Amana AAC051FRB User manual

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Room
Air Conditioners
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
not limited to the following:
Amana
AAC051FRB
Service
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.
16022379
July2003

2 16022379 Rev. 0 ©2003 Maytag Appliances Company
Pride and workmanship go into every product to provide our customers with quality products. It is possible,
however, that during its lifetime a product may require service. Products should be serviced only by a qualified
service technician who is familiar with the safety procedures required in the repair and who is equipped with the
proper tools,parts,testinginstrumentsandtheappropriateservicemanual. REVIEWALLSERVICEINFORMATION
IN THE APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
Important Notices for Consumers and Servicers
!WARNING
To avoid risk of serious injury or death, repairs should not be attempted by unauthorized personnel, dangerous
conditions (such as exposure to electrical shock) may result.
Maytag will not be responsible for any injury or property damage from improper service procedures. If performing
service on your own product, assume responsibility for any personal injury or property damage which may result.
Tolocateanauthorizedservicer,pleaseconsult your telephone book or thedealerfromwhomyoupurchasedthis
product. For further assistance, please contact:
MAYTAG APPLIANCES SALES COMPANY OR U.S. and Canada 1-800-462-9824
ATTN:Maytag CAIR® Center CALL U.S.customersusingTTYfordeaf,hearing
P.O. Box 2370 impaired, call 1-800-688-2080
Cleveland, TN 37320-2370
If outside the United States contact:
MAYTAG APPLIANCES SALES COMPANY
ATTN: Maytag CAIR®Center
P.O. Box 2370
Cleveland, TN 37320-2370
Telephone: [phone]
Recognize Safety Symbols, Words, and Labels
DANGER
!
DANGER—Immediate hazards which WILL result in severe personal injury or death.
WARNING
!
WARNING—Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION
!
CAUTION—Hazards or unsafe practices which COULD result in minor personal injury or product or property
damage.
Important Information
CAUTION
!

©2003 Maytag Appliances Company 16022379 Rev. 0 3
Important Safety Information
General Information
This Service Manual describes the operation,
disassembly, troubleshooting, and repair ofAmana
RoomAir Conditioners. It is intended for use by
authorized servicers who troubleshoot and repair these
units.
NOTE: It is assumed that users of this manual are
familiar with the use of tools and equipment used
to troubleshoot and repair electrical, mechanical,
and refrigeration systems; and understand the
terminology used to describe and discuss them.
Maytag urges you read and follow all safety precautions
and warnings contained in this manual. Failure to comply
with safety information may result in severe personal
injury or death.
Related Publications
This is a base service manual, covering a range of
similar models. It is intended to be used in conjunction
with the Parts Manual and Technical Sheet covering
specific model being serviced.
General Precautions and Warnings
WARNING
!
To avoid risk of personal injury or death due to electrical
shock, disconnect electrical power to unit before
attempting to service the unit.
WARNING
!
To avoid risk of personal injury or death due to electrical
shock, DO NOT, under any circumstances, alter the
grounding plug. Air conditioner must be grounded at all
times. Do not remove warning tag from power cord. If a
two-prong (non-grounding) wall receptacle is
encountered, contact a qualified electrician and have
the receptacle replaced with a properly grounded wall
receptacle in accordance with the National Electrical
Code.
WARNING
!
To avoid risk of personal injury or death due to electrical
shock, grounding wires and wires colored like grounding
wires are NOT to be used as current carrying
conductors. The standard accepted color coding for
ground wires is green or green with a yellow stripe.
Electrical components such as the compressor and fan
motor are grounded through an individual wire attached
to the electrical component and to another part of the air
conditioner. Grounding wires should not be removed
from individual components while servicing, unless the
component is to be removed and replaced. It is
extremely important to replace all removed grounding
wires before completing service.
WARNING
!
To avoid risk of heat exposure, which may cause death
or severe illness, air conditioner must be monitored
when malfunctions or shuts down.

