Automatic Undercounter Ice Maker
Contents
1. Remove the rear locate the evaporator add low side access valve open the process suction weld open the two welds replace a new one Recover refrigerant evacuate and weigh in the nameplate charge Reverse the above step to reassemble2. Remove the rear cover front panel Locate the Electronic controller Pull out the sensors of temperature one at the evaporator another at the condenser loosen the screws of rooting the Electronic controller replace a new one Reverse the above step to replace If you need replace the fuse open the front panel of the control box you will find the figure VVVV Vv ee According the figure take out the fuse replace a new one Lnge warua cniveus ay Reverse the above step to reassemble bCB g 6 gt If you need replace the sensors of temperature pull out the sensor of temperature open the panel of the controller box pull out the other side replace a new one Reverse the above step to reassemble ADVICE Expert advises the cube size have been adjusted ok before leave factory had better not adjust it Replace the water system components Please see the water system drawing The water leakage should be checked after this kind of operation NOTICE Before replace the water system components it will be necessary to drain the system of water 1 Replace the water pump gt Disconnect electrical power gt Remove the rear cover gt Unplug the lines connector with the water pump the water outlet tube of pump and the water gt gt inlet tube of pump Loosen the screws replace a new one Reverse the above step to reassemble Replace the cooling sys
3. controller Add low side access valve locate leak recover refrigerant Renie Refrigerant leaks replace drier evacuate and weigh in the data plate charge t completely Add low side access valve recover refrigerant replace hot The Capillary Capillary tube is blocked gas valve replace l drier evacuate and weigh in the compresso tube nameplate charge r run Vent The vent is obstructed Clean the vent but no ice around the ice machine Hot gas Hot gas valve damaged Replace valve The The model of making ice Replace the Electronic Electronic doesn t turn to harvest controller ee Tthe unit is working in Work in normal mode the cold preservation stage mode controlled 2 Low production Problem Check part Possible Cause Probable Correction kinds or point Refrigerant Refrigerant leaks Recharge Cooling partially System Condenser The condenser may be Clean the condenser dirty The ambient The ambient Check the ambient and air flow temperature temperature is high or too low Fan The fan is dirty or Clean or repalce damaged Hot gas valve Hot gas valve Replace the hot gas valve performance poor leads to few ice is produced Electronic The setting See the service manual adjust controller temperature of the size of ice cubes Electronic controller is low Sensor The sensor of Replace the sensor of temperature damages te
4. feeling hot gt Touch the capillary tube the drier nearby feeling tepefaction VVVV WV Troubleshooting Guide This troubleshooting guide in the user manual should be read before this guide Be sure only when the trouble shooting in user manual can t help you solve the problem turn to this guide Troubleshooting Guide The machine does not make ice Proble Check Possible Cause Probable Correction m part or kinds point Plug The icemaker is Plug the icemaker in unplugged Socket Socket is damaged Check and replace Power The icemaker power Turn the icemaker power switch switch switch turns to OFF to ICE Fuse The fuse is blown Replace fuse The Wiring Some wiring connection Check and re connect machin connection is incorrect or loosed e don t Voltage The voltage of the power Add manostat operate supply is low Ice full The ice full probe is out Replace a new one probe of function Ice full The ice full probe is Clear the probe and make the probe covered by something ice full probe is free wiring Some wiring is damaged Replace a new one Electric Some electric component Find the controller press the component fail mode button to change the mode It is helpful to judge which part is out of function Controller The controller fail Replace a new one Water The water supply tap is Turn on the water supply tap supply tap turn off Water The wate
5. Automatic Ice Maker Service Manual MIM 50 MIMS50 O Table of contents How the Icemaker works 3 10 Cooling System 3 Water System 4 5 Wiring Connections and Controller 6 8 Exploding Drawing 9 10 TroubleShooting 0 11 17 Before Maintenance 11 Basic Checking 11 TroubleshootingGuide 12 17 Adjustment and Replacement 18 19 Replace the controller 18 Replace the water pump 18 Replace the compressor 19 Replace the fan motor and fan blade 19 Replace the hot gas valve drier and evaporator 19 IMPORTANT The service manual is based on the user manual Before servicing p
6. cription 1 Electrify Status For The First Time As the icemaker is properly installed switch on the water tap let the water trough full reach on the level then turn the ICE OFF WASH switch to the ICE position on the front panel The icemaker will start working automatically In this status the time is fixed about 3 minutes This function is also helpful to protect the compressor avoiding restart within 3 minutes At this status the Red Green Yellow LEDs are light together 2 Ice making Status The compressor motor fan and pump are powered on The hot gas solenoid valve is powered off When this green LED is lit the unit is working in the ice making mode controlled by a temperature probe on the evaporator When the green LED is flashing the unit is working in the ice making mode controlled by a fixed timer The fan motor is also controlled by a condenser sensor When the ambient temperature is too lower the motor fan stop working for good condensation to refrigerant 3 Ice Harvest Status The pump is powered off The hot gas solenoid valve compressor and motor fan is powered on The fan motor is also controlled by a condenser sensor When the ambient temperature is too lower the motor fan stop working for good condensation to refrigerant The Yellow LED indicates the ice harvest status 4 Ice Full Status And Cold Preservation Stage If the ice bin is fulfilled with ice or the full sensor is covered the machine stops making ic
