Scotsman FM1202, Service Manual

Page 1: ...efrigerant This manual covers both the A and the B models as designated by the last letter in the model number This manual was printed on recycled paper TABLE OF CONTENTS Installation For the Installer Specifications 2 Location 3 Two units on one bin 4 For the Plumber 5 For the Electrician 6 Final Check List 7 Start Up 8 Component Description 9 Electrical Sequence 12 Operation 13 Maintenance and C...

Page 2: ...f the limitations is misuse and can void the warranty Model Number FM1202AE 3A FM1202WE 3A FM1202AE 32A FM1202WE 32A Dimensions w o bin W x D x H 21 x 24 x 27 same same same Basic Electrical 208 230 60 3 same 208 230 60 1 same Ice Type FLAKE same same same Condenser Type Air Water Air Water The normal finish for the ice machine is enamel sandalwood A stainless steel panel kit SPKFM21 may be field ...

Page 3: ...locations Be sure that the location for the machine is within the environmental limitations Storage Bin Tip the storage bin on its back using parts of the carton to protect the exterior finish 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 remove paper covering the bin gask...

Page 4: ...FOR THE INSTALLER Location TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE S FM1202 August 1993 Page 4 ...

Page 5: ...he cabinet The water pressure to all lines must always be above 20 psig and below 80 psig Drains Air Cooled Models There is one 3 4 FPT drain at the back of the cabinet the drain line is of the gravity type and 1 4 inch per foot fall is an acceptable pitch for the drain tubing There should be a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped and vented...

Page 6: ... machine requires a solid chassis to earth ground wire The ice maker should be connected to its own electrical circuit so it would be individually fused Voltage variation must remain within design limitations even under starting conditions All external wiring must conform to national state and local electrical codes The use of a licensed electrician is required to perform the electrical installati...

Page 7: ...plate requirements 3 Have all the plumbing connections been made and checked for leaks 4 Has the machine and bin been leveled 5 Is there a minimum of 6 clearance at the back of the machine for proper service access and air circulation 6 Is the water pressure a minimum of 20 psig 7 Has the machine been secured to the bin 8 Is there clearance over the top of the machine for service access 9 Is there...

Page 8: ... valve will open and warm water will be discharged into the drain 5 The unit should soon be making ice if desired the low side pressure may be checked it should be 25 psig or 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 bu...

Page 9: ...t of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice in the bottom of the ice discharge chute Operates to turn the ice machine on and off automatically as the level of ice in the bin changes Gear Motor An oil filled speed reduction gearbox driving the auge...

Page 10: ...in A thermistor to check the water level in the reservoir Amp draw of the gear motor The loads include Compressor contactor Fan motor Auger drive motor Transformer A Models Only Supplies low voltage to the circuit board Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops below a preset point 0 4 psig Potential Relay The compressor star...

Page 11: ...here the two seal faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Divider Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin Motor A split phase motor that drives the gear reducer Thrust Bearing As the ice is pushed up the evaporator the auger is thrust down and pr...

Page 12: ...consists of The compressor relay opens The compressor contactor opens The compressor stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evaporator and then The auger motor relay opens and the auger motor stops If the ice level sensor is clear bin empty for more than 15 seconds the machine will start up again Another purpose of the circuit board is to turn ...

Page 13: ...he 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 it enters the fitting at the rear goes to the water regulating valve then to the water cooled condenser and down the drain ADJUSTMENT OF WATER LEVEL SPOUT SWITCH EVAPORATOR DRAIN WATER LEVEL EVAPORATOR ICE CHUTE DRAIN STRAINER WATE...

Page 14: ...pon the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less 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 the water inside it After the evaporator the refrigerant now a low pressure ...

Page 15: ...e cleaning solution Mix eight ounces of Scotsman Ice Machine Cleaner with three quarts of hot water The water should be between 90 115 degrees F 8 Slowly pour the cleaning solution into the water reservoir until it is full Wait 15 minutes then switch the master switch to ON 9 As the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain a full reservoir...

Page 16: ...st two times per year A Check the bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover unscrewing the auger stud Inspect the assembly looking for wear See Removal and Replacement to replace bearing or seals Reverse to reassemble 4 Check and tighten all bolts and screws CLEAN THE WATER LEVEL PROBE PULL UP TO REMOVE PROBE RESERVOIR CAU...