4 16022379 Rev. 0 ©2003 Maytag Appliances Company
Important Information .................................................. 2
Important Safety Information ........................................ 3
ProductIdentification .................................................... 5
Troubleshooting Information ......................................... 6
Testing Procedures..................................................... 13
Low Voltage...........................................................13
High Voltage......................................................... 13
Testing Capacitors................................................ 13
Checking Overload Protectors ............................. 13
Checking Compressor Windings.......................... 13
Ground Test ......................................................... 14
Compressor Burnout............................................ 14
Fan Motor............................................................. 14
Leak Testing......................................................... 14
Brazing................................................................. 15
Restriction Testing................................................ 15
Evacuation ........................................................... 15
Charging .............................................................. 16
Using Line Piercing Valves ................................... 17
Open Lines........................................................... 17
Disassembly Procedures............................................ 18
Air Filter Removal................................................. 18
Front Frame ......................................................... 19
Outer Case Removal............................................ 19
Rotary ControlAssembly Removal....................... 20
Fan MotorAssembly and Diassembly .................. 21
Condenser Removal ............................................ 21
Compressor Overload Protector Removal............ 22
Compressor Removal .......................................... 22
Evaporator (Indoor Coil) Removal ........................ 23
AppendixA
Owner’s Manual....................................................A-1
Table of Contents

5 16022379 Rev. 0 ©2003 Maytag Appliances Company
Product Identification
EveryAmana®RoomAir Conditioner has an
identification plate showing the model number, P
(manufacturing part) number, serial number of unit.
Identification plate is located on side of unit. Use plate to
positively identify specific model of unit being serviced.
Design Information
Many design features are incorporated into allAmana®
model RoomAir Conditioners. Basic concepts of balance
in refrigeration and air handling components are used in
all models.
The outer case of unit, regardless of style, is designed to
help circulate air across evaporator, condenser,
compressor and fan motor. It must be in place to ensure
maximum efficiency of unit, to prevent overheating of
components, and to maintain system balance and
capacity.
Structural components of room air conditioners are
heavy, zinc-coated steel that is further treated with zinc
phosphate. Exterior parts are hot-dipped galvanized steel
that is chemically pretreated, then primed with electro-
coated primer, and finished with a baked-on polyester top
coat.
Modular design allows easier and faster disassembly
and assembly.
Acoustical and thermal insulation, used on partition panel
and in side air discharge plenum, reduce noise and
increase efficiency.
Large evaporator and condenser coils are designed to
provide maximum heat transfer. Coils are manufactured
from rifled copper tubing and embossed aluminum fins to
achieve maximum heat transfer. Thermal mastic is
placed on refrigeration tubes to dampen and isolate
system vibrations.
Fan motors are sealed to prevent moisture and dirt
contamination of motor windings. Motor bearings are
permanently lubricated. Large blower wheels and
condenser fans reduce noise levels.
Condenser fans contain a slinger ring for condensate
removal. The slinger ring picks-up condensate and
sprays it against the condenser, increasing condenser
evaporative cooling. In extreme humidity conditions,
excess condensate drains from base pan.
The following diagram explains how to interpretAmana
Room Air model numbers. Model numbers contain
information about cooling capacity, configuration, chassis
type, power requirements and series index for unit.
Brand
Product Type
1 2 3 4 5 6 7 8 9
Configuration
Cooling Capacity
Chassis Type
Voltage
Control Type
Series Index
9 Series Index
8 Control Type
R=Rotary Knob
T= Electronic Control
7 Chassis Type
F= Fixed
S= Slide Out
6 Voltage
1= 115 Volt
2= 230 Volt
4-5 BTU Cooling Capacity
05= 5,000 BTU
08= 8,000 BTU
10= 10,000 BTU
12= 12,000 BTU
20= 20,000 BTU
3 Configuration
C= Cooling

!WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
6 16022379 Rev. 0 ©2003 Maytag Appliances Company
Tools and Equipment
Accurate diagnosis and repair of malfunctioning air
conditioners requires proper tools and equipment. In
addition to standard hand tools (screw drivers, pliers,
sockets, etc.), the following equipment is required:
•Multimeter (combination voltmeter, ammeter, and
ohmmeter) for reading current loads during start-up
and normal operation, verifying voltage levels, and
testing various components for continuity.
•Accurate leak detector, to check for refrigerant leaks.
•Vacuum pump capable of removing all non-
condensables in sealed system.
•Charging manifold and related equipment to determine
and replenish exact refrigerant charges.
•Recovery cylinder and related equipment to recover
and store refrigerant charge in sealed system.
Additional tools and equipment may be required.
Troubleshooting Information
Troubleshooting Table
Troubleshooting table on the following pages contains
symptoms that may be seen in a malfunctioning air
conditioner. Each group of symptoms is accompanied by
one or more possible causes. Each possible cause is
accompanied by a remedy, or a test to determine if
suspect component(s) are working properly.
CAUTION
!
Units covered in this manual are polarized. Reversing polarity of a unit or any of its components will cause
damage. To avoid reversing polarity, any wires disconnected or removed during service must be reconnected to
the same location. To ensure wires are reconnected to the proper location, tag or otherwise mark the wires
before disconnecting or removing.

!WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
©2003 Maytag Appliances Company 16022379 Rev. 0 7
Troubleshooting Information
Symptom Possible Causes CorrectiveAction
Fan motor will not operate. No power supplied to unit. Check fuse box/circuit
breaker for blown fuse or
tripped breaker. Replace/reset.
Check power cord for opens.
Replace cord if faulty.
Wire(s) disconnected or loose. Ensure all connections are
tight and secure.
Fan motor capacitor faulty. Check capacitor for open/
short. Replace if faulty.
NOTE: Discharge capacitor
before testing.
Fan motor faulty. Check fan motor windings for
shorts/opens. Replace if
faulty.
Fan blade will not rotate. Fan hitting shroud or blower wheel hitting scroll. Check fan blade/blower wheel
for proper alignment on motor
shaft. Reposition if necessary.
Check fan motor for proper
position, ensure mounting
nuts/bracket tight and secure.
Fan motor operates intermittently. Wire(s) disconnected or loose. Ensure all connections are
tight and secure.
Cycling on motor protector. Replace motor.

!WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
8 16022379 Rev. 0 ©2003 Maytag Appliances Company
Troubleshooting Information
Symptom Possible Causes CorrectiveAction
Fan motor noisy. Outside coil fan blade or inside Check fan blade/blower wheel
coil blower wheel loose or improperly aligned. for proper position. Reposition
if necessary.
Ensure hardware attaching
fan blade/blower wheel to
motor shaft is tight. Tighten if
loose, replace if stripped.
Worn fan motor bearings. Replace motor.
Fan motor mounting hardware/bracket Check mounting bolts/bracket
loose . for tightness. Tighten if
necessary.
Compressor does not run,
fan motor operates normally. Wire(s) disconnected or loose. Ensure all connections are
tight and secure. Correct as
required.
Compressor capacitor faulty. Check capacitor for short.
Replace if faulty.
NOTE: Discharge capacitor
before testing.
Compressor faulty. Check compressor motor
windings for open / shorts.
Replace compressor if
faulty.

!WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
©2003 Maytag Appliances Company 16022379 Rev. 0 9
Troubleshooting Information
Symptom Possible Causes CorrectiveAction
Compressor does not run, Overload protector open. Check protector for continuity.
fan motor operates normally. If open, replace.
Rotarycontrol faulty. Ensure all control connections
are tight and secure. Check
control for proper operation
and installation. Replace if
faulty.
Compressor cycles on and off. Wire(s) disconnected or loose. Ensure all connections are
tight and secure.
Supply voltage out of specification. Check input voltage for proper
levels. Take appropriate
action if voltage levels out of
specification.
Overload protector open. Check protector for continuity.
If open, replace.
Fan motor faulty. Check fan motor for proper
operation. Replace if faulty.
Restricted air flow. Inspect air filter, indoor/
outdoor coil for dirt. Clean as
required. Check fins on coils
for damage. Straighten fins if
bent, attempt other repairs as
necessary. Replace coil if
repairs cannot be made.
Compressor capacitor faulty. Check capacitor for
short. Replace if faulty.
NOTE: Discharge capacitor
before testing.
Sealed refrigerant system fault. Test sealed system for proper
charge, leaks, and restrictions.

!WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
10 16022379 Rev. 0 ©2003 Maytag Appliances Company
Troubleshooting Information
Symptom Possible Causes CorrectiveAction
Insufficientcooling. Low refrigerant charge. Test sealed system for proper
charge. Ensure system is free
of leaks.
Restricted air flow. Inspect air filter, indoor/
outdoor coil for dirt. Clean as
required. Check fins on coils
for damage. Straighten fins if
bent, attempt other repairs as
necessary. Replace coil if
repairs cannot be made.
Unit undersized for area/room. Reduce area being cooled or
replace unit with larger
capacity model.
Excessive noise. Outside coil fan blade or inside coil Check fan blade/blower wheel
blower wheel loose or improperly aligned. for proper position. Reposition
blade or bower wheel.
Ensure hardware attaching fan
blade/blower wheel to motor
shaft is tight.
Compressor mounting hardware loose or Check mounting bolts for
grommets worn. tightness. Tighten if
necessary. Don’t overtighten.
Inspect grommets for wear.
Free parts, loose screws causing or allowing Inspect unit for parts that may
excessive vibration. have worked free, loose/
missing screws, other
problems that
may cause excessive
vibration.
Worn fan motor bearings. Replace motor