet or exceed the standards of UL NSF and CUL Ice O Matic assumes no liability or responsibility of any kind for products manufactured by Ice O Matic that have been altered in any way including the use of any part and or other components not specifically approved by Ice O Matic Ice O Matic reserves the right to make design changes and or improvements at anytime Specifications and design are subject to change without notice Page 4 MFI Series For the Installer Allow 6 Clearance for Air Circulation COMM gu
42. nnns Page 26 Removal and Replacement Water Seal eene nennen enne nnn nnns Page 27 Removal and Replacement Evaporator eese nennen nnne nn nns Page 28 Removal and Replacement Gear Motor rrrnnnnnnrnnnnnrrnrnnnrnnnnnrnnnnnennnnnnrnvnnnsnnnnsnnnnnnnennnnnsrnnnnssnnn Page 29 Removal and Replacement Fan Blade and Fan MoOtotl ccccccccseeeeceeeeceeeeeeeeeeeeeeeseeeeseeeesees Page 30 Refrigeration System Service 5 ph enabled a OLE Page 31 MDA Re Page 32 SEM HON Page 36 Page Ii MFI Series Freight Claim Procedure Important Inspect Promptly This merchandise has been carefully inspected and packed in accordance with the carrier s packing specifications Responsibility for safe delivery has been assumed by the carrier If loss or damage occurs you as the consignee must file a claim with the carrier and hold the container for carrier s inspection Visible Loss or Damage Any external evidence of loss or damage must be fully described and noted on your freight bill or express receipt and signed by the carriers agent Claim should be filed on a form available from the carrier Concealed Loss or Damage If loss or damage does not appear until merchandise has been unpacked make a written request for inspection by the carrier within 15 days of the delivery date Then file a claim on a form from the carrier File Claim Without Del
43. ors and pressure controls Switches loads on and off thru relays Reference Photo Below ePotential Relay The compressor start relay eMode ON OFF Switch Manual control for the machine Control Board Water OK Light 8257 t G Power Light Service Light KES EL LE Freeze Light 20 I z X Co PR Bin Full Light LED1 Compressor Relay LED3 Auger Relay Page 11 MFI Series Component Description eEvaporator A refrigerated vertical tube filled with water and containing a water seal and auger eAuger A solid stainless steel double spiral auger it pushes the ice crystals up to the top of the evaporator eWater Seal A two part face seal the top half rotating with the auger the bottom half stationary the sealing action being where the two faces meet elce Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute eBreaker Divider Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin eMotor A split phase motor that drives the gear reducer eThrust Bearings As the ice is pushed up the evaporator the auger is thrust down and pressure from the auger thrust is taken up by this bearing Ice Sweep Bearing Breaker Divider Auger Evaporator 4 HI 31 Tte e m t
44. r stud from top of auger c Unscrew four 4 Allen head cap screws holding breaker to evaporator d Lift up and remove breaker from evaporator e If the auger is stuck use a slide hammer type of puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 10 Inspect the auger the critical areas of the auger are a The auger body It should be clean and shining Sometimes an auger will appear clean when wet but after it is dry it will be seen to be stained Scrub the auger with ice machine cleaner and hot water b The water seal area Because the auger has been removed the water seal will have to be replaced Remove the water seal top half from the auger and inspect the auger for minerals clean as required O NOCIA Breaker and Auger Assembly WARNING The auger has sharp edges handle with care Slide Hammer Puller Thread into the Auger Here L p a e me KS acm Page 26 MFI Series To Remove the Water Seal Assuming all steps to remove the auger have been performed 1 The gear motor evaporator assembly will have to be exposed 2 Remove the four 4 hex head cap screws holding the evaporator to the gear motor assembly Lift the evaporator up and off the gear motor 3 Remove the snap ring or wire retainer from the groove under the water seal 4 Pull or drive out the lower half of the water seal To Replace the Water Seal
45. s been removed from the ice machine Insure the machine is level KR P s 2 m AH ut z aa cz y Note Fasten the ice machine to the bin with the hardware supplied with the ice machine Page 8 MFI Series Start Up Pre Start Inspection 1 Remove the front and side service panels 2 Check that any shipping blocks have been removed 3 Inspect the interior of the ice machine for loose screws or wires 4 Check that no refrigerant lines are rubbing each other 5 Check that the fan blades turn freely Air Cooled 6 Check that the unit is installed correctly according to the final check list on page 8 Start Up 1 Go through the pre start inspection 2 Open the hand valve observe that water enters the water reservoir fills the tube from the water reservoir to the evaporator and then shuts off Water cooled only Turn the water supply ON to the water cooled condenser Check for leaks 3 Switch the master mode switch ON The electrical start up sequence in automatic a There should be a short 15 second delay before the gear motor starts b After the gear motor starts the compressor will start 4 On air cooled models the condenser will begin to discharge warm air on water cooled models the water regulating valve will open and warm water will be discharged into the drain 5 The
46. sion valve outlet b At the suction line at the joint about three 3 inches from the evaporator Remove the evaporator Unsweat the drier from the liquid line After installing a new water seal in the new evaporator see to Replace the Water Seal sweat in the new evaporator at the old tubing connections 6 Install a new drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly To Reassemble the Evaporator and Auger 1 After the gear motor has been inspected fasten the evaporator to the gear motor Torque the bolts to 110 inch pounds 2 Lower the auger into the evaporator barrel slightly turning it to match up with the drive end Do Not Drop the auger into the evaporator 3 Complete the reassembly by reversing the disassembly for the breaker and thrust bearing Breaker Divider Caution Heat sink the TXV body when unsweating or resweating the adjacent tubing Page 28 MFI Series R amp R Gear Motor ni To Check the Gear Motor 1 Remove wires from terminals 1 and 2 2 Use an ohmeter to check for continuity If there is none replace only the motor If there is continuity but the motor will not start check the motors start switch 3 Remove motor end bell or motor stator With ohmeter
