Friedrich 2009, 2008 User Manual

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Service Manual

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WallMaster® Thru-the-Wall

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Models 2009 2008

TECHNICAL SUPPORT

CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Ofce Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

Table Of Contents

Important Safety Information ....................................................................................................................2-4

Introduction ..................................................................................................................................................4

WallMaster Model Number Code and Serial Number Identication ............................................................5

Performance Data / Sleeve and Chassis Dimensions .................................................................................6

Electrical Data ..............................................................................................................................................7

Functional Components ...............................................................................................................................8

How to Operate the Electronic WallMaster Room Air Conditioner ..........................................................9-10

Remote Control ..........................................................................................................................................11

Electronic Control: Operation, Testing, Error Codes, Rebooting ..........................................................12-13

How to Operate the WallMaster with Rotary Controls, Control Testing ......................................................14

Electronic Control Heat Pump Operation ...................................................................................................15

Components Testing ..............................................................................................................................15-17

Refrigeration System Sequence of Operation ............................................................................................18

Sealed System Refrigeration Repairs / Charging ..................................................................................19-22

Hermetic Components Check ................................................................................................................23-26

Reversing Valve Description/Operation ......................................................................................................24

Testing the Coil and Reversing Valve ....................................................................................................25-26

Compressor Checks ..............................................................................................................................27-28

Compressor Replacement .....................................................................................................................29-30

Routine Maintenance .............................................................................................................................31-32

General Troubleshooting .......................................................................................................................33-39

Wiring Diagrams ....................................................................................................................................40-44

Installation Accessories ..............................................................................................................................45

Installation Instructions for “WSC” Sleeve .............................................................................................46-47

Installation Instructions for Bafe Adapter Kit .............................................................................................48

Seal Gasket Installation Instructions ...........................................................................................................49

Installation Instructions for Internal Drain Kit (IDK) .....................................................................................50

Assembly and Installation Instructions for Drain Kit (DK) ...........................................................................51

Installation Instructions for Sub-Base .........................................................................................................52

Installation Instructions for Architectural Grille Model AG-48-49 ...........................................................53-54

Warranty .....................................................................................................................................................55

IMPORTANT SAFETY INFORMATION

The information contained in this manual is intended for use by a qualied service technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.

Installation or repairs made by unqualied persons can result in subjecting the unqualied person making such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical shock which can be serious or even fatal.

Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered. If you install or perform service on equipment, it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others.

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

and obey all safety messages.

WARNING

CAUTION

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,

and tell you what will happen if the instructions are not followed.

NOTICE

Your safety and the safety of others are very important.

This is a safety Alert symbol.

This symbol alerts you to potential hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol with the word “WARNING”

or “CAUTION”. These words mean:

You can be killed or seriously injured if you do not follow instructions.

You can receive minor or moderate injury if you do not follow instructions.

A message to alert you of potential property damage will have the

word “NOTICE”. Potential property damage can occur if instructions

are not followed.

PERSONAL INJURY OR DEATH HAZARDS

ELECTRICAL HAZARDS:

Unplug and/or disconnect all electrical power to the unit before performing inspections, • maintenance, or service.

Make sure to follow proper lockout/tag out procedures.•

Always work in the company of a qualied assistant if possible. •

Capacitors, even when disconnected from the electrical power source, retain an electrical charge • potential capable of causing electric shock or electrocution.

Handle, discharge, and test capacitors according to safe, established, standards, and approved • procedures.

Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary • to test or troubleshoot equipment with the power on to the unit.

Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, • and sleeve on the room side of the air conditioning unit while cleaning.

Electrical component malfunction caused by water could result in electric shock or other electrically • unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.

Never operate the A/C unit with wet hands.•

Use air conditioner on a single dedicated circuit within the specied amperage rating. •

Use on a properly grounded outlet only.•

Do not remove ground prong of plug.•

Do not cut or modify the power supply cord.•

Do not use extension cords with the unit.•

Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, • goggles, clothing, adequately insulated tools, and testing equipment etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •

REFRIGERATION SYSTEM HAZARDS:

Use approved standard refrigerant recovering procedures and equipment to relieve pressure before • opening system for repair.

Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor • to moderate injury.

Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s ame or hot • surfaces can cause serious burns.

Make sure to protect personal and surrounding property with re proof materials.•

Have a re extinguisher at hand while using a torch.•

Provide adequate ventilation to vent off toxic fumes, and work with a qualied assistant whenever • possible.

Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for • leaks, ushing etc.

Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves, • safety glasses, clothing etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •

MECHANICAL HAZARDS:

Extreme care, proper judgment and all safety procedures must be followed when testing, • troubleshooting, handling, or working around unit with moving and/or rotating parts.

Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and • other unit components especially the sharp ns of the indoor and outdoor coils.

Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.•

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•

PROPERTY DAMAGE HAZARDS

Return Air Grille

Decorative Front

WSC

Sleeve

AB123456C3567

MODEL# WS07A10B

Airflow

Rotate

Discharge Grille

1" Diameter Plug

FIRE DAMAGE HAZARDS:

Read the Installation/Operation Manual for this air conditioning unit prior to operating.•

Use air conditioner on a single dedicated circuit within the specied amperage rating. •

Connect to a properly grounded outlet only.•

Do not remove ground prong of plug.•

Do not cut or modify the power supply cord.•

Do not use extension cords with the unit.•

Failure to follow these instructions can result in re and minor to serious property damage.•

WATER DAMAGE HAZARDS:

Improper installation maintenance, or servicing of the air conditioner unit, or not following the above • Safety Warnings can result in water damage to personal items or property.

Insure that the unit has a sufcient pitch to the outside to allow water to drain from the unit. •

Do not drill holes in the bottom of the drain pan or the underside of the unit. •

Failure to follow these instructions can result in result in damage to the unit and/or minor to serious • property damage.

INTRODUCTION

This service manual is designed to be used in conjunction with the installation manuals provided with each unit.

This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product.

This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).

IMPORTANT:

It will be necessary for you to accurately identify the unit you are servicing, so you can be certain of a proper diagnosis and repair.

(See Unit Identication.)

1” Diameter Plug

FRIEDRICH WALLMASTER MODEL NUMBER CODE

W S 08 B 1 0 B

1st DIGIT - FUNCTION

W = Thru-The-Wall, WallMaster Series

2nd DIGIT - TYPE

S = Straight Cool E = Electric Heat Y = Heat Pump

3rd & 4th DIGITS - APPROXIMATE BTU/HR (Cooling)

Heating BTU/HR capacity listed in Specications/Performance Data Section

5th DIGIT - ALPHABETICAL MODIFIER

6th DIGIT - VOLTAGE

1 = 115 Volts 3 = 230-208 Volts

7th DIGIT

0 = Straight Cool & Heat Pump Models

ELECTRIC HEAT MODELS

3 = 3 KW Heat Strip, Nominal

8th DIGIT

Major Change

SERIAL NUMBER IDENTIFICATION GUIDE

Serial Number Decade Manufactured

L=0 C=3 F=6 J=9

A=1 D=4 G=7

B=2 E=5 H=8

Year Manufactured

A=1 D=4 G=7 K=0

B=2 E=5 H=8

C=3 F=6 J=9

Month Manufactured

A=Jan D=Apr G=Jul K=Oct

B=Feb E=May H=Aug L=Nov

C=Mar F=Jun J=Sept M=Dec

L C J R 00001

Production Run Number

Product Line

X = WallMaster

2008 / 2009 PERFORMANCE DATA

ENERGY STAR

modelsSpecifications

Model

Cooling

Capacity

BTU/h

Heating

Capacity

BTU/h

Volts

Rated

Cooling

Amps

Cooling

Watts

Heating

Amps

Heating

Watts

Energy

Eciency

Ratio

EER

Moisture Removal Pints/Hr.

Room

Side Air

Circulation Sleeve

Weight

Lbs.

Ship/Net

WALLMASTER

WS08B10A 8000 — 115 6.8 762 — — 10.5 1.3 245 WSC 97/93

WS10B10A 10000 — 115 8.7 954 — — 10.5 2.4 245 WSC 107/103

WS14B10A 13500 — 115 12.0 1415 — — 9.5 3.3 295 WSC 116/112

WS10B30A 10000/10000 — 230/208 4.6/5.0 1005/996 — — 10.0/10.0 2.1 260 WSC 105/101

WS13B30B 12500/12000 — 230/208 6.3/6.7 1404/1379 — — 8.9/8.7 3.3 280 WSC 113/109

WS16B30A 15800/15000 — 230/208 7.8/8.5 1756/1705 — — 9.0/8.8 4.2 290 WSC 123/119

WE10B33C 10000/10000 11000/9100 230/208 4.6/5.0 1005/996 16.0/14.7 3550/2950 10.0/10.0 2.1 260 WSC 107/103

WE13B

33C 12500/12000 11000/9100 230/208 6.3/6.7 1404/1379 16.0/14.7 3550/2950 8.9/8.7 3.3 280 WSC 115/111

WE16B33C 15800/15000 11000/9100 230/208 7.8/8.5 1756/1705 16.0/14.7 3550/2950 9.0/8.8 4.2 290 WSC 125/121

WY10B33C 10100/9800 8100/7800 230/208 4.6/4.8 1013/976 3.9/4.0 857/821 10.0/10.0 2.5 230 WSC 111/107

WY13B33C 12500/12100 10400/10000 230/208 6.4/6.8 1389/1352 5.4/5.7 1182/1136 9.0/9.0 3.2 280 WSC 120/116

EVAPORATOR AIR

COOLING

PERFORMANCE

DATA*

WS08B10A-D 55 25 55 55 127 165 61 102 18 25 87 281 7.1 36.2 20.5 257 1100 15 WS08B10A-F 55 25 55 55 125 179 74.5 102 18 25 87 281 6.9 36.2 18.9 257 1100 15 WS10B10A-D 52 28 53 51 128 176 68 105 16 24 79 293 9.0 45.0 22.0 248 1100 15 WS14B10A-D 52 28 52 52 128 179 63 99 14 28 82 297 12.4 58.0 44.9 293 1300 15 WS14B10A-E 52 28 52 52 128 179 63 99 14 28 82 297 12.4 58.0 44.9 293 1300 15 WS10B30A-D 55 25 53 57 131 179 68 106 16 23 77 289 4.6 26.0 22.5 235 1100 15 WS13B30B-E 50 30 52 50 131 180 61 103 13 24 81 305 6.9/6.5 27.4 36.5 288 1280 15 WS13B30B-F 50 30 52 50 131 180 61 103 13 24 81 305 6.9/6.5 27.4 36.5 288 1280 15 WS16B30A-D 52 28 51 53 121 154 54 99 18 32 74 315 7.7 35.0 47.6 292 1421 15 WS16B30A-E 52 28 51 53 121 154 54 99 18 32 74 315 7.7 35.0 47.6 292 1421 15 WE10B33A-C 53 27 54 52 126 180 82 99 16 31 82 289 4.6 15.2 45.0 38.0 225 1074 20 WE10B33C-A 53 27 54 52 126 180 82 99 16 31 82 289 4.6 15.2 45.0 38.0 225 1074 20 WE13B33B-D 50 30 52 50 131 180 61 103 13 24 81 305 6.9/6.5 15.7 27.4 36.5 288 1280 20 WE13B33C-A 50 30 52 50 131 180 61 103 13 24 81 305 6.9/6.5 15.7 27.4 36.5 288 1280 20 WE13B33B-E 50 30 52 50 131 180 61 103 13 24 81 305 6.9/6.5 15.7 27.4 36.5 288 1280 20 WE16B33A-C 52 28 51 53 121 174 57 100 18 30 74 315 6.5 16.1 35.0 35.2 281 1305 20 WE16B33C-A 52 28 51 53 121 174 57 100 18 30 74 315 6.5 16.1 35.0 35.2 281 1305 20 WE16B33A-D 52 28 51 53 121 174 57 100 18 30 74 315 6.5 16.1 35.0 35.2 281 1305 20 WY10B33A-C 53 27 54 52 WY10B33C-A 53 27 54 52 126 180 66 99 16 31 82 225 4.6 4 / 15.2 26.0 38.0 225 1074 20 WY10B33A-D 53 27 54 52 126 180 66 99 16 31 82 225 4.6 4 / 15.2 26.0 38.0 225 1074 20

