Scotsman FME1504 Page 10 User Manual Download | Manualshive

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Control Box

Contactor:

A definite purpose contactor

connecting the compressor to the power supply.

Circuit Board:

Controlling the ice machine

through sensors and relays. The sensors are for

ice level and water level. The relays are for the

gear motor (with a built in time delay to clear the

evaporator of ice when the unit turns off) and for

the compressor.

Potential Relay

: The compressor start relay.

On/Off Switch:

Manual control for the machine.

NME1254 & FME1504

June 2002

Page 10

Power Light

Service Light

Water OK Light

Bin Full

Light

Freeze Light

Compressor

Relay

LED1

Auger

Relay

Control Board

LED3

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Summary of Contents for FME1504

Page 1: ...k List Page 7 START UP Page 8 COMPONENT DESCRIPTION Page 9 Control Box Page 10 ELECTRICAL SEQUENCE Page 11 COMPONENT DESCRIPTION Page 12 OPERATION Page 13 OPERATION Refrigeration Page 14 CLEANING SANITIZING Page 15 SENSOR and CONDENSER MAINTENANCE Page 16 BEARING MAINTENANCE Page 17 AUGER MAINTENANCE Page 18 SERVICE DIAGNOSIS Page 19 SERVICE DIAGNOSIS Page 20 CONTROL SYSTEM DIAGNOSTICS Page 21 REM...

Page 2: ... beverage dispensers use KBT44 and KDIL N 250 Lancer special for nugget Ice Beverage Dispenser use KDIL N L Lancer kit 82 3491 NME1254 FME1504 January 2005 Page 2 ICE MACHINE SPECIFICATIONS Model Number Cabinet Dimensions W x D x H Basic Electrical Condenser Type Ice Type Refrigerant Charge R 404A Minimum Circuit Ampacity Maximum Fuse Size FME1504AS 32B 30 x 24 x 27 208 230 60 1 Air Cooled Flake 3...

Page 3: ...r smaller The finer the filter the better but finer filters will clog sooner than course ones It may be necessary to add a course filter ahead of the fine filter to prolong filter life 2 Check with a water treatment specialist for a water test and recommendations regarding filters and treatment Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance Th...

Page 4: ...he 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 gasket Install bin top if required Note Do not push bin into position instead lift it there Pushing a bin especially one with ice in it can cause damage to the legs and the leg mounts Ice Machine The machine is heavy so the use of a mechanica...

Page 5: ...of the cabinet It is a gravity drain 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 floor drain Water Cooled Models In addition to the above mentioned drain a separate condenser drain must be installed Connect it to the 1 2 condenser drain connection at...

Page 6: ...equires a solid chassis to earth ground wire Connect the ice machine to its own electrical circuit so it is 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 installation NME1254 FME1504 June 20...

Page 7: ...en made and checked for leaks 4 Has the machine and bin been leveled 5 Is there a minimum of 6 clearance at the rear left and right 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 a water shut off valve installed near the machine 9 Have the shipping blocks been removed from under the gear...

Page 8: ...models the water regulating 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 between 30 and 32 psig Low side pressure may be lower than 30 PSIG when the ambient is under 70o F and higher than 32 when ambient is over 90o F The suction line temperature at the compressor is normally very ...

Page 9: ...ake ice out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice made 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 th...

Page 10: ...and water level The relays are for the gear motor with a built in time delay to clear the evaporator of ice when the unit turns off and for the compressor Potential Relay The compressor start relay On Off Switch Manual control for the machine NME1254 FME1504 June 2002 Page 10 Power Light Service Light Water OK Light Bin Full Light Freeze Light Compressor Relay LED1 Auger Relay Control Board LED3 ...

Page 11: ... on for 1 more minute clearing out ice in the evaporator and then The auger motor relay opens LED3 goes out and the auger motor stops The compressor will not restart until 2 minutes or more have passed after the last shut down If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart Control Board Protection Devices When the water level in the re...