Page 17: ...e condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with a flash light from the front to see if light can be seen though the condenser fins Reverse to reassemble MAINTENANCE Air Cooled 1 REMOVE TOP PANEL 2 REMOVE TWO SCREWS UNPLUG FAN MOTORS 3 PULL FAN MOTOR ASSEMBLY UP AND OUT 4 CLEAN CONDENSER FINS TO GAIN ACCESS TO CONDENSER SURFACE Elect...

Page 18: ...off electrical power and turn off the water supply 1 To remove the auger remove the front and top panels 2 Remove 3 hex studs holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4 Loosen band clamp under ice chute and remove ice chute from evaporator 5 Remove 4 allen screws holding breaker to evaporator 6 Drain the evaporator by lowering and uncapping the evaporato...

Page 19: ... it Replace the drier recover evacuate and weigh in the nameplate charge E Check the high pressure cut out if closed go to F if open check 1 The pressure control opens at 400 psig Check the high side pressure reset the control and observe on water cooled that water soon begins to flow from the condenser drain or on air cooled that the fan is forcing air through the condenser If the unit trips out ...

Page 20: ...n full light on the tester should be ON if not replace the circuit board If the bin full light on the tester is ON move the tester switch to bin empty the light on the tester should go OFF and the bin empty light on the circuit board should go ON If not replace the circuit board If it does as above and the machine still does not run replace the ice level sensors 3 If the transformer is fine and th...

Page 21: ...oil is open replace the contactor 3 Check the auger drive motor centrifugal switch If when the drive motor is running contact 4 black wire removed has no power and all of the above switches have been checked replace the centrifugal switch or the drive motor 4 If the compressor relay on the circuit board has power on the NO contact but not on the COM contact replace the circuit board B Check the co...

Page 22: ...r leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 25 psig If low assume a refrigerant leak locate repair and recharge If no leak the TXV may be restricted defective or not adjusted properly If needed replace the TXV recover evacuate and recharge per nameplate 4 Check the insulation on the evaporator It should be dry with no wet spots or frost If th...

Page 23: ...ce maker 8 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the chute in front of and behind it are two plastic bin control mounts 5 Slide each bin control to the left and in the control box disconnect the electrical leads connecting the bin control to the circuit board 6 Reverse to ...

Page 24: ...mage 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 Replace parts as required Re grease bearing with Scotsman part no 19 0609 01 bearing grease Replace top seal and check t...

Page 25: ...er from evaporator e If the auger is stuck use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 Inspect the auger the critical areas of the auger are 1 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...

Page 26: ...wn 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 or Scotsman part number 19 0529 01 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...

Page 27: ...r 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 gearmotor has been inspected fasten the evaporator to the gear motor Torque the bolts to 110 inch pounds 2 Lower the auger into the e...

Page 28: ...emove top panel 2 Unplug the two fan motor wire leads from the fan motors 3 Remove the two hex head bolts from the top end of the fan motor assembly 4 Lift up and pull out the fan motor assembly 5 Repair as needed 6 To reassemble Place the fan motor assembly lower flange holes over the two allen head cap screws in the base and reinstall the hex head bolts at the top of the assembly Plug the fan mo...

Page 29: ...d by heat sink material Specifically Recover reclaim or recycle refrigerant Although the method chosen is up to the service company Scotsman recommends reclaim There are various mechanical devices that may be used to recycle refrigerant at the field level however Scotsman requires that any refrigerant placed into a Scotsman ice machine meet ARI spec 700 88 Reclaim programs are available thru most ...

Page 30: ...the ice level sensors are properly aligned clean and not obstructed use the tester as follows Bin Control Note All testing is done with the electrical power on the master switch on and all reset switches reset 1 Unplug photo trans and LED connectors from the circuit board 2 Plug photo trans and LED connectors from the tester into the circuit board a Move the bin full switch on the tester to Full T...

Page 31: ...not replace the circuit board b Move the water switch on the tester to the Water position The No Water light on the board should go OFF If not replace the circuit board If the light does go off replace the water level sensor If the Bin Empty light is ON wait 10 20 seconds for the machine to start The machine should start LIGHT ON WATER SENS SWITCH TO NO WATER CIRCUIT BOARD TESTING LIGHT OFF SWITCH...