7. e and turn to cold preservation stage automatically In this status the compressor works regularly to keep the lower temperature for lower ice melting The rest of the electric components are powered off The RED LED indicates the ice full status and the GREEN AND YELLOW LED together indicates the cold preservation status Controller box Instructions for LEDs and buttons 1 Red LED Ice full indicator light When this LED is lit the ice storage bin is full of ice or there is something between the ice full sensor in the ice storage bin The unit will stop making ice When ice cubes are taken out of the ice storage bin making the ice full probe free the red LED will keep flashing for 3 minutes Then the unit will restart and return to the ice making mode 2 Green LED Ice making indicator light When this LED is lit the unit is working in the ice making mode controlled by a temperature probe on the evaporator When the green LED is flashing the unit is working in the ice making mode controlled by a fixed timer 3 Yellow LED Ice harvest indicator light When this LED is lit the unit is working in the ice harvest mode controlled by ice full probe When green LED and yellow LED is lit it means the unit is working in the cold preservation stage 4 Mode button Mainly for service When this button is pressed it can change from ice making mode to ice harvest mode or from ice harvest mode to ice making mode You can judge the mode
8. from the status of the green and yellow LEDs Ice Size Adjustment Guide 1 Press and hold the Clean button and the Mode button together for at least 3 seconds The unit will enter the Ice Size Adjustment mode The HARVEST LED yellow will be blinking continuously during the ice size adjustment 2 While in the Ice Size Adjustment mode press the Clean button or the Mode button for the desired ice size Smaller ice setting By pressing the Clean button you can decrease the size of the ice cubes The ICE LED green will flash as you lower the ice size and will finally be blinking at the setting of smallest ice size Larger ice setting By pressing the Mode button you can increase the size of the ice cubes The BIN FULL LED red will flash as the larger size is set and will blink when the setting of largest ice size has been reached After 10 seconds without any operation the unit will return to the previous mode NOTE During the ice size adjustment the BIN FULL ICE and HARVEST LEDS blinking all at once indicate that the unit is in the default factory setting of the ice size MAJOR FUNCTIONS 1 The operating procedure is completely automatic 2 When the ice storage bin is full of ice cubes the machine stops making ice and proceeds to the cold preservation stage automatically It starts making ice again after ice cubes are removed 3 The different color
9. lease read user manual and service manual carefully The service operation should be implemented by qualified technician 3 o O EERS Si 52a na ern ae nage 3s Os g ie 0 Sg O 5O f MnO gg Pa O 00 NO Lo DOE Wo J ON TS we ae UY How the Icemaker Works Please refer to the section Operation of user manual from page 13 to 16 It describes clear how the icemaker makes ice and uses the water There are 3 systems including Cooling System Water System and Wiring Connection and Controller Cooling System NUMBER DESCRIPTION gt Ao ao ay Og z225 Vom DE4ss AO S06 WHS ote a ZGEOES Ss LAV Oe ANN THN 9 2 Fan blade 39 1 Temperature sensor of the condenser 10 Discharge tube 39 2 Temperature sensor of the evaporator 19 Wiring harness 46 Evaporator Ice Mold 39 Controllerbox During the ice making stage the hot gas solenoid valve is closed The hot refrigerant gas is pumped out off compressor to condenser The hot gas is cooled by fan forced air to warm liquid refrigerant after passing through the condenser The drier amp filter reduces the possible dirty and humidity in the refrigerant The evaporator is cooled by the refrigerant So ice can formed on the evaporator during water is sprayed to the evaporator Low pressure refrigerant gas may go back compressor from the evaporator During the ice harvest stage the solenoid valve is open The ho
10. lity is too installed in front of the water frequently high inlet inside the machine i Spring of the meee ane Replace the compressor internal drops compressor Noise Water pump The noise of the water Replace the water pump during pump operation Pipeline Pipeline system Clear pipeline system isbig system resonate Feet The feet are not Level and lock the feet leveled The fan motor loose Relocate the fan motor Fani tor the clearance of the replace rotor is bigger the fan blade turns back Problem Check part Possible Cause Probable Correction kinds or point A few water drops to Normal condensation on the Tue operatu the floor when you door or some water together open the door to take with ice Take care when you Water is out ice from ice take out ice leaking out storage bin the unit Water supply Water supply Tighten fitting connection connection leaking Drainage tray Water full probe is out Replace the new one on top of the of function compressor Water line Some water line leaks Plug into again Lines of the The lines of the water Plug into again water pump pump loose Water pump Water pump damages Replace water pump The water Water The water distribution Clean the water distribution distributio distribution tube blocks tube istributio tube n tube Ice full probe m A ee pebes a Repair or replace the probe doesn t back no
