Scotsman MDT5N25 Service Manual
  1. Manuals
  2. Brands
  3. Scotsman Manuals
  4. Ice Maker
  5. TouchFree MDT5N40
  6. Service manual

Scotsman MDT5N25 Service Manual

Ice maker-dispenser
Hide thumbs Also See for MDT5N25:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Installer and User Manual
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 machine is a combination nugget ice maker
and countertop dispenser, with the option of wall
mounting.
FOR THE INSTALLER: Specifications· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2
FOR THE INSTALLER: Environmental Limitations · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3
FOR THE INSTALLER· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4
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 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11
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
REFRIGERATION SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 31
CIRCUIT BOARD SERVICE· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 32
LIQUID CHARGING
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 32
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.
MDT5N25 & MDT5N40
The 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
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
Note this symbol when it appears.
May 2001
Page 1
It marks a possible hazard.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MDT5N25 and is the answer not in the manual?

Questions and answers

Related Manuals for Scotsman MDT5N25

Summary of Contents for Scotsman MDT5N25

  • Page 1 The machine is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. FOR THE INSTALLER: Specifications· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2 FOR THE INSTALLER: Environmental Limitations ·...

  • Page 2: For The Installer: Specifications

    MDT5N25 & MDT5N40 FOR THE INSTALLER: Specifications 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 (KSP5) installed in place of the original.

  • Page 3: For The Installer: Environmental Limitations

    Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL and NSF.

  • Page 4: For The Installer

    Place the cabinet onto the machine stand, so that the unit is lined up with the holes. Secure the ice maker-dispenser to the machine stand with bolts and washers. In both counter top and machine stand installations, wipe off and neatly smooth any excess sealant.

  • Page 5: For The Installer: Wall Mount Kit

    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: For The Plumber

    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.

  • Page 7: For The Electrician

    MDT5N25 & MDT5N40 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the INDIVIDUAL CIRCUIT rear of the machine. FOR ICE DISPENSER Check the nameplate (located on the...

  • Page 8: For The Installer: Final Check List

    MDT5N25 & MDT5N40 FOR THE INSTALLER: Final Check List 1. Is the icemaker-dispenser installed indoors, in a BACK VIEW OF COMPLETED INSTALLATION location where the air and water temperatures are controlled, and where they do not go beyond ELECTRICAL? design limitations? 2.

  • Page 9: Initial Start-Up

    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). 4. Inspect the interior of the machine for loose screws or wires.

  • Page 10: Component Description

    MDT5N25 & MDT5N40 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.

  • Page 11: Water Seal

    COMPONENT DESCRIPTION Evaporator: A refrigerated vertical tube filled with water and containing a water seal and auger. Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator. Water Seal: A two part “face” seal, the top half rotating with the auger, the bottom half stationary, the sealing action being where the two seal “faces”...

  • Page 12: Component Description: Control Box

    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. The sensors include: · Touch Free ice or water. · Ice level in the bin. ·...

  • Page 13: Electrical Sequence

    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: ·...

  • Page 14: Operation: Water

    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.

  • Page 15: Operation: Refrigeration

    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.

  • Page 16: Operation: Ice Vending

    MDT5N25 & MDT5N40 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 ICE DISPENSING VANE If the container is in front of the...

  • Page 17: Dispense Area Sanitation

    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.

  • Page 18: Cleaning And Sanitizing

    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;...

  • Page 19: Maintenance And Cleaning

    MAINTENANCE AND CLEANING Moving Parts Hazard. Disconnect electrical power to the icemaker - dispenser before beginning. 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.
  • Page 20 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 becoming coated with these minerals, requiring a more frequent removal than twice per year. If in...

  • Page 21: Service Diagnosis

    Check/clean ice level sensors Clean water level sensor Thermistor will shut down unit at temperatures over 110 If no ice, check that ice maker can make ice Check that machine cannot keep up with needs Pull chute down and allow ice to fall out.
  • Page 22 Probable Correction Allow 2 minutes for system to reset Restore water supply Replace valve if necessary Clean ice making system with Scotsman Ice machine cleaner Check top bearing for proper lubrication Check auger drive for proper lubrication Replace auger motor Locate vibrating component and secure it.

  • Page 23: Service Diagnosis: Circuit Board

    SERVICE DIAGNOSIS: Circuit Board Explanation of Indicator Light On at all times when the master switch is ON and machine is connected to electrical power. On when ice level is low (unit making ice). Normal 6 minute off/delay start. To prevent short cycling, the machine will not restart after any shut off (except power to the board) until 6 minutes have passed.

  • Page 24: Removal And Replacement

    REMOVAL AND REPLACEMENT WATER RESERVOIR 1. Shut off the water supply to the icemaker. 2. Remove front panel and reservoir cover. 3. Disconnect inlet water line from valve. 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.

  • Page 25: Removal And Replacement: Bearing And Breaker

    REMOVAL AND REPLACEMENT: Bearing And Breaker Note: Removal of the auger, water seal, evaporator and gearmotor must begin at the top of the assembly. Moving Parts Hazard. Disconnect electrical power to the icemaker - dispenser before beginning. To Remove the Breaker Bearing Assembly: 1.
  • Page 26 REMOVAL AND REPLACEMENT To Remove the Auger: 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. Moving Parts Hazard. Disconnect electrical power to the icemaker - dispenser before beginning.

  • Page 27: Removal And Replacement: Water Seal

    REMOVAL AND REPLACEMENT: Water Seal To Remove the Water Seal: (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 MDT5N25 & MDT5N40 REMOVAL AND REPLACEMENT To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) 1. Discharge the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: a) At the thermostatic expansion valve outlet.

  • Page 29: To Remove And Repair The Gearmotor Assembly

    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.

  • Page 30: Refrigeration Service: R-404A (Hp62)

    REFRIGERATION SERVICE: R-404A (HP62) THIS ICE MACHINE USES HP62 REFRIGERANT AND POLYOLESTER COMPRESSOR OIL. DO NOT USE MINERAL OIL IN THIS REFRIGERATION SYSTEM. · 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.

  • Page 31: Refrigeration Service

    Recover, reclaim or recycle refrigerant. The method chosen is up to the service company. Any refrigerant placed into a Scotsman ice machine must meet ARI spec 700-88. Reclaim programs are available through most refrigerant wholesalers.

  • Page 32: Liquid Charging

    CIRCUIT BOARD SERVICE Printed Circuit Board Handling Precautions Follow these simple precautions 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.

This manual is also suitable for:

Mdt5n40

Table of Contents

Save PDF