WY13B33A-C 52 29 52 51 127 180 64 103 16 29 80 300 6.5 5.6 / 15.7 27.4 35.0 260 1200 20 WY13B33C-A 52 29 52 51 127 180 64 103 16 29 80 300 6.5 5.6 / 15.7 27.4 35.0 260 1200 20

WY13B33A-D 52 29 52 51 127 180 64 103 16 29 80 300 6.5 5.6 / 15.7 27.4 35.0 260 1200 20

* Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity

TEMP. DEG. F

Discharge

Air

EVAPORATOR TEMP.

DEG. F

Temp.

T(in) T(out) Suction Discharge Amps Cool Amps Heat

Drop F.

CONDENSER

TEMPERATURE

DEG. F

Discharge

Suction

Liquid

Temp

126 180 66 99 16 31 82 225 4.6 4 / 15.2 26.0 38.0 225 1074 20

Temp

Super Heat

Sub-

Cooling

OPERATING

PRESSURES

ELECTRICAL RATINGS R-22 REF.

Locked Rotor

Amps

Charge in

OZ.

Evap CFM

Motor

RPM

BREAKER

FUSE

60 Hertz

Amps

Sleeve / Chassis Dimensions

Thru- the-wall Finishe d Hole

Height Width

Model Height Wid th Depth

WSC Sleeve Chassis

16 3/4" 27" 16 3/4" 23" 7 1/2" 9/16" 17 1/4" 27 1/4"

15 3/4" 26 1/2" 21" – – – – –

Depth

with

Front

Minimum Exten sion

Into Room

Minimum

Exten sion

Outside

ELECTRICAL DATA

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

All electrical connections and wiring MUST be installed by a qualied electrician and conform to the National Electrical Code and all local codes which have jurisdiction.

Failure to do so can result in personal injury or death.

NOTICE

FIRE HAZARD

Not following the above WARNING could result in re or electically unsafe conditions which could cause moderate or serious property damage.

Read, understand and follow the above warning.

Wire Size Use ONLY wiring size recommended for single outlet branch circuit.

Fuse/Circuit Breaker Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s

rating plate. Proper circuit protection is the responsibiity of the homeowner.

Grounding Unit MUST be grounded from branch circuit through service cord to unit, or through separate

ground wire provided on permanently connected units. Be sure that branch circuit or general purpose outlet is grounded.

Receptacle The eld supplied outlet must match plug on service cord and be within reach of service cord.

Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above for proper receptacle and fuse type.

Plug/Outlet/Circuit Rating

Model Numbers

WS08 B10A, WS10B10A, WS14B10A

WS10B30A , WS13B30A, WS16B30A

WE10, WE13, WE16 WY10, WY13

Circuit Rating

Breaker or T-D Fuse

125V - 15A 5 - 15P

250V - 15A 6 - 15P

250V - 20A 6 - 20P

Plug Face

(NEMA#)

Wall Outlet

Appearance

The consumer - through the AHAM Room Air Conditioner Certication Program - can be certain that the AHAM Certication Seal accurately states the unit’s cooling and heating capacity rating, the amperes and the energy efciency ratio.

*HACR: Heating Air Conditioning and Refrigeration

FUNCTIONAL

MPONENT

A. Mechanical components

Drain pan valve Temperature-sensitive valve that opens up to drain off condensate water when the outside temperature falls below 40°F and closes when the outside temperature reaches 60°F

ffuse

r with directional louver

s used to direc

t th

e cond

ition

ed airﬂow.

wer w

heel

Attaches to the indoor side of the fan motor shaft and is used for distributing unconditioned, room side air though the heat

xchanger and delivering conditioned air into the room

Attaches to the outdoor side of the fan motor shaft and is used to move outside air through the condenser coil, while slinging condensate water out of the base pan and onto the condenser coil, thus lowering the temperature and pressures within th

e coil.

.Electrical component

Thermost

sed to maintain the speciﬁ ed room side comfort leve

sed to regulate the operation of the fan motor, the compressor or to turn the unit off. For troubleshooting, refer to the

wiring diagrams and schematics in the back of this service manual

educes line current and steadies the voltage supply, while greatly improving the torque characteristics of the fan motor

and compressor motor.

switch

When engaged, it sends the power supply to the fan motor through the thermostat, which allows for a cycle-fan operation

nMotor

ual-shafted fan motor operates the indoor blower wheel and the condenser fan blade simultaneously.

lenoi

sed to energize the reversing valve on all heat pump units.

lectric resistance heater

sed to providebetter thermostat and room air temperature control.

C. Hermetic components

otorized device used to compress refrigerant through the sealed system.

Afour-way switching device used on all heat pump models to change the ﬂ ow of refrigerant to permit heating or cooling.

heck valv

A pressure-operated device used to direct the ﬂ ow of refrigerant to the proper capillary tube, during either the heating or

ooling cycle

p y

A cylindrical meter device used to evenly distribute the ﬂ ow of refrigerant to the heat exchangers (coils.

)

How to operate the Friedrich WallMaster

To start unit

,elc at pec er reporp a otni deggulp dna dellatsni si renoitidnoc ria ruoy fI it is ready to go. The rst time the unit is started, the compressor will delay for three minutes. See Automatic Component Protection on the following page.

Touch the Power button once. The unit will automatically be in Cool mode with the temperature set at 75°F (24°C) and the fan speed at F1, the sleep setting.

To set mode of operation

When you rst turn the unit on, it will be in the Cool mode with constant fan.

On WS cool-only models, touch the Mode buton once to activate the MoneySaver

( WS models only. S ee item 14 for Money Saver

instructions on WY/WE models).

MoneySaver

is a feature that cycles the fan with the com pres -

sor so that the fan does not run all the time. This saves energy

i dim uh ed sevorpmi dna

revaSyenoM .noit ac

will also run to test

the temperature if the off cycle is too long. Or you may prefer

,naf tnatsnoc ot nruter oT( .tnem evom ria erom rof naf tnats noc

touch the Mode button two more times).

In order to run the fan by itself, do the following:

On WY/WS heat-cool models, touch the Mode button once to

activate the Fan Only feature. The Fan O nly setting w ill circulate air in the room without the compressor coming on.

Continuing from MoneySaver

mode, touch the Mode button

once to activate the Fan Only feature (WS cool-only models).

To adjust temperature

Use the Mode b utton to s elect either the Cool or MoneySaver

function (or Heat for WY/WE heat-cool models)

COOLER – Touch the

button to lower the room air temperature.

Figure 1: WS Model cool-only control panel Figure 2: WY/WE Model heat-cool control panel

2 3 4

10 11 12

WARMER – Touch the

Smart Fan

Money

Press both the

Power

Set

Cool

Fan Only

Heat

Clock

Start Time

Stop Time

Temp/Hour

Fan

Speed

Timer

On/Off Saver

Mode

button to raise the room air temperature.

and buttons at the same time to switch the temperature from Fahrenheit (°F) to Celsius (°C). Repeat Step 7 to switch from °C back to °F.

To adjust fan speed

Touch the Fan Speed button to see the current setting. To uch

it again t o change s peed. F1 i s the lowest setting (SLEEP

SETTING / LOW), F2 is MEDIUM, and F3 is HIGH.

To activate Smart Fan (WS cool-only models)

There is a fourth option, SF, when selecting the fan speed. This is

the SMART FAN function. SMART FAN DOES NOT OPERAT E IN CONJUNCTION WITH THE FAN ONLY MODE.

To activate Smart Fan (WY/WE heat-cool models)

Press the Smart Fan button to activate the Smart Fan. The light

will indicate that this feature is in use.

Smart Fan will adjust the fan speed automatically to maintain the desired comfort level. For example, if the outside doors in your home are opened for an extended period of time, or more people enter a room, Smart Fan may adjust to a higher fan speed to compensate for the increased heat load. This keeps you from having to adjust the fan speed on your own.

To set the hour clock

Touch the Set Hour b utton to see the c urrent s etting. T he

.)ylno ruoh( emit etamixorppa eht si deyalpsid si taht rebmun

Use the

TO SET A.M. AND P. M. ACCORDINGLY. (P. M. is indicated by

a red light in the upper left corner of the display).

and buttons to change the settings. BE SURE

To set the timer

NOTE: Set the HOUR CLOCK (Set Hour) before attempting to set timer functions.

NOTE: If the unit is unplugged or the power is interrupted, the HOUR must be reset or the Timer On/Off will not function when desired.

You can set the Start Time and Stop Time a minimum of one hour

apart, and a maximum of 23 hours apart.

After setting the time, press the Set Hour button once (Start

light on). Use the

unit will START.

After selecting the Start Time, press the Set Hour button once.

(Stop Light on). Use the that the unit will STOP. After selecting the stopping time, press

and

buttons to select the time

the Set Hour button once.

Press the Timer On/Off button (light turns on) to activate the

timer function. To deactivate this function, press the Timer On/ Off button once again (light turns off). Once the on and off times have been selected, they will remain in memory and cycle daily until changed.

Automatic component protection

Your unit is equipped with Automatic Component Protection.

To protect the c ompressor of the unit, there is a three minute delay if you turn the unit off or if power is interrupted. The fan will not be affected. Also, if you switch from Cool mode to Fan Only mode, and switch back to Cool mode, there is a three-minute delay before the compressor comes back on.

