Whirlpool AD50USS, AD35DSS, AD50DSS, AD35USS, AD25BSS User Manual

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CONSUMER SERVICES TECHNICAL

EDUC

ATION GROUP PRESENTS

R-103

JOB AID

Part No. 8178563

DEHUMIDIFIERS

Models: AD25BSS, AD35DSS, AD50DSS Models: AD35USS, AD50USS, AD70USS

FORWARD

This Whirlpool Job Aid, “Dehumidifier” (Part No. 8178563), provides the technician with information on the operation and service of the Dehumidifier. For specific information on the model being serviced, refer to the “Use and Care Guide,” or “Wiring Diagram” provided with the dehumidifier.

The Wiring Diagrams used in this Job Aid are typical and should be used for training purposes only. Always use the Wiring Diagram supplied with the product when servicing the unit.

GOALS AND OBJECTIVES

The goal of this Job Aid is to provide information that will enable the service technician to properly diagnose malfunctions and repair the dehumidifier.

The objectives of this Job Aid are to:

Understand and follow proper safety precautions.

• Successfully troubleshoot and diagnose malfunctions.

• Successfully perform necessary repairs.

•

Successfully return the dehumidifier to its proper operational status.

WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our products by anyone other than Authorized Service Technicians.

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TABLE OF CONTENTS

Page

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Dehumidifier Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Model & Serial Number Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Model & Serial Number And Wiring Diagram Label Locations

. . . . . . . . . . . . . . . . . . . . . 1-3

PRODUCT OPERATION

Theory Of Operation

Dehumidifier Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Dehumidifier Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

COMPONENT ACCESS

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Removing The Cabinet

Removing The Electronic Control, Thermistor, And Power Supply Cord . . . . . . . . . . . . . .

Removing The Mechanical Humidistat, Light, And Power Supply Cord Removing The Fan Capacitor And The Fan Motor Removing The Compressor Capacitor And The Bucket Switch

COMPONENT TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Mechanical Humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Fan Capacitor & Compressor Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Bucket Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

DIAGNOSTICS & TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-4

. . . . . . . . . . . . . . 3-6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

. . . . . . . . . . . . . . . . . . . 3-10

5-2

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— NOTES —

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GENERAL

DANGER

DEHUMIDIFIER SAFETY

Your safety and the safety of others are very important.

We have provided many important safety messages in this Manual and on your appliance. Always read and obey all safety messages.

This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety alert symbol and either the word

“DANGER” or “WARNING.” These words mean:

You can be killed or seriously injured if you don’t immediately follow instructions.

You can be killed or seriously injured if you don’t follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can happen if the instructions are not followed.

1-1

MODEL & SERIAL NUMBER DESIGNATIONS

MODEL NUMBER

MODEL NUMBER AD 50 U S S 0

PRODUCT GROUP

AD = Dehumidiﬁer, Whirlpool RD = Dehumidiﬁer, Roper

CAPACITY (24 HR.)

25 Pints 35 Pints 50 Pints 70 Pints

MODEL FEATURES

B = Electromechanical, No Deicer, 1 Speed Fan C = Electromechanical, Std. Deicer, 1 Speed Fan D = Electromechanical, Std. Deicer, 2 Speed Fan U = Electronic, Ultra-Low Temp Application, 2 Speed Fan

MODEL SERIES

S = Estar B = No Estar

YEAR OF INTRODUCTION

S = 2006, T = 2007

ENGINEERING CHANGE DIGITS (0, 1, Etc.)

SERIAL NUMBER

SERIAL NUMBER Q S 21 00043

MANUFACTURING SITE

Q = LaVergne, TN

YEAR OF PRODUCTION S = 2005

WEEK OF PRODUCTION 21st Week

PRODUCT SEQUENCE NUMBER

1-2

MODEL & SERIAL NUMBER AND

WIRING DIAGRAM LABEL LOCATIONS

Model & Serial Number Label

(Behind Water Bucket)

Wiring Diagram Label

(Inside Front Half Of Cabinet)

1-3

— NOTES —

1-4

PRODUCT OPERATION

AIR

FLOW

(IN)

AIR FLOW (OUT)

SUCTION TUBE

EVAPORATO

CAPILLARY TUBE

CONDENSER

COLLECTED WATER

DISCHARGE TUBE

THEORY OF OPERATION

WHAT IS HUMIDITY?

