Service manual

ManualsBrandsScotsman ManualsDomestic AppliancesTDE650

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 maker-dispenser.

The TDE650 is a combination nugget ice maker

and countertop dispenser, with the option of wall

mounting.

The TDE650 ice making section is equipped with

the following features: electronic controls for bin

level and low water; thermostatic expansion valve;

front service for most components; and R-404A

(HP62) refrigerant. The ice dispensing section is a

seamless plastic storage bin, with a stainless steel

rotating vane to sweep the ice into the dispensing

chute.

Table of Contents

FOR THE INSTALLER: Specifications . . . . . . . . . . . . . . . . . . . . . Page 2

FOR THE INSTALLER: Environmental Limitations . . . . . . . . . . . . . . . . Page 3

FOR THE INSTALLER: Wall Mount Kit . . . . . . . . . . . . . . . . . . . . Page 5

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . Page 8

INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . Page 10

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . Page 12

ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

OPERATION: Ice Vending . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

DISPENSE AREA SANITATION . . . . . . . . . . . . . . . . . . . . . . . Page 17

CLEANING and SANITIZING . . . . . . . . . . . . . . . . . . . . . . . . Page 18

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . Page 19

SERVICE DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

SERVICE DIAGNOSIS: Circuit Board . . . . . . . . . . . . . . . . . . . . . Page 23

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . Page 24

REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . Page 25

REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . Page 27

TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY . . . . . . . . . . . Page 29

REFRIGERATION SERVICE: R-404A (HP62) . . . . . . . . . . . . . . . . . Page 30

Parts Lists and Wiring Diagrams are printed on

yellow paper in the center of this manual.

This manual was printed on recycled paper.

Keep it for future reference.

Note this symbol when it appears.

It marks a possible hazard.

TDE550 & TDE650

November 1995

Page 1

Summary of content (32 pages)

