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P24A & P34A Service Manual
6. ELECTRICAL CONTROLS & THEIR FUNCTIONS (Cont.)
Electrical Schematic All Voltages 50-60 Hz. Part Wind Start Comp Motor Starter, FIGURE 6-4...............................6-5
Description of Control Panel Parts, Part Wind Start, TABLE 6-3 .................................................................................6-5
Electrical Schematic All Voltages 50-60 Hz. Across the Line Start Comp Motor Starter, FIGURE 6-5.......................6-6
Description of Control Panel Parts, Across the Line Start, TABLE 6-4 ........................................................................6-6
Electrical Schematic All Voltages 50-60 Hz. Soft Start Comp Motor Starter, FIGURE 6-6 .........................................6-7
Description of Control Panel Parts, Soft Start, TABLE 6-5...........................................................................................6-7
Allen Bradley Soft Start Wiring, FIGURE 6-7 ..............................................................................................................6-8
Allen Bradley Soft Start Settings and Faults, TABLE 6-6.............................................................................................6-9
Allen Bradley Soft Start Dip Switch Settings, TABLE 6-7 ...........................................................................................6-10
Preventive Maintenance.................................................................................................................................................7-1
Preventative Maintenance Form ....................................................................................................................................7-2
Ice-Making Section........................................................................................................................................................7-3
Cleaning Procedure........................................................................................................................................................7-3
Water Distributors, TABLE 7-1 ....................................................................................................................................7-4
Water Tank ....................................................................................................................................................................7-4
Water Cooled Condenser Cleaning ...............................................................................................................................7-5
Cooling Tower / Evap Condenser .................................................................................................................................7-5
Cooling Tower Maintenance Schedule, TABLE 7-3 .....................................................................................................7-6
Compressor ...................................................................................................................................................................7-6
Compressor Maintenance, TABLE 7-4 .........................................................................................................................7-7
Cutter Gear Reducer ......................................................................................................................................................7-7
V-Belt Maintenance.......................................................................................................................................................7-8
List Of Symptoms..........................................................................................................................................................8-1
Machine Stopped ...........................................................................................................................................................8-2, 8-3
Freeze-Up Due To Extended Freezing Period ...............................................................................................................8-4
Freeze-Up Due To Ice Failing To Discharge .................................................................................................................8-5
Low Ice Capacity...........................................................................................................................................................8-6, 8-7
Poor Ice Quality.............................................................................................................................................................8-7
High Discharge Pressure................................................................................................................................................8-8
Low Discharge Pressure ................................................................................................................................................8-9
High Suction Pressure....................................................................................................................................................8-9
Compressor Running Unloaded During Freeze .............................................................................................................8-9
Compressor Oil Pressure Low .......................................................................................................................................8-10
Compressor Loosing Oil Excessively ............................................................................................................................8-10
Machine Short Cycles....................................................................................................................................................8-11
Shut Down By Oil Pressure Switch ...............................................................................................................................8-11
High Compressor Discharge Temperature.....................................................................................................................8-11
Suction Line Frosting To Compressor ...........................................................................................................................8-12
12/20/12
®
, TABLE 7-2...............................................................................................................7-4
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