Page 12: ... seal faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker 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 Bearing As the ice is pushed up the evaporator the auger is thrust down and pressure from the auger thrus...

Page 13: ...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 then down the drain NME1254 FME1504 January 2000 Page 13 WATER SCHEMATIC RESERVOIR DRAIN EVAPORATOR DRAIN EVAPORATOR ICE CHUTE WATER LEVEL Note The water level may be checked by comparing the level of water in the reservoir to the line molded into the side...

Page 14: ...ending 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 p...

Page 15: ... 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 machine begins to use water from 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 t...

Page 16: ...cated in the water reservoir At least twice a year the probe should be removed from the reservoir and the tip wiped clean of mineral build up 3 Clean or replace the air cooled condenser filter Clean the air cooled condenser Use a vacuum cleaner or coil cleaner if needed Do NOT use a wire brush NME1254 FME1504 June 2002 Page 16 ICE LEVEL SENSORS SLIDE IN AND OUT ICE CHUTE SENSOR and CONDENSER MAINT...

Page 17: ...the action of the bearing It should rotate smoothly To remove the breaker remove the lower ice chute then take out all four allen head cap screws and pull the breaker off the auger and evaporator If the bearing only needs grease inject grease into the bearing using Scotsman grease needle pn 02 3559 01 and Scotsman bearing grease cartridge pn A36808 001 Be sure to inject grease evenly and thoroughl...

Page 18: ...e the auger remove the front and top panels 2 Push back bail clamp holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4 Remove ice chute from evaporator 5 Remove 4 allen screws holding breaker to evaporator 6 Drain the evaporator by lowering and uncapping the evaporator drain hose 7 Pull up to remove auger After the auger has been removed allow the auger to dry if...

Page 19: ... down Unit is shut down Circuit board has shut ice machine down due to high auger motor amp draw Check for cause of high amp draw including bearings gearmotor condition and scale on auger and in evaporator Low pressure control open Auger not turning due to motor failure auger relay failure on circuit board or gears stripped Check drive train TXV restricted or not metering Check bulb temperature La...

Page 20: ...ve water use Water cooled model water regulating valve not adjusted properly Adjust to 245 PSIG discharge pressure Reservoir float valve leaks thru Replace float valve or seat Water cooled model overcharged with refrigerant Recover and weigh refrigerant Weigh in correct charge Water cooled model condenser coated with minerals Acid clean water cooled condenser Excessive ice meltage Bin drain clogge...

Page 21: ...or contactor coil If it is on the ice sensors may be blocked Remove them and check for mineral scale Scotsman s test box can also be used to determine if the ice sensors or board are defective Using the tester A Disconnect the ice sensors at the connection by the ice chute Connect the LED and PHOTO TRANS wires to the control board s wires B With the On Off mode switch in either position move the B...

Page 22: ...eassemble 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 reassemble be certain t...

Page 23: ... 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 A36808 001 bearing grease Replace top seal and check the o rings...

Page 24: ... breaker to evaporator d Lift up and 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 after it is dry it will be seen to be stained Scrub...

Page 25: ...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 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 ...

Page 26: ...ated 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 be...

Page 27: ...and shaft are one pressed together assembly Replace as a unit C Inspect the oil gears and bearings If the oil level and condition is acceptable quickly check the gears and bearings They are likely to be fine if the oil appears normal 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...

Page 28: ...e 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 1 After a thorough evacuation shut off the manifold valves and switch off the vacuum pump 2 Place a drum of R 404A onto an electronic scale 3 Attach the charging hose to the drum 4 Open the valve on the drum and purge the charging hose 5 Zero out the scale 6 Shut ...

Page 29: ...eck the filters if there are any 2 Check the power supply to the machine Reset the breaker if it is tripped 3 If 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 NME1254 FME1504 January 2000 Page 29 ...

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