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ServiceInternational Compact Room AirConditioners

Service manual forAmanaÒ

RS5100002Revision 0July 1997

Base manual coversgeneral information on

Room Air Conditioners.Refer to individual

technical sheets forinformation on specific

models

Raytheon Appliances

This manual to be used by qualified appliancetechnicians only. Amana does not assume anyresponsibility for property damage or personalinjury for improper service procedures done byan unqualified person.

RS5100002 Rev. 0 2

Performance TestsPerformance Tests ............................................... 28Cooling Performance Test .................................... 28Cooling Wattage Consumption Test ..................... 30Performance Test Diagnosis Guide ...................... 30

Disassembly ProceduresHorizontal Insert (Front Grille) and

Air Filter Removal .......................................... 31Front Frame Removal .......................................... 32Outer case Removal ............................................ 32Fan Control Removal ........................................... 33Temperature Control Removal ............................. 33Vent Control Assembly Removal .......................... 34Capacitor Removal ............................................... 34Blower Wheel Removal ........................................ 35Condenser Fan and Fan Motor Removal ............. 36Condenser Removal ............................................ 37Compressor Removal .......................................... 38Evaporator (Indoor Coil) Removal ........................ 39Electric Heater Assembly Removal ...................... 40Compressor Overload Protector Removal ............ 40

Important InformationImportant Notices for Consumers and Servicers .. 3Recognize Safety Symbols, Words, and Labels ... 3

Important Safety InformationGeneral Information ............................................. 4Related Publications ............................................ 4General Precautions and Warnings ..................... 4

Product IdentificationDesign Information ............................................... 5

Installation InstructionsInstalling Room Air Conditioners .......................... 6Electrical Requirements ....................................... 6Earthing Instructions ............................................ 6Electrical Connection ........................................... 6Preparing for Installation ...................................... 7Tools Required ..................................................... 7General Through-Wall Installation for Slide Out

Chassis Model ............................................... 7Brick Veneer or Frame Wall Construction ............ 8Masonry Construction .......................................... 8Installation in Walls Exceeding 27 cm .................. 9

Operating InstructionsAir Conditioner Controls ....................................... 10Initial Start Up....................................................... 11

Care and MaintenanceHorizontal Insert ................................................... 12Air Filter ................................................................ 12Fan Motor ............................................................. 12Annual Inspection ................................................. 12Oceanside or Corrosive Environments ................. 12

Troubleshooting InformationTools and Equipment ............................................ 13Troubleshooting Table .......................................... 13Low Voltage ......................................................... 20High Voltage ......................................................... 20Electronic Control ................................................. 20Testing Capacitors ............................................... 20Checking Overload Protectors ............................. 21Checking Compressor Windings .......................... 21Operational Test (short term testing only) ............. 22Checking Electric Heater Assembly

(on models so equipped) ............................... 22Compressor Burnout ............................................ 23Fan Motor ............................................................. 23Dehydrating Sealed Refrigeration System ............ 23Leak Testing ......................................................... 24Brazing ................................................................. 24Restriction Testing ................................................ 25Evacuation ........................................................... 26Charging .............................................................. 27Refrigerant Precautions ....................................... 27Using Line Piercing Valves ................................... 27Open Lines ........................................................... 27

Table of Contents

3 RS5100002 Rev. 0

Important InformationPride 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 techni-cian who is familiar with the safety procedures required in the repair and who is equipped with the proper tools,parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THEAPPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS .

Important Notices for Consumers and Servicers

! WARNINGTo avoid risk of serious injury or death, repairs should not be attempted by unauthorized personal,dangerous conditions (such as exposure to electrical shock) may result.

CAUTION!Amana will not be responsible for any injury or property damage from improper service procedures. Ifperforming service on your own product, you assume all responsibility for any personal injury or propertydamage which may result

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased thisproduct. For further assistance please contact:

Consumer Affairs DepartmentAmana AppliancesAmana, Iowa, USA 52204

If outside the United States contact:

Amana AppliancesATTN: International DivisionAmana, Iowa, USA 52204Telephone: (319) 622-5511Facsimile: (319) 622-2180TELEX: 4330076 AMANACABLE: "AMANA", AMANA, IOWA, USA

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.

RS5100002 Rev. 0 4

Important Safety Information

WARNING!The standard accepted color coding for earthingwires is green or green with a yellow stripe . Theseearthing wires are NOT to be used as currentcarrying conductors. Electrical components such asthe compressor and fan motor are earthed throughan individual wire attached to the electricalcomponent and to another part of the air conditioner.Earthing wires should not be removed fromindividual components while servicing, unless thecomponent is to be removed and replaced. It isextremely important to replace all removed earthingwires before completing service.

WARNING!To avoid death or illness from excessive heat, do notuse this room air conditioner as an unattendedcooling or life support device for persons or animalsunable to react to its failure. Failure of a room airconditioner may result in extreme heat in the area itis intended to cool. Extreme heat can cause heatrelated illness or death to persons or animals.

WARNING!To avoid personal injury or death, make sure youread and understand the descriptions and meaningof various safety symbols, words and labels used inthis manual, before attempting any proceduresdescribed in the manual. Failure to understand andcomply with safety information may result in severepersonal injury or death.

General InformationThis Service Manual describes the operation,disassembly, troubleshooting, and repair of AmanaRoom Air Conditioners. It is intended for use byauthorized servicers who troubleshoot and repair theseunits.

NOTE: It is assumed that users of this manual arefamiliar with the use of tools and equipment usedto troubleshoot and repair electrical, mechanical,and refrigeration systems; and understand theterminology used to describe and discuss them.

Related PublicationsThis is a base service manual, covering a range ofsimilar models. It is intended to be used in conjunctionwith the Parts Manual and Technical Sheet coveringspecific model being serviced.

General Precautions and Warnings

WARNING!To avoid risk of electrical shock, personal injury, ordeath, disconnect electrical power to unit beforeattempting to service the unit.

WARNING!Electrical Earthing Notice: Devices covered in thismanual are equipped with an earthing plug forprotection against possible shock hazards. If a non-earthing wall receptacle is encountered, contact aqualified electrician and have the receptaclereplaced with a properly earthed wall receptacle thatcomplies with all applicable building codes.

DO NOT, under any circumstances, alter theearthing plug. Air conditioner must be earthed at alltimes. Do not remove warning tag from power cord.

5 RS5100002 Rev. 0

Every Amana Room Air Conditioner has an identificationplate showing the model number, P (manufacturing part)number, serial number, etc. of unit. Identification plate islocated on front of unit, behind air filter, in lower leftcorner. Use plate to positively identify specific model ofunit being serviced.

The following diagram explains how to read Room AirConditioner model numbers. Model numbers containinformation about cooling capacity, chassis type, powerrequirements, feature set, and design series for unit.

10 C 5 E Z

BTUH (Thousands)

ELECTRIC HEATCASE STYLE:SLIDE OUT (C)

WRAP AROUND (P)

DESIGN LEVEL

INTERNATIONAL (50 Hz)

Design InformationMany design features are incorporated into all AmanaRoom Air Conditioners. Basic concepts of balance inrefrigeration and air handling components are used in allmodels.

The outer case of unit, regardless of style, is designed tohelp circulate air across evaporator, condenser,compressor and fan motor. It must be in place to ensuremaximum efficiency of unit, to prevent overheating ofcomponents, and to maintain the balance and capacity ofthe system.

Structural components of room air conditioners areheavy, zinc-coated steel that is further treated with zincphosphate, and electro-coated. Exterior surfaces aregiven an additional coat of baked-on polyester.

Acoustical and thermal insulation are used on thepartition panel and in the air discharge plenum to reducenoise and increase efficiency.

Large evaporator and condenser coils are designed toprovide maximum heat transfer. Coils are manufacturedfrom rifled copper tubing and rippled edge aluminum finsto achieve maximum heat transfer. Vibration loops inrefrigeration tubes dampen and isolate system vibrations.

Product Identification

Fan motors are sealed to prevent moisture and dirtcontamination of motor windings. Motor bearings arepermanently lubricated. Large blower wheels andcondenser fans reduce noise levels.