11. mperature Water The water distribution Clean the water distribution ee tube blocks t be distribution tube Water The water quality is Using a filter apparatus System Water line too poor The water installed in front of the water line blocks inlet valve Th e silica tek tubes Make the silica gel tubes resile Silica gel distort lead to block tubes The floater valve TAR leaks Lead to few ice Ropar pr eplage produced Wheel The icemaker is not See installation proper leveled 3 Ice Cube is not OK Problem Check part Possible Cause Probable Correction kinds or point Condenser The condenser is dirty Clean the condenser Leave or the air grills are covered space around the machine The ambient The ambient Adjust the ambient Cubes are temperature temperature is too temperature high too small Electronic The setting See the service manual adjust controller temperature is high the size of ice cubes Refrigerant Refrigerant leaks Recharge Electronic The setting See the service manual adjust controller temperature of the size of ice cubes Electronic controller is low Cubes are Sensor Temperature sensor of Replace the sensor of too big the evaporator temperature damages The ambient The ambient Adjust the temperature aad water temperature and water temperature is too low temperature The water quality is Using a water soften filter Water q
12. r supply pipe Reconnect the water supply pipe supply is not proper connected or pipe maybe kinked Some water line leaks Plug into again The water line blocks oe al iv i 2 mee her aoe cleaning Water Water line Water supply pressure is Adjust the water supply pressure System lower within the range of stated range Water inlet Water inlet blocks Check and clear it Water pump damages Replace water pump ne ae eee an oe Make the temperature returns Water waler ump 8 stop within the stated range pump automatically The lines of the water pump loose Plug into again The housing of water ump leaks Replace water pump Drainage Drainage tray on top of Drain off water by unscrewing tray on top the compressor is full lower drainage nut of the compressor Problem Check Possible Cause Probable Correction kinds part or point Wiring loose Plug tightly or replace connects The start Be damaged Replace the start relay thermal relay ther protect of the compressor The mal compresso protect r doesn t The Be turnoff Replace the compressor start or startup The motor of the Replace the compressor start coil compressor is short circuit frequency running coil Condenser The condenser may be Clean the condenser dirty Fan The fan may be dirty or Clean or Replace the fan damaged The The controller is damaged Replace the Electronic Electronic controller
13. rage bin 63 1811306015 Drain pipe Troubleshooting WARNING ELECTRICAL SHOCK HAZARD Disconnect Electrical Power Before Beginning Removal of Parts Before Maintenance 1 Check out the user if the user uses a 115 VAC 60Hz only 15ampere electrical supply and have properly grounded ensure the maintainer against electrical shock 2 Check out the leads loose Turn off Short circuit If have such problems foreclose in turn Basic Checking The icemaker has some trouble through the appearance phenomena judges So the service technician must check it thoroughly then maintain Hearing gt Hearing the user s depiction about the icemaker at using process and the phenomena Try to understand what is the defect and how did the user operate the icemaker before calling for service gt Ifthe running sound is normal Looking gt Check the pipe of cooling system especially the welding point If there is some oil the gas is leak out so that no ice making or less ice produced If the cycle of the ice making and harvest is normal Check the water system especially the connection If there is some water leakage Check if the water filter needs to be replaced Check if the icemaker installed according to the user manual Check if the icemaker needs to be cleaned Touching gt Touch the hot gas pipe with the evaporation weld feeling the temperature At the ice making stage feeling cool At the ice harvest stage
14. rmal position spray The room Tho Toon tere ae Make the temperature returns temperature the water pump top within the stated range Hot gas valve The hot gas valve is Replace the hot gas valve poor The hot gas valve Replace the hot gas valve damage Ice mold of The ice mold is Clean the ice mold or replace Harvesting the dirty or polishing the evaporator ice is evaporator degree is poor difficult Refrigerant Refrigerant leaks Recharge Ice machine Ice machine is not Level the ice machine proper leveled The ambient The ambient and Adjust the temperature and water water temperature is temperature too low Ice cubes size The size is too big See the adjust of ice cube size The lines of the hot Plug into again gas valve loose Th Hot gas valve Hot gas valve Replace the coil of hot gas e performance poor or valve if only because of the evaporator break coil is hot more Refrigerant Refrigerant leaks Recharge than 4 Electric The electric controller Check the controller minutes controller is wrong The The drainage tray on Drain off water by unscrewing icemaker The drainage top of the compressor lower the drainage nut make an tray on top of is full alarm the sound compressor regularly Adjustment and Replacement Replace Controller fuse and the sensor of temperature WARNING Disconnect Electrical Power Before 2 ELECTRICAL SHOCK HAZARD s eG Beginning Removal of Parts