Humidity is deﬁned as the amount of water vapor in the air and is measured as a percentage of the amount of water vapor the air can hold at a given temperature. When the amount of water vapor exceeds 100%, the moisture can no longer remain suspended in the air, usually resulting in precipitation. At levels approaching 100%, mist and fog are present.

Generally speaking, air at low temperatures has less holding capacity than air at high tem peratures. Therefore, air with 100% humidity at 45

°F has less water vapor by volume than

air with 100% humidity at 70 summer months throughout most of the country can present a problem, because warm moist air trapped inside a structure can become overly saturated with moisture. Generally, humidity levels exceeding 50% in air over 70 be uncomfortable and can cause damage to personal property.

°F. Consequently,

°F, can

REMOVING UNWANTED HUMIDITY

A dehumidiﬁer is designed to remove unwanted moisture from the air and maintain relative humidity at acceptable levels. A dehumidiﬁer does not remove all of the moisture from the air, as this is not necessary, or desirable. The dryness control on the dehumidiﬁer allows the customer to adjust a variable humidistat to control the relative humidity of room air. Once the humidistat is set to maintain acceptable humidity levels in a room, the dehumidiﬁer will

continue to maintain that level, regardless of

the ambient temperature of the air, or changes in relative humidity

A refrigeration system (see the illustration below) is used to collect the moisture. With the refrigeration system working, the evaporator is cooled to temperatures ranging from 33° - 37°F. When moisture-ladened room temperature air is drawn across the evaporator, the moisture condenses on the cold coils. The cool dry air is then drawn past the condenser. This cools the condenser and warms the air before it is recirculated into the room. The water collected on the coils of the evaporator runs off into a collection container, or a drain.

2-1

OPERATING CHARACTERISTICS

A. Light glows, indicating the bucket is full or is not in correct position. B. Adjusts amount of moisture removed from room.

A. Light glows, indicating the bucket is full or is not in correct position. B. Adjusts amount of moisture removed from room. C. Selects fan speed.

LOW TEMPERATURE OPERATION

When a dehumidiﬁer begins its run cycle, a partial frosting of the evaporator can be ob served. This temporary frosting is limited by the operating conditions of the unit. In all cases, the frost should completely disappear within 10 to 15 minutes.

In cool dry conditions, (65°F or lower temperatures, and relative humidity of 60% or less), the evaporator may become completely coated with frost or ice. Under these conditions, the evaporator temperature is reduced to below freezing (32

°F) because of inadequate heat

load, and it is possible that no moisture will be collected from the air. Mechanical control dehumidiﬁers without a deicer thermostat are not designed to operate under these condi tions, and the customer should be advised to discontinue use until proper ambient conditions are present.

TYPICAL OPERATION

The control panel (see below) provides the customer with control over the speed of the fan, (when this feature is offered), and adjustment of the amount of moisture in the air. An indicator light also provides information on the water level in the bucket, and whether the bucket is properly installed in the unit.

Mechanical control models without a deicer thermostat, i.e. AD25BSS, must not be oper

ated below 65

°F. Mechanical control models

with a deicer thermostat, i.e. AD35DSS, may be operated as low as 55°F.

Electronic control models, i.e. AD35USS, monitor the temperature of the evaporator us ing a thermistor and may be operated as low as 38°F.

When the thermistor reaches 30°F, the control begins timing. After 10 minutes at or below 30°F, the compressor is turned off. The fan continues to run for a period of 10 minutes before the compressor is restarted. This low temperature operation will continue until the

thermistor reaches 40°F for 20 minutes.

ELECTRONIC CONTROL SENSORS

The humidistat is an electronic version of

•

the mechanical humidistat. It monitors the relative humidity of the room air.

The thermistor is a device that changes re

•

sistance as the temperature changes. The electronic control monitors the resistance and operates the compressor and fan motor accordingly.