Condenser fans contain an integral slinger ring forcondensate removal. The slinger ring picks-upcondensate and sprays it against the condenser,increasing condenser evaporative cooling. Alternatively(in areas of excessive humidity), condensate can drainfrom the base pan by puncturing or removing a grommetin the base pan.

CAUTION!To prevent condenser damage, use care whenpuncturing or removing base pan grommet. Avoidusing tools long enough to reach the condenser.

NOTE: Drain grommet should only be punctured orremoved in areas of high humidity, whenexcessive condensate accumulates in the basepan. Condensate removal through the slingerring increases the cooling capacity of the airconditioner.

RS5100002 Rev. 0 6

Installation Instructions

Installing Room Air ConditionersProper installation of a room air conditioner helps ensuretrouble free operation of the unit. Improper installation ofthis device can result in problems ranging from noisyoperation to property or equipment damage.

The following paragraphs describe how to properly installan Amana Room Air Conditioner. Before attempting toinstall the unit:

• Carefully read all instructions pertaining to installation.Make sure each step or procedure is understood andany special considerations are taken into account.

• Assemble all tools and hardware needed to completeinstallation. Some items may need to be purchasedlocally. Make sure required tools and hardware are onhand before starting.

• After deciding where to install unit, closely look thelocation over, both inside and outside. Note anypotential obstacles or problems that might beencountered. Choose a more suitable location ifnecessary.

Electrical Requirements

WARNING!To avoid risk of electrical shock, personal injury, ordeath:

• Electrical earthing is required on this device.

• DO NOT earth to gas line.

• If cold water pipe is interrupted by plastic,nonmetallic gaskets, or other insulating (nonconducting) materials, DO NOT use it for earth.

• Check with a qualified electrician if you are not surethis appliance is properly earthed.

• DO NOT modify plug on power supply. If plug doesnot fit electrical outlet, have a proper outlet installedby a qualified electrician.

• DO NOT have a fuse in the neutral or earth circuit.A fuse in the neutral or earth circuit could result inan electrical shock.

• DO NOT use an extension cord with this appliance.

Observe all local codes and ordinances.

Earthing Instructions

WARNING!To avoid risk of electrical shock or property damagedue to overheating, do not under any circumstancesalter earthing plug. Do not bend or trim powerprongs on plug to make them fit a receptacle forwhich they are not intended.

For your personal safety, air conditioner must be earthed.This air conditioner includes a power supply cord with anearthing plug. To minimize possible electrical shockhazard, the power cord must only be plugged into amatching earthing wall receptacle that complies with allapplicable codes and ordinances. If a matching earthing-type wall receptacle is not available, it is the responsibilityof the consumer to have a properly earthed wallreceptacle installed by a qualified electrician.

If codes permit, and a separate earthing wire is used,have a qualified electrician determine if earthing path isadequate and uninterrupted by plastic, nonmetallicgaskets, or other insulating (non conductive) materials.

Do not use an extension cord. If power cord suppliedwith air conditioner is too short, have a qualifiedelectrician install an appropriate receptacle closer to unit.

Receptacle WiringReceptacle wiring should be 14 gauge, minimum. Usecopper wire only. It is the responsibility of the consumerto provide proper and adequate receptacle wiring,installed by a qualified electrician.

Electrical ConnectionElectrical earth is required on this appliance.

Electrical RequirementsA separate circuit, serving only this appliance, MUST beprovided. Devices covered in this manual require a 50 Hzsupply. Refer to unit name plate or Technical Sheet forexact voltage requirements.

7 RS5100002 Rev. 0

General Through-Wall Installation for SlideOut Chassis ModelAmana Room Air Conditioners with slide out chassistype cases are designed to be installed through a wall orin a window. The following instructions describe generalprocedures for wall installations. Specific instructions forinstalling individual models are packed with the unit. Usespecific instructions to install unit.

Typical Cabinet DimensionsNOTE: Window installations require a Window Mounting

Kit. See an Authorized Amana Dealer for propermounting kit.

Typical Cabinet Dimensions


Preparing for Installation

CAUTION!To avoid risk of personal injury or product damage:

• Have someone help install the unit. The airconditioner weighs between 40 and 48 kg(depending upon model). When lifting the unit up orsetting the unit down, use proper lifting techniquesto prevent injury or strain.

• Inspect location where unit is to be installed. Besure it will support the weight of the unit over anextended period of time.

• This appliance must be installed according to allapplicable codes and ordinances.

• Handle air conditioner with care. Wear protectivegloves whenever lifting or carrying the unit. AVOIDthe sharp metal fins on front and rear coils.

• Make sure air conditioner does not fall duringinstallation.

• Do not use condensate water for drinking orcooking. It is not sanitary.

Tools RequiredThe following tools are required for installation:

• Flat head screwdriver

• Phillips head screwdriver

• Carpenter’s level

• Tape measure

• Electric or hand drill

• Circular saw with wood, masonry, and/or concreteblades.

• 9/64 inch drill bit

69.8 cm 62.2+ cm

40.3 cm

27 cm

RS5100002 Rev. 0 8

General InstructionsA finished opening in wall is required. Dimensions ofopening are 62 cm wide X 42 cm high. The lower rightinside corner of opening must be within 1.5 meters of anappropriate electrical outlet.

When installed, back of case should be 1 cm lower thanfront of case for proper condensate drainage. Insideedge of case must extend 1.3 cm beyond inside wall toproperly seat air conditioner front cover. After installation,caulk completely around outside of unit to ensure it isproperly sealed. Depending on wall construction andopening location, a lintel (not included) may be required.

NOTE: To avoid sealing air conditioner in case, do notcaulk exposed air conditioner base pan onbottom of cased. Use foam seal strips or similarmaterial to fill any gaps between base pan andwall opening.

For appearance sake, it may be desirable to frame insideopening with decorative molding. If molding is used,mount case in opening so inside edge of case extends1.3 cm beyond molding.

When wall thickness exceeds 27 cm, provisions must bemade to allow air to enter the condenser side louvers.See paragraph Installation in Walls Exceeding27 cm .

17-1/2"

26-3/4"

Appropriate grounded power outlet must be within 5 feet of this location.

Note special requirementsfor walls thickerthan 12"

Typical Wall Opening

Brick Veneer or Frame Wall ConstructionA framed, finished opening 62 cm wide X 42 cm highhigh should be cut out or built into wall. Frame openingwith 5 cm X 10 cm lumber to permit attachment of outercase.

17-1/2"

26-3/4"

Brick Veneer Wall Installation

Masonry ConstructionA finished opening 62 cm wide X 42 cm high should becut out or built into masonry wall. Seal outer case inplace with mortar, or secure to wall with concrete nailsdriven through sides of case.

NOTE: If securing case with concrete nails, predrillholes in case before driving nails into wall.


42 cm

62 cm

42 cm

62 cm

1.5 meters

27 cm.

9 RS5100002 Rev. 0

Installation in Walls Exceeding 27 cmAll air conditioner models have side louvers on outercase. When air conditioner is installed in walls over27 cm thick, provisions must be made in the wall openingto allow unobstructed air flow to the side louvers. Thiscan be accomplished by chamfering the vertical portionsof the outside opening as shown.

Caulk allsides

Lintel andflashing(if required)

Wall studor framing

Optionalmolding (not provided)

Outercase must projecta minimum 1/2" beyond inside wallor molding to attach front frame

11-3/8"

Front of outercase toair intakelouvers

Install casewith 3/8"slope to outsidefor condensatedrainage

Walls Exceeding 27 cm (Side View)


MortarCaulk

Inside wall

Outside wall Air intake louvers

Wall stud or framing

Walls Exceeding 27 cm (Top View)

1.3 cm

27 cm

10.2 cm 10.2 cm

1.3 cm

27 cm

1 cm

RS5100002 Rev. 0 10

Operating Instructions

Air Conditioner ControlsThere are three types of air conditioner control panelsavailable: a touch control, a rotary control, and analternate rotary control.

