User manual SCOTSMAN ND650

[. . . ] ND650 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 ND650 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. The ND650 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 R502 refrigerant. The ice dispensing section is a seamless plastic storage bin, with a stainless steel ice agitator at the bottom to sweep the ice into the dispensing chute. TABLE OF CONTENTS For the Installer Specifications . [. . . ] The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral buildup. The bin control uses devices that sense light, therefore they must be kept clean enough so that they can "see". At least twice a year, remove the bin control sensors from the grommets in the ice chute, and wipe them clean. BIN CONTROL SENSOR BIN CONTROL SENSOR CLEAN WATER SENSOR PROBE ////////CAUTION////// THE TIP IS MADE OF GLASS ////////////////////////////// BIN TOP ICE SWEEP 3. The bearing in the breaker should also be checked at least two times per year. 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. Check and tighten all bolts and screws. March, 1989 Page 19 ND650 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 doubt about the condition of the evaporator and auger, the auger can be removed so the parts can be inspected. Note: Water filters can filter out suspended solids, but not dissolved solids. "Soft" water may not be the complete answer. Check with a water treatment specialist regarding water treatment. For more information on removal of these parts, see REMOVAL AND REPLACEMENT. To remove the auger, remove the front and top panels. Remove 3 hex studs holding ice chute cover to ice chute, and remove cover. Loosen band clamp under ice chute, and remove ice chute from evaporator. Remove 4 allen screws holding breaker to evaporator. After the auger has been removed, allow the auger to dry: if the auger is not bright and shiny, it must be cleaned. Clean the auger and evaporator as required. Reverse to reassemble. ALLEN HEAD SCREWS BREAKER AND AUGER ASSEMBLY March, 1989 Page 20 ND650 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: ICE MAKER DOES NOT OPERATE A. Check: Voltage to the unit, restore it if there is none. Check: The master switch, switch ON if off. [. . . ] Bench test the gearmotor, check for oil leaks, noise, and amp draw. March, 1989 Page 31 ND650 TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY WATER SHED GREASE SEAL CENTRIFUGAL SWITCH DRIVE MOTOR GEARCASE COVER FIRST GEAR AND BEARINGS ROTOR BEARING ROTOR SHAFT SEAL SECOND GEAR AND BEARINGS GASKET GEARCASE /////////////////////////////WARNING//////////////////////////// Disconnect electrical power before begining removal procedures. ////////////////////////////////////////////////////////////////////////// March, 1989 Page 32 ND650 REMOVAL AND REPLACEMENT INSTRUCTIONS FOR USING TESTER MODEL FC1 (Optional, order part no. A33942-001) (These instructions assume that the unit will not run, and prior investigation of electric power, controls, and mechanical parts indicates that the electronic circuit may be at fault. ) /////////////////////////////////////////////////////////////////////////////WARNING///////////////////////////////////////////////////////////// These procedures require the machine to be connected to the power supply. The voltages of the electronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. [. . . ]