Vogt P18AL TUBE-ICE, Service Manual

Page: 9 / 88

P18AL Service Manual
TABLE OF CONTENTS
3/6/07
iii
Optional Maintenance Operations .................................................................................................................................7-5
Water Cooled Condenser Cleaning..........................................................................................................................7-5
Cooling Tower/Evaporative Condenser...................................................................................................................7-6
Compressor..............................................................................................................................................................7-7
8. TROUBLESHOOTING
List Of Symptoms..........................................................................................................................................................8-1
Machine Stopped ...........................................................................................................................................................8-2 & 8-3
Freeze-Up Due To Ice Failing To Discharge.................................................................................................................8-3
Low Ice Capacity...........................................................................................................................................................8-4
Poor Ice Quality.............................................................................................................................................................8-5
High Discharge Pressure (Check Gage Accuracy) ........................................................................................................8-5
Low Discharge Pressure (Check Gage Accuracy) .........................................................................................................8-5
High Suction Pressure (Check Gage Accuracy) ............................................................................................................8-6
Compressor Running Unloaded During Freeze (Dedicated Compressor Only) ............................................................8-6
Compressor Oil Pressure Low (Check Gage Accuracy) ................................................................................................8-6
Compressor Loosing Oil Excessively ............................................................................................................................8-6
Machine Short Cycles (Using Freeze Pressure Switch (FPS) Only)..............................................................................8-7
High Compressor Discharge Temperature.....................................................................................................................8-7
Suction Line Frosting To Compressor ...........................................................................................................................8-7
9. SERVICE OPERATIONS
Thawing Timer (T), FIGURE 9-1..................................................................................................................................9-1
Freeze Timer (T2)..........................................................................................................................................................9-1
Digital Timer Setting Procedure ....................................................................................................................................9-1
Multi-function Digital Freezer Timer, FIGURE 9-2......................................................................................................9-2
Conveyor Timer (T3).....................................................................................................................................................9-2
Flush Valve Timer (T4) .................................................................................................................................................9-2
Make-up Water Float Valve (37A) ................................................................................................................................9-3
Refrigerant Float Switch (23) ........................................................................................................................................9-3
Hand Expansion Valve (9).............................................................................................................................................9-3
Solenoid Valves (18, 25) ...............................................................................................................................................9-3
Control Circuit Protection (CB1)...................................................................................................................................9-3
Cutter Motor (3) / Gear Reducer (4) ..............................................................................................................................9-3
Circulating Water Pump ................................................................................................................................................9-4
Pumpdown 9-4
Pumpdown Procedure ....................................................................................................................................................9-4
Removal of Ammonia Refrigerant.................................................................................................................................9-5
Refrigerant Leaks ..........................................................................................................................................................9-5
Non-condensable Gases.................................................................................................................................................9-6
Purging Non-condensable Gases ...................................................................................................................................9-6
Page No.
Purging Procedure (Non-condensable Gases)................................................................................................................9-6
Draining the Oil Trap ....................................................................................................................................................9-7
Oil Trap Draining Procedure .........................................................................................................................................9-7