CLOSED EXHAUST

VENT CONTROL

FAN CONTROL

OFF

LOWCOOL

MEDIUMCOOL

HIGHCOOL

TEMPERATURE CONTROL

1

8

765

4

3

2

FANONLY

ECONOMYSETTINGS

Touch Control

CLOSED EXHAUST

VENT CONTROL

FAN CONTROL

OFF

LOWCOOL

NORMALCOOL

EXTRAHIGH

TEMPERATURE CONTROL

1

8

765

4

3

2

FANONLY

ECONOMYSETTINGS

Rotary Control

CLOSED EXHAUST

VENT CONTROL

FAN CONTROL

OFF

LOWCOOL

MEDCOOL

HIGHCOOL

TEMPERATURE CONTROL

1

8

765

4

3

2

FANONLY

ECONOMYSETTINGS

Alternate Rotary ControlEach control panel (regardless of its type) has thefollowing three controls:

VENT CONTROL

FAN CONTROL

TEMPERATURE CONTROL

Vent ControlThe VENT CONTROL is used to recirculate or exhaustroom air, by controlling a damper.

When control is in CLOSED position, damper is closed.When closed, air in area being cooled is recirculatedthrough air conditioner and back into room. No air isexhausted (vented) outside.

NOTE: For maximum efficiency and cooling, VENTCONTROL should remain in closed position anytime air conditioner is cooling.

When control is in EXHAUST position, damper is open.When open, room air is exhausted (vented) outside. Useexhaust position to remove stale or smoky air from area.

NOTE: To conserve energy, TEMPERATURECONTROL should be in FAN ONLY positionwhen using exhaust feature.

11 RS5100002 Rev. 0

Operating Instructions

Fan ControlThe FAN CONTROL controls operation of indoor fan.This fan circulates air in area being cooled.

On touch control panels, select desired setting bypressing appropriate touch pad until red indicator on padappears. On rotary control panels, turn selector switchto desired setting.

The FAN CONTROL settings include:

LOW COOL—Fan operates continuously at low speedand compressor cycles on and off depending upon roomtemperature. When on, compressor cools anddehumidifies air circulating through air conditioner.Select this setting for quiet operation.

MEDIUM COOL, NORMAL COOL, or MED COOL(touch control, rotary control, or alternate rotary control,respectively)— Fan operates continuously at mediumspeed and compressor cycles on and off dependingupon room temperature. When on, compressor coolsand dehumidifies air circulating through air conditioner.

HIGH COOL or EXTRA HIGH (touch control/alternaterotary control, or rotary control)—Fan operatescontinuously at high speed and compressor cycles onand off depending upon room temperature. When on,compressor cools and dehumidifies air circulatingthrough air conditioner. Use this setting for maximum aircirculation and faster cool down during initial start up.

FAN ONLY (rotary control only)—Fan operatescontinuously at high speed and compressor remains off.Use this setting to circulate air without cooling and, withVENT CONTROL in EXHAUST position, to vent room ofstale air, odors, smoke, etc.

OFF—Turns air conditioner off.

CAUTION!To avoid tripping circuit breakers or blowing fuses,wait two minutes after turning air conditioner off,before turning unit on again.

NOTE: Unplug air conditioner if it is to be turned off foran extended period of time.

Temperature ControlThe TEMPERATURE CONTROL is used to set andadjust level of cooling. The higher control is set, thecooler room or area being cooled becomes.

NOTE TEMPERATURE CONTROL setting does notaffect how quickly a room is cooled, it onlydetermines how cool a room becomes. Settingcontrol to its maximum setting will not cool aroom faster.

Control settings of 3 and below are ECONOMYSETTINGS. Setting control in this range can result inenergy savings by reducing amount of time compressoroperates (because room or area is not being cooled asmuch as with higher settings).

Turning control fully counterclockwise to FAN ONLYposition (touch control and alternate rotary control) turnscompressor off, but keeps fan running. Use this settingto circulate air without cooling and, with VENTCONTROL in EXHAUST position, to vent room of staleair, odors, smoke, etc.

Initial Start Up

WARNING!To avoid risk of personal injury or death from fire orelectric shock, read IMPORTANT SAFETYINSTRUCTIONS before operating this device.

To start air conditioner for the first time, or after it hasbeen turned off for an extended period:

1. Ensure all doors and windows in area being cooledare tightly closed.

2. Check FAN CONTROL on air conditioner controlpanel. Control should be in the OFF position.

3. Plug power cord on air conditioner into wallreceptacle.

WARNING!To avoid risk of personal injury or death due toelectrical shock, devices covered in this manual areequipped with an earthing plug. If a non-earthingwall receptacle is encountered, contact a qualifiedelectrician and have the receptacle replaced with aproperly earthed wall receptacle that complies withall applicable building codes.

DO NOT, under any circumstances, alter theearthing plug. Air conditioner must be earthed at alltimes. Do not remove warning tag from power cord.

NOTE: Unplug air conditioner if it is to be turned off foran extended period of time.

4. Turn FAN CONTROL to highest cooling position andTEMPERATURE CONTROL to coldest position (fullyclockwise).

5. Make sure VENT CONTROL is closed. For maximumefficiency and cooling, vent control should be closedwhenever air conditioner is cooling.

6. When area being cooled reaches desired tempera-ture, slowly turn TEMPERATURE CONTROL coun-terclockwise until compressor turns off.

Temperature control will continue to cycle compressor onand off, maintaining room at desired temperature.

RS5100002 Rev. 0 12

Care and Maintenance

Fan MotorThe fan motor is permanently lubricated. Additionallubrication should never be applied. Contact anauthorized Amana Service Center if fan malfunctions inany manner.

Annual InspectionHave air conditioner inspected by an authorized Amanadealer or service representative once a year. If operatingunit in a dusty climate or environment, remove chassisfrom outer case and thoroughly clean unit morefrequently.

Oceanside or Corrosive EnvironmentsSalt air and other corrosive environments may accelerateaging of air conditioner. When operated in theseenvironments unit should be removed from outer caseand completely cleaned at least once a year. Anyscratches or blisters on painted surfaces should besanded and repainted.

Use of an algicide tablet (placed in the base pan) issuggested in areas where algae formation is common.

WARNING!To avoid risk of electrical shock, personal injury, ordeath, disconnect electrical power to unit beforeattempting to service the unit.

Horizontal InsertThe horizontal insert (front grille) is removable, to accessair filter. Horizontal insert is removed by grasping bottomcenter of insert, then lifting and pulling out. Clean insertand cabinet with a mild soap or detergent. Do not usecleaners with abrasives or polishing compounds, theymay damage plastic surfaces.

CAUTION!To avoid damage to polycarbon components (likethe horizontal insert), do not use hydrocarbon basedcleaners. Hydrocarbon will cause polycarbon towarp, turn brittle, splinter or crack.

Air FilterEach unit has a permanent, removable air filter. Air filtershould be inspected regularly, and cleaned if necessary.It can be cleaned with a vacuum cleaner or washed in amild detergent. Filter should be thoroughly dried before itis replaced.

NOTE: Do not operate air conditioner without a filter.

13 RS5100002 Rev. 0

Troubleshooting TableTroubleshooting table on following pages containssymptoms that may be seen in a malfunctioning airconditioner. Each group of symptoms is accompanied byone or more possible malfunctions. Each malfunction isaccompanied by a remedy, or a test to determine ifsuspect component(s) are working properly.

Tools and EquipmentAccurate diagnosis and repair of malfunctioning airconditioners requires proper tools and equipment. Inaddition to standard hand tools (screw drivers, pliers,sockets, etc.), the following equipment is required:

• Thermocouple type temperature tester, with sufficientrange to meet all testing and measuring requirements.

• Multimeter (combination voltmeter, ammeter, andohmmeter) for reading current loads during start upand normal operation, verifying voltage levels, andtesting various components for continuity.

• Standard refrigeration-type test cord for "live" testing ofvarious electrical circuits and components, and directwiring of compressor.

• 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 determineand replenish exact refrigerant charges.

• Recovery cylinder and related equipment to recoverand store refrigerant charge in seal system.

Additional tools and equipment may be required.

Troubleshooting Information

! WARNINGTo avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit anddischarge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures requirepower to be connected. Ensure all earth wires are connected before certifying unit as repaired and/oroperational.

CAUTION!Units covered in this manual are polarized. Reversing polarity of a unit or any of its components will causedamage. To avoid reversing polarity, any wires disconnected or removed during service must be reconnected tothe same location. To ensure wires are reconnected to the proper location, tag or otherwise mark the wiresbefore disconnecting or removing.

