Scotsman FDE474 User Manual Download

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Electrical System

CONTROL SYSTEM DIAGNOSTICS

The control system consists of:

Control Board

Water Sensor

Ice Sensors

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 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 water sensor.

B. Pull water sensor from 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 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 light should go ON. If it

does not, replace the control board.

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.

If it is OFF and the auger motor is running but the

compressor is not, check the compressor 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. Move the Bin Full switch on the tester to Bin Full

- the tester's light will blink and after a few seconds

the bin full light on the control board will come on.

If not, replace the board.

Move the Bin switch on the tester to Bin Empty.

The light on the tester will go out, and after a few

seconds the Bin Full light on the board will go out.

If master switch is ON, the unit should start.

FDE474

March 2000

Page 22

Summary of Contents for FDE474

Page 1: ...t FDE474 March 2000 Page 1 Table of Contents Specifications Page 2 To The Installer Page 3 For The Electrician Page 4 For The Plumber Page 5 Optional Kits Page 6 Wall Mount Kit KWB1 Page 7 Final Check List Initial Start Up Page 8 User Operation Page 9 Component Location Function Page 10 Component Description Control Box Page 11 Electrical Sequence Page 12 Refrigeration System Operation Page 13 Wat...

Page 2: ...rd for safety and performance They meet or exceed the standards of UL NSF and CUL 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 parts and of other components not specifically approved by Scotsman Scotsman reserves the right to make design changes and or improvements at any time Specifications...

Page 3: ...are part of the water and have to be treated A water filter is always a good idea but does require regular maintenance to change the cartridge In some water conditions water treatment may be required Generally this means a polyphosphate feeder of some kind Water softeners are not recommended for the FDE474 General Installation Place the machine in its final location Remove the top right and left s...

Page 4: ... licensed electrician may be required in some situations Remove the back panel to make the electrical connection The electrical connection is made on the terminal strip in the junction box inside the machine Replace the back panel when the electrical connections are complete FDE474 March 2000 Page 4 FOLLOW ALL APPLICABLE LOCAL STATE AND NATIONAL CODES This Unit MUST BE GROUNDED Electrical Power Re...

Page 5: ...the bin drain a 5 8 plastic tube Install rigid tubing between the machine and the building drain Route the drains separately to the building drain Water supply Connect cold potable water to the machine A hand valve near the location is recommended A water filter is also a good idea Follow all local codes FDE474 March 2000 Page 5 FOLLOW ALL APPLICABLE LOCAL STATE AND NATIONAL CODES Strainer or Filt...

Page 6: ... Mount the dispenser on the base The flange of the dispenser base fits in slots provided in the base extension Secure the base extension to the sink with the 3 screws on the front side panel 7 Mount the sink in place and secure with two machine screws 8 Install splash plate to cabinet with four machine screws The splash plate fits over the sink 9 Install the glass filler lever and holder to the sp...

Page 7: ...et 3 Drill out the holes as marked in the illustration in the back of the frame with a 3 16 drill bit 4 Place top hanger bracket on the inside of the frame and fasten to the frame with the four screws removed in step 2 Top Wall Bracket 1 Hold the bracket on the wall where it will be mounted 2 Mark on the wall the positions of the holes in the bracket 3 If needed drill pilot holes for the fasteners...

Page 8: ...e electrical power After a few seconds the machine will start 6 Let the machine operate listen for any unusual noises If needed reposition tubing panels to eliminate vibration After the unit has been operating for about 10 minutes there should be enough ice in the bin to test the dispense system 7 Using a container push the glass filler lever in and see that ice is dispensed the bin drive motor co...

Page 9: ...k or a back up of ice in the spout will occur To Vend Ice and Water Switch the Water Switch to ON Push in the glass filler lever water and ice will be dispensed into the container below the spout Note The water is NOT cooled it is the same temperature as the building supply water Daily Maintenance Pour hot water into the sink to flush out any debris or build up Wipe the cabinet off wash the sink a...

Page 10: ...e the bin that causes the ice to be swept over the spout and dispensed The vane is rotated by a gear motor at the top of the bin Bin Cover The bin cover not only keeps dirt from the ice storage bin it also is the support for the dispense gear reducer and the location of the electric eye bin controls Condenser The FDE474 uses an air cooled condenser It blows air out away from the fan motor The heat...

Page 11: ... 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 FDE474 March 2000 Page 11 Service Light Water OK Light Bin Full Light Freeze Light Compressor Relay Auger Relay Control Board LED1 LED3 Power OK Light ...

Page 12: ...nd drive motor Shut Down The board s compressor relay opens LED1 goes out The external compressor relay opens The compressor stops The auger motor stays 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 t...

Page 13: ... and low pressure cause the refrigerant to evaporate and absorb heat from the metal walls of the evaporator After the refrigerant has flowed thru the evaporator it goes back to the compressor thru the suction line as a low pressure vapor At the compressor the cycle is repeated The FDE474 uses a low side pressure control as a safety it will shut the system down if the suction pressure is too low fo...

Page 14: ...porator there is a water seal This seal is the type that has a rotating half and a stationary half The area where the two seals touch are smooth flat surfaces When the auger is installed in the evaporator it forces the rotating half of the seal against the stationary half The stationary half is spring loaded and provides a firm pressure against the auger portion of the seal FDE474 March 2000 Page ...