To Activate Money Saver (WY/WE models)

Press the Money Saver button to activate the M oney S aver

feature. The light will indicate the Money Saver is in use.

eht taht emit eht tceles ot snottub

MoneySaver

sor so that the fan does not run all the time. This saves energy

the temperature if the off cycle is too long. Or you may prefer

touch the Mode button two more times).

is a feature that cycles the fan with the com pres

i fidim uh ed sevorpmi dnarevaSyenoM .noit ac

will also run to test

,naf tnatsnoc ot nruter oT( .tnem evom ria erom rof naf tnats noc

Figure 3: WY/WE heat-cool model remote control

Additional RC1 wireless remote controls can be purchased from your Friedrich dealer.

Using the remote control

Figure 4: WS Models Only

Additional RC1 wireless remote controls can be purchased from your Friedrich dealer.

To start unit

POWER - Press the Power button once. The unit will automatically start in the mode and fan speed it was last left on.

To set mode of operation

COOL - Press the Cool button to automatically switch the operat- ing mode to COOL.

FAN ONLY - Press the Fan Only button if you want to run the fan only.

HEAT (WY/WE m odels only) - P ress the Heat button to automatically switch the operating mode to HEAT.

MoneySaver

the MoneySaver compressor so that the fan does not run all the time.

- Press the Money Saver

feature. This feature cycles the fan with the

button to activate

To adjust temperature

WARMER - Press the

COOLER - Press the

Warmer button to raise the temperature sett

Cooler button to lower the temperature se

To adjust fan speed

FAN SPEED - Press the Fan Speed button to see the current setting. Press again to change the fan speed. F1 is the lowest setting (SLEEP / LOW), F2 is MEDIUM, F3 is HIGH, and SF is the SMART FAN setting.

To set the hour clock

SET HOUR CLOCK - Press the Set Hr. button once to see the current clock setting. Continue pressing the button until y ou arrive at the current time (Hour only). Minutes are not shown on the display. Make sure that the A.M. / P. M. setting is correct.

To set the timer

NOTE: You can set the START and STOP times a minimum of one hour apart, and a maximum of 23 hours apart.

TIMER START - Press Start to view the current start time for cool- ing. Continue pressing the START button until you arrive at the start time you desire. The start time for cooling will then be set.

TIMER STOP - Press the Stop button. Continue pressing the STOP button until you arrive at the stop time you desire. The stop time for cooling will then be set.

TIMER ON / O FF - P ress the O n/Off button (under Timer

ing.

Operation .remit eht )ffo thgil( etavitcaed ro )no thgil( etavitca ot ) Once the on and off times have been selected, they will remain in memory and cycle daily until changed.

NOTE: If the unit is unplugged or the power is interrupted, the Set Hr. function must be reset or the Timer On/Off function will not work.

ELECTRONIC CONTROL PANEL

Temp/Hour

Cool

Money Saver

Fan Only

Clock

Start Time

Stop Time

Power

Fan

Speed

Mode

Timer

On/Off

Set

Hour

Figure 5: “WS” Cooling only models

Electronic Control Panel

TESTING THE ELECTRONIC CONTROL

CHECKING ROOM TEMPERATURE

1. Check the room temperature at the electronic control

pad by pressing at the same time, the Fan Speed button and the Temp/Hour button on the WS/WE/ WY models (see gures 5 and 6).

2. The indoor temperature will display for 10 seconds. Indoor temperature can be viewed in all modes, including the Test Mode. The display can be changed back to the SET temperature by pressing any key (except the Power (on/off button) or it can do so automatically after 10 seconds have elapsed.

Figure 6: “WE”/”WY” heat/cool models

Electronic Control Panel

The LEDs for Set/Hour: “Star t Tim e” and “Stop Time” will blink 1 bps while Test Mode is active.

Test Mode has a duration of 90 minutes. Test Mode can be activated under any function, including Off. Test Mode is cancelled by pressing the Power (on/off) button, unplugging the unit, or when the 90 minutes times

out.

Test Mode settings are factory default of: Unit operation On, MoneySaver On, Cool Mode, 60 degrees F, speed fan on High. “Timer” and “Set Hour” features are non-functional.

ACTIVATING TEST MODE

Activate Test Mode by press ing at th e same tim e, the Mode button and the Temp/Hour button on on the WS/WE/ WY models (see gures 5 and 6).

ERROR CODE MODE

Error Code Mode is used to display all error codes stored since reset. It is a sub-mode of Test Mode. Unit must be in Test Mode to enter the Error Code function.

Activating Error Code Mode: Press the TIMER On/ Off” button on the WS/WE/WY models (see gures 5

and 6). The LED for the TIMER On/Off will ash 1 bps (beats per second) while Error Code Mode is active. Pressing the Temp/Hour button will display “00”. Consecutive presses will scroll through all error codes stored. Press the Temp/Hour button to see the reverse order of the error codes. When the end of the stored error codes is reached the temperature Set Point will appear. (Each error code is listed once)

Test Mode overrides the three minute compressor Lockout, all delays for fan motor start, speed change, and when switching modes.

Exiting Error Code Mode: press the Timer On/Off button.

Clearing Error Codes: Error codes are cleared from the memory by exiting from Error Code Mode.

MEMORY: On WS/WE/WY

The electronic control has a memory to retain all functions and settings, as set up by the user, in the event of a power failure. For example: once power is restored to the unit, there is a two second delay before the fan comes on and approximately three minutes delay before the compressor is activated providing that the mode was set for cooling and the set point temperature has not been met in the room.

ERROR CODES LISTING FOR “WS” MODELS

E1 SHORT CYCLE SITUATION: Dened as a

compressor that starts and stops more frequently than it should.

E2 KEYBOARD STUCK ERROR: If any key button

is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignored until released. If the “Mode” key is stuck, the unit’s function will default to Cool mode.

E3 FROST PROBE OPEN: Normal operation is

allowed. Ohm frost probe. Replace if Ohm value not read. If Ohm value is present replace the board.

E4 FROST PROBE SHORT: Normal operation is

allowed. Replace probe.

E5 INDOOR PROBE OPEN: Control assumes

indoor ambient temperature is 90 degrees F and unit will operate. Ohm indoor probe. Replace probe if Ohm value is not present.

E6 INDOOR PROBE SHORT: Control assumes

ambient temperature is 90 degrees F and unit will operate. Replace probe.

(See note and other infomation below)

ERROR CODES LISTING FOR “WE/WY” MODELS

E1 SHORT CYCLE SITUATION: Dened as a

compressor that starts and stops more frequently than it should.

E2 KEYBOARD STUCK ERROR: If any key button

E3 AMBIENT (INDOOR) AIR PROBE OPEN

OR SHORT: Control will assume ambient temperature is 90 degrees F when in Cool mode and 60 degrees F when in Heat mode. Unit will operate (see note below).

E4 EVAPORATOR TEMPERATURE PROBE

OPEN OR SHOR T: Normal operation is allowed.

Replace probe (see note below).

E5 CONDENSER TEMPERATURE PROBE

OPEN OR SHOR T: Normal operation is allowed.

Replace probe.

E7 MOTOR OPERATION

E9 HEAT PUMP FAILURE

NOTE: All error codes display for probes open or shorted will

allow unit to operate. Unit may ice up if faulty components are not replaced.

Indoor Coil Frost Probe Sensor (WS/WE/WY Models):

Disables compressor at 30 degrees F+/- 3 degrees F. Compressor resumes operation when indoor coil temperature reaches 55 degrees F.

Outdoor Coil Frost Probe Sensor (on WY models):

Disables the compressor at 30 degrees F. Compressor resumes operation when temperature reaches 43 +/- 5 degrees F.

Indoor Air Probe Sensor (WS/WE/WY Models)”:

Control range is 60 degrees F to 90 degrees F +/- 3 degrees F.

REBOOT THE CONTROL PANEL

To reboot the control panel on a WallMaster unit: with the unit on, simultaneously hold down the Mode button and the Temperature Arrow button for approximately 10 seconds. If the panel will reboot, you will hear the fan come on and the temperature window will read 60 degrees. If this happens, all you need to do is turn the unit off for about 10 seconds and then turn it back on to nish the reboot cycle. If the panel does not reboot, you will most likely need to have the panel replaced.

Figure 8: System Control Switch

(Heat Pump & Electric Heat Models)

Fan

Only

Off

Low Cool

Low Heat

Med Cool

Med Heat

High Heat

High Cool

MAX

HEAT

MAX

COOL

Allow 3 min. between restarts

SYSTEM CONTROL SWITCH - TEST

Disconnect leads from control switch. Turn control to position being tested (see Figure 8). There must be continuity as follows:

1. “Off” Position-no continuity between terminals.

2. “Lo Cool” Position-between terminals “C” and “3”, “C2” and “2”, “LO” and “M/S”, “AR” and “5”.

3. “Med Cool” Position-between terminals “C” and “3”, “C2” and “2”, “M” and “M/S”, “AR” and “5”.

4. “Hi Cool” Position-between terminals “C” and “3”, “C2” and “2”, “H” and “M/S”, “AR” and “5”.

5. “Hi Heat” Position-between terminals “C” and “1”, “C2” and “4”, “H” and “M/S”, “AR” and “5”.

6. “Med Heat” Position-between terminals “C” and “1”, “C2” and “4”, “M” and “M/S”, “AR” and “5”.

7. “Lo Cool” Position-between terminals “C” and “1”, “C2” and “4”, “LO” and “M/S”, “AR” and “5”.

8. “Fan Only” Position-between terminals “L1”, “M” and “2”.

FOR UNITS WITH ROTARY CONTROLS SYSTEM CONTROL SWITCH

(“WE” & “WY” Models) An eight position switch is used to regulate the operation of the fan motor, compressor and electric heater.

The unit can be operated in cooling or heating mode with

rotom naf eht dna no retaeh cirtcele ro rosserpmoc eht

operating on low, medium or high speed.

The fan motor can also be operated independently on medium speed. See switch section as indicated on decorative control panel, in Figure 7.

Figure 7: System Control Panel

NOTE:

Units will operate in constant fan in the cooling mode and auto fan in the heating mode.

ELECTRIC SHOCK HAZARD

WARNING

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

ELECTRONIC CONTROL

THERMOSTAT

(“WE” & “WY” Models) A cross ambient thermostat is used on all electric heat and

heat pump WallMaster models (see Figure 9).

Range from 60° F (±2° F) to 92° F (±2° F).

TEST:

Remove wires from thermostat and check continuity between terminal “2” (common) and “1” for heating. Also check that contacts in thermostat open after placing in either position. NOTE: Temperature must be within range listed to check thermostat.

Figure 9 : Thermostat

THERMOSTAT ADJUSTMENT

No attempt should be made to adjust thermostat. Due to the sensitivity of the internal mechanism and the sophisticated equipment required to check the calibration, it is suggested that the thermostat be replaced rather than calibrated.

