Manitowoc Ice Q130 manual Safety Limit #2

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Section 5	Before Calling for Service

Safety Limit #2

Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles.

Possible Cause	Check/Correct
Improper installation	See “Installation Instructions” Section 2 of this manual
Water system	Water area (evaporator) dirty
	Water freezing behind evaporator
	Low water pressure (20 psi minimum.)
	Loss of water from sump area
	Clogged water distribution tube
	Dirty/defective water float valve
	Defective water pump
Electrical system	Ice thickness probe out of adjustment
	Ice thickness probe dirty
	Bin switch defective
	Premature harvest
Refrigeration system	Non-Manitowoc components
	Improper refrigerant charge
	Defective hot gas valve
	TXV flooding (check insulation and bulb mounting)
	Defective fan cycling control

Because there are many possible external problems,do not limit your diagnosis to only the items listed in these charts.

Part Number 000001130 12/08

5-5

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Contents Q130/Q210/Q270 UnderCounter Model Ice Machines Procedural Notices Safety NoticesRead These Before Proceeding Personal Injury PotentialTable of Contents Section Maintenance Table of Contents Section OperationSection Before Calling for Service Section General Information AccessoriesModel Numbers Q270 Models General Information Section Model/Serial Number LocationModel/Serial Number Location Ice Machine Model Number Serial NumberAuthorized Warranty Service Commercial Warranty Coverage GeneralService Calls GeneralGeneral Information Section Ice Machine Dimensions Section Installation InstructionsGeneral Q130/Q210 ICE MachinesIce Machine Heat of Rejection Installation Instructions Section Location of Ice MachineSeries Heat of Rejection Ice Machine Air Conditioning Peak Checking Ice Machine Level Section Installation Instructions Leveling the Ice MachineInstallation Instructions Section Electrical Service Water Supply Section Installation Instructions Water Service/DrainsWater Inlet Lines Drain ConnectionsTypical Water Supply Drain Installation Personal Injury Potential Installation Instructions Section Installation Checklist Component Identification OperationInitial START-UP or START-UP After Automatic SHUT-OFF Operation Section Ice Making Sequence of OperationSection Operation Energized Parts Chart Siphon System Operation Section Operational ChecksSiphon System Check Water Float Valve CheckWater Level Check Section OperationICE Bridge Thickness Check Ice Thickness CheckOperation Section Interior Cleaning and Sanitizing Section MaintenanceCleaning and Sanitizing Procedure Maintenance Section Q130 Water Distribution Tube Removal Q130 ModelsFloat Valve Removal Remove the Water Trough Remove the ice damper InstallationQ130 Q210/Q270Solution Type Water Mixed With Sanitizer Solution Type Water Mixed withRemove the Bin Door ICE Machine Inspection Exterior CleaningModel Amount of Sanitizer Air-Cooled Condenser Cleaning the CondenserWater-Cooled Condenser Water Regulating Valve SELF-CONTAINED AIR-COOLED ICE Machines Maintenance Section Removal From Service WinterizationWATER-COOLED ICE Machines Pry Open the Water Regulating ValveThis page Intentionally Left Blank Maintenance Section Checklist Section Before Calling for ServiceProblem Possible Cause To Correct Safety Limit Feature Before Calling for Service SectionSafety Limit Stand-By Mode Safety LimitsDetermining Which Safety Limit Stopped The Ice Machine Safety Limit NotesPossible Cause Check/Correct Safety Limit #1Safety Limit #2 This page Intentionally Left Blank