Scotsman FM1200 Service Manual Download

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INTRODUCTION

To the owner or user: The service manual you
are reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.

The FM1200 is a modular ice system that fits
a variety of Scotsman ice storage bins.
It features: front service for the freezer,
gearmotor, control box, water reservoir, and
bin control; an electronic circuit for monitoring
ice and water level; a thermostatic expansion
valve; and R-502 as the refrigerant.

TABLE OF CONTENTS

Installation

For the Installer

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Two units on one bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Start Up

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Service Diagnosis

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Removal and Replacement

Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Water Seal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Evaporator

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.

FM1200

October, 1991

Page 1

Summary of Contents for FM1200

Page 1: ... ice and water level a thermostatic expansion valve and R 502 as the refrigerant TABLE OF CONTENTS Installation For the Installer Specifications 2 Location 4 Two units on one bin 5 For the Plumber 6 For the Electrician 7 Final Check List 8 Start Up 9 Component Description 10 Electrical Sequence 13 Operation 14 Maintenance and Cleaning 16 Service Diagnosis 20 Removal and Replacement Reservoir and B...

Page 2: ...mber FM1200AE 3A FM1200WE 3A FM1200AE 32A FM1200WE 32A Dimensions w o bin H X W X D 27 x 21 x 24 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 Minimum Circuit Ampacity 13 4 12 9 14 6 14 Max Fuse Size 20 20 20 20 Comp H P 1 5 1 5 1 5 1 5 The normal finish for the ice machine is enamel sandalwood A stainless steel...

Page 3: ...nce They meet or exceed the standards of UL NSF and CSA Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way including the use of any part and or other components not specifically approved by Scotsman Scotsman reserves the right to make design changes and or improvements at any time Specifications and design are subject...

Page 4: ... the leg levelers all the way in preparation for leveling later Return the bin to the upright position remove paper covering the bin gasket Note Do not push bin into position but lift it there Pushing a bin especially one with ice in it can cause damage to the legs and the leg mounts Install the appropriate bin top on the bin according to the instructions for the bin top Ice Maker The machine is h...

Page 5: ...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 FM1200 October 1991 Page 5 ...

Page 6: ...e cabinet The water pressure to all lines must always be above 20 psig and below 120 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 7: ... 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 8: ...late 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 9: ...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 can be checked it should be 30 psig or 4 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...

Page 10: ...l it also contains the water level sensor Water Level Sensor Senses if there is water in the reservoir to make ice out 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 a...

Page 11: ...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 start relay On Off Switch Manual control for the machine Prior models A manual reset switch was part of circuit board Lights up when unit shuts off from ice discharge chute being overfilled o...

Page 12: ... 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 permanent split capacitor motor that drives the gear reducer Thrust Bearing As the ice is pushed up the evaporator the auger is thrust down ...

Page 13: ...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 the machine off if there is not enough water in the machine When the water level in the reservoir falls below the water level sensor the machine will shut down When the water refills the reservoir the machine will start up again Separ...

Page 14: ...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 15: ... upon 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 pressur...

Page 16: ...osphoric and Hydroxyacetic acids These compounds are corrosive and may cause burns 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 7 Prepare the cleaning solution Mix eight ounces of Scotsman Ice Machine Cleaner with three quarts of hot water The water should be between...

Page 17: ... buildup 3 The bearing in the breaker should also be checked at least two times per year A Check the bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed using a spanner wrench and 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 ...

Page 18: ...nnect electrical power and remove the filter The filter may be cleaned or replaced B Clean the 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 Step 3 Pull fans bracket up and off locating pins Step 1 Remove t...

Page 19: ...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 20: ...k the high pressure cut out if closed go to F if open check 1 The pressure control opens at 450 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 on pressures below 450 psig replace the control If the pressures rise above the...

Page 21: ...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 22: ...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 23: ...ter leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 30 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 evacuate and recharge per nameplate 4 Check the insulation on the evaporator It should be dry with no wet spots or frost If the insu...

Page 24: ...emaker 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 re...

Page 25: ...ker to evaporator d Lift up and remove breaker bearing assembly from auger evaporator 6 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...

Page 26: ... of auger c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up remove breaker 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 afte...

Page 27: ...n 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 28: ... 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 See To Reassemble Evaporator and Auger To Reassemble the Evaporator and Auger 1 After the gearmotor has been inspected fasten the evaporator to the gear motor be sure that the number of shims indicated on the gear case cover is in place betwee...

Page 29: ... are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too high carefully inspect the bearings and gears If in doubt about the condition of a part replace it The oil quantity is 14 fluid ounces do not overfill Note The gears and bearings are available only as pressed together sets D After replacing p...

Page 30: ...that 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 F...

Page 31: ...ot 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 ...

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