Maytag ATB1935HRW & Q Bedienungsanleitung

This manual is to be used by qualified appliance

technicians only. Maytag does not assume any

responsibility for property damage or personal

injury for improper service procedures done by

an unqualified person.

16021832

Revision 0

August 2002

Service

Service Manual for Amana® models

This Manual covers 19,21 u. Ft.

Top Mount Refrigerators

See page i for model listings

19 & 21 Cu. Ft.

Top Mount

Refrigerators

2002 Maytag Corporation



SAFETY PRECAUTIONS

THIS MANUAL, AS WELL AS THE INFORMATION CONTAINED IN IT, IS TO BE USED

ONLY BY A MAYTAG AUTHORIZED SERVICE TECHNICIAN FAMILIAR WITH AND

KNOWLEDGEABLE OF PROPER SAFETY AND SERVICING PROCEDURES AND POS-

SESSING HIGH QUALITY TESTING EQUIPMENT ASSOCIATED WITH MICROWAVE,

GAS, AND ELECTRICAL APPLIANCE REPAIR.

ALL INDIVIDUALS WHO ATTEMPT REPAIRS BY IMPROPER MEANS OR ADJUST-

MENTS, SUBJECT THEMSELVES AND OTHERS TO THE RISK OF SERIOUS OR FATAL

INJURY.

USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTS.

Safety Precautions

2002 Maytag Corporation

INTRODUCTION

This refrigeration service manual provides the information necessary to service Top

Mount model refrigerators.

NOTE: ALL MODELS COVERED IN THIS SERVICE MANUAL USE R1 4A REFRIG-

ERANT

The manual is printed in loose leaf format. Each part of this manual is divided into

sections relating to a general group of components and each section is subdivided into

various parts describing a particular component or service procedure.

The subdividing of the subject matter plus the loose leaf form will facilitate the updating

of the manual as new models and new or revised components of service procedures are

introduced.

Each page of this manual will be identified in the lower right hand corner. As new or

revised pages are published, it will be easy to keep the manual up to date.

This service manual is a valuable service tool and care should be taken to keep it up to

date by prompt and proper filing of subsequent pages as they are issued.

The following models are covered in this service manual:

INTRODUCTION i

Continued...

AMA A

ATB1935HRW & Q

ATB2135HRW & Q

2002 Maytag Corporation



INTRODUCTION ii

2002 Maytag Corporation

CONTENTS

SECTION 1. GENERAL INFORMATION................................................. 1-1

Electrical Requirements .................................................................................................. 1-1

Forced Air ....................................................................................................................... 1-2

Checking Operation ........................................................................................................ 1-3

Tools eeded For Sealed System Repair ....................................................................... 1-5

Refrigeration System ....................................................................................................... 1-8

Diagnosis ..................................................................................................................... 1-10

Components ................................................................................................................. 1-13

System Flush Procedure ............................................................................................. 1-16

Sweep And Final Charge ............................................................................................ 1-19

SECTION 2. COMPONENTS ..................................................................2-1

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

Condenser ..................................................................................................................... 2-2

ELECTRICAL SYSTEM ................................................................................................... 2-4

Testing The Compressor Direct ............................................................................. 2-4

Overload Protector ................................................................................................. 2-5

PTC Starting Device & Run Capacitor ........................................................................... 2-6

Run Capacitor ................................................................................................................ 2-7

Temperature Control ..................................................................................................... 2-8

Auto Damper Control .................................................................................................. 2-10

Defrost Timer ............................................................................................................... 2-13

Defrost Heater And Thermostat ..................................................................................... 2-14

Condenser Fan Motor ................................................................................................. 2-17

Freezer Fan Motor ....................................................................................................... 2-18

SECTION 3. CABINET AND RELATED COMPONENTS ......................3-1

FOOD LI ER .................................................................................................................. 3-1

COMPARTME T ACCESSORIES/MOU TI G HARDWARE ........................................ 3-1

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

Freezer Shelves...................................................................................................... 3-1

Cantilever (Fresh Food) Shelves ........................................................................... 3-1

Cantilever Shelf Trim ............................................................................................. 3-2

Crisper Shelves ...................................................................................................... 3-2

Refrigerator Meat Keeper ...................................................................................... 3-2

Freezer Cold Controls ............................................................................................... 3-4

REPLACI G THE FREEZER CO TROL ACTUATOR ARM A D TAPE ......................... 3-5

MOU TI G HARDWARE ............................................................................................... 3-5

ylon Snap uts ....................................................................................................... 3-5