RS5100002 Rev. 0 14

Symptom Possible Causes Corrective Action

Fan motor will not operate. No power supplied to unit. Check fuse box/circuit breakerfor blown fuse or trippedbreaker. Replace/reset.

Power supply cord faulty. Check power cord for opens.Replace cord if faulty.

Fan control faulty. Ensure all control connectionsare tight and secure.Check control for properoperation. Replace if faulty.

Temperature control faulty. Ensure all control connectionsare tight and secure.Check control for properoperation. Replace if faulty.

Wire(s) disconnected or loose. Ensure all connections aretight and secure.

Fan motor capacitor faulty. Check capacitor for open/short. Replace if faulty.NOTE: Discharge capacitorbefore testing.

Faulty fan motor faulty. Check fan motor windings forshorts/opens. Replace iffaulty.

Fan blade will not rotate. Fan hitting shroud or blower wheel hitting scroll. Check fan blade/blower wheelfor proper alignment on motorshaft. Reposition if necessary.Check fan motor for properposition, ensure mountingnuts/bracket tight and secure.

Fan motor operates intermittently. Cycles on motor protector. Replace motor.

Fan control faulty. Ensure all control connectionsare tight and secure.Check control for properoperation. Replace if faulty.

Wire(s) disconnected or loose. Ensure all connections aretight and secure. Correct asrequired.



15 RS5100002 Rev. 0


Fan motor noisy. Outside coil fan blade or inside Check fan blade/blower wheelcoil blower wheel loose or improperly aligned. for proper position. Reposition

if necessary.Ensure hardware attaching fanblade/blower wheel to motorshaft is tight. Tighten if loose,replace if stripped.

Worn fan motor bearings. Check bearings for wear/lowlubricant. Replace motor ifeither condition found.

Fan motor mounting hardware/bracket Check mounting bolts/bracketloose or grommets worn (if applicable). for tightness. Tighten if

necessary.Inspect grommets for wear.Replace if necessary.

Compressor does not run, Supply voltage out of specification. Check input voltage for properfan motor operates normally. levels. Take appropriate

action if voltage levels out ofspecification.



Compressor motor capacitor faulty. Check capacitor for open/short. Replace if faulty.NOTE: Discharge capacitorbefore testing.

Compressor faulty. Check compressor motorwindings for open shorts.Perform compressor directwiring test. NOTE: Dischargecapacitor before testing.Replace compressor iffaulty.

Overload protector open. Check protector for continuity.If open, replace.NOTE: Ensure compressor/overload are below triptemperature before testing.



RS5100002 Rev. 0 16


Compressor cycles on and off. Supply voltage out of specification. Check input voltage for properlevels. Take appropriateaction if voltage levels out ofspecification.

Overload protector open . Check protector for continuity.If open, replace.NOTE: Ensure compressor/overload are below triptemperature before testing.

Fan motor faulty. Check fan motor for properoperation. Replace if faulty.

Restricted air flow. Inspect air filter, indoor coil fordirt. Clean as required.Check condenser fins fordamage. Straighten fins ifbent, attempt other repairs asnecessary. Replacecondenser if repairs cannot bemade.

Compressor motor capacitor faulty. Check capacitor for open/short. Replace if faulty.NOTE: Discharge capacitorbefore testing.


Sealed refrigerant system fault. Test sealed system for propercharge, leaks, and restrictions.Repair as required.

Insufficient cooling. Low refrigerant charge. Test sealed system for propercharge. Ensure system is freeof leaks. Repair as required.

Restricted air flow. Inspect air filter, indoor coil fordirt. Clean as required.Check condenser fins fordamage. Straighten fins ifbent, attempt other repairs asnecessary. Replacecondenser if repairs cannot bemade.



17 RS5100002 Rev. 0


Insufficient cooling. Vent control in exhaust position/ Ensure vent control in closedvent door stuck open. position when unit is cooling

(consumer education).Check vent door for properoperation. Replace/repair asrequired.

Unit undersized for area/room. Reduce area being cooled.

Excessive noise. Outside coil fan blade or inside coil Check fan blade/blower wheel blower wheel loose or improperly aligned. for proper position. Reposition

if necessary.Ensure hardware attaching fanblade/blower wheel to motorshaft is tight. Tighten if loose,replace if stripped.

Worn fan motor bearings. Check bearings for wear/lowlubricant. Replace motor ifeither condition is found.

Fan motor mounting hardware/ Check mounting bolts/bracketbracket loose or grommets worn (if applicable). for tightness. Tighten if


Copper tubing loose. Inspect copper tubing forlooseness. Secure tubing asrequired.

Compressor internal noise. Inspect compressor for properoperation. Replace asrequired.

Compressor mounting hardware loose or Check mounting bolts forgrommets worn. tightness. Tighten if


Free parts, loose screws causing or allowing Inspect unit for parts that mayexcessive vibration. have worked free, loose/

missing screws, otherproblems thatmay cause excessivevibration.Repair as required.



RS5100002 Rev. 0 18


Excessive condensate in base. Unit operating under excessive humidity Remove condensate drainconditions. plug in base.

NOTE: Removal of plug mayresult in slight decrease incooling efficiency. Removalnot recommended ifexcessive humidity istemporary and infrequentcondition for area.

No cooling. Low refrigerant charge or leak in sealed system. Test sealed system for propercharge. Ensure system is freeof leaks. Repair as required.

Blockage in seal system. Evacuate/recharge sealedsystem.

Compressor faulty. Check compressor motorwindings for open shorts.Check compressor seals.Perform compressor directwiring test.Replace compressor iffaulty.


Wattage slowly decreases below Undercharged, restricted strainer or plugged Test sealed system for properminimum specification. capillary tube. charge. Check system for

leaks/restrictions. Repair asrequired. Evacuate/recharge sealed system.

Wattage decreases immediately. No Refrigerant. Test sealed system for propercharge. Ensure system is freeof leaks. Repair as required.

Compressor faulty. Check compressor motorwindings for open shorts.Check compressor seals.Perform compressor directwiring test.Replace compressor iffaulty.



19 RS5100002 Rev. 0


Wattage continuously high. Refrigerant overcharge. Test sealed system for propercharge. Repair as required.

Evaporator coil partially frosted. System low on refrigerant. Test sealed system for propercharge. Ensure system is freeof leaks. Repair as required.

Restricted capillary tube. Replace capillary tube.

Insufficient air flow. Inspect air filter, indoor/outdoorcoil for dirt. Clean as required.Check condenser fins fordamage. Straighten fins ifbent, attempt other repairs asnecessary. Replacecondenser if repairs cannot bemade.

Evaporator completely iced. Low outside temperature. Turn unit off.(Consumer education)

Restricted capillary tube. Replace capillary tube.

Insufficient air flow. Inspect air filter, indoor/outdoorcoil for dirt. Clean as required.Check condenser fins fordamage. Straighten fins ifbent, attempt other repairs asnecessary. Replacecondenser if repairs cannot bemade.



RS5100002 Rev. 0 20

Low VoltageLow voltage can result in one or more of the followingproblems:

• Unit will not operate.

• Compressor motor cycling.

• Premature failure of overload protector.

• Frequent blown fuses or tripped circuit breakers.

• Premature failure of compressor or fan motor.

• Noticeable dimming of lights when unit is operating.

• Evaporator icing, caused by reduced fan speed.

Common causes for low voltage include inadequatesupply circuit wiring, use of extension cords, and loosefuses or connections in fuse box, circuit breaker, ordistribution panel.

NOTE: A good indication of voltage problems caused byinadequate or faulty wiring is voltage levels thatdo not remain constant under load (supplyvoltage fluctuates).

A less common cause for low voltage is voltage fromlocal electric utility is low (sometimes called "brownouts"). If this is the case, have consumer contact electricutility for assistance.

All units should operate normally if power stays withinspecifications (refer to Technical Sheet for unit undertest).

Test for low voltage using voltmeter. Verify voltage levelat circuit breaker/distribution panel for unit under test,and at electrical outlet serving unit. Take initial voltagereadings with air conditioner turned off. Take additionalreadings during start-up of unit, and again while unit isoperating. All readings should be within specificationsand remain constant.