47. t and the auger motor stops The compressor will not restart until 2 minutes or more have passed after last shutdown If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart Control Board Protection Devices eWhen the water level in the reservoir falls below the water level sensor s tip the WTR OK light goes out and the machine shuts down When water refills the reservoir the WTR OK light glows and the machine starts up again elf the auger drive motor currents becomes excessive the compressor and auger drive motor will be switched OFF and the Service light will blink The control board will restart the auger drive motor in 4 minutes If during the first 60 seconds after restart the auger motor current stays within limits the compressor is restarted and the machine returns to normal operation If the auger motor s current is excessive within 60 seconds after restart the process will be repeated once more If during that try the current is still excessive the machine shuts down and must be manually reset The Service light will then be glowing continuously To Reset e Switch power to the unit off and then back on Other Protection Devices elf the high pressure control cut out switch opens the machine will stop immediately It will automatically reset when the high pressure falls below its cut in point elf the low pressure control cut out switch opens the machine will stop immediately It
48. ted refrigerant or HFC 134a will work Check with the leak detector manufacturer if in doubt eEvacuate to 300 microns eLiquid charge the system Torque Stem to 6 8 ft Ib Torque caps to 7 12 ft Ibs Access Valves To use the access valves eRemove the cap from the stem use a 3 16 inch Allen wrench to check that the valve is CLOSED Then remove the core cap eClose the valve and replace the caps when done The valve must be closed and the caps tightened Instructions for Liquid Charging R404A In preparation for charging the low side hose should have a sight glass and or a restricting device Such as a Charge Faster installed in it for metering liquid into the low side of the system After a through evacuation shut off the manifold valves and switch off the vacuum pump Place a drum of R404A onto an electronic scale Attach the charging hose to the drum Open the valve on the drum and purge the charging hose Zero out the scale Shut the low side access valve at the ice machine Open the discharge manifold valve full open Low Side High Side Watch the scale when the correct charge is shown shut the manifold valve Note If all of the charge will not go in the discharge side a Shut the discharge access valve at the ice machine b Switch the machine on c Open the low side access valve at the ice machine d Open the low side manifold valve and observe the sight glass to be certain
49. tor A vertical stainless steel tube refrigerated and water filled Utilizes a stainless steel auger eCompressor The refrigerant vapor pump eWater Reservoir Float operated it maintains the water level in the evaporator at a constant level and it also contains the water level sensor eWater Level Sensor Senses if there is water in the reservoir to make ice out of Will shut the ice machine off if there is no water in the reservoir elce Discharge Chute Directs the ice produced by the evaporator into the storage bin elce Level Sensor An electronic eye it senses the presence of ice in the bottom of the discharge chute eGear Motor An oil filled soeed reduction gearbox driving the auger eDrain Tube When uncapped and lowered drains the evaporator eCondenser Air or water cooled where the heat removed in ice making is discharged eExpansion Valve The refrigerant metering device Air Cooled Model Shown Control Box Expansion Valve ater Reservoir i HANE cej High d Pressure Cut Out ce Drain Tube AAR EGG UMS Mir FINI oy a Al Gear Motor Ice Discharge Chute Ice Level Sensor MFI Series Component Description eContactor definite purpose contactor connecting the compressor and the fan motor to the power supply eCircuit Board Controls the operation of the ice machine using input from the sens
50. unit should soon be making ice if desired the low side pressure may be checked it should be 32 psig 2 psig The suction line temperature at the compressor Is normally very cold nearly to the point of frost up to the compressor body but not on it The air cooled discharge pressure will depend upon air and water temperatures but should be between 200 psig and 280 psig The water cooled discharge pressure should be a constant at about 245 psig Note The above pressures are for new clean machines You can expect to see some values higher and some lower between different units There are no adjustments to make so replace the panels Clean and or sanitize the storage bin interior wipe off the exterior with a clean damp cloth Give the owner user the service manual instruct him her in the operation of the unit and make sure they know who to call for service 9 Fill out the manufacturer s registration and mail it to Ice O Matic 21 9 Page 9 MFI Series Component Description eControl Box Contains the electrical controls that operate the machine eHigh Pressure Cut Out Switch An auto reset switch sensing the high side refrigeration pressure It will shut the machine off if the discharge pressure exceeds 450 psig eLow Pressure Cut Out Switch An auto reset switch sensing the low side refrigeration pressure It will disconnect power to the circuit board and shut down the machine if the low pressure falls too low eEvapora
51. will automatically reset when the pressure rises above its cut in point e The mode ON OFF switch is the manual control for the complete machine but it is not a service disconnect Page 13 MFI Series Operation Water Water enters the machine through the 3 8 inch male flare at the rear of the cabinet goes to the water reservoir which it enters through the float valve The water then goes out the bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain Water cooled models have a separate water circuit for the cooling water The water enters at the rear goes to the water regulating valve then to the water cooled condenser and down the drain Water System Water Inlet Reservoir m Water Level pup ZZ z RSS aa FZ j 4 5 te un Dein ICE fe MAR ke eT s E rue preda 1 m LE erm dbi mas uk k PA aa Tai af bm a merui e Ea Tm mc VEE nbn rp AA td tie ak n 1 j fr MN E m uL dr Pl Tai 4 1 S S a 7 M F p PE lh FA e de Pct EE p 175 ha ru 5 gat Ty E Ve LER A elger ERE LE s m 3 1 rt ji a v 3 sut es iT L dd A en Hi LO uua Mea PT da petraa des i Fv ll jj iw pr n ro dw T X qo POT 4 4 l BL TE Epor ee Fal DTE P ads
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