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 . [. . . ] Clean the condenser: the condenser may appear to be clean on the surface, but it can still be clogged internally. Check with a flash light from the front to see if light can be seen though the condenser fins. Step 3: Clean the condenser. December, 1988 Page 18 FM800 MAINTENANCE AND CLEANING: Auger 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. For more information on removal of these parts, see REMOVAL AND REPLACEMENT. //////////////////////////////WARNING//////////////////////////// Switch off electrical power, and turn off the water supply. ////////////////////////////////////////////////////////////////////////// 1. 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. Reverse to reassemble. December, 1988 Page 19 FM800 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES A. 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. [. . . ] Then lift the cover (with drive motor attached) up and away from the gear motor case. Note: The gearcase cover, output gear, bearings and output shaft are a pressed together assembly. If the oil level and condition is acceptable, quickly check the gears and bearings. If there is evidence of water in the oil (rusty bearings and gears; the oil having a creamy white appearance; oil level too high) carefully inspect the bearings and gears. [. . . ]