NOTE: Supply voltage may drop momentarily duringinitial start-up and when compressor first starts,but should always remain within specifications.

High VoltageHigh voltage causes motors to overheat, cycle on theirprotectors, or break down electrically. This problem canonly be solved by local electric utility.

Electronic ControlElectronic control (on units so equipped) is notrepairable. If any component in the control is faulty, entirecontrol must be replaced.

NOTE: Repair or replace all malfunctioning line voltagecomponents before testing or replacingelectronic control. Do not assume problems arecaused by electronic control system. Opened,shorted, earthed or otherwise malfunctioning linevoltage components (including power cord andwiring) can create problems that appear to becaused by electronic control.

Testing CapacitorsAll compressors use permanent split capacitor typemotors, eliminating need for start capacitors and relays.A low capacitance "compressor run capacitor" assistsduring start, and remains in system during operation.Line side of run capacitor is marked with a dot and mustbe installed on line side of supply circuit. See directionson capacitor, and wiring diagram (on Technical Sheet) forunit under test.

Capacitors are also used on permanent split capacitor(PSC) fan motors.

To test capacitors:

1. Disconnect power to unit.

2. Discharge capacitor by shorting capacitor terminalsthrough a 10,000 ohm resistor. Disconnect leadsattached to capacitor terminals.

3. Set ohmmeter on highest scale. Attach ohmmeterleads to capacitor and observe ohmmeter display:

• Good condition—indicator swings to zero andslowly returns toward infinity.

• Shorted—indicator swings to zero and remains.Replace capacitor.

• Open—indicator does not move. Replace capacitor.

4. Reverse ohmmeter leads on capacitor and repeatStep 3.



21 RS5100002 Rev. 0

Checking Overload ProtectorsOverload protectors protect compressor from currentand temperature overloads by removing power fromcompressor before it is damaged.

To check overload protector:


2. Discharge capacitor by shorting capacitor terminalsthrough a 10,000 ohm resistor.

3. Remove overload lead from compressor terminal.

4. Use ohmmeter to test continuity between overloadterminals. If open, replace overload.

Checking Compressor WindingsResistance Test1. Disconnect power to unit.


3. Remove leads from compressor terminals.

4. Set ohmmeter to lowest scale.

5. Attach ohmmeter to compressor terminals C and S.Note reading.

6. Attach ohmmeter to compressor terminals C and M.Note reading.

If either compressor winding reads open (infinite or veryhigh resistance) or dead short (0 ohms), replacecompressor.

NOTE: Motor windings typically have very littleresistance. When checking windings for shorts,ensure ohmmeter is set on lowest scale. Goodwindings may indicate as little as 2 ohms ofresistance.

Ground Test1. Disconnect power to unit.



4. Set ohmmeter to highest scale.

5. Attach one lead of ohmmeter to body of compressor.Ensure connection point is clean, and makes goodcontact with compressor.

6. Attach remaining lead on ohmmeter to C, then S, thenM terminals on compressor.

If ohmmeter indicates continuity between compressorcase and any terminal, replace compressor.



RS5100002 Rev. 0 22

Operational Test (short term testing only)If compressor voltage, capacitor, overload, and motorwinding tests are successful (do not indicate a fault),perform the following test:




4. Attach test cord to compressor windings.

• Common lead on test cord attaches to C terminalon compressor.

• Start lead on test cord attaches to S terminal oncompressor.

• Run lead on test cord attaches to M terminal oncompressor.

NOTE: Ensure test cord cables and fuses meetspecifications for unit under test (see TechnicalSheet for unit under test).

Attaching Capacitor for Compressor Test

5. Connect a known good capacitor into circuit as shownabove. For proper capacitor size and rating, seeTechnical Sheet for unit under test.

6. Replace compressor protector cover securely.

7. Plug test cord into outlet, then press and release startcord switch.

CAUTION!To avoid damage to compressor windings,immediately disconnect (unplug) test cord frompower source if compressor does not start. Damageto compressor windings occurs if windings remainenergized when compressor is not running.

If compressor runs when direct wired, it is workingproperly. Malfunction is elsewhere in system.

If compressor does not start when direct wired, recoversystem at high side. After the system is recovered,repeat compressor direct wire test.

If compressor runs after system is recovered (but wouldnot operate when wired direct before recovery) arestriction in sealed system is indicated.

If motor does not run when wired direct after recovery,replace faulty compressor.

Checking Electric Heater Assembly (onmodels so equipped)1. Disconnect power to unit.

2. Ensure heater element is cold, then remove suspectheater and visually inspect element for obviousdamage (breaks, cracks in element, etc.).

3. Attach ohmmeter to element leads. Check forcontinuity (14.4 ohms cold).

If element reads open (infinite or very high resistance):

4. Remove fuse links and test for continuity. Top fuselink, nearest the thermostat, opens at 152°C. Bottomfuse link opens at 93°C. If either or both are open,replace.

5. Check disc type thermostat for continuity (opens at52°C ±3°C, closes at 38°C ±4°C automatic reset). Ifopen replace.



23 RS5100002 Rev. 0

Compressor Burnout

WARNING!To avoid personal injury, do not allow sludge or oilfrom compressor to contact skin. Severe burns mayresult.

NOTE: Before opening any refrigeration system, capturerefrigerant in system for safe disposal.

NOTE: Do not use captured or recycled refrigerant inAmana units. Captured or recycled refrigerantvoids any Amana and/or compressormanufacture's warranty.

When a compressor burns out, high temperature causesthe refrigerant, oil, and motor insulation to decompose,forming acids and sludge.

If a compressor is suspected of burning out:


2. Attach piercing valve to process tube of liquid linestrainer. Discharge refrigerant in system to a recoverycylinder.

3. Remove compressor and obtain an oil sample fromsuction stub on compressor.

4. Analyze oil sample using Sporlan Acid Test Kit, AK-3(or equivalent)

If oil sample is within parameters, a burnout has notoccurred or is so mild that compressor replacement isnot necessary. Reinstall compressor.

If acid level is unacceptable, replace compressor.

Fan Motor1. Disconnect power to unit.


3. Disconnect fan motor leads from selector switch andrespective capacitor.

4. Check for continuity between each motor lead withohmmeter.

5. Check for ground by attaching one lead of ohmmeterto motor frame (ground). Attach remaining ohmmeterlead to each fan motor lead, one at a time.

NOTE: Ensure contact point between ohmmeter leadand motor frame is clean.

Replace fan motor if windings test open (very high orinfinite resistance), or if any continuity is indicatedbetween motor frame and windings.

When replacing fan motor:

• Replacement fan motor must be installed with motorleads below level of motor shaft.

• Drip loop in motor leads must be below wire openingsin motor housing.

• Coat exposed areas of shaft from blower wheel or fanblade to end of shaft with Cosmoline or equivalent toprevent corrosion.

• Ensure evaporator blower wheel and/or condenser fanblade clearance tolerances are correct. Distancebetween evaporator blower wheel and orifice ring isexact and important (3.2 mm on portables, 6.4 mm onhigh efficiency and 12.7 mm on compacts).

Condenser fan blade should be centered in fan shroudring. Distance between fan blade and condenser finsshould be:

5—8,000 Btu units 6.4 cm

10—12,000 BTU units 38.2 cm

14—21,000 BTU units 25.4 cm

Dehydrating Sealed Refrigeration SystemMoisture in a room air conditioner sealed system, whenexposed to heat generated by the compressor andmotor, reacts chemically with refrigerant and oil in thesystem and forms corrosive hydrochloric and hydrofluoricacids. These acids contribute to the breakdown of motorwinding insulation and corrosion of compressor workingparts, causing compressor failure.

In addition, sludge, a residue of the chemical reaction,coats all surfaces of sealed system, and will eventuallyrestrict refrigerant flow through capillary tube.

To dehydrate seal system, evacuate system (seeparagraph Evacuation ).



RS5100002 Rev. 0 24

Leak Testing

DANGER!To prevent serious injury or death from violentexplosions, NEVER use oxygen or acetylene forpressure testing or cleanout of refrigeration systems.Free oxygen will explode on contact with oil.Acetylene will explode spontaneously when putunder pressure.