FAN MOTOR - TEST

1. Determine that capacitor is serviceable.

2. Disconnect fan motor wires from fan speed switch or system switch.

3. Apply “live” test cord probes on black wire and common terminal of capacitor. Motor should run at high speed.

4. Apply “live” test cord probes on red wire and common terminal of capacitor. Motor should run at low speed.

5. Apply “live” test cord probes on each of the remaining wires from the speed switch or system switch to test

intermediate speeds. If the control is in the “MoneySaver” mode and the thermostat calls for cooling, the fan will start - then stop after approximately 2 minutes; then the fan and compressor will start together approximately 2 minutes later.

Fan Motor

FAN MOTOR

A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan. A self-resetting overload is located inside the motor to protect against high temperature and high amperage conditions. (See Figure 23)

ELECTRIC SHOCK HAZARD

WARNING

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

OPERATION

Heat Pump w/back up Electric Heat

If the indoor ambient air themister reads 55 degrees, turn off the compressor and turn on the electric heat and continue fan operation until temp setting is satised. Then revert to standard heat pump operation.

If the compressor is time delayed:

1. Turn on the electric heat until the compressor is not time delayed.

2. When the compressor’s 3 minute time delay is over, turn off the electric heat, wait 5 seconds, then turn on the compressor.

Defrost:

If the outdoor coil thermister reads 30 degrees for 2 minutes continuously, turn off the compressor and turn on the electric heat and continue fan operation.

If the outdoor coil thermister reaches 43 degrees and the compressor has waited the standard delay time of 180-240 seconds:

1. Turn off the backup electric heat

2. Wait 5 seconds

3. Turn on the compressor

4. Continue fan operation.

COMPONENTS TESTING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

WARNING

CAPACITORS

DEFROST THERMOSTAT

(“WY” Electromechanical Control Models Only)

This thermostat is a single pole - double throw with contacts between terminal “2” and “3” closing on temperature rise and contacts between terminals “2” and “1” closing on temperature fall. When the contacts between terminals “2” and “3” open, power to the compressor is interrupted. When contacts between terminals “2” and “1” make, power is suppled to the heater element.

This control is a dual purpose control that acts as an outdoor thermostat and defrost control.

When the sensing bulb, attached to the condenser coil, senses enough icing on the outdoor coil it will interrupt power to the compressor and supply power to the heating

Figure 10: Defrost Control

DEFROST BULB LOCATION

(All “WY” Electromechanical Control Models) The defrost control bulb must be mounted securely and in the correct location to operate properly (see Figure 11).

Figure 11: Defrost Bulb Location (All “WY” Models)

element until the coil temperature reaches above 43°. Then the heater will shut off and the unit will resume operating in the reverse cycle mode.

When the outdoor coil temperature drops below 20 degrees, the unit will operate in electric heat mode continuously until the outdoor coil temperature rises above 43°.

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before servicing. Discharge capacitor with a 20,000 Ohm 2 Watt resistor before handling.

Failure to do so may result in personal injury, or death.

Many motor capacitors are internally fused. Shorting the terminals will blow the fuse, ruining the capacitor. A 20,000 ohm 2 watt resistor can be used to discharge capacitors safely. Remove wires from capacitor and place resistor across terminals. When checking a dual capacitor with a capacitor analyzer or ohmmeter, both sides must be

tested.

Capacitor Check with Capacitor Analyzer

The capacitor analyzer will show whether the capacitor is “open” or “shorted.” It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power-factor percentage. The instrument will automatically discharge the capacitor when

the test switch is released.

Capacitor Connections

The starting winding of a motor can be damaged by a shorted and grounded running capacitor. This damage usually can be avoided by proper connection of the running capacitor terminals.

From the supply line on a typical 230 volt circuit, a 115 volt potential exists from the “R” terminal to ground through a

possible short in the capacitor. However, from the “S” or start terminal, a much higher potential, possibly as high as 400 volts, exists because of the counter EMF generated in the start winding. Therefore, the possibility of capacitor failure is much greater when the identied terminal is connected to the “S” or start terminal. The identied terminal should always be connected to the supply line, or “R” terminal, never to the “S” terminal.

When connected properly, a shorted or grounded running capacitor will result in a direct short to ground from the “R”

terminal and will blow the line fuse. The motor protector will protect the main winding from excessive temperature.

Dual Rated Run Capacitor Hook-up

Figure 12: Heating Element

HEATING ELEMENT

(“WE” &”WY” Electronic and Electromechanical Models)

All “WE” and “WY” models are equipped with a 3.3 KW heating element.

The heating element has two heater limit switches (bimetal thermostats) connected in series with it. The number 1 limit located near the bottom, will open the circuit when the temperature reaches 130°F +/-5°. The number 2 is a high limit switch near the top of the element. It is designed to open the circuit at 165°F +/-8°.

Should the fan motor fail or filter become clogged etc., the high limit switch will open and interrupt the power to the heater before reaching an unsafe temperature condition.

Test the heater element for continuity below 130°F. The element’s resistance value is 13.7 Ohms +/-5%.

Not actual element - for reference only

DRAIN PAN VALVE

During the cooling mode of operation, condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil. This assists in cooling the refrigerant plus evaporating the water.

During the heating mode of operation, it is necessary that water be removed to prevent it from freezing during cold outside temperatures. This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning.

To provide a means of draining this water, a bellows type drain valve is installed over a drain opening in the base pan. This valve is temperature sensitive and will open when the outside temperature reaches 40°F. The valve will close gradually as the temperature rises above 40°F to fully close at 60°F.

Drain Pan Valve

REFRIGERATION SYSTEM SEQUENCE OF OPERATION

A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be more difcult and time consuming, if not (in some cases) entirely impossible. The refrigeration system uses four basic principles (laws) in its operation they are as follows:

1. “Heat always ows from a warmer body to a cooler body.”

2. “Heat must be added to or removed from a substance before a change in state can occur”

3. “Flow is always from a higher pressure area to a lower pressure area.”

4. “The temperature at which a liquid or gas changes state

is dependent upon the pressure.”

The refrigeration cycle begins at the compressor. Starting the compressor creates a low pressure in the suction line which draws refrigerant gas (vapor) into the compressor. The compressor then “compresses” this refrigerant, raising its pressure and its (heat intensity) temperature.

The refrigerant leaves the compressor through the discharge Line as a hot High pressure gas (vapor). The refrigerant enters the condenser coil where it gives up some of its heat. The condenser fan moving air across the coil’s nned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufcient quantity of heat has been removed from the refrigerant gas (vapor), the refrigerant will “condense” (i.e. change to a liquid). Once the refrigerant has been condensed (changed) to a liquid it is cooled even further by the air that continues to ow across the condenser coil.

The WallMaster design determines at exactly what point (in the condenser) the change of state (i.e. gas to a liquid) takes place. In all cases, however, the refrigerant must be totally condensed (changed) to a Liquid before leaving the condenser coil.

The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid. It next will pass through the refrigerant drier (if so equipped). It is the function of the drier to trap any moisture present in the system, contaminants, and large particulate matter.

The liquid refrigerant next enters the metering device. The metering device is a capillary tube. The purpose of the metering device is to “meter” (i.e. control or measure) the quantity of refrigerant entering the evaporator coil.

In the case of the capillary tube this is accomplished (by design) through size (and length) of device, and the pressure difference present across the device.

Since the evaporator coil is under a lower pressure (due to the suction created by the compressor) than the liquid line, the liquid refrigerant leaves the metering device entering the evaporator coil. As it enters the evaporator coil, the larger area and lower pressure allows the refrigerant to expand and lower its temperature (heat intensity). This expansion is often referred to as “boiling”. Since the unit’s blower is moving indoor air across the nned surface of the evaporator coil, the expanding refrigerant absorbs some of that heat. This results in a lowering of the indoor air temperature, hence the “cooling” effect.

The expansion and absorbing of heat cause the liquid refrigerant to evaporate (i.e. change to a gas). Once the refrigerant has been evaporated (changed to a gas), it is heated even further by the air that continues to ow across the evaporator coil.

The particular system design determines at exactly what point (in the evaporator) the change of state (i.e. liquid to a gas) takes place. In all cases, however, the refrigerant must be totally evaporated (changed) to a gas before leaving the evaporator coil.

The low pressure (suction) created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor. The refrigerant then returns to the compressor, where the cycle is repeated.

Suction Line

Evaporator Coil

Metering Device

Refrigerant Strainer

Discharge Line

Condenser Coil

Compressor

Refrigerant Drier

Liquid Line

SEALED REFRIGERATION SYSTEM REPAIRS

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.

ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.

EQUIPMENT REQUIRED:

1. Voltmeter

2. Ammeter

3. Ohmmeter

9. High Pressure Gauge - (0 - 400 lbs.)

10. Low Pressure Gauge - (30 - 150 lbs.)

11. Vacuum Gauge - (0 - 1000 microns)

4. E.P.A. Approved Refrigerant Recovery System

5. Vacuum Pump (capable of 200 microns or less vacuum.)

6. Acetylene Welder

7. Electronic Halogen Leak Detector (G.E. Type H-6 or equivalent.)

8. Accurate refrigerant charge measuring device such as:

a. Balance Scales - 1/2 oz. accuracy

b. Charging Board - 1/2 oz. accuracy

WARNING

RISK OF ELECTRIC SHOCK

Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.

Failure to do so could result in electric shock, serious injury or death.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Refrigerant Charging

NOTE: Because The WallMaster System Is A Sealed System, Service Process Tubes Will Have To Be Installed. First Install A Line Tap And Remove Refrigerant From System. Make Necessary Sealed System Repairs And Vacuum System. Crimp Process Tube Line And Solder End Shut. Do Not Leave A Service Valve In The Sealed System.

EQUIPMENT MUST BE CAPABLE OF:

1. Recovery CFC’s as low as 5%.

2. Evacuation from both the high side and low side of the system simultaneously.

3. Introducing refrigerant charge into high side of the system.

4. Accurately weighing the refrigerant charge actually introduced into the system.

5. Facilities for owing nitrogen through refrigeration tubing during all brazing processes.

Proper refrigerant charge is essential to proper unit operation. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or efciency. Accordingly, the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged.

Too much refrigerant (overcharge) in the system is just as bad (if not worse) than not enough refrigerant (undercharge). They both can be the source of certain compressor failures if they remain uncorrected for any period of time. Quite often, other problems (such as low air ow across evaporator, etc.) are misdiagnosed as refrigerant charge problems. The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems.

An overcharged unit will at times return liquid refrigerant (slugging) back to the suction side of the compressor eventually causing a mechanical failure within the compressor. This mechanical failure can manifest itself as valve failure, bearing failure, and/or other mechanical failure. The specic type of failure will be inuenced by the amount of liquid being returned, and the length of time the slugging continues.

Not enough refrigerant (undercharge) on the other hand, will cause the temperature of the suction gas to increase to the point where it does not provide sufcient cooling for the compressor motor. When this occurs, the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector. Continued overheating of the motor windings and/or cycling of the overload will eventually lead to compressor motor or overload failure.