PAGE 1
TDE550 & TDE650 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 maker-dispenser. The TDE650 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting.
PAGE 2
TDE550 & TDE650 FOR THE INSTALLER: Specifications Before beginning the installation, check that all the materials and kits required are available at the installation location. This ice maker-dispenser is designed to be mounted on a machine stand, or a countertop, or using wall mounting kit KWB3, hung from a wall. The sink may be retained, or removed and the optional longer splash panel (KSP2) installed in place of the original. Instructions for each kit are included in this service manual.
PAGE 3
TDE550 & TDE650 FOR THE INSTALLER: Environmental Limitations Installation Limitations This ice system is designed to be installed indoors, in a controlled environment. Minimum Maximum Air Temp 500F. 1000F. Water Temp 400F. 1000F. Water Pressure 20 PSI 80 PSI Voltage (115v) 104 126 Service Limitations Do not install in a location where the top of the machine is within 6" of a fixed ceiling.
PAGE 4
TDE550 & TDE650 FOR THE INSTALLER Location After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space above and behind it for service. Air cooled models require a minimum of 6 inches to the left and right of the machine for air circulation. Machine Stand Installation Tip the stand on its back and install the legs, return the stand to the upright position. Adjust leg levelers so that the stand does not “rock”.
PAGE 5
TDE550 & TDE650 FOR THE INSTALLER: Wall Mount Kit /////////////////////////////CAUTION/////////////////////////////////// It is recommended that the wall mounting installation be done by an experienced contractor. The weight of the machine when in use may exceed 350 pounds. The unit should be mounted on a solid, rigid wall with proper fasteners for that type of wall and of adequate strength to support the weight of the machine when in use.
PAGE 6
TDE550 & TDE650 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, connect to the 3/8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. Water Treatment: In most areas, a water filter of some type will be useful.
PAGE 7
TDE550 & TDE650 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine. ELECTRICAL POWER Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. The 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.
PAGE 8
TDE550 & TDE650 FOR THE INSTALLER: Final Check List BACK VIEW OF COMPLETED INSTALLATION 1. Is the icemaker-dispenser installed indoors, in a location where the air and water temperatures are controlled, and where they do not go beyond design limitations? ELECTRICAL? LEVELED? 2. Is there an electrical service disconnect within sight of the installed machine? Is the machine on a separate circuit? Has the voltage been checked and compared to nameplate requirements? 3.
PAGE 9
TDE550 & TDE650 INITIAL START UP Pre Start Inspection 1. Remove the two front panels. 2. Check that all shipping blocks have been removed. 3. Remove any and all packing tape (check inside the storage bin). Start Up 1. Go through the pre start inspection. 4. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. Check that the fan blade on air cooled models turns freely. 5.
PAGE 10
TDE550 & TDE650 COMPONENT DESCRIPTION High Pressure Cut Out Switch: A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machine off if the discharge pressure should ever exceed 450 psig. Evaporator: A vertical stainless steel tube, refrigerated, and water filled. In it there is a stainless steel auger. Reservoir: Float operated, it maintains the water level in the evaporator at a constant level, it also contains the water level sensor.
PAGE 11
TDE550 & TDE650 COMPONENT DESCRIPTION Evaporator: A refrigerated vertical tube filled with water and containing a water seal and auger. Motor: A split phase motor that drives the gear reducer. Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator. Thrust Bearing: As the ice is pushed up the evaporator, the auger is thrust down, and pressure from the auger thrust is taken up by this bearing.
PAGE 12
TDE550 & TDE650 COMPONENT DESCRIPTION: Control Box Circuit Board: The circuit board receives input signals from several sensors and translates them to control the electrical power supply to the various loads. START CAPACITOR The sensors include: • Touch Free ice or water. • Ice level in the bin. • Water level in the reservoir. The loads include: • Compressor contactor • Fan motor • Bin drive motor • Auger drive motor • Water solenoid.
PAGE 13
TDE550 & TDE650 ELECTRICAL SEQUENCE Refer the wiring diagram as needed. The "Power" light on the board glows whenever there is power to the machine (and the master switch is ON). If the machine is switched off at the master switch, but is otherwise ready to go, switching the master switch to ON does the following: • The bin empty and power lights on the circuit board glow. • There is a 15 second delay • If there is enough water in the reservoir, the circuit board will allow the machine to start up.
PAGE 14
TDE550 & TDE650 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, goes to a strainer and then to the water reservoir which it enters through the float valve. The water then goes out the bottom of the reservoir tank to the bottom of the evaporator. Reservoir overflow, evaporator condensation and water in the sink are all routed to the drain.
PAGE 15
TDE550 & TDE650 OPERATION: Refrigeration Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and it then condenses into a liquid. This high pressure liquid then goes through the liquid line to the expansion valve.
PAGE 16
TDE550 & TDE650 OPERATION: Ice Vending Dispensing takes place when the Touch Free sensor’s infrared beam bounces back to the sensor from a container placed directly in front of it. ICE DISPENSING VANE If the container is in front of the Touch Free sensor on the left side, the ice dispensing vane will rotate and sweep ice over the ice dispensing chute: ice will continue to discharge out this chute as long as the vane is turning. It stops when the dispensing vane stops.
PAGE 17
TDE550 & TDE650 DISPENSE AREA SANITATION The dispense area; spouts, sink, grill and splash panel will need periodic cleaning and maintenance. 1. The ice chute may be pulled down to remove it from the ice dispenser. Wash and sanitize it. 2. The sink grill may be removed for washing and sanitizing. 3. The sink should be flushed with hot water and wiped clean with sanitizer. 4. The splash panel requires special attention to clean it.