It is important to check sealed system for refrigerantleaks. Undetected leaks can lead to repeated servicecalls and eventually result in system contamination,restrictions, and premature compressor failure.

Refrigerant leaks are best detected with halide orelectronic leak detectors.

NOTE: The flame on a halide detector glows green inthe presence of CFC22 refrigerant.

Testing Systems Containing a Refrigerant Charge1. Stop the operation (turn air conditioner off).

2. Holding leak detector exploring tube as close tosystem tubing as possible, check all piping, joints,and fittings.

NOTE: Use soap suds on areas leak detector can notreach or reliably test.

Testing Systems Containing No Refrigerant Charge1. Connect cylinder of nitrogen, through gauge manifold,

to process tube of compressor and liquid line strainer.

2. Open valves on nitrogen cylinder and gage manifold.Allow pressure to build within sealed system.

3. Check for leaks using soap suds.

If a leak is detected in a joint, do not to attempt to repairby applying additional brazing material. Joint must bedisassembled, cleaned and rebrazed. Capture refrigerantcharge (if system is charged), unbraze joint, clean allparts, then rebraze.

If leak is detected in tubing, replace tubing. If leak isdetected in either coil, replace faulty coil.

Brazing

CAUTION!To reduce risk of personal injury or propertydamage, take necessary precautions against hightemperatures required for brazing.

Satisfactory results require cleanliness, experience, anduse of proper materials and equipment.

Connections to be brazed must be properly sized, free ofrough edges, and clean.

Generally accepted brazing materials are:

• Copper to copper joints : SIL-FOS (alloy of 15percent silver, 80 percent copper, and 5 percentphosphorous). Use without flux. Recommendedbrazing temperature is approximately 760°C. DO NOTUSE FOR COPPER TO STEEL CONNECTION.

• Copper to steel joints : SILVER SOLDER (alloy of 30percent silver, 38 percent copper, 32 percent zinc).Use with fluoride based flux. Recommended brazingtemperature is approximately 650°C.

• Steel to steel joints : SILVER SOLDER (see copperto steel joints).

• Brass to copper joints : SILVER SOLDER (seecopper to steel joints).

• Brass to steel joints : SILVER SOLDER (see copperto steel joints).



25 RS5100002 Rev. 0

Restriction TestingRestrictions in sealed system generally occur in capillarytube or strainer, but can exist anywhere on liquid side ofsystem. To determine if a restriction exists:

1. Attach gauge and manifold between suction anddischarge sides of sealed system.

2. Turn unit on, and allow pressure on each side tostabilize. Inspect condenser side of system. Tubingon condenser should be warm and temperatureshould be equal through out (no sudden drops at anypoint along tubing):

• If temperature of condenser tubing is consistentthrough out, go to step 3.

• If temperature of condenser tubing drops at anypoint, tubing is restricted at point of temperaturedrop (if restriction is severe, frost may form at pointof restriction and extend down in direction ofrefrigerant flow in system). Go to step 4.

3. Turn unit off and time how long it takes high and lowpressure gauges to equalize:

• If pressure equalization takes longer than 7minutes, a restriction exists in the capillary tube/strainer. Go to step 4.

• If pressure equalization takes less than 7 minutes,system is not restricted. Check for other possiblecauses of malfunction.

4. Recover refrigerant in seal system.


5. Remove power from unit.


6. Remove and replace restricted device.

7. Evacuate sealed system.

8. Charge system to specification.


NOTE: Charge system with exact amount of refrigerant.See Technical Sheet or refer to unit nameplatefor correct refrigerant charge. Inaccuratelycharged system will cause future problems.



RS5100002 Rev. 0 26

Evacuation

WARNING!To avoid risk of fire, sealed refrigeration systemmust be air free. To reduce risk of air contaminationfollow evacuation procedures exactly.


Proper evacuation of sealed refrigeration system is animportant service procedure. Usable life and operationalefficiency of air conditioner greatly depends upon howcompletely air, moisture and other non-condensables areevacuated from sealed system.

Air in sealed system causes high condensingtemperature and pressure, resulting in increased powerrequirements and reduced performance.

Moisture in sealed system chemically reacts withrefrigerant and oil to form corrosive hydrofluoric andhydrochloric acids. These acids attack motor windingsand parts, causing premature breakdown.

Equipment required to evacuate sealed system includes:

• High vacuum pump, capable of producing a vacuumequivalent to 25 microns.

• Thermocouple vacuum gauge capable of providingtrue readings of vacuum in system.

CAUTION!To avoid damage to compressor motor, never useair conditioner compressor as a vacuum pump orrun compressor when system is under high vacuum.

To evacuate sealed refrigeration system:

1. Connect vacuum pump, vacuum tight manifold setwith high vacuum hoses, thermocouple vacuumgauge and charging cylinder as shown in illustration.

2. Connect low side line to compressor process tube.

3. Connect high side line to process tube of liquid linestrainer.

NOTE: If a compression or flare fitting cannot beattached to process tube(s) and still leave roomfor a pinch-off, swage tube(s) and braze on anadditional length of tubing.

4. Start vacuum pump and open shut off valve to highvacuum gauge manifold only.

5. After compound gauge (low side) drops toapproximately 29 inches gauge, open valve tovacuum thermocouple gauge.

6. Ensure vacuum pump will blank-off to a maximum of25 microns.

NOTE: A high vacuum pump can only produce a goodvacuum if oil in pump is not contaminated.

7. If vacuum pump is working properly, close valve tovacuum thermocouple gauge.

8. Open high and low side valves of high vacuummanifold set. With valve on charging cylinder closed,open manifold valve to cylinder.

9. Evacuate system to at least 29 inches gauge. Openvalve to thermocouple vacuum gauge.

10.Continue to evacuate to a maximum of 250 microns.Close valve to vacuum pump and watch rate of rise:

• If vacuum does not rise above 1500 microns inthree (3) minutes, system can be consideredproperly evacuated.

• If thermocouple vacuum gauge continues to rise,then levels off above 5000 microns, moisture andnon-condensables are still present. Re-evacuate.

• If gauge continues to rise above 5000 microns, aleak is present. Locate, repair, and re-evacuate.

11.When system is properly evacuated, close valve tothermocouple vacuum gauge and vacuum pump.Shut off pump and prepare to charge system.



27 RS5100002 Rev. 0

Charging


NOTE: Charge system with exact amount of refrigerant.See Technical Sheet or refer to unit nameplatefor correct refrigerant charge. Inaccuratelycharged system will cause future problems.

To charge system:

NOTE: When using ambient compensated calibratedcharging cylinder, allow liquid refrigerant to enterhigh side only.

1. With no power applied to unit, allow liquid refrigerantto flow into system until no more refrigerant can beadded.

2. Close valve on high side of manifold.

3. Start (apply power to) system and charge to specifi-cation through low side. Do not charge through lowside in a liquid form.

4. Close low side valve on manifold and pinch-off bothprocess tubes. Remove manifold set, crimp shutopen ends of process tubes and braze.

5. Recheck for refrigerant leaks.

Refrigerant Precautions

WARNING!To avoid personal injury, do not allow refrigerant tocontact eyes or skin.

CAUTION!To avoid risk of property damage, do not userefrigerant other than that shown on unit serialnumber identification plate.

NOTE: All precautionary measures recommended byrefrigerant manufacturers and suppliers applyand should be observed.

Using Line Piercing ValvesLine piercing valves can be used for diagnosis, but arenot suitable for evacuating or charging due to holespierced in tubing by valves.

NOTE: Do not leave line piercing valves on system.Connection between valve and tubing is nothermetically sealed. Leaks will occur.

Open LinesDuring any processing of refrigeration system, neverleave lines open to atmosphere. Open lines allow watervapor to enter system, making proper evacuation moredifficult.



RS5100002 Rev. 0 28

Performance Tests

CAUTION!To avoid damage to air conditioner, do not runperformance tests when cover is off unit or unit isnot installed in mounting sleeve. Operation withcover/mounting sleeve removed changes designspecifications for air movement in the unit, resultingin overheating of fan motor and causing refrigerationsystem to become unbalanced.

Performance tests provide reasonable assurance a unitis operating correctly and within specifications. Bothperformance tests must be successfully completed toprovide this assurance. Perform tests after service, toverify a unit is operating within specifications. Tests canalso be run as a diagnostic aid prior to service (retestunit after servicing).