Method Of Charging / Repairs

The acceptable method for charging the WallMaster system is the Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate.

The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps:

1. Install a piercing valve to remove refrigerant from the sealedsystem. (Piercing valve must be removed from the system before recharging.)

2. Recover Refrigerant in accordance with EPA regulations.

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

3. Install a process tube to sealed system.

CAUTION

FREEZE HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with liquid refrigerant.

Failure to follow these procedures could result in minor to moderate injury.

4. Make necessary repairs to system.

5. Evacuate system to 300 microns or less.

6. Weigh in refrigerant with the property quantity of R-22 refrigerant.

7. Start unit, and verify performance.

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

8. Crimp the process tube and solder the end shut.

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Undercharged Refrigerant Systems

An undercharged system will result in poor performance (low pressures, etc.) in both the heating and cooling cycle.

Whenever you service a unit with an undercharge of refrigerant, always suspect a leak. The leak must be repaired before charging the unit.

To check for an undercharged system, turn the unit on, allow the compressor to run long enough to establish working pressures in the system (15 to 20 minutes).

During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator; an intermittent hissing and gurgling sound indicates a low refrigerant charge. Intermittent frosting and thawing of the evaporator is another indication of a low charge, however, frosting and thawing can also be caused by insufcient air over the evaporator.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

A check of the amperage drawn by the compressor motor should show a lower reading. (Check the Unit Specication.) After the unit has run 10 to 15 minutes, check the gauge pressures. Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures.

Checks for an undercharged system can be made at the compressor. If the compressor seems quieter than normal, it is an indication of a low refrigerant charge.

Overcharged Refrigerant Systems

Compressor amps will be near normal or higher. Noncondensables can also cause these symptoms. To conrm, remove some of the charge, if conditions improve, system may be overcharged. If conditions don’t improve, Noncondensables are indicated.

Whenever an overcharged system is indicated, always make sure that the problem is not caused by air ow problems. Improper air ow over the evaporator coil may indicate some of the same symptoms as an over charged system.

An overcharge can cause the compressor to fail, since it would be “slugged” with liquid refrigerant.

The charge for any system is critical. When the compressor is noisy, suspect an overcharge, when you are sure that the air quantity over the evaporator coil is correct. Icing

of the evaporator will not be encountered because the refrigerant will boil later if at all. Gauges connected to system will usually have higher head pressure (depending upon amount of over charge). Suction pressure should be slightly higher.

Restricted Refrigerant System

Troubleshooting a restricted refrigerant system can be difcult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions.

A partial restriction allows some of the refrigerant to circulate through the system.

With a complete restriction there is no circulation of refrigerant in the system.

Restricted refrigerant systems display the same symptoms as a “low-charge condition.”

When the unit is shut off, the gauges may equalize very slowly.

Gauges connected to a completely restricted system will run in a deep vacuum. When the unit is shut off, the gauges

will not equalize at all.

A quick check for either condition begins at the evaporator. With a partial restriction, there may be gurgling sounds

at the metering device entrance to the evaporator. The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device. Frost may continue on the suction line back to the compressor.

Often a partial restriction of any type can be found by feel, as there is a temperature difference from one side of the restriction to the other.

With a complete restriction, there will be no sound at the metering device entrance. An amperage check of the compressor with a partial restriction may show normal current when compared to the unit speci cation. With a complete restriction the current drawn may be considerably less than normal, as the compressor is running in a deep vacuum (no load.) Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there.

The following conditions are based primarily on a system in the cooling mode.

HERMETIC COMPONENTS CHECK

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

METERING DEVICE

Capillary Tube Systems

WARNING

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

All units are equipped with capillary tube metering devices.

Checking for restricted capillary tubes.

1. Connect pressure gauges to unit.

2. Start the unit in the cooling mode. If after a few minutes

of operation the pressures are normal, the check valve and the cooling capillary are not restricted.

CHECK VALVE

A unique two-way check valve is used on the reverse cycle heat pumps. It is pressure operated and used to direct the ow of refrigerant through a single lter drier and to the proper capillary tube during either the heating or cooling cycle.

One-way Check Valve (Heat Pump Models)

3. Switch the unit to the heating mode and observe the gauge readings after a few minutes running time. If the system pressure is lower than normal, the heating capillary is restricted.

4. If the operating pressures are lower than normal in both

the heating and cooling mode, the cooling capillary is restricted.

Failure of the slide in the check valve to seat properly in either mode of operation will cause ooding of the cooling coil. This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line.

COOLING MODE

In the cooling mode of operation, liquid refrigerant from condenser (liquid line) enters the cooling check valve forcing the heating check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator. (Note: liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode).

NOTE: The slide (check) inside the valve is made of teon. Should it become necessary to replace the check valve, place a wet cloth around the valve to prevent overheating during the brazing operation.

CHECK VALVE OPERATION

In the cooling mode of operation, high pressure liquid enters the check valve forcing the slide to close the opposite port (liquid line) to the indoor coil. Refer to refrigerant ow chart. This directs the refrigerant through the lter drier and cooling capillary tube to the indoor coil.

In the heating mode of operation, high pressure refrigerant enters the check valve from the opposite direction, closing the port (liquid line) to the outdoor coil. The ow path of the refrigerant is then through the lter drier and heating capillary to the outdoor coil.

HEATING MODE

In the heating mode of operation, liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils. (Note: liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode).

REVERSING VALVE DESCRIPTION/OPERATION

WARNING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

The Reversing Valve controls the direction of refrigerant ow to the indoor and outdoor coils. It consists of a pressure-operated, main valve and a pilot valve actuated by a solenoid plunger. The solenoid is energized during the heating cycle only. The reversing valves used in the RAC system is a 2-position, 4-way valve.

The single tube on one side of the main valve body is the high-pressure inlet to the valve from the compressor. The center tube on the opposite side is connected to the low pressure (suction) side of the system. The other two are connected to the indoor and outdoor coils. Small capillary tubes connect each end of the main valve cylinder to the

“A” and “B” ports of the pilot valve. A third capillary is a common return line from these ports to the suction tube on the main valve body. Four-way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve.

The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system. The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift.

NOTE: System operating pressures must be near normal before valve can shift.

TESTING THE COIL

WARNING

pressure to build in the system. Then switch the system from heating to cooling.

ELECTRIC SHOCK HAZARD

Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.

Failure to do so could result in electric shock, serious injury or death.

The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle.

1. Turn off high voltage electrical power to unit.

2. Unplug line voltage lead from reversing valve coil.

3. Check for electrical continuity through the coil. If you do not have continuity replace the coil.

4. Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug. There should be no continuity between either of the coil leads and ground; if there is, coil is grounded and must be replaced.

5. If coil tests okay, reconnect the electrical leads.

6. Make sure coil has been assembled correctly.

NOTE: Do not start unit with solenoid coil removed from valve, or do not remove coil after unit is in operation. This will cause the coil to burn out.

If the valve is stuck in the heating position, block the air ow through the indoor coil and allow discharge pressure to build in the system. Then switch the system from heating to cooling.

Should the valve fail to shift in either position after increasing the discharge pressure, replace the valve.

Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting.

If you determing this is the problem, replace the reversing

valve.

After all of the previous inspections and checks have been made and determined correct, then perform the “Touch Test” on the reversing valve.

CHECKING THE REVERSING VALVE

NOTE: You must have normal operating pressures before the reversing valve can shift.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Check the operation of the valve by starting the system and switching the operation from “Cooling” to “Heating” and then back to “Cooling”. Do not hammer on valve.

Occasionally, the reversing valve may stick in the heating or cooling position or in the mid-position.

When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure.

Should the valve fail to shift from coooling to heating, block the air ow through the outdoor coil and allow the discharge

Reversing Valve in Heating Mode

Touch Test in Heating/Cooling Cycle

WARNING

BURN HAZARD

Certain unit components operate at temperatures hot enough to cause burns.

Proper safety procedures must be followed, and proper protective clothing must be worn.

The only definite indications that the slide is in the midposition is if all three tubes on the suction side of the valve are hot after a few minutes of running time.

NOTE: A condition other than those illustrated above, and on Page 31, indicate that the reversing valve is not shifting properly. Both tubes shown as hot or cool must be the same corresponding temperature.

Failure to follow these procedures could result in minor to moderate injury.

Procedure For Changing Reversing Valve

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

6. Protect new valve body from heat while brazing with plastic heat sink (Thermo Trap) or wrap valve body with wet rag.

7. Fit all lines into new valve and braze lines into new

valve.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures could result in serious injury or death.

8. Pressurize sealed system with a combination of R-22 and nitrogen and check for leaks, using a suitable leak detector. Recover refrigerant per EPA guidelines.

9. Once the sealed system is leak free, install solenoid coil

on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate. Crimp the process tubes and solder the ends shut. Do not leave Schrader or piercing valves in the sealed system.

NOTE: When brazing a reversing valve into the system, it is of extreme importance that the temperature of the valve does not exceed 250

Wrap the reversing valve with a large rag saturated with water. “Re-wet” the rag and thoroughly cool the valve after each brazing operation of the four joints involved.

°F at any time.

NOTICE

FIRE HAZARD

The use of a torch requires extreme care and proper judgment. Follow all safety recommended precautions and protect surrounding areas with re proof materials. Have a re extinguisher readily available. Failure to follow this notice could result in moderate to serious property damage.

1. Install Process Tubes. Recover refrigerant from sealed system. PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED.

2. Remove solenoid coil from reversing valve. If coil is to be reused, protect from heat while changing valve.

3. Unbraze all lines from reversing valve.

4. Clean all excess braze from all tubing so that they will slip into ttings on new valve.

5. Remove solenoid coil from new valve.

The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection.

COMPRESSOR CHECKS

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Locked Rotor Voltage (L.R.V.) Test

Locked rotor voltage (L.R.V.) is the actual voltage available at the compressor under a stalled condition.

Single Phase Connections

Disconnect power from unit. Using a voltmeter, attach one lead of the meter to the run “R” terminal on the compressor and the other lead to the common “C” terminal of the compressor. Restore power to unit.

Determine L.R.V.

Start the compressor with the volt meter attached; then stop the unit. Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter. The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize. Voltage should be at or above minimum voltage of 197 VAC, as specied on the rating plate. If less than minimum, check for cause of inadequate power supply; i.e., incorrect wire size, loose electrical connections, etc.

Amperage (L.R.A.) Test

The running amperage of the compressor is the most important of these readings. A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically.

Single Phase Running and L.R.A. Test

NOTE: Consult the specication and performance section

for running amperage. The L.R.A. can also be found on the rating plate.

Select the proper amperage scale and clamp the meter probe around the wire to the “C” terminal of the compressor.

External Overload

The compressor is equipped with an external overload which senses both motor amperage and winding temperature. High motor temperature or amperage heats the overload causing it to open, breaking the common circuit within the compressor.

