Whirlpool AD35USS, AD50DSS, AD70USS, AD50USS Component Testing, Mechanical Humidistat FAN Capacitor

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COMPONENT TESTING

Before testing any of the components, per- form the following checks:

•The most common cause for control failure is corrosion on connectors. Therefore, dis- connecting and reconnecting wires will be necessary throughout test procedures.

•All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms-per-volt DC, or greater.

•Check all connections before replacing components, looking for broken or loose wires, failed terminals, or wires not pressed into connectors far enough.

•Resistance checks must be made with power cord unplugged from outlet, and with wiring harness or connectors discon-

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

MECHANICAL HUMIDISTAT

FAN CAPACITOR &

Control

Terminals

COMPRESSOR CAPACITOR

 

 

Refer to page 3-6 for the procedure for ac- cessing the mechanical humidistat.

1.Unplug dehumidifier or disconnect power.

2.Disconnect the two wires from the hu- midistat terminals.

3.Turn the humidistat control fully counter- clockwise.

4.Set the ohmmeter to the R x 1 scale.

5.Touch the ohmmeter test leads to the hu- midistat terminals. The meter should indi- cate an open circuit (infinite).

6.Turn the humidistat control clockwise un- til you hear it click. The meter should in- dicate a closed circuit (0 Ω).

Refer to pages 3-8 and 3-10 for the proce- dures for accessing the fan capacitor and the compressor capacitor.

1.Unplug dehumidifier or disconnect power.

2.IMPORTANT: Discharge the capacitor by touching the leads of a 20,000 ohm resis- tor to the capacitor terminals.

3.Disconnect the wires from the capacitor terminals.

4.Set the ohmmeter to the R x 1K scale.

5.Touch the ohmmeter test leads to the ca- pacitor terminals. The meter should indi- cate several ohms, and gradually return to infinity.

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Contents Models AD25BSS, AD35DSS, AD50DSS DehumidifiersGoals and Objectives ForwardTable of Contents Page General Dehumidifier SafetyYou can be killed or seriously injured if you don’t Immediately follow instructionsModel Number Model & Serial Number DesignationsSerial Number AD = Dehumidifier, Whirlpool RD = Dehumidifier, RoperModel & Serial Number Wiring Diagram Label Locations Page Product Operation What is HUMIDITY?Theory of Operation Removing Unwanted HumidityTypical Operation Operating CharacteristicsPage Dehumidifier USE Empty/Adjust Bucket LightStarting/Stopping the Dehumidifier Control Type Fan Speed Control Type 2 Models OnlyFan Speed Control Type 3 Models Only Dryness ControlStarting/Stopping the Dehumidifier Desired Humidity Control Type 3 Models Only Draining the DehumidifierOption 2-Connect Drain Hose Normal SoundsDehumidifier Care Cleaning the AIR Filter on Some ModelsCleaning the Dehumidifier Component Locations Component AccessRemoving the Cabinet Top Rear Screws Rear Half Front Half Bottom Rear Screw Remove the two hex-head screws from the electronic control Thermistor & Clip Ground Wire Screw To remove the light To remove the mechanical humidistatTo remove the power supply cord To remove the fan motor Removing the FAN Capacitor and the FAN MotorTo remove the fan capacitor see the top right photo Top green ground wire on condenser To remove the compressor capacitor Removing the Compressor Capacitor and the Bucket SwitchMechanical Models To remove the bucket switch Electronic ModelPage Mechanical Humidistat FAN Capacitor Component TestingFAN Motor Bucket SwitchDiagnostics Diagnostics & TroubleshootingProblem Cause Correction TroubleshootingWiring Diagram Wiring DiagramsWiring Diagram Wiring Diagram Page Page Page For Technical Assistance While AT the CUSTOMER’S Home Call Product Specifications Warranty Information SourcesFor Technical Information and Service Pointers Corporation
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