PAGE 18
TDE550 & TDE650 CLEANING and SANITIZING A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, and less costly in the long run, to avoid possible down time by keeping it clean; adjusting it as needed; and by replacing worn parts before they can cause failure.
PAGE 19
TDE550 & TDE650 MAINTENANCE AND CLEANING Slide UP To Remove Moving Parts Hazard. Disconnect electrical power to the icemaker dispenser before beginning. Reservoir 1. Air Cooled Models: Check the air cooled condenser for lint, dirt or grease build-up. Clean with vacuum or soft brush until light can be seen thru the fins. BIN CONTROL SENSOR BIN CONTROL SENSOR CLEAN WATER SENSOR PROBE ////////CAUTION////// THE TIP IS MADE OF GLASS BIN TOP See Removal and Replacement to replace ICE SWEEP 2.
PAGE 20
TDE550 & TDE650 MAINTENANCE AND CLEANING In some areas, the water supply to the ice maker will contain a high concentration of minerals, and that will result in an evaporator and auger Moving Parts Hazard. Disconnect electrical power to the icemaker dispenser before beginning. becoming coated with these minerals, requiring a more frequent removal than twice per year. If in doubt about the condition of the evaporator and auger, the auger can be removed so the parts can be inspected.
PAGE 21
TDE550 & TDE650 SERVICE DIAGNOSIS Symptom No ice made, nothing operates Possible Cause Unit off due to no power Unit off due to master switch in OFF position Unit off due to low water level Unit off due to ice level sensors (photo-electric eyes) blocked Unit off due to scale on water level sensor Unit off due to water temperature too high Unit off due to auger motor overloaded (only up to serial number 804817-05M) Unit operates, no ice is vended Compressor on, auger motor is off Compressor does not oper
PAGE 22
TDE550 & TDE650 SERVICE DIAGNOSIS Symptom No water is vended Makes ice, but with excessive noise Will not dispense ice Auger motor off, top light on board is ON (only up to serial number 804817-05M).
PAGE 23
TDE550 & TDE650 SERVICE DIAGNOSIS: Circuit Board 1* 2 - Reset Button * 3 4 5 6* Circuit Board Light Identification 7* 8 Explanation of Indicator Light or Reset* Will be On after the second auger motor trip, indicating that the machine must be cleaned and/or inspected for drive train maintenance and manually reset.* This button must be pushed if the auger motor has overloaded twice.* On at all times when the master switch is ON and machine is connected to electrical power.
PAGE 24
TDE550 & TDE650 REMOVAL AND REPLACEMENT WATER RESERVOIR BIN CONTROLS (Ice Level Sensors) 1. Shut off the water supply to the icemaker. 1. Disconnect electrical power. 2. Remove front panel and reservoir cover. 2. Remove front panel. 3. Disconnect inlet water line from valve. 3. Remove control box cover. 4. To remove just the float, push the locking tab at the back of the valve mounting block in and lift the valve and block up and out of the reservoir tank. 4.
PAGE 25
TDE550 & TDE650 REMOVAL AND REPLACEMENT: Bearing And Breaker Note: Removal of the auger, water seal, evaporator and gearmotor must begin at the top of the assembly. c. Unscrew 4 allen head cap screws holding breaker to evaporator. d. Lift up, and remove breaker/bearing assembly from auger & evaporator. 6. Service the bearing. Check for rust, rough spots and damage. Moving Parts Hazard. Disconnect electrical power to the icemaker dispenser before beginning. To Remove the Breaker Bearing Assembly: 1.
PAGE 26
TDE550 & TDE650 REMOVAL AND REPLACEMENT To Remove the Auger: d. Lift up & remove breaker from evaporator. Turn off the water to the machine, and unclip the evaporator drain hose, pull it down and drain the evaporator into the bin or a container. 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: Moving Parts Hazard.
PAGE 27
TDE550 & TDE650 REMOVAL AND REPLACEMENT: Water Seal To Remove the Water Seal: 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. (Assuming all steps to remove the auger have been performed.) 1. The gearmotor/evaporator assembly will have to be exposed. (See illustration - next page) 2. Remove the 4 hex head cap screws holding the evaporator to the gearmotor assembly.
PAGE 28
TDE550 & TDE650 REMOVAL AND REPLACEMENT To Replace the Evaporator: 6. Install an new drier in the liquid line. (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) 7. Evacuate the system until dehydrated, then weigh in the nameplate charge. Check for leaks. 1. Discharge the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: To Reassemble the Evaporator and Auger a) At the thermostatic expansion valve outlet. 1.
PAGE 29
TDE550 & TDE650 TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY (Assuming that the procedures through removal of the water seal have been performed.) Electrical Shock Hazard. Disconnect electrical power to the icemaker dispenser before beginning. 1. Remove the electrical wires from the gear drive motor. 2. Unscrew the 4 cap screws holding the gearmotor to the gearmotor plate.
PAGE 30
TDE550 & TDE650 REFRIGERATION SERVICE: R-404A (HP62) THIS ICE MACHINE USES HP62 REFRIGERANT AND POLYOLESTER COMPRESSOR OIL. Pressure-Temperature Chart for HP62 DO NOT USE MINERAL OIL IN THIS REFRIGERATION SYSTEM. VAPOR • R-404A is a “Near Azeotrope”, and therefore liquid charging is required. Weigh into the discharge side as much as possible of the charge as liquid refrigerant. Install a sight glass between the manifold and the suction side hose.
PAGE 31
TDE550 & TDE650 REFRIGERATION SERVICE General Information: Work on the refrigeration system should only be done when it is certain that the system needs repair. • Refrain from checking refrigeration refrigerant placed into a Scotsman ice machine must meet ARI spec 700-88. Reclaim programs are available through most refrigerant wholesalers. Access Valves: To use the access valves: Remove the cap from the stem, use a 3/16" allen wrench to check that the valve is CLOSED. The remove the core cap.
PAGE 32
TDE550 & TDE650 CIRCUIT BOARD SERVICE Printed Circuit Board Handling Precautions Follow these simple precaustions when replacing a Printed Circuit Board 1. Keep the replacement PC Board in the anit-static packaging until it is ready to be installed. 2. Be sure that your hands are clean. 3. Just before touchingthe board, touch the cabinet of the machine to discharge any possible build up of static electricity. 4. Handle the original and replacment boards only by their outer edges. 5.