Heat generated within the compressor shell, usually due to recycling of the motor, is slow to dissipate. It may take anywhere from a few minutes to several hours for the

overload to reset.

Checking the External Overload

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

WARNING

BURN HAZARD

Certain unit components operate at temperatures hot enough to cause burns.

Proper safety procedures must be followed, and proper protective clothing must be worn.

Failure to follow this warning could result in moderate to serious injury.

With power off, remove the leads from compressor terminals. If the compressor is hot, allow the overload to cool before starting check. Using an ohmmeter, test continuity across the terminals of the external overload. If you do not have continuity; this indicates that the overload is open and must be replaced.

Turn on the unit and read the running amperage on the meter. If the compressor does not start, the reading will indicate the locked rotor amperage (L.R.A.).

Single Phase Resistance Test

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1).

Touch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter from terminals common to run (“C” to “R”).

Add values “C” to “S” and “C” to “R” together and check resistance from start to run terminals (“S” to “R”). Resistance “S” to “R” should equal the total of “C” to “S” and “C” to “R.”

In a single phase PSC compressor motor, the highest value will be from the start to the run connections (“S” to “R”). The next highest resistance is from the start to the common connections (“S” to “C”). The lowest resistance is from the run to common. (“C” to “R”) Before replacing a compressor, check to be sure it is defective.

GROUND TEST

Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (clean point of contact as a good connection is a must) and the other probe in turn to each compressor terminal. If a reading is obtained the compressor is grounded and must be replaced.

Check the complete electrical system to the compressor and compressor internal electrical system, check to be certain that compressor is not out on internal overload.

Complete evaluation of the system must be made whenever you suspect the compressor is defective. If the compressor has been operating for sometime, a careful examination must be made to determine why the compressor failed.

Many compressor failures are caused by the following conditions:

1. Improper air ow over the evaporator.

2. Overcharged refrigerant system causing liquid to be returned to the compressor.

3. Restricted refrigerant system.

4. Lack of lubrication.

5. Liquid refrigerant returning to compressor causing oil to be washed out of bearings.

6. Noncondensables such as air and moisture in

the system. Moisture is extremely destructive to a refrigerant system.

7. Capacitor test (see page 21).

CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefciency is normally due to broken or damaged suction and/or discharge valves, reducing the ability of the compressor to pump refrigerant gas.

This condition can be checked as follows:

1. Install a piercing valve on the suction and discharge or liquid process tube.

2. Attach gauges to the high and low sides of the system.

3. Start the system and run a “cooling or heating performance test.” If test shows:

A. Below normal high side pressure B. Above normal low side pressure C. Low temperature difference across coil

The compressor valves are faulty - replace the compressor.

COMPRESSOR REPLACEMENT

Recommended procedure for compressor replacement

WARNING

RISK OF ELECTRIC SHOCK

Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.

Failure to do so could result in electric shock, serious injury or death.

1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

2. Recover all refrigerant from the system though the process tubes. PROPER HANDLING OF

RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED. Do not use

gauge manifold for this purpose if there has been a burnout. You will contaminate your manifold and hoses. Use a Schrader valve adapter and copper tubing for burnout failures.

WARNING

HIGH TEMPERATURES

Extreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, handling or working around unit while in operation with high temperature components. Wear protective safety aids such as: gloves, clothing etc.

Failure to do so could result in serious burn injury.

3. After all refrigerant has been recovered, disconnect suction and discharge lines from the compressor and remove compressor. Be certain to have both suction and discharge process tubes open to atmosphere.

4. Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean

container.

5. Using an acid test kit (one shot or conventional kit), test the oil for acid content according to the instructions with the kit.

6. If any evidence of a burnout is found, no matter how slight, the system will need to be cleaned up following proper procedures.

7. Install the replacement compressor.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures result in serious injury or death.

8. Pressurize with a combination of R-22 and nitrogen

and leak test all connections with an electronic or Halide leak detector. Recover refrigerant and repair any leaks found.

Repeat Step 8 to insure no more leaks are present.

9. Evacuate the system with a good vacuum pump capable of a nal vacuum of 300 microns or less. The system should be evacuated through both liquid line and suction line gauge ports. While the unit is being evacuated, seal all openings on the defective compressor. Compressor manufacturers will void warranties on units received not properly sealed. Do not distort the manufacturers tube connections.

CAUTION

FREEZE HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with liquid refrigerant.

NOTICE

FIRE HAZARD

Failure to follow these procedures could result in minor to moderate injury.

10. Recharge the system with the correct amount of refrigerant. The proper refrigerant charge will be found on the unit rating plate. The use of an accurate

measuring device, such as a charging cylinder, electronic scales or similar device is necessary.

SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

Failure to do so may result in personal injury, or death.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures result in serious injury or death.

Recover all refrigerant and oil from the system.

Remove compressor, capillary tube and lter drier

from the system.

Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent. Use approved ushing agent to remove all contamination from system. Inspect suction and discharge line for carbon deposits. Remove and clean if necessary. Ensure all acid is neutralized.

Reassemble the system, including new drier strainer

and capillary tube.

Proceed with step 8-10 on previous page.

ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE

Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only one main exception:

NEVER, under any circumstances, charge a rotary compressor through the LOW side. Doing so would cause permanent damage to the new compressor.

ROUTINE MAINTENANCE

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before inspections, maintenances, or service.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

AIR FILTER

Clean the unit air intake lter at least every 300 to 350 hours of operation. Clean the lters with a mild detergent in warm water and allow to dry thoroughly before reinstalling.

COILS AND BASE PAN

Units are to be inspected and serviced by qualied service personnel only. Use proper protection on surrounding property. Failure to follow this notice could result in moderate or serious property damage.

WARNING

EXCESSIVE WEIGHT HAZARD

Use two people to lift or carry the unit, and wear proper protective clothing.

Failure to do so may result in personal injury.

Do not use a caustic coil cleaning agent on coils or base pan. Use a biodegradable cleaning agent and degreaser, to prevent damage to the coil and/or base pan.

NOTICE

WARNING

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

The indoor coil (evaporator coil), the outdoor coil (condenser coil) and base pan should be inspected periodically (yearly or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper, etc.). Clean the coils and base pan with a soft brush and compressed air or vacuum. If using a pressure washer, be careful not to bend the aluminium n pack. Use a sweeping up and down motion in the direction of the vertical aluminum n pack when pressure cleaning coils. Cover all electrical components to protect them from water or spray. Allow the unit to dry thoroughly before reinstalling it in the sleeve.

BLOWER WHEEL / HOUSING / CONDENSER FAN / SHROUD

Inspect the indoor blower housing, evaporator blade, condenser fan blade and condenser shroud periodically (yearly or bi-yearly) and clean of all debris (lint, dirt, mold, fungus, etc.). Clean the blower housing area and blower wheel with an antibacterial / antifungal cleaner. Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud. Use warm or cold water when rinsing these items. Allow all items to dry thoroughly before reinstalling them.

ELECTRONIC / ELECTRICAL / MECHANICAL

Periodically (at least yearly or bi-yearly): inspect all control components: electronic, electrical and mechanical, as well as the power supply. Use proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform electrical tests. Use an air conditioning or refrigeration thermometer to check room, outdoor and coil operating temperatures. Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors.

Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised or

altered.

Return Air Grille

Decorative Front

WSC

Sleeve

AB123456C3567

MODEL# WS07A10B

Airflow

Rotate

Discharge Grille

1" Diameter Plug

ROUTINE MAINTENANCE (Continued)

NOTICE

Do not drill holes in the bottom of the drain pan or the underside of the unit. Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property.

SLEEVE / DRAIN

Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and debris. Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as

needed.

FRONT COVER

Clean the front cover when needed. Use a mild detergent. Wash and rinse with warm water. Allow it to dry thoroughly before reinstalling it in the chassis.

1” Diameter Plug

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

noitcA esuaC elbissoP melborP

Compressor does not run

Low voltage

Check voltage at compressor. 115V & 230V units will operate at 10% voltage variance

T-stat not set cold enough or inoperative

Set t-stat to coldest position. Test t-stat & replace if inoperative

Compressor hums but cuts off on overload

Hard start compressor. Direct test compressor. If compressor starts, add starting components

Open or shorted compressor windings

Check for continuity & resistance

Open overload Test overload protector & replace if inoperative

Open capacitor Test capacitor & replace if inoperative

Inoperative system switch

Test for continuity in all positions. Replace if inoperative

Broken, loose or incorrect wiring

Refer to appropriate wiring diagrams to check wiring

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Fan motor

does not run

Inoperative system switch Test switch & replace if inoperative

Broken, loose or incorrect wiring Refer to applicable wiring diagram

Open capacitor Test capacitor & replace if inoperative

Fan speed switch open Test switch & replace if inoperative

Inoperative fan motor

Test fan motor & replace if inoperative (be sure internal overload has had time to reset)

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Does not cool or

only cools slightly

Undersized unit Refer to industry standard sizing chart

T-stat open or inoperative

Set to coldest position. Test t-stat & replace if necessary

Dirty ﬁ launaM s’renwO ni dednemmocer sa naelC retl

Dirty or restricted condenser or evaporator coil

Use pressure wash or biodegradable cleaning agent to clean

Poor air circulation Adjust discharge louvers. Use high fan speed

Fresh air or exhaust air door open on applicable models

Close doors. Instruct customer on use of this feature

Low capacity - undercharge Check for leak & make repair

Compressor not pumping properly

Check amperage draw against nameplate. If not conclusive, make pressure test

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Unit does not run

Fuse blown or circuit tripped

Replace fuse, reset breaker. If repeats, check fuse or breaker size. Check for shorts in unit wiring & components

Power cord not plugged in Plug it in

System switch in “OFF” position Set switch correctly

Inoperative system switch or open control board

Test for continuity

Loose or disconnected wiring at switch, control board or other com-

ponents

Check wiring & connections. Reconnect per wiring diagram

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Evaporator coil

freezes up

Dirty ﬁ launaM s’renwO ni dednemmocer sa naelC retl

Restricted airﬂ ow

Check for dirty or obstructed coil. Use pressure wash or biodegradable cleaning agent to clean

Inoperative t-stat or thermistors Test for continuity

Short of refrigerant De-ice coil & check for leak

Inoperative fan motor Test fan motor & replace if inoperative

Partially restricted capillary tube

De-ice coil. Check temp. differential (delta T) across coil. Touch test coil return bends for same temp. Test for low running current

noitcA esuaC elbissoP melborP

Compressor runs

continually & does

not cycle off

Excessive heat load

Unit undersized. Test cooling performance & replace with larger unit if needed

Restriction in line

Check for partially iced coil & check temperature split across coil

Refrigerant leak

Check for oil at silver soldered connections. Check for partially iced coil. Check split across coil. Check for low running amperage

T-stat contacts stuck

Check operation of t-stat. Replace if contacts remain closed.

