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Фрагмент инструкции
11 Fig. 12 11. Reconnect coupling. Press power switch ON. Ice pushes Sani-Sponges through tube (Fig. 11). 12. Place a sanitary (2 gallon or larger) container in bin or dispenser to collect Sani-Sponges and ice for 10 minutes. Collect 5.5 lbs of ice from unit. Discard ice and Sani-Sponges (Fig. 12). 12 Service Icemaker operation (all models) Follett’s icemaker consists of five distinct functional systems covered in detail as follows: • Water system • Electrical control system • Mechanical assembly • Refrigeration system • Bin full The Horizon icemaker overview The Follett Horizon icemaker uses a horizontal, cylindrical evaporator to freeze water on its inner surface. The water inlet auger compression nozzle ice transport tube Water level diagram 13 Water system The water level in the evaporator is controlled by a feed solenoid and level detecting sensors. Referencing the diagram below, water sensing rods extend down into the reservoir at the end of the evaporator assembly. The system works via electrical conductivity as follows: One of the longest probes is a common. When water is between any of the other probes and the common, the PC board will sense the activation. During normal operation, the water level rises and falls between the Normal High and Normal Low sensors. As water is consumed to make ice, the level will fall until the Normal Low sensor is exposed, triggering the water feed solenoid on. Water will fill until the Normal High sensor is activated. Note: The potable water dissolved solids content must be greater than 10 mg/l for the water control system to function properly. If using reverse osmosis water filtration system, ensure T.D.S level is greater than 10 mg/l. Alarm LO Normal HI Common Normal LO Normal operating range Water system diagram CPU CPU CPU LO WATER LO WATER LO WATER HI WATER HI WATER HI WATER DRAIN CLOG DRAIN CLOG DRAIN CLOG HI PRESS HI AMPS SERVICE PURGE CLEANING TIME DELAY REFRIG ON AUGER ON LOW BIN POWER HI PRESS HI AMPS SERVICE PURGE CLEANING TIME DELAY REFRIG ON AUGER ON LOW BIN POWER HI PRESS HI AMPS SERVICE PURGE CLEANING TIME DELAY REFRIG ON AUGER ON LOW BIN POWER making time has elapsed (1 or 2 hours), the ice machine will automatically self-flush. The compressor will shut down but the fan and gearmotor will continue to run. After the flush is complete the machine will refill and start without a time delay. Electrical system Normal control board operation The PC board indicator lights provide all the information necessary to determine the machine's status. Green indicator lights generally represent “go” or normal operation; Yellow indicators represent normal off conditions; Red indicators generally represent alarm conditions, some of which will lock the machine off. A green light labeled POWER indicates power to the machine. A flashing green light labeled CPU is normal and indicates that the Central Processing Unit “heart beat” is working. All other normal operation status indicators are covered as follows: 1. Ice machine is making ice. 1. Normal running. Ice machine disposition Operating conditions ON OFFLegend: ON or OFF FLASHING 2. Ice machine is not making ice. 2. Normal time delay. When the bin fills with ice, the LOW BIN light goes out and the refrigeration and auger drive systems immediately shut down. (Note: The fan motor will continue to run for 10 minutes to cool condenser) The TIME DELAY light comes on, initiating the time delay period. When the time delay expires, the machine will restart provided that the LOW BIN light is on. 3. Ice machine is not making ice. 3. Normal purge indicator. After a selected period of ice 14 Test points: The Horizon PC board incorporates on-board test points that can be used to determine various electrical outputs. The test point holes allow a standard probe to be inserted for quick voltage measurement. For 208-230 systems, use TP-4 (L2) as the common for testing outputs for solenoids, motors, etc. Error faults: The Horizon PC board monitors various operating parameters including high pressure, auger gearmotor amperage limits, clogged drain, and high and low water alarm conditions. There are two types of errors namely “hard” or “soft”. A hard error is one that shuts the machine off and will not allow restart until the reset button is pressed. Even cycling power will not reset a hard error. A soft error can either be automatically reset should the condition rectify, or if power is cycled. Should an error occur, consult the troubleshooting guide in this manual or a Follett service technician. Note: there are two types of LO WATER and HI AMPS errors as listed below. Soft errors: HI AMPS: The PC board monitors the amperage of the auger motor. Should the gear motor experience current draw above the 3.8 amps limit the machine will shut down and the TIME DELAY, HI AMP, and SERVICE LED’s will be illuminated. After the time delay the machine will restart and the TIME DELAY, HI AMP, and SERVICE LED’s will clear. LO WATER: During operation, t...
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