DEFECTIVE SENSOR DEFAULT

If either the thermistor or the humidistat fails on electronic control models, the control will operate in the following manner.

The compressor cycles on for 25 minutes

•

and off for 10 minutes.

•

The fan operates continuously at the set speed or High if set to Auto mode.

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FAN SPEED: Controls the fan operation, as

follows:

High: For faster moisture removal

Low: For slower moisture removal

Auto Fan Speed (Electronic Models):

Automatically sets the fan speed based on the relative humidity of the room. Low speed is used when the relative humidity is within 5% of the Desired Humidity setting. High speed is used when the relative humidity reaches or exceeds 5% of the Desired Humidity setting.

DRYNESS CONTROL: Controls the amount of moisture in the room. Set the control to the normal setting to maintain average humidity conditions. Adjust the control to a higher or lower setting for more or less drying.

When the dehumidiﬁer is ﬁrst installed, the customer may wish to set the Dryness Control to the DRYER setting to remove extra moisture from furnishings, as well as the room air.

When the humidistat senses the desired hu midity level has been reached, the control cycles off the compressor and fan motor. On electronic control models, 30 minutes after the unit cycles off at the desired relative humidity, the compressor and fan will be cycled back

on. If the relative humidity has not increased, the unit will only run for 3 minutes. There is a 3 minute minimum “on” or “off” time used to protect the compressor that requires at least 3 minutes of run time or off time before the compressor stops or restarts.

The reason for the compressor to be turned on 30 minutes after it cycles off is that when the unit cycles off, heat from the condenser and fan motor rises up toward the control. This higher temperature lowers the relative humidity around the humidistat and the unit will not run even if the relative humidity in the room is rising. This assures the room relative humidity is properly monitored. The unit will not cycle off and on when set to continuous run.

ADJUST/EMPTY BUCKET LIGHT: When this light is “ON,” it indicates that the unit is not running (see “Setting The Controls, Types 1, 2, or 3 on Pages 2-4 and 2-5). Look for the following conditions:

•

The bucket is full: Empty the bucket

and replace it in the dehumidiﬁer.

The bucket is not correctly installed

•

in the unit: Remove and replace the

bucket in the unit so that it ﬁts all the way in. Make sure the light is off, or the dehumidiﬁer will not run.

2-3

DEHUMIDIFIER USE

A. Light glows, indicating the bucket is full or is not in correct position. B. Adjusts amount of moisture removed from room

A. Light glows, indicating the bucket is full or is not in correct position. B. Adjusts amount of moisture removed from room. C. Selects fan speed.

SETTING THE CONTROLS (CONTROL TYPES 1 & 2 ONLY)

Starting/Stopping the Dehumidiﬁer

NOTE: Before turning on the dehumidiﬁer, be

sure that the bucket is empty and ﬁts all the way into the dehumidiﬁer.

Control Type 1

NOTE: Minimum operating temperature is

65ºF (18ºC).

Control Type 2

NOTE: Minimum operating temperature is

55ºF (13ºC).

Electrical Shock Hazard

Plug into a grounded 3 prong outlet.

Do not remove ground prong.

Do not use an adapter.

Do not use an extension cord.

Failure to follow these instructions can result in death, ﬁre, or electrical shock.

1. Plug into a grounded 3 prong outlet.

2. To turn on dehumidiﬁer, turn DRYNESS

CONTROL clockwise.

IMPORTANT: If the Empty/Adjust Bucket

light comes on, the dehumidiﬁer will not operate. Empty or adjust bucket.

3. To turn off dehumidiﬁer, turn DRYNESS

CONTROL counterclockwise to OFF.

Empty/Adjust Bucket Light

If this light is on, the dehumidiﬁer is not running. This light indicates that you need to check:

If the bucket is full, empty and reinstall

•

bucket.

If the bucket is not in position, remove the

•

bucket and reinstall. Make sure the bucket ﬁts all the way into the dehumidiﬁer and the light is off, or dehumidiﬁer will not run.

Fan Speed (Control Type 2 Models Only)

The Fan Speed controls fan operation

High—for faster moisture removal

•

Low—for quieter moisture removal

•

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