T-stat incorrectly wired Refer to appropriate wiring diagram

Thermistor shorted Replace thermistor or electronic control board

noitcA esuaC elbissoP melborP

T-stat does not

turn unit off

T-stat contacts stuck

Disconnect power to unit. Remove cover of t-stat & check if contacts are stuck. If so, replace t-stat

T-stat set at coldest point

Turn to higher temp. setting to see if unit cycles off

Incorrect wiring Refer to appropriate wiring diagrams

Unit undersized for area to be cooled

Refer to industry standard sizing chart

Defective thermistor Replace thermistor or electronic control board

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Compressor runs

for short periods

only. Cycles on

overload

Overload inoperative. Opens too soon

Check operation of unit. Replace overload if system operation is satisfactory

Compressor restarted before system pressures equalized

Allow a minimum of 2 minutes to allow pressures to equalize before attempting to restart. Instruct customer of waiting period

Low or ﬂ uctuating voltage

Check voltage with unit operating. Check for other appliances on circuit. Air conditioner should be in separate circuit for proper voltage & fused separately

Incorrect wiring Refer to appropriate wiring diagram

Shorted or incorrect capacitor

Check by substituting a known good capacitor of correct rating

Restricted or low air ﬂ ow through condenser coil or evaporator coil

Check for proper fan speed or blocked coils

Compressor running abnormally hot

Check for kinked discharge line or restricted condenser. Check amperage

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T-stat does not

turn unit on

Loss of charge in t-stat bulb

Place jumper across t-stat terminals to check if unit operates. If unit operates, replace t-stat.

Loose or broken parts in t-stat Check as above

Incorrect wiring Refer to appropriate wiring diagram

Defective thermistor Replace thermistor or electronic control board

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Noisy operation

Poorly installed

Refer to Installation Manual for proper installation

Fan blade striking chassis Reposition - adjust motor mount

Compressor vibrating

Check that compressor grommets have not deteriorated. Check that compressor mounting parts are not missing

Improperly mounted or loose cabinet parts

Check assembly & parts for looseness, rubbing & rattling

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Water leaks into

the room

Evaporator drain pan overﬂ owing Clean obstructed drain trough

Condensation forming on base pan

Evaporator drain pan broken or cracked. Reseal or replace. No chassis gasket installed. Install chassis gasket

Poor installation resulting in rain entering the room

Check installation instructions. Reseal as required

Condensation on discharge grille louvers

Dirty evaporator coil. Use pressure wash or biodegradable cleaning agent to clean. Environmental phenomena: point supply louvers upward

Chassis gasket not installed Install gasket, per Installation manual

Downward slope of unit is too steep inward

Refer to installation manual for proper installation

Problem Possible Cause Action

Water “spitting”

into room

Sublimation: When unconditioned saturated, outside air mixes with conditioned air, condensation forms on the cooler surfaces

Ensure that foam gaskets are installed in between window panes & in between the unit & the sleeve. Also, ensure that fresh air/exhaust vents (on applicable models) are in the closed position & are in tact

Downward pitch of installation is too steep towards back of unit

Follow installation instructions to ensure that downward pitch of installed unit is no less than 1/4” & no more than 3/8”

Restricted coil or dirty  lter

Clean & advise customer of periodic cleaning & maintenance needs of entire unit

Problem Possible Cause Action

Excessive

moisture

Insuf cient air circulation thru area to be air conditioned

Adjust louvers for best possible air circulation

Oversized unit Operate in “MoneySaver” position

Inadequate vapor barrier in building structure, particularly  oors

Advise customer

Problem Possible Cause Action

T-stat or

thermistor

short cycles

Defective thermistor Replace thermistor or electronic control board

T-stat differential too narrow Replace t-stat

Plenum gasket not sealing, allowing discharge air to short cycle t-stat

Check gasket. Reposition or replace as

needed

Restricted coil or dirty  lter

Clean & advise customer of periodic cleaning & maintenance needs of entire unit

Problem Possible Cause Action

Prolonged off

cycles (automatic

operation)

Heat anticipator (resistor) wire disconnected at t-stat or system switch

Refer to appropriate wiring diagram

Heat anticipator (resistor) shorted or open

Disconnect plus from outlet. Remove resistor from bracket. Insert plug & depress “COOL” & “FAN AUTOMATIC” buttons. Place t-stat to warmest setting. Feel resistor for temperature. If no heat, replace resistor

Partial loss of charge in t-stat bulb causing a wide differential

Replace t-stat

Defective thermistor Replace thermistor or electronic control board

Problem Possible Cause Action

Outside water

leaks

Evaporator drain pan cracked or obstructed

Repair, clean or replace as required

Water in compressor area

Detach shroud from pan & coil. Clean & remove old sealer. Reseal, reinstall & check

Obstructed condenser coil

Use pressure wash or biodegradable cleaning agent to clean

Fan blade/slinger ring improperly positioned

Adjust fan blade to 1/2” of condenser coil  n pack

Problem Possible Cause Action

Room

temperature

uneven

(Heating cycle)

Heat anticipator (resistor) shorted (on applicable models)

Disconnect power to unit. Remove resistor from t-stat bulb block. Plus in unit & allow to operate. Feel resistor for heat. If not heat, replace resistor

Wide differential - partial loss of t-stat bulb charge

Replace t-stat & check

Incorrect wiring

Refer to appropriate wiring diagram. Resistor is energized during “ON” cycle of compressor

or fan.

Defective thermistor or control board Replace thermistor or electronic control board

Problem Possible Cause Action

Unit will not

defrost

Incorrect wiring Refer to appropriate wiring diagram

Defrost control out of calibration (applicable models)

If outside coil temperature is 25°F or below, & preselected time limit has elapsed, replace defrost control

Defrost control contacts stuck

If contacts remain closed between terminals “2” & “3” of the defrost control after preselected time interval has passed, replace control

Defrost control bulb removed from or not making good coil contact

Reinstall & be assured that good bulb to coil contact is made

Outdoor coil thermistor Replace thermistor or electronic control board

Problem Possible Cause Action

Does not heat

adequately

Dirty  lter Clean as recommended in Owner’s Manual

Unit undersized

Check heat rise across coil. If unit operates ef ciently, check if insulation can be added to attic or walls. If insulation is adequate, recommend additional unit or larger one

Outdoor t-stat open (applicable models)

T-stat should close at 38°F. Check continuity of control. If temperature is below 38°F,

replace control

Heater hi-limit control cycling on &

off

Check for adequate fan air across heater. Check control for open at 160°F & close at 150°F

Shorted supplementary heater Ohmmeter check, approx. 32-35 ohms

Incorrect wiring Check applicable wiring diagram

Defective thermistor or electronic control board

Replace thermistor or electronic control board

HEAT PUMP TROUBLESHOOTING

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Unit cools when

heat is called for

Incorrect wiring Refer to applicable wiring diagram

Defective solenoid coil Check for continuity of coil

Reversing valve fails to shift

Block condenser coil & switch unit to cooling. Allow pressure to build up in system, then

switch to heating. If valve fails to shift, replace valve.

Inoperative system switch or defrost thremostat or outdoor thermistor or electronic board

Check for continuity. Replace defective component.

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Heating

insufﬁ cient

Heating capillary tube partially restricted

Check for partially starved outer coil. Replace heating capillary tube

Check valve leaking internally

Switch unit several times from heating to cooling. Check temperature rise across coil. Refer to speciﬁ cation sheet for correct temperature rise

Reversing valve failing to shift completely; bypassing hot gas

Deenergize solenoid coil, raise head pressure, energize solenoid to break loose. If valve fails to make complete shift, replace valve.

HEAT PUMP TROUBLESHOOTING

DISCHARGE TUBE

SUCTION TUBE to

Tube to OUTSIDE

from Compressor

Tube to INSIDE

Capillary Tube

Compressor

RIGHT Pilot

LEFT Pilot

COIL

NORMAL FUNCTION OF VALVE

VALVE

OPERATING

DISCHARGE TUBE

from Compressor

SUCTION TUBE

to Compressor

Tube to INSIDE

COIL

Tube to OUTSIDE

COIL

LEFT Pilot

Capillary Tube

RIGHT Pilot

Capillary Tube

CONDITION

NOTES:

* TEMPERATURE OF VALVE BODY

** WARMER THAN VALVE BODY

1 2 3 4 5 6 POSSIBLE CAUSES CORRECTIONS

Normal Cooling

Hot Cool

Cool as (2)

Hot

as (1)

*TVB TVB

Normal Heating

Hot Cool

Hot

as (1)

Cool

as (2)

*TVB TVB

MALFUNCTION OF VALVE

Valve will not

shift from cool

to heat.

Check Electrical circuit and coil

.tiucric lacirtcele riapeR .lioc ot egatlov oN

.lioc ecalpeR .lioc evitcefeD

Check refrigeration charge

.metsys egrahcer ,kael riapeR .egrahc woL

Pressure differential too high. Recheck system.

Hot Cool

Cool, as (2)

Hot,

as (1)

*TVB Hot Pilot valve okay. Dirt in one bleeder hole.

Deenergize solenoid, raise head pressure, reenergize solenoid to break dirt loose. If unsuccessful, remove valve, wash out. Check on air before installing. If no movement, replace valve, add strainer to discharge tube, mount valve horizontally.

Piston cup leak

Stop unit. After pressures equalize, restart with solenoid energized. If valve shifts, reattempt with compressor running. If still no shift, replace valve.

Valve will not

shift from cool

to heat.

Hot Cool

Cool, as (2)

Hot,

as (1)

*TVB *TVB Clogged pilot tubes.

Raise head pressure, operate solenoid to free. If still no shift, replace valve.

Hot Cool

Cool, as (2)

Hot,

as (1)

Hot Hot

Both ports of pilot open. (Back seat port did not close).

Raise head pressure, operate solenoid to free partially clogged port. If still no shift, replace valve.

Warm Cool

Cool, as (2)

Hot,

as (1)

*TVB Warm Defective Compressor. Replace compressor

Starts to shift

but does not

complete

reversal.

Hot Warm Warm Hot *TVB Hot

Not enough pressure differential at start of stroke or not enough ﬂ ow to maintain pressure differential.

Check unit for correct operating pressures and charge. Raise head pressure. If no shift, use valve with smaller port.

evlav ecalpeR .egamad ydoB

Hot Warm Warm Hot Hot Hot Both ports of pilot open.

Raise head pressure, operate solenoid. If no shift, use valve with smaller ports.

evlav ecalpeR .egamad ydoB toH BVT* toH toH toH toH

Valve hung up at mid-stroke. Pumping volume of compressor not sufﬁ cient to maintain reversal.

Raise head pressure, operate solenoid. If no shift, use valve with smaller ports.

Hot Hot Hot Hot Hot Hot Both ports of pilot open.

Raise head pressure, operate solenoid. If no shift, replace valve.