Page 15: ...l continue to operate for about 2 minutes to clear the evaporator of ice Water Control Because water is such an important requirement for making ice a water level sensor has been placed in the reservoir If the water supply to the machine should fail the water level sensor will send a signal to the control board to shut down the machine Refrigeration The refrigeration system uses a hermetic compres...

Page 16: ...ble sanitizing solution may be obtained by mixing 1 ounce of household bleach with 2 gallons of clean warm 95o F 115o F water 13 Unplug or disconnect electrical power 14 Remove bin top pour in warm potable water to melt out any ice 15 Pull out the vane and bin bottom from the bin 16 Thoroughly wash the bin s interior bin top interior spout ice vane and bin bottom with the sanitizing solution Pour ...

Page 17: ...f the water supply 3 Remove top panel 4 Remove right side panel 5 Drain the evaporator and reservoir 6 Remove foam cap on top of evaporator 7 Remove 2 permagum plugs from the side of the evaporator 8 Remove 2 screws screwheads were covered by the permagum 9 Pull up on the pull ring to remove the auger If it is difficult to pull A Remove the breaker cover by taking the snap ring out B Unscrew the a...

Page 18: ...alant to come into contact with the face of the seal 4 Wash the stationary half the water seal with water Slip it up into the bottom of the evaporator until the bottom of the seal is inside the evaporator about 1 4 5 Push the bottom bearing against the water seal until the bottom bearing is inside the evaporator about 1 16 6 Replace the evaporator on the adapter and re attach the stand using the o...

Page 19: ...nsor The water level sensor may not shut the ice machine off when the reservoir goes dry if there is a film of mineral scale on the probe tip 1 Remove the top panel 2 Remove the reservoir cover 3 Pull the water level probe up and out of the reservoir 4 Carefully wipe the tip of the probe with a clean cloth Ice machine cleaner may be needed Note The tip is made of glass 5 Reinsert the water level s...

Page 20: ...ear reducer No refrigeration Check refrigeration system Ice in bin but will not dispense Drive motor does not turn Vend switch does not close Check replace vend switch Dispense motor open Check replace dispense motor Dispense output shaft broken Check replace output shaft Ice in bin motor turns vane Ice jammed up Users held cup against dispense spout and jammed unit Advise owner manager to instruc...

Page 21: ...lenoid coil open Replace solenoid Vend switch open Replace switch Water turned off Restore water supply Water drips from spout Melting ice in chute Some water dripping is normal Water solenoid leaks thru Replace solenoid Ice jammed in spout Clear ice jam check for cause Bin drain restricted Clean drain check bin drainage Ice will not stop dispensing Vend switch stuck closed Replace switch Water le...

Page 22: ... to the wire where the water sensor plugs into and place the other end in the water The water OK light should go ON If it does not replace the control 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 If it is OFF and the auger motor is running but the compressor is not check the compressor contactor c...

Page 23: ... Motor 1 Disconnect electrical power 2 Remove top panel 3 Remove one screw holding ground strap to cabinet frame 4 Cut off two dispense motor wire nuts 5 Remove screws holding dispense drive gear motor to the bin top 6 Pull gear motor off the bin top 7 Unscrew the output shaft extension from the gear motor 8 Remove screws holding the mounting bracket to the gear motor 9 Reverse to reassemble be ce...

Page 24: ...rvoir and lift the valve out of the reservoir tank 6 Replace with a new valve or replace the valve plunger Valve Plunger 1 After the valve has been removed from the reservoir remove the nut holding the valve to its mounting bracket 2 Pull out the cotter pin to release the internal valve plunger Note Do not replace the plunger if the valve s seat is damaged Replace the valve Inlet Water Valve 1 Dis...

Page 25: ...ap the bottom of the auger and force the auger up Do NOT damage the splines of the auger or the auger will have to be replaced If the auger is frozen to the bottom bearing do not force the bottom bearing thru the evaporator 1 Remove three cap screws holding evaporator to the adapter stand 2 Lift evaporator up slightly and tip the bottom out to expose the splined end of the auger 3 Remove snap ring...

Page 26: ...f the water seal with water Slip it up into the bottom of the evaporator until the bottom of the seal is inside the evaporator about 1 4 5 Push the bottom bearing against the water seal until the bottom bearing is inside the evaporator about 1 16 6 Replace the evaporator on the adapter and re attach the stand using the original bolts 7 Attach the auger to the top bearing and breaker 8 Return the a...

Page 27: ...ess valves must be in the closed position before the hose caps are removed Do not remove the hose caps before checking the position of the valve Use a 3 16 allen wrench to open and close the valve As with any other refrigerant do not place pressurized air or oxygen into the refrigeration system Note The refrigeration system uses an HFC type refrigerant and MUST use an HFC type drier Evacuation to ...

Page 28: ...olding the gear reducer to the cabinet frame 12 Trace auger drive motor wires back to the control box 13 Disconnect the drive motor wires from the relay on the circuit board 14 Pull the wires back to the auger drive motor 15 Pull the gear reducer out the side of the cabinet to remove it from the machine Note If there is evidence of water near the output shaft of the gear reducer it would be a wise...

Page 29: ...nto a relay on the circuit board 2 Disconnect the auger motor s wires and pull them back to the auger drive motor 3 Lift the auger motor windings off the gear reducer If the rotor needs to be removed 1 Run a screw into the top of the rotor 2 Grasp the screw with a grip pliers 3 Pull and or tap on the pliers to pull the rotor bearing out of the gear reducer 4 Inspect the bearing and input seal Repl...

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