Water Drain Systems ................................................................................................ 3-6

CABI ET DOORS A D ASSOCIATED PARTS .............................................................. 3-6

Paint Touch-Up ......................................................................................................... 3-6

CONTENTS iii

2002 Maytag Corporation



Outer Door Panel ..................................................................................................... 3-7

Cabinet Wheels ....................................................................................................... 3-8

Cabinet Leveling...................................................................................................... 3-8

Door Seal ................................................................................................................ 3-9

Door Alignment ...................................................................................................... 3-10

Door Switch......................................................................................................... 3-10

SECTION 4. ICE MAKER ...................................................................... 4-1

Servicing ..................................................................................................................... 4-1

Accessing The Control Box ....................................................................................... 4-2

Service Procedures .................................................................................................... 4-2

Water Fill Adjustments ............................................................................................... 4-4

Water Problems .......................................................................................................... 4-5

Thermostat ................................................................................................................. 4-5

Shut-Off Arm .............................................................................................................. 4-6

Harness ....................................................................................................................... 4-6

Leveling Of Ice Maker ................................................................................................ 4-7

Removing Fill Cup ...................................................................................................... 4-7

Other Information ....................................................................................................... 4-8

SECTION 5. TROUBLESHOOTING...................................................... 5-1

SECTION 6. SPECIFICATIONS ............................................................ 6-1

TOP MOUNT

19 CUBIC FT (AUTO DAMPER) .................................................................................. 6-2

21 CUBIC FT (AUTO DAMPER) .................................................................................. 6-3

SECTION 7. SCHEMATICS ................................................................... 7-1

Dual Slide Control Models ..................................................................................7-2- 7-4

Contents iv

2002 Maytag Corporation

SECTION 1. GENERAL INFORMATION

s WARNING

Per onal Injury Hazard

Electrical ground is required on this

appliance.

SECTION 1. ENERAL INFORMATION 1-1

INSTRUCTIONS -

ELECTRICAL REQUIREMENTS

Per onal Injury Hazard

s WARNING

Do not under any circumstances

remove the grounding prong from

the power supply cord.

s WARNING

Per onal Injury Hazard

GROUNDING INSTRUCTIONS:

This appliance is equipped with a power

supply cord having a 3-prong grounding

plug. For your safety, this cord must be

plugged into a mating 3-prong type wall

receptacle which is properly wire ,

groun e an polarize .

If a mating wall receptacle is not avail-

able. Contact a qualified electrician to

have the wall receptacle replaced. Do

not use an AC adapter plug. If there is

any question, local building officials or

electrical utility should be consulted

To prevent unnecessary risk of fire,

electrical shock or personal injury, all

wiring and grounding must be done

in accordance with National Electrical

Code and local codes and ordinances.

It is the personal responsibility and

obligation of the appliance owner to

provide adequate electrical service

for this appliance.

IMPORTANT SAFETY

PRECAUTIONS:

Electrical Service

Grounding: 120 VOLTS, 60Hz Only

Observe all electrical co es an local

co es an or inances.

A 120 volt 60 Hz, 15 ampere fused electri-

cal supply is required. An individual

branch (or separate circuit serving only

this appliance is recommended.)

Do not use extension cord .

Before plugging in power cor , oper-

ating or testing, follow groun ing

instructions in Groun ing Section.

2002 Maytag Corporation



1-2 SECTION 1. ENERAL INFORMATION

FORCED AIR SYSTEMS

On all forced air models, an air circulating

fan draws air from around the evaporator

and directs it to the fresh food and freezer

compartments. A carefully measured

amount of chilled air is directed into the

fresh food compartment through a baffle

to maintain the desired fresh food com-

partment temperature. The greater part

of chilled air is directed into the freezer

compartment to maintain freezer tem-

perature. Forced air models use a fan

cooled condenser. The evaporator is

automatically defrosted every eight or ten

hours of compressor run time depending

on the model. Defrosting is accom-

plished by a defrost heater activated by a

timer. The accumulated moisture is

drained into a defrost pan located in the

compressor area of the cabinet.