Apparent leap in heating.

Hot Cool

Hot,

as (1)

Cool,

as (2)

*TVB *TVB Piston needle on end of slide leaking.

Operate valve several times, then recheck. If excessive leak, replace valve.

Hot Cool

Hot,

as (1)

Cool,

as (2)

**WVB **WVB Pilot needle and piston needle leaking.

Operate valve several times, then recheck. If excessive leak, replace valve.

Will not shift

from heat to

cool.

Hot Cool

Hot,

as (1)

Cool,

as (2)

*TVB *TVB Pressure differential too high.

Stop unit. Will reverse during equalization period. Recheck system

Clogged pilot tube.

Raise head pressure, operate solenoid to free dirt. If still no shift, replace valve.

Hot Cool

Hot,

as (1)

Cool,

as (2)

Hot *TVB Dirt in bleeder hole.

Raise head pressure, operate solenoid. Remove valve and wash out. Check on air before reinstalling, if no movement, replace valve. Add strainer to discharge tube. Mount valve horizontally.

Hot Cool

Hot,

as (1)

Cool,

as (2)

Hot *TVB Piston cup leak.

Stop unit. After pressures equalize, restart with solenoid deenergized. If valve shifts, reattempt with compressor running. If it still will not reverse while running, replace the valve.

Hot Cool

Hot,

as (1)

Cool,

as (2)

.evlav ecalpeR .tolip evitcefeD toH toH

Warm Cool

Warm,

as (1)

Cool,

as (2)

Warm *TVB Defective compressor. Replace compressor

TROUBLESHOOTING TOUCH TEST CHART: TO SERVICE REVERSING VALVES

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

COOL ONLY MODELS:

WS08B10A-D,A-F WS10BIOA-D WS14B10A-D

WS14B10A-E WS10B30A-D

WS13B30B-E,B-F WS16B30A-D,A-E

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

COOL WITH ELECTRIC HEAT MODELS:

WE10B33C-A WE13B33C-A WE16B33C-A

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

HEAT PUMP WITH ELECTRIC HEAT MODELS:

WY10B33C-A WY13B33C-A

WALLMASTER WIRING DIAGRAM

ELECTROMECHANICAL CONTROL

COOL WITH ELECTRIC HEAT MODELS:

WE10B33A-C WE13B33B-D,B-E WE16B33A-C,A-D

WALLMASTER WIRING DIAGRAM

ELECTROMECHANICAL CONTROL

HEAT PUMP WITH ELECTRIC HEAT MODELS:

WY10B33A-C,A-D WY13B33A-C,A-D

DK / Drain Kit

Installed at the back of the unit and allows for attachment to permanent condensate disposal system, if disposal is necessary or desired.

SB / Sub Base

Used as a base for the unit when it is desired to place the cord and receptacle within the installation, or simply as a base for the unit when mounted low in the wall.

Necessary when installing in a sleeve deeper than 16 3/4" deep, such as Fedders B sleeve (19 3/4" deep).

IDK / Internal Drain Kit

New construction applications where a condensate drain system has been built into the wall interior.

IMPORTANT:

Operating the air conditioner with incorrect

Adapter Kit (on 19 3/4” deep sleeve) will recirculate discharge air and cause compressor overload to trip.

CORRECT Vertical Louvers

INCORRECT Horizontal Louvers

WSC Sleeve Standard Grille

Exterior Grilles

WSC Sleeve Optional Architectural Grille- AG

Installation Accessories

FIGURE 1

MINIMUM OF 24” REQUIRED

FROM TOP OF UNIT TO CEILING.

INSIDE WALL

MINIMUM OF 1”

SPACING REQUIRED

ON ALL SIDES OF

LINTELS

WSC SLEEVE

DRAIN EXTENSION

THE UNIT.

7/8” MINIMUM

1” MINIMUM 3 1/2” FOR SUBBASE

9/16” MINIMUM

OUTSIDE WALL

INSTALLATION INSTRUCTIONS

FOR “WSC” SLEEVE

MOUNTING HARDWARE PROVIDED

WALL PREPARATION:

STEP 1 The wall opening required for a “WSC” SLEEVE is 17 1/4” high by 27 1/4” wide.

STEP 2 LINTELS must be used in opening of brick veneer and masonry walls to support the material above the “WSC”

SLEEVE. The following considerations should also be given:

A. Adjustable SUB-BASE SB–89 or other unit support must be provided for panel wall type construction

and for walls less than 8” thick.

B. A minimum distance of 1” must be allowed on all sides of the unit to adjacent wall and  oor. Where the sub–base is required, the minimum distance from the  oor to the sleeve must be 3 1/2”. To minimize chances of short cycling of the compressor, the minimum clearance between the ceiling and the top of the unit should be 24”. (See Figure 1).

ITEM

NO.

DESCRIPTION QTY.

1 SCREW, #12A X 2” 5

FIGURE 2

BACK UNIT REST

LEVEL

FRONT UNIT REST

RAISED LEDGE

INSTALLATION REQUIREMENTS:

STEP 1 The “WSC” SLEEVE should be positioned so that the DRAIN EXTENSION extends a minimum of 9/16” beyond the

OUTSIDE WALL (See Figure 1).

STEP 2 The “WSC” SLEEVE must extend a minimum of 7/8” beyond the INSIDE WALL.

STEP 3 The “WSC” SLEEVE must be installed level side to side.

STEP 4 The “WSC” SLEEVE must also be installed with a downward tilt toward the outside of the building. If a level is placed

so that it rests on the FRONT and BACK UNIT REST as shown in Figure 2, a properly installed unit provides a 1/2 bubble slope to the outside of the building.

CAUTION: SLEEVE projections and leveling precautions must be observed to prevent the entry of water into the room.

SLEEVE INSTALLATION:

STEP 1

After unpacking the “WSC” SLEEVE from the carton, remove the corrugated FRONT PANEL.

For immediate installation of sleeve and chassis (skip if installing chassis into sleeve at a later date):

Remove the rear WEATHER PANEL. Reverse grille and place lower edge into sleeve tab (Friedrich logo facing out). Align slots with screw holes. Secure grille with screws.

Place “WSC” SLEEVE in the wall opening following the instructions given in the INSTALLATION REQUIREMENTS section. Attach the SLEEVE to the INSIDE WALL by driving two #12A x 2” screws in each side of the SLEEVE (see Figure 1.). Shim at the top of the SLEEVE, midway between the sides. Drive one #12A x 2” screw in the top of the sleeve, close to the shim. Install screws from inside the SLEEVE. If the wall opening is not framed with wood, use expansion anchor bolts or molly (toggle) bolts (not provided).

MECHANICAL HAZARD

WARNING

Sharp edges and corners. Be careful with the sharp edges and corner. Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

STEP 2

STEP 3

STEP 4

Once the SLEEVE has been installed, check the LEVEL again to be sure the 1/2 bubble downward tilt is maintained. Apply shims, if required, to maintain the proper slope.

Caulk the perimeter of the entire opening on the inside and the outside between the SLEEVE and the WALL.

The corrugated front panel removed in Step 1 above must be remounted back in place if masonry work is to be done and/or if the “WSC” CHASSIS is to be installed at a later date.

CUT/SEVER HAZARD

MECHANICAL HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

WARNING

CUT/SEVER HAZARD

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

FIGURE A

AIR DISCHARGE PLENUM

FIGURE B

SIDE PROFILE

OF WALL SLEEVE

RAISED LEDGE

GASKET

FRONT UNIT REST

Remove the black rubber gasket from the air discharge plenum of the air conditioner (see ﬁ g. A). Look inside the wall sleeve and

check to see if a black rubber gasket is already in place along the bottom front (see ﬁ g. B). If one is not in place, thoroughly clean

the sleeve area between the front unit rests and the raised ledge (see ﬁ g. B). Once this area is clean and completely dry, peel the

orange backing from the gasket and apply it to the base of the sleeve (see ﬁ g. B). Once the gasket has been properly applied, the

sleeve is ready for the air conditioner to be installed per the installation instructons.

SEALING GASKET INSTALLATION INSTRUCTIONS

MECHANICAL HAZARD

WARNING

Sharp edges and corners. Be careful with the sharp edges and corner. Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

WARNING

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

MECHANICAL HAZARD

CUT/SEVER HAZARD

INSTALLATION INSTRUCTIONS

FOR INTERNAL DRAIN KIT

(IDK)

Apply Sealer to the bottom of the Drain Plate

Drill a .625”

diameter

hole here

Dimple

Wall Sleeve

Sleeve

Base

0.5” In

from edge

4.75” From back of basepan

Drill a .625”

diameter hole in the bottom of

the basepan

1. DRILL A .625” DIAMETER HOLE IN THE BOTTOM OF THE SLEEVE BASE TO THE DIMENSIONS SHOWN.

2. APPLY A SILICONE TYPE OF SEALER TO THE OUTSIDE BOTTOM EDGES OF THE DRAIN PLATE.

3. INSERT THE DRAIN TUBE INTO THE HOLE AND PRESS THE DRAIN PLATE DOWN TO FORM A WATERTIGHT SEAL AGAINST THE SLEEVE BASE.

4. DRILL A .625” DIAMETER HOLE IN THE BOTTOM OF THE BASE PAN AS SHOWN IN THE

ILLUSTRATION. THIS HOLE ALLOWS CONDENSATE TO ENTER THE WALL SLEEVE WHERE IT TRAVELS TO THE DRAIN KIT FOR DISPOSAL.

MECHANICAL HAZARD

WARNING

Sharp edges and corners. Be careful with the sharp edges and corner. Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

EXCESSIVE WEIGHT HAZARD

Use two people to lift or carry the unit, and wear proper protective clothing. Failure to do so may result in serious personal injury.

5151

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

5252

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

5353

WARNING

MECHANICAL HAZARD

CUT/SEVER HAZARD

Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.

5454

Friedrich Air Conditioning Company

P.O. Box 1540

San Antonio, TX 78295

210.357.4400

www.friedrich.com

WALLMASTER

THRU-THE-WALL AIR CONDITIONERS

LIMITED WARRANTY

FIRST YEAR

ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from

date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible for service. Any additional labor cost for removing inaccessible units and/or charges for mileage related to travel by a Service Agency that exceeds 25 miles one way will be the responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within twelve months from the date of the original purchase.

SECOND THROUGH FIFTH YEAR

SEALED REFRIGERANT SYSTEM: If the Sealed Refrigeration System (defined for this purpose as the compressor, condenser

coil, evaporator coil, reversing valve, check valve, capillary, filter drier, and all interconnecting tubing) supplied by FRIEDRICH in your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase, FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will not pay the cost of diagnosis of the problem, removal, freight charges, and transportation of the air conditioner to and from the Service Agency, and the reinstallation charges associated with repair of the Sealed Refrigeration System. All such cost will be the sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the original purchase.

APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District of Columbia, and Canada. This warranty is not applicable to:