User manual SCOTSMAN NME1250R

[. . . ] NME1250R 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 system. The NME1250R is a remote condenser modular ice system that features: front service for the freezer, gearmotor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; a thermostatic expansion valve; and HP62 as the refrigerant. Table of Contents FOR THE INSTALLER: Remote Condenser . 30 REMOVAL AND REPLACEMENT: Evaporator REMOVAL AND REPLACEMENT: Gearmotor . 35 Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper. [. . . ] Remove bail clip holding the ice chute cover to the ice chute body, and remove the cover. Allow the auger to dry, the stainless steel of the auger and evaporator must be clean and bright. Use coil cleaner if grease is embeded in the fins. Hazardous Moving Parts. In some areas the water supply to the icemaker will have a great deal of minerals in it, 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. The auger has sharp edges, handle with gloves. ALLEN SCREWS BREAKER & BEARING & AUGER ASSEMBLY August 1993 Page 21 NME1250R SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES A. Check: The reset switch ( high pressure): depress and release the switch. Check the high side pressure, reset the switch and observe that the fan is forcing air through the condenser. If the pressures rise above the trip out point, and the unit shuts down: a. If the air flow is poor because of the installation, advise the user that the unit should be moved, or the air around it kept cooler. Check that the fan blades are clean, and the fan secure to the fan motor shaft. Check the head pressure control valve, it should be maintaining a head pressure above 180 psig. If the unit has the correct charge, and the condenser is clean, and the refrigerant lines are not kinked or twisted, and the condenser is not overheated by external heat loads, the head pressure should be under the trip out point of the head pressure control switch. If all of the above are found to be good, and the machine trips out on high head pressure, replace the head pressure control valve. G. If there is not enough water in the reservoir, the water level sensor will keep the machine from starting. a. If the machine does not start, see the next page. June 1994 Page 22 NME1250R SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES F. Check: The gear motor, if it will not run, the compressor will not run. If no power to it: Check: the indicator lights on the circuit board, the bin empty light should be ON, the no water light should be OFF . 1. If the line side has the correct voltage and the load side does not, replace the transformer. If the transformer is good, and the bin empty light is OFF, check the ice level sensors. Look through the ice chute "eye" hole for something blocking the ice chute. Unplug "opto trans" and "LED" connectors from the circuit board. Plug "opto trans" and "LED" connectors from the Scotsman Electronic Control Tester Model NM1 into the circuit board (see page end of manual). [. . . ] . August 1993 Page 33 NME1250R REFRIGERATION SERVICE Recover, reclaim or recycle refrigerant. Any Work on the refrigeration system should only be refrigerant placed into a Scotsman ice machine done when it is certain that the system needs must meet ARI spec 700-88. · Refrain from checking refrigeration Access Valves: To use the access valves: pressures without reason. Visual inspection Remove the cap from the stem, use a 3/16" allen of the water system, observation of the ice wrench to check that the valve is CLOSED. [. . . ]