NOTE: Performance tests should not be run on installedunits when outside temperature is more than14°C (20°F) below room temperature at testinglocation.

Cooling Performance TestA common reason for inefficient cooling is reduced airmovement caused by a dirty condenser and/or air filter.Inspect both before performing following test, and cleanif necessary.

Best results are obtained when cooling test is conductedunder "peak load" conditions.

Using Cooling Performance Test ThermometersResults obtained from cooling performance test aredependent upon the thermometers used, how they arehandled, and where they are placed. To obtain accurate,reliable test results:

• Use two accurately calibrated refrigeration typethermometers, or a thermocouple potentiometer. Asling psychrometer is also required for this test.

• See Thermometer Testing Location diagram. Securethermometers to unit under test at locations 1 and 2using masking tape, wire, or other suitable retainers.

• Ensure temperature scale on thermometers arereadable without having to touch or movethermometers to do so.

1

2Placement:Down from top: 1 inchIn from side: 2 1/2 inch

Placement: Center of return air vent

Thermometer Testing LocationsTaking Sling Psychrometer ReadingsThe sling psychrometer obtains wet bulb temperaturesused to determine percent relative humidity.

To obtain wet and dry bulb temperature readings withsling psychrometer:

1. Apply power to unit under test. Place FAN CONTROLin high cooling position, TEMPERATURE CONTROLto coolest setting, and VENT CONTROL to closedposition. Run unit under test a minimum of 20minutes before any readings are taken.

2. Saturate wick on sling psychrometer with clean water,slightly below room temperature (saturate wick onlyonce during procedure).

NOTE: Ensure cold air blowing from unit under test isnot blowing on sling psychrometer during eitherreading.

3. Take psychrometer reading approximately 1.6 m infront of unit, approximately 1.2 m above floor. Recordresults.

4. Remove wick from sling psychrometer. Takepsychrometer reading at same location (as readingtaken in step 3). Record results (this is the slingpsychrometer dry bulb temperature).

2.5 cm6.4 cm

Performance Tests


29 RS5100002 Rev. 0

Performing Cooling Test1. Attach thermometers to unit under test at specified

locations (see paragraph Using CoolingPerformance Test Thermometers ).

2. Apply power to unit under test. Place FAN CONTROLin high cooling position, TEMPERATURE CONTROLto coolest setting, and VENT CONTROL to closedposition. Allow unit to run a minimum of 20 minutesbefore any readings are taken.

3. Record following temperatures:

A. Temperature at return air vent (Location 1 inThermometer Testing Location diagram).

B. Temperature at discharged vent (Location 2 inThermometer Testing Location diagram).

C. Wet bulb and dry bulb sling psychrometer read-ings (see paragraph Taking Sling PsychrometerReadings ).

NOTE: Dry bulb sling psychrometer reading should be±1 degree of temperature recorded at airconditioner return vent.

4. Calculate difference between temperature readingstaken in Step 3A and 3B (subtract temperaturerecorded in Step 3B from temperature recorded inStep 3A). Record results.

NOTE: The remaining steps explain how to determine ifunit under test is operating within specifications,using temperatures recorded in previous steps.See Cooling Dry Bulb Range Chart (onTechnical Sheet for unit under test) to completeremaining steps.

5. Under DRY BULB, in ROOM TEMPERATUREcolumn, find temperature nearest to the temperaturerecorded in Step 3A (for example, if temperaturerecorded in step 3A was 87°F, the nearesttemperature on chart would be 85°F). Use associatedwet bulb temperatures (shown in next column onchart) in following step.

6. Using wet bulb temperatures associated with dry bulbtemperature located in previous step, findtemperature on chart nearest to wet bulb slingpsychrometer reading obtained in Step 3C.

7. Note minimum (MIN) and maximum (MAX) valuesshown to right of associated dry bulb/wet bulbtemperatures.

Unit under test is within cooling specifications iftemperature difference calculated in Step 4 falls withinminimum and maximum values noted in Step 7. Unit isout of specifications if calculation from Step 4 is greateror less than values from Step 7. (See paragraphPerformance Test Diagnosis Guide for additionalinformation.)

Performance Tests


RS5100002 Rev. 0 30

Cooling Wattage Consumption TestTo perform cooling wattage consumption test:

1. Attach wattmeter to unit under test.

2. Turn unit under test on. Place FAN CONTROL in(normal) high cooling position, TEMPERATURECONTROL to coolest setting, and VENT CONTROLto closed position. Allow unit to run a minimum of 20minutes before any readings are taken.

3. Record outdoor temperature in vicinity of airconditioner.

NOTE: When recording outdoor temperature, avoidexposing thermometer to direct sunlight orcondenser discharge air.

4. Using sling psychrometer, record indoor wet bulbtemperature (see paragraph Taking SlingPsychrometer Readings ).

5. Record wattmeter reading.

NOTE: The remaining steps explain how to determine ifunit under test is operating within specifications,using figures recorded in previous steps. SeeCooling Wattage Input Chart (on TechnicalSheet for unit under test) to complete remainingsteps.

6. In OUTSIDE AIR ENTERING CONDENSER column(on chart), locate temperature nearest to temperaturerecorded in Step 3. Use associated room air wet bulbtemperatures (shown in next column on chart) infollowing step.

7. Using room air wet bulb temperatures associated withdry bulb temperature located in previous step, findtemperature on chart nearest to wet bulb slingpsychrometer reading obtained in Step 4.

8. Note minimum (MIN) and maximum (MAX) valuesshown to right of associated dry bulb/wet bulbtemperatures.

Unit under test is within wattage specifications ifwattmeter reading recorded in Step 5 falls withinminimum and maximum values noted in Step 8. Unit isout of specifications if calculation from Step 5 is greateror less than values from Step 8. (See paragraphPerformance Test Diagnosis Guide for additionalinformation.)

Performance Test Diagnosis GuideUse following chart to determine possible causes forperformance test failures.

Performance Test Results Possible Malfunctions

Cooling wattage and cooling range both Refrigerant charge low.below minimum requirement.

Starved indoor coil.

Sealed system leak.

Restricted capillary tube.

Weak (inefficient) compressor.

Cooling wattage and cooling range both Refrigerant over charged.exceed maximum requirement.

Slow indoor fan motor.

Cooling wattage below minimum requirement, Restricted air flow (dirty filter, dirty evaporator coil)cooling range exceeds maximum requirement.

Performance Tests


31 RS5100002 Rev. 0

The following paragraphs describe how to disassembleunit under test. Disassembly to some extent is requiredto install unit, to perform troubleshooting procedures, andto remove and replace faulty components.

Component names used throughout disassemblyprocedures are the same as those used in PartsManuals.

For quicker reassembly, disassemble unit under testonly to extent necessary to troubleshoot and repair.Reassembly is opposite of disassembly unless notedotherwise.

WARNING!The standard accepted color coding for earthingwires is green or green with a yellow stripe . Theseearthing wires are NOT to be used as currentcarrying conductors. Electrical components such asthe compressor and fan motor are earthed throughan individual wire attached to the electricalcomponent and to another part of the air conditioner.Earthing wires should not be removed fromindividual components while servicing, unless thecomponent is to be removed and replaced. It isextremely important to replace all removed earthingwires before completing service.

Horizontal Insert (Front Grille) and Air FilterRemovalTo remove horizontal insert and air filter:

1. Lift up on horizontal insert, then pull insert out andaway from front frame.

2. Remove air filter. If air filter is dirty, clean withvacuum, or hand wash. Ensure filter is completely drybefore reinstalling in unit.

Horizontal Insert and Air Filter Removal

Horizontal insert

Front frame

Filter

Disassembly Procedures


RS5100002 Rev. 0 32

Front Frame RemovalTo remove front frame:

1. Remove horizontal insert and air filter (see paragraphHorizontal Insert (Front Grille) and Air FilterRemoval ).

2. Remove control knobs by pulling straight out onknobs.

3. Remove four 1/4 inch screws (2 on top, 2 on bottom)securing front frame to air conditioner chassis.

4. Pull front frame out and away from air conditioner.

Front Frame Removal

Outer case RemovalTo remove outer case:

1. Remove front frame (see paragraph Front FrameRemoval ).

2. Remove 1/4 inch screw securing retaining clip locatedat bottom center on front of unit.

3 Slide (pull) air conditioner chassis out of outer caseassembly.

NOTE: New air conditioners are shipped with packingmaterial (rigid foam/plywood blocks) aroundcompressor, to prevent compressor damageduring shipment. Remove packing materialbefore operating unit.



