Taylor TW-357 Fill Solenoid Cycles On and Off, Fill Solenoid Makes Humming Noise, Display = Check

Page 42

TW-357 REV E

Fill Solenoid Cycles On and Off

KRYOS features a Freeze-Guard function whereby the valve open duration is limited, allowed to shut for a short warm-up and then opened again. To confirm or change the valve open duration:

•Select MENU, USER OPTIONS, CONTROL OPTIONS, FREEZE-GUARD OPTIONS, VALVE OPEN DURATION.

If the controller detects that the valve is stuck in the open position (i.e., continues to fill after the valve is de- energized), it will attempt to De-Ice the valve by causing a rapid cycling of the valve in an attempt to dislodge the blockage.

•To activate or de-activate this feature: Select MENU, USER OPTIONS, CONTROL OPTIONS, FREEZEGUARD OPTIONS, VALVE DE-ICING.

Repeated cycling of the solenoid valve could be attributable to moisture invasion on the controller circuit board.

1.Check gasket seals.

2.Access control board and allow time to fully dry.

Fill Solenoid Makes Humming Noise

Turn fill valve on and off using the control panel. If humming continues, it should continue to operate reliably. If the noise is excessive, replace solenoid valve.

Transformer Makes Humming Noise

This noise is a normal byproduct of most block transformers. The transformer has a non-renewable internal fuse to protect the transformer output. If the noise is excessive, replace the transformer.

Display = “Check”

The word CHECK will flash during periods of Splash-Guard protection. See page 29 for more information.

Lid Open Alarm

A lid switch is located on the front hinge. The switch lever should actuate when the hinge is opened and again when it is shut.

1.Confirm that the two spade connectors are connected to the back of the switch. They should be attached to the “G” and the “N/C” connections.

2.The switch can be bumped or moved during shipment. Adjust switch up until closed hinge will actuate switch lever.

QCF (Quick Chill Feature) Will Not Operate

See LID OPEN ALARM

To activate or adjust times: Select MENU, USER OPTIONS, CONTROL OPTIONS, LID/DEFOG SETTINGS, QUICK CHILL.

42

Image 42

Contents Labs TW-357 REV E Installation Table of ContentsKeep Equipment Area Well Ventilated Safety Precautions for Liquid NitrogenExtreme Cold Cover Eyes and Exposed Skin Liquid Nitrogen SystemFreight Damage Precautions Dispose of Waste Liquid Nitrogen SafelyElectrical General Information Text Format NotationLabs Cryostorage Specifications Kryos Specifications Liquid Nitrogen Supply Connection InstallationUnpacking and Inspection Repackaging for ShipmentPower Supply Connection Kryos Control Field InstallationOperation Initial FillSensor Assembly Control ComponentsInterface Panel Remote Alarm Lid SwitchBattery Backup Solenoid ValveLiquid Phase Storage Operating ParametersAdding an Inventory Control System Thermocouple PositioningRacks are not Square Orientation is Important Inventory Control System Layouts Labs Cryostorage SystemLABS-80K LABS-40K Fenwal 4R59953 Blood Bag Rack Arrangements Fenwal 4R5462 9955 Blood Bag Rack Arrangements Introduction PowerControl Operation Normal Fill CycleMain Display Screen Menu SystemHigh Temperature 4.1 Valve Open Test Temperature System Temperature Thermocouple SelectCalibrate Temperature Help ScreensAlarms and Error Conditions Sensor TypeSystem Alarms Test AlarmsLogging Error Logs Dump LogsErase Logs Temperature LogsSystem Logs SecurityTemperature Control Settings Lid Switch SetupControl By Temperature Control TemperatureSerial Communications and RS-232 Settings User Access LogsTime and Date Set Valve Monitoring Control RangeFreeze-Guard Options Valve Open DurationDisplay Brightness Control On Battery Backup VersionSolenoid Valve About this ControlBattery Life Interface SoftwareMaintenance Strainer Cleaning InstructionsDefrosting Your LAB-Series CryoStorage System Cleaning Your Taylor-Wharton CryoStorage System Making Adjustments to the Labs Kryos Sensor Assembly Offset Value Default Start Fill / Stop Fill Default Auto DefogKryos Kryos V9.0 & Kryos V9.0B Level Readings Units of measureRemoving/Installing the Solenoid Valve Ohms to 18 K ohmsSensor Plug Schematic Pin View SchematicsLabs Plumbing Assembly Plumbing AssemblyController Will Not Turn on TroubleshootingSymptoms Indicates High Liquid LevelTemperature reading 10 to 20 degrees warm Indicates Low LN2 SupplyIndicates Open Sensor Fill Solenoid Cycles On and Off Lid Open AlarmQCF Quick Chill Feature Will Not Operate Fill Solenoid Makes Humming NoisePush Buttons Will Not Respond Defog Feature Will Not OperatePower Failure Alarm Liquid Level Readout is IncorrectFactory Settings Replacement Parts Level Controller Electrical/Mechanical Parts80K/40K/20KTaylor-Wharton Technical Services. Phone 800-898-2657 Fax Harsco Corporation