KitchenAid KSBS25FKWH00, KSBP25FKSS00 Compressor Protection, Evaporator FAN Motor, AIR Door

Page 17

COMPRESSOR

The main control board supplies a 5 vdc, peak- to-peak square wave, at 54 to 150 Hz, to the inverter board. A standard VOM will read ap- proximately 2.5 vdc. The inverter board sup- plies the variable capacity compressor with three-phase 230 vac. Varying the frequency to the inverter board, and not the voltage, changes the speed of the compressor. The compressor can run at speeds of 1620 to 4500 rpm.

NOTE: It is not necessary, nor is it recom- mended, to test the output of the inverter board.

While the compressor is running, its speed is continuously updated. Speed is determined after analyzing two factors:

•The difference between the actual tempera- ture and the selected temperature settings.

•The rate of temperature change.

Minimum compressor speed is based on the freezer’s selected temperature setting, as shown in the following chart.

Freezer Temperature

 

Compressor

 

Setting

 

Minimum Speed

 

 

 

 

 

 

 

 

 

#1 - #5

 

1620 rpm

 

# 6

 

1800 rpm

 

# 7

 

2200 rpm

 

The compressor generally cycles on and off according to the cut-in and cut-out tempera- tures of the freezer, however, the refrigerator can turn on the compressor if the evaporator fan is at maximum speed and the refrigerator temperatures are not dropping.

COMPRESSOR PROTECTION

To protect the compressor and maintain effi- ciency, minimum compressor off time is pro- grammed into the control. When the compres- sor turns off, a minimum of 7 minutes must elapse before allowing a restart.

The inverter board utilizes a current limiting device and thermal protection that eliminates the need for a compressor mounted thermal protector.

EVAPORATOR FAN MOTOR

The evaporator fan motor is a 12 vdc, variable speed motor. The motor has four wires:

•A blue wire provides feedback to monitor the speed of the motor.

•A red wire provides a constant 12 vdc.

•A yellow wire provides a variable voltage of between 5 vdc and 17 vdc to control the motor speed from 2000 to 3000 rpm.

•A white wire provides a common return.

EVAPORATOR FAN &

AIR DOOR DELAY

After defrost, an evaporator fan delay prevents unnecessary movement of warm, moist air through the refrigerator, by chilling the evapo- rator prior to starting the fan. Immediately af- ter defrost drip time, the compressor starts at 4500 rpm, but the evaporator fan is delayed for 8 minutes. The air door remains closed for 8 minutes following defrost.

AIR DOOR

The air door is driven by a reversible DC stepper motor. The motor operates on a 12 vdc, peak-to-peak square wave. Voltage is delivered to the air door in a series of short pulses. It is not possible to obtain a reliable voltage reading with a VOM.

Separate windings are used to move the air door open or closed. The door can be in any one of 1800 positions from 0 to 90 degrees. The air door is used to fine-tune the airflow to the refrigerator.

3-3

Page 16 Page 18
Image 17
Page 16 Page 18
Contents Model Goals and Objectives ForwardTable of Contents Wiring Diagrams & Strip Circuits General Safety FirstElectrical Power Supply & Grounding Requirements Electrostatic Discharge ESD Sensitive Electronics Serial Number Model & Serial Number DesignationsModel Number Model & Serial Number Label Tech Sheet Locations KSBP25FKSS KSBS25FKBL KSBS25FKBT SpecificationsKSFS25FKBT KSFS25FKWH KitchenAid will not pay for Refrigerator WarrantyPage Adjusting The Rollers Installation InformationLeveling the Refrigerator Base Grille RemovalPage Overview Theory of OperationFreezer Temperature Control Temperature Increasing Temperature ControlFreezer Temperature Control Temperature Decreasing Refrigerator Temperature Control Temperature IncreasingCompressor Evaporator FAN AIR Door DelayCompressor Protection Evaporator FAN MotorFailure Defaults Power InterruptionAdaptive Defrost Pulsed DefrostAIR Circulation Electronic Control Thermal ShutoffFreezer Thermistor KeypadPage Component Locations Component AccessLight Shield To remove the motorized air door Removing a Thermistor Removing a Door Switch Removing a Light Socket On the next Removing the Water ReservoirUnit Compartment Cover To remove the ice maker Removing the ICE Maker Auger Motor & CRUSH/CUBE SolenoidTo remove the auger motor or crush/ cube solenoid On the next To remove the evaporator fan motor To remove the defrost heater To remove the bimetalTo remove the evaporator Reassembly NotesRemoving 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 To remove the freezer door Removing the Freezer Door Handles & Freezer DoorTo remove a door handle Disconnect the dispenser power con- nector Removing a Roller Page Thermistor Component TestingCondenser FAN Motor Voltages Compressor & InverterDefrost Heater & Bimetal Motorized AIR Door10 9 8 7 3 2 Main Control BoardICE Maker Auger Motor CRUSH/CUBE SolenoidWater Valve Solenoid Door SwitchPRE-DIAGNOSTICS Checks Diagnosis & TroubleshootingDiagnostics Mode To enter the diagnostics modeTesting The Dispenser Valve Input Diagnostics ChartTesting The Ice Maker Valve Input Water Filter Input WFI TestProblem Possible Cause Test PROCEDURE-ACTION Troubleshooting ChartPage Wiring Diagram Wiring Diagrams & Strip CircuitsCooling Circuits Strip CircuitsCompressor Condenser Fan MotorDefrost Heater Defrost CyclePage 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