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Hersteller: Follett Dateigröße: 1.97 mb Dateiname: Unterrichtssprache:

Ten-second delay: There is a 10 second delay in reaction to loss of water (WTR) or bin (B-E) signals. If signals are not lost for more than 10 seconds, no reaction will occur. ProblemIndicators/possible cause Corrective action 1. Icemaker will not run. System status: compressor, gearmotor, and fan motor inoperative. 1. No power to unit. 2. Open bin level control. 3. Water OK LED (WTR) not on. 4. 20M or 2ND LED is on indicating that first or second torque error has occurred. 5. Gearmotor locked up (immediate torque error indicated by LEDs when board is reset). 6. Open coil on gearmotor start relay causing an immediate torque error. 1. Check that unit is plugged in, circuit breakers are on. 2. Adjust or replace ice level control. 3. Check reservoir for water, restore water to unit. 4. See Problem #6. 5. Repair or replace gear motor. 6. Replace gearmotor start relay. 2. Compressor will 1. Condenser coil plugged causing open 1. Clean condenser coil and replace not run. overload or high pressure cut-out.overload if necessary. 2. Defective starting capacitor.2. Replace start capacitor. System status: 3. Defective starting relay. 3. Replace relay. gearmotor and fan 4. Open motor winding. 4. Check Ohm on windings and replace motor run.5. No power output from compressor output compressor if necessary. terminal on control board. 5. Check terminal connection and replace control board if necessary. 3. Unit cycles 1. Float reservoir running dry, sensing probe 1. Check water supply to float and float intermittently. signalling for system to shut down. operation. PC board will have flashing WTR LED. System status: compressor, gear motor, and fan motor cycle. 4. Low ice production. Poor quality ice. 1. Dirty condenser coil. 2. Restricted air flow to condenser coil. 3. Mineral coated evaporator. 4. High ambient water supply and/or air temperature. 5. Improper exhaust air provisions. 6. Faulty expansion valve. 7. Low refrigerant charge. 8. Superheat incorrect. 9. Inefficient compressor. 1. Clean condenser. 2. Remove obstruction. 3. Clean evaporator. 4. Precool water and/or install air duct per Follett installation manual. 5. Provide proper exhaust air provisions per Follett installation manual. 6. Replace expansion valve. 7. Check for leaks; repair, evacuate, and weigh in correct charge. 8. Check that TEV sensing bulb is securely clamped in place and not damaged; check that insulated bulb cover is in place. 9. Replace compressor. 5. Water leaks 1. O ring seal broken. 1. Replace O ring. from bottom of evaporator. 30 Troubleshooting Problem 6. Icemaker runs for short period of time and shuts down on torque error. System status: 20M or 2nd LED are lit. 7. Evaporator is iced up on the outside. No ice production. System status: compressor, gearmotor and fan motor running. 8. Compressor cycles intermittently. System status: gearmotor and fan motor run. 9. Unit runs but not making ice. System status: compressor, gearmotor and fan motor running. 10. Compressor and fan motor will not run. Gearmotor runs. 11. Intermittent noises from evaporator. Indicators/possible cause 1. Kink in ice transport tube. 2. Bin level control remains in closed position. 3. Ice transport tube ruptured internally. 4. Worn evaporator bearings. 5. Faulty gearmotor start relay. Icemaker torques out within 5 seconds of start-up. 6. Torque-out occurs when storage bin fills to capacity. 1. Gearmotor running but no output rotation. 2. Float reservoir empty. 3. Air bubble in water supply line. Water in reservoir but not in evaporator. 1. Defective compressor starting relay or capacitor. 2. High pressure cutout open due to high head pressure. 3. Clogged or dirty condenser coil. 4. Improper ventilation. 5. Defective compressor. 1. Clogged or dirty condenser coil. 2. Compressor not pumping. 3. Low refrigerant charge. 1. Compressor switch in OFF position. 2. No output on compressor and fan motor terminals on control board. 3. Failed fan motor causes high pressure cut-out to open. 1. Mineral build-up on evaporator surface. Corrective action 1. Eliminate kink and check that tube routing complies with Follett icemaker installation manual. 2. Adjust or replace control. 3. Replace complete run of ice transport tube. 4. Inspect bearings for roughness or binding and replace if necessary. 5. Replace gearmotor start relay. 6. Ensure that ice contacts bin thermostat before backing ice up in transport tube. Reference dispenser manual for proper thermostat and ice tube mounting. 1. Check for broken gearmotor output shaft or damaged gearbox. 2. Check for defective water sensor (water OK (WTR) LED remains on even when float empty or probe removed from water). 3. Purge air from line. 1. Replace defective component. 2a. Check supply and temperature of water to w/c condenser. 2b. Check discharge pressure and adjust water regulator valve. 3. Clean condenser coil. 4. Provide inlet and exhaust air provisions per Follett icemaker installation manual. 5. Replace compressor. 1. Clean condens...

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