User manual SCOTSMAN FM800

[. . . ] FM800 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 FM800 is a modular ice system that fits a variety of Scotsman ice storage bins. It 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 R-502 as the refrigerant. TABLE OF CONTENTS Installation For the Installer Specifications . 4 Two units on one bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 For the Plumber . [. . . ] 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. ALLEN SCREWS BREAKER & BEARING & AUGER ASSEMBLY 6. Drain the evaporator by lowering and uncapping the evaporator drain hose. 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. December, 1988 Page 19 FM800 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES A. Check: Voltage to the unit, restore it if there is none. Check: The master switch, switch ON if off. Check: The 3 reset switches, (circuit board, high and low pressure): depress and release each switch. If the still does not start, check: the spout switch; the high and the low side pressures. Check the low pressure cut out, if closed, go to E; if it is open, it could be due to: · Low refrigerant charge · The auger not turning · Restricted system · TXV not opening 1. Check the low side pressure, the low pressure cut out opens at pressure below 4 psig. Check if the auger is turning, if it is not, remove the gearbox and: Check for internal damage, repair and replace in the machine. Check for low charge, add some refrigerant, if the unit will operate, (normal low side pressure being about 30 psig) stop and look for a leak, repair, replace the drier, evacuate, and weigh in the nameplate charge. If, with added charge, the unit does not operate: Check for a restricted system, replace the drier, evacuate, and weigh in a nameplate charge. Check for a Thermostatic Expansion Valve that does not open, if defective, replace it. Replace the drier, evacuate, and weigh in the nameplate charge. Check the high pressure cut out, if closed go to F, if open check 1. The pressure control opens at 450 psig. Check the high side pressure, reset the control, and observe: on water cooled, that water soon begins to flow from the condenser drain; or, on air cooled, that the fan is forcing air through the condenser. If the unit trips out on pressures below 450 psig, replace the control. If the pressures rise above the trip out point, and the unit shuts down: a. [. . . ] The two smaller gears and the oil should be in the lower case, the output gear will be with the cover. As you lower the cover onto the lower case, the cover will have to be moved closer to the second gear after the output gear has cleared the second gear top bearing. E) After the case is together, and the locating pins are secure in both ends, GEAR CASE replace all cap screws. . Bench test the gearmotor, check for oil leaks, noise, and amp draw. December, 1988 Page 29 FM800 CIRCUIT BOARD TESTING INSTRUCTIONS FOR USING TESTER MODEL FC1 (Optional, order part no. [. . . ]