15. s of the LED display indicate various work modes 4 The fan motor responds to the ambient temperature If it is cold the motor will stop working to keep the cooling system in good working condition 5 A sensitive probe and accurate timer enhance the performance of the ice maker 6 Acompressor protection system is built in Exploding Drawing mommy monn Amo M pi M Item No Part Number Description 1 1885000202 Condenser 3 1854703321 Hot gas valve coil Zhongbao 3 1 1854703310 Hot gas valve body Zhongbao 4 1880007500 Drier 8 1858421900 Compressor 8 1 1858460900 Starting ralay 8 2 1858451100 Protector 9 1858200601 Fan motor 9 2 549738100 Fan blade p 200X28 14 1880014701 Left foot 15 1880014801 Right foot 19 1853703503 Wiring harness 20 1853113800 Power cord 23 1858900600 Water pump 30 1845744001 Louver 32 1880001701 Floater valve 33 1864526301 Water inlet 34 1864529100 Nut of the water inlet tube 38 1811306020 Water supply pipe 39 1854205801 Control box 39 1 1851700401 Temperature sensor of condenser 39 2 1851700501 Temperature sensor of evaporator 39 3 1854800500 Fuse 43 1864400101 Top hinge cover 44 1864800100 Ice scoop 45 1880001601 Water distribution tube 46 1880017702 Evaporator Ice Mold 48 1861701601 Ice slideway 49 1854005700 Ice full senser 55 1864805201 Ice sto
16. t refrigerant gas is pumped out off compressor to evaporator through hot gas valve As the hot gas is not cooled by the condenser the refrigerant makes the evaporator ice mold warm So some ice touching the evaporator is thawed All of ice can slide down to the ice storage bin Water System When the water supply pipe is connected with the main water supply water will fill the water trough through the floater valve till enough water inside water trough makes floater valve close During ice making stage water is pumped from the water trough to the water distribution tube The distributed water flow the surface of evaporator Most parts of water go back water trough Some water is frozen on the evaporator step by step The floater valve will open and fresh water is recruited at any moment NUMBER DESCRIPTION 23 26 33 36 45 48 57 Water pump Water pump outlet tube Water inlet Water inlet tube Water distribution tube Ice_ slideway Water trough NUMBER DESCRIPTION Water pump inlet tube Floater valve Nut of water inlet tube Water supply pipe Evaporator Ice full probe Water trough drain tub Wiring Connection VOU Lo Circuit Des
17. tem components Replace the condensing components See Figure cooling system 1 Replace the compressor and the compressor kit includes relay thermal protect 44 gt If only need replace the compressor kit remove the rear locate the compressor take the clip open the cover replace the wrong Reverse the above step to reassemble If need replace the compressor remove the rear cover and cabinet locate the compressor Unplug the lines and taken out the earth line add low side access valve open the Process Suction evacuate refrigerant take out the compressor replace a new one joint together then recover refrigerant weigh in the nameplate charge Reverse the above step to reassemble 2 Replace the fan motor and fan blade gt gt gt gt Remove the front panel rear and cabinet locate the fan motor unplug the lines connecting with the fan motor loosen the screws of holding fan motor bracket Replace a new one If only need replace the fan blade loosen the screws holding the fan blade taken out the damaged replace a new one Reverse the above step to reassemble 3 Replace the hot gas valve drier and evaporator gt gt gt Remove the rear cover Locate the drier and hot gas valve add low side access valve recover refrigerant replace the drier and hot gas valve evacuate and weigh in the nameplate charge Reverse the above step to reassemble If need replace the evaporator
18. uality poor apparatus installed in front of The cub the water inlet valve e cubes aie Pvaporgtor Ice machine is dirty Clean and sanitize the ice partially a machine The water distribution Clean the water distribution formed h Water tube blocks partially tub ave ragged distribution upe sides tube The room The room temperature Make the temperature returns temperature is out the stated range within the stated range the water pump stop i Water filtration Replace the filter The ice Filter element needs to be cubes shape changed deformity Water trough Water trough level is Adjust the water floater too low The room The room temperature Make the temperature returns Cubes are temperature is out the stated range within the stated range the water pump stop partially automatically formed a re white at Water trough Water trough level is Adjust the water floater the bottom too low 4 Other problems Problem Check part Possible Cause Probable Correction kinds or point Earth line The earth line isn t in Please use the socket meeting The body the socket the standard is Lines The lines are Adjust reconnect replace lines electrified creepage Electric The electric Replace this electric component component is component creepage Scales the water The rigidity of the Using a water soften apparatus occur quality water qua
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