AIR FLOW - FORCED AIR SYSTEMS

The balance between air flow into the

fresh food and freezer compartments is

an important factor in maintaining proper

compartment temperatures in a forced air

refrigeration system. A baffle is used to

regulate the amount of chilled air directed

into the fresh food compartment. If a

colder freezer compartment temperature

is desired, the baffle is adjusted so that

less air is directed into the fresh food

compartment. This causes the compres-

sor to run longer since the thermostat

sensing element is located in the fresh

food compartment. Cold air is drawn

through the fin and tube evaporator and

into the fan. A portion of the air is de-

flected into the fresh food compartment

where it absorbs heat and returns to the

fin and tube evaporator through the

2002 Maytag Corporation

SECTION 1. ENERAL INFORMATION 1-

return opening in the back center of the

fresh food, freezer divider. Most of the air

moving through the fin and tube evapora-

tor, however, is blown through the freezer

air tunnel and circulated throughout the

freezer compartment and back across the

fin and tube evaporator where it starts

another cycle.

CHECKING OPERATION

The following general information ex-

plains several methods for checking

operation of the refrigeration system.

This information applies to all systems

covered in this manual. The correct

operation of a refrigeration system is

dependent upon the proper functioning

of each of the parts comprising the sys-

tem.

If the system does not operate properly

(long run periods, warmer than normal

temperatures), the trouble may be caused

by one of the following conditions:

(1) - Restricte Capillary Tube

The opening of a capillary tube is about

the same diameter as the period at the

end of this sentence. This should indi-

cate that it doesn't take much to restrict

this tube. It should also tell you to use

care when any service procedures in-

volve moving or touching the capillary

tube. A very slight kink can cause a

complete restriction of the tube.

Restrictions of the capillary tube may be

caused by: (1) moisture freeze-up, (2)

foreign particles lodged in the tube, or (3)

a bend or kink.

If the capillary tube is restricted, there will

be a noticeable lack of frost on all of the

cooling surface; the compressor may

operate for a short period of time and

cycle on the overload. Because some

models can hold the entire charge in the

condenser, the compressor may run

continuously and definite vacuum will be

noticed in the low side. When moisture

freeze-up causes a restriction, it usually

occurs at the outlet end of the capillary

tube. ormally, frost buildup can be

detected in this area.

At the discharge end of the capillary,

apply heat. (NOTE: When using a heat

gun or hair ryer, use low heat.) If there

is enough head pressure, and if the re-

striction is caused by moisture freeze-up,

you will be able to hear a gurgling noise

as the heat releases the refrigerant

through the tubing.

It is possible that this moisture will be

absorbed by the drier and remedy the

trouble. However, if the freeze-up reoc-

curs, you must replace the drier.

A kink in the capillary tube will reveal

about the same symptom as a moisture

freeze-up except for the accumulation of

frost. Check the capillary tube in areas

that are possible, and straighten the kink

to relieve the restrictions. Check the unit

operation to see if you have helped the

situation. If the trouble persists, replace

the defective part. If the freeze-up condi-

tion does not exit and there is not a kink,

you can assume that a foreign particle is

causing the restrictions. The only rem-

edy in this case is to replace the re-

stricted part.

2002 Maytag Corporation



1- 4 SECTION 1. ENERAL INFORMATION

(2) - Partial Restriction In Low Si e

Tubing

Bent tubing, foreign matter, or moisture

in the system may cause a partial restric-

tion in the low side tubing. This is usually

indicated by frost-free tubing between

the restriction and the capillary tube and

by frost-covered tubing between the

restriction and the suction line. The

restriction acts like a second capillary

tube, increasing the pressure ahead of it

(warming) and decreasing the pressure

beyond it (cooling). To confirm the exist-

ence of a restriction in the low side tub-

ing, perform operational pressure checks.

(3) - Slow Leak In System

On forced air models, long run time will

be noticed during the early stages of a

leak. As the refrigerant continues to

escape, both compartments will gradually

warm up and the compressor will run

continuously. The freezer will probably

warm up first.

(4) - Incorrect Refrigerant Charge

The sealed unit may have too much

refrigerant (overcharged system) or too

little refrigerant (undercharged system).

The paragraphs below will inform you on

how to recognize a system with these

defects.

An overcharged system may have a frost

back condition appearing outside the

insulation sleeve on the suction line at the

cabinet rear. When the compressor

stops, the frost melts and drips on the

floor. A heat exchanger separation will

also cause this symptom.

An undercharged system depending on

the degree of undercharge, will operate

with temperatures above normal and the

compressor run time will be increased.

The greater the undercharge, the higher

the temperature will be and the longer

the run time.

An undercharged system must be

purged, evacuated, and recharged with

the proper amount of refrigerant. Before

recharging, however, test for refrigerant

leaks.

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