KitchenAid KSBS25FKBT00 Adaptive Defrost, Pulsed Defrost, Power Interruption, Failure Defaults

Page 18

The refrigerator temperature determines the opening of the air door. When the refrigerator requires cooling, if the evaporator fan motor is already running for the freezer, the air door partially opens, and then adjusts, if necessary. While the refrigerator is cooling, the door will be adjusting continuously to maintain or re- cover refrigerator temperature.

ADAPTIVE DEFROST

The adaptive defrost control allows the unit to enter a defrost mode only when it is needed. When powered up for the first time, the control initiates a defrost cycle after 8 hours of com- pressor run time. By monitoring the duration of defrost heating time and compressor run time, the control will continuously adapt the time between defrosts to optimize efficiency. Time between defrost periods will vary between 8 and 100+ hours.

Defrost will occur immediately when the com- pressor has run at 4000 rpm or greater for 1 hour, and 8 hours have elapsed since the last defrost.

PULSED DEFROST

For the first 7 minutes of defrost, the heater is on continuously. It will then cycle off for 1 minute, and back on for 2 minutes. The heater will continue to cycle at this ratio until the bimetal opens, or until 33 minutes has elapsed. At this point, heat is discontinued, and a 4-minute “drip time” begins. This allows the water to drain before the unit returns to a cooling mode. Maximum defrost time, (pulsed heat on/off time + drip time) is 37 minutes.

When entering a defrost cycle, if the bimetal is open, the time to defrost is reset to 8 hours, and the control will time through the entire 37 minute defrost period. During diagnostics this will al- low a technician time to look for heater opera- tion, and if necessary, bypass the bimetal.

POWER INTERRUPTION

After a power interruption, the following events will occur:

•The unit returns to the same operating mode and settings in use prior to the power inter- ruption. If the unit was off, it remains off.

•Initially, the compressor, evaporator fan, and condenser fan motors will be off.

•The air door will close, and then adjust to the proper opening. The evaporator fan starts when the air door opens.

•The adaptive defrost control resets the com-

pressor run time counter to 0, and if the freezer is above 20°F, the time to defrost is set to 8 hours.

•If the freezer temperature is below 12°F, the

compressor starts after a delay of 7 minutes. If the freezer temperature is above 12°F, the compressor starts immediately.

FAILURE DEFAULTS

In the event of a thermistor, or keypad failure, the control uses one of the following default modes, which will continue until the failure is corrected.

Refrigerator Thermistor

If the control senses an open or a shorted thermistor, the air door and the evaporator fan motor will begin to operate on a timed on and off cycle, based on current selected tempera- ture settings. The evaporator fan motor will run when the air door is open.

At mid-settings of 37°F / 0°F, the air door will open for 16 minutes, and close for 30 minutes. Setting the freezer colder, or the refrigerator warmer, will reduce the door-open time. Set- ting the freezer warmer, or the refrigerator colder, will increase the door-open time.

3-4

Page 17 Page 19
Image 18
Page 17 Page 19
Contents Model Forward Goals and ObjectivesTable of Contents Wiring Diagrams & Strip Circuits Safety First Electrical Power Supply & Grounding RequirementsGeneral Electrostatic Discharge ESD Sensitive Electronics Model & Serial Number Designations Model NumberSerial Number Model & Serial Number Label Tech Sheet Locations Specifications KSBP25FKSS KSBS25FKBL KSBS25FKBTKSFS25FKBT KSFS25FKWH Refrigerator Warranty KitchenAid will not pay forPage Leveling the Refrigerator Installation InformationAdjusting The Rollers Base Grille RemovalPage Theory of Operation OverviewFreezer Temperature Control Temperature Decreasing Temperature ControlFreezer Temperature Control Temperature Increasing Refrigerator Temperature Control Temperature IncreasingCompressor Protection Evaporator FAN AIR Door DelayCompressor Evaporator FAN MotorAdaptive Defrost Power InterruptionFailure Defaults Pulsed DefrostFreezer Thermistor Electronic Control Thermal ShutoffAIR Circulation KeypadPage Component Access Component LocationsLight Shield To remove the motorized air door Removing a Thermistor Removing a Door Switch Removing a Light Socket Removing the Water Reservoir On the nextUnit Compartment Cover Removing the ICE Maker Auger Motor & CRUSH/CUBE Solenoid To remove the ice makerTo remove the auger motor or crush/ cube solenoid On the next To remove the evaporator fan motor To remove the bimetal To remove the defrost heaterReassembly Notes To remove the evaporatorRemoving the Condenser FAN Motor Removing the Compressor Removing the Inverter Assembly Removing the Main Control Board Assembly Electrical Shock Hazard Removing the Water Dispenser Fill Tube Wire Connectors & Ground Wire Removing the Water Valve Removing the Freezer Door Handles & Freezer Door To remove a door handleTo remove the freezer door Disconnect the dispenser power con- nector Removing a Roller Page Component Testing ThermistorCondenser FAN Motor Compressor & Inverter VoltagesMotorized AIR Door Defrost Heater & BimetalMain Control Board 10 9 8 7 3 2CRUSH/CUBE Solenoid ICE Maker Auger MotorDoor Switch Water Valve SolenoidDiagnostics Mode Diagnosis & TroubleshootingPRE-DIAGNOSTICS Checks To enter the diagnostics modeTesting The Ice Maker Valve Input Diagnostics ChartTesting The Dispenser Valve Input Water Filter Input WFI TestTroubleshooting Chart Problem Possible Cause Test PROCEDURE-ACTIONPage Wiring Diagrams & Strip Circuits Wiring DiagramCompressor Strip CircuitsCooling Circuits Condenser Fan MotorDefrost Cycle Defrost HeaterPage Product Specifications Warranty Information Sources

KSFS25FKBT00, KSFS25FKWH00, KSBS25FKBL00, KSBS25FKBT00, KSBS25FKWH00 specifications

The KitchenAid appliances KSCS25FKSS00, KSFS25FKBL00, KSBP25FKSS00, KSBS25FKWH00, and KSBS25FKBT00 represent a blend of innovative technology and elegant design, catering to the needs of modern kitchens. Each of these models brings unique features and functionalities that enhance convenience, efficiency, and style.

The KSCS25FKSS00 refrigerator is known for its spacious interior and flexible storage solutions. It includes adjustable shelves and a fresh-seal crisper that keeps fruits and vegetables fresher for longer. The exterior has a sleek stainless-steel finish that not only looks great but is also resistant to fingerprints, making cleaning a breeze.

Moving to the KSFS25FKBL00, this model emphasizes energy efficiency, showcasing Energy Star certification. A standout feature is its ice and water dispenser, providing easy access to chilled water and ice without opening the fridge. The temperature management system ensures that food stays at optimal temperatures, which helps in preserving the flavors and nutrients.

The KSBP25FKSS00, a powerful blender, is designed to meet the demands of diverse culinary tasks. With its high-performance motor and multiple speed settings, it easily blends, pulses, and crushes a variety of ingredients. The patented diamond blending system ensures consistent results, while the sleek design and sturdy base offer stability during operation.

The KSBS25FKWH00 and KSBS25FKBT00 models are side-by-side refrigerators featuring advanced cooling technologies. The Even-Heat temperature management system evenly distributes cold air, preventing warm spots and maintaining an ideal environment for storing perishables. The intuitive control panel allows users to adjust settings with ease, while bright LED lighting illuminates the interior, making it easy to see contents.

Both KSBS25FKWH00 and KSBS25FKBT00 come equipped with ample door storage and a separate dedicated space for deli meats, further enhancing organization within the fridge. Their stylish finish complements any kitchen style, offering a combination of functionality and aesthetic appeal.

Overall, the KitchenAid KSCS25FKSS00, KSFS25FKBL00, KSBP25FKSS00, KSBS25FKWH00, and KSBS25FKBT00 models demonstrate the brand’s commitment to innovation, quality, and efficient kitchen solutions. Whether you need refrigeration, blending, or both, these appliances offer an exceptional blend of features to enhance your culinary experience.
Top Page Image Contents