86 Part Number STH038 5/12SAFETY LIMIT #1Freeze time exceeds 60 minutes for 6 consecutivefreeze cycles.Possible cause listWater System• Loss of water from sump area• Low water pressure 1.37 bar min (20 psig)• High water pressure 5.51 bar max (80 psig)• High water temperature 32°C max (90°F)• Clogged water distribution tube• Dirty/defective water fill valve• Dirty/defective water dump valve• Defective water pump• Dirty/defective water level probeElectrical System• Low incoming voltage• Ice thickness probe out of adjustment• Harvest cycle not initiated electrically• Contactor not energizing• Compressor electrically non-operational• Defective fan cycling control• Defective fan motorMiscellaneous• High inlet air temperature• Condenser discharge air recirculation• Restricted air flow/dirty condenser fins• Defective harvest valve• Non-Manitowoc components• Improper refrigerant charge• Defective compressor• TXV starving or flooding (check bulb mounting)• Non-condensable in refrigeration system• Plugged or restricted high side refrigerant lines orcomponent