Outer case Removal

Retainingclip

Frontframe

Controlknobs

33 RS5100002 Rev. 0

Fan Control RemovalTo remove fan control:

1. Remove outer case (see paragraph Outer caseRemoval ).

2. Disconnect wires from rear of switch.

NOTE: Before disconnecting or removing wires, alwaysnote position or location of wires. Ensure alldisconnected wires are reconnected to properlocation.

3. Remove two Phillips head screws securing fancontrol to control panel.

4. Pull fan control out and away from control panel.



Temperature Control RemovalTo remove temperature control:


2. Disconnect wires from rear of switch.


3. Remove strain relief clamp securing power cord tochassis.

4 Remove temperature sensing probe from two clipssecuring probe in front of indoor coil.

5. Remove two Phillips head screws securingtemperature control to control panel.

6. Pull temperature control and attached temperaturesensing probe out and away from control panel.

NOTE: Use care when removing temperature control,especially attached temperature sensor. Do notcrimp or break tubing between sensor andcontrol.

Temperature Control Removal

Control panel

Fan control

Fan Control Removal

Temperaturecontrol

Strainreliefclamp

Temperaturesensor

RS5100002 Rev. 0 34

Capacitor RemovalTo remove capacitor:


2. Discharge capacitor through 10,000 ohm resistor.

3. Disconnect wires attached to capacitor.


4. Remove 1/4 inch screw securing capacitor mountingstrap to partition panel.

5. Pull capacitor strap away from capacitor, then pullcapacitor out and away from chassis.

Capacitor Removal

Vent Control Assembly RemovalTo remove vent control assembly:


2. Remove top cover.

3. Remove 1/4 inch screw securing vent door to barriercontrol.

4. Remove 1/4 inch screw securing vent door slide tocontrol panel.

5. Lift vent control assembly out and away from chassis.

Vent Control Removal

Ventdoorslide

Partition panel

Top cover

Vent door

Capacitor

Capacitor strap



35 RS5100002 Rev. 0

Blower Wheel RemovalTo remove blower wheel:


2. Remove vent control assembly (see paragraph VentControl Assembly Removal ).

3. Remove two 1/4 inch screws securing externalpartition panel to partition panel, then remove externalpartition panel.

4. Remove two 1/4 inch screws securing inlet panel toheater shield, then remove inlet panel.

5. Remover electric heater assembly (on units soequipped) (see paragraph Electric Heater AssemblyRemoval ).

NOTE: Blower wheel is secured to fan motor shaft by an"O" clamp. "O" clamp is tightened in place by a5/32 inch hex head screw. A cutout in one fin ofblower wheel allows access to hex head screwusing a long (6 inch) 5/32 inch hex driver.

6. Loosen 5/32 inch hex screw securing "O" clamp toblower wheel/fan motor shaft.

7. Pull blower wheel off fan motor shaft.

NOTE: When installing blower wheel, ensure "O" clampand hex head screw are aligned so screw can betightened from access hole in blower wheel.

Inlet panel

"O" clamp

Hex screw

Blower wheel

Fan motor shaft

Externalpartitionpanel

Blower Wheel Removal



RS5100002 Rev. 0 36

Condenser Fan and Fan Motor RemovalTo remove condenser fan (includes attached slinger ring)and fan motor:

NOTE: To remove condenser fan only, perform steps 1through 7. Perform all steps to remove fanmotor.

1. Remove blower wheel (see paragraph Blower WheelRemoval ).

2. Remove two 1/4 inch screws securing tie brace topartition panel, then remove brace by lifting up andback.

3. Remove two 1/4 inch screws securing side brace topartition panel and two 1/4 inch screws securing sidebrace to condenser assembly (4 screws total).Remove side brace.

4. Evacuate sealed system (see paragraph Evacuation ,in Troubleshooting Information section.


5. Remove condenser assembly (see paragraphCondenser Removal ).

NOTE: Condenser fan is secured to fan motor shaft byan "O" clamp. "O" clamp is tightened in place bya 5/32 inch hex head screw.

6. Loosen 5/32 inch hex screw securing "O" clamp tocondenser fan/fan motor shaft.

7. Pull condenser fan off fan motor shaft.

8. Disconnect fan motor leads:

• Brown and white leads attach to capacitor.

• Red, blue, and black leads attach to fan control.

9. Pull fan motor leads through routing hole on partitionpanel.

10.Remove three 3/8 inch tap screws securing fan motorto partition panel. Lift motor up and away fromchassis.

Hex screwTiebrace

Side brace

Condenserfan

Fanmotor

"O" clamp

Condenserassembly

Condenser Fan and Fan Motor Removal



37 RS5100002 Rev. 0

Condenser RemovalTo remove the condenser:


2. Remove two 1/4 inch screw securing top coverassembly to partition panel, then remove top coverassembly.

3. Remove two 1/4 inch screws securing tie brace topartition panel, then remove brace by lifting up andback.

4. Remove two 1/4 inch screws securing side brace topartition panel and two 1/4 inch screws securing sidebrace to condenser assembly (4 screws total).Remove side brace.

5. Evacuate sealed system (see paragraph Evacuation ,in Troubleshooting Information section).



6. Unbraze condenser suction connection tocompressor.

7. Unbraze condenser connection to capillary tube.

8. Remove two 1/4 inch screws securing condenser tobase pan.

9. Remove condenser and condenser shroud fromchassis.

10.Remove two 1/4 inch screws securing condensershroud to condenser, then remove shroud fromcondenser.

Tie brace Condenser and shroud

Topbrace

Top Cover



Condenser Removal

RS5100002 Rev. 0 38

Compressor RemovalTo remove compressor:


2. Remove compressor overload protector (seeparagraph Compressor Overload ProtectorRemoval ).

3. Disconnect compressor leads.

4. Pull compressor leads through routing hole onpartition panel.




6. Unbraze compressor suction tube connection tocondenser (outside coil).

7. Unbraze compressor discharge tube connection toevaporator (indoor coil).

8. Remove three 3/8 inch screws securing compressorto base pan.

9. Lift compressor up and away from chassis.Compressor Removal

Compressor

Capillary tube

Dischargetube

Suctiontube



39 RS5100002 Rev. 0

Evaporator (Indoor Coil) RemovalTo remove the evaporator:






4. Unbraze evaporator discharge tube connection tocompressor.

5. Unbraze evaporator connection to capillary tube.



8. Remove temperature sensing probe from two clipssecuring probe in front of indoor coil.

9. Remove two 1/4 screws securing evaporator to leftside of partition panel.

10.Remove two 1/4 inch screws securing top front ofevaporator.

11. Remove two 1/4 screws securing bottom front ofevaporator to base pan.

12.Remove 1/4 inch screw securing evaporator tocontrol panel.

Evaporator Removal

Discharge tubeconnection

Top cover

External partitionpanel

Capillary tube connection

Evaporator

Inlet panel



RS5100002 Rev. 0 40

Top cover

Inlet panel

Heater shield

Heater assembly

Electric Heater Assembly RemovalTo remove the electric heater assembly:





5. Disconnect electric heater leads:

• One lead attaches to capacitor.

• Second lead attaches to fan control.

6. Remove two 1/4 inch screws securing heaterassembly to evaporator.

7. Lift electric heater assembly up and out of chassis.

8. Remove 1/4 inch screw securing heater assembly toheater shield, then separate heater from shield.

Electric Heater Assembly Removal

Externalpartitionpanel

Compressor Overload Protector RemovalTo remove compressor overload protector:


2. Remove 5/16 inch nut securing protective cover tocompressor, then lift protective cover up and awayfrom compressor.

3. Disconnect overload protector leads.

4. Lift overload protector up and away from compressor.

Compressor Overload Protector Removal

Protector cover

Overloadprotector



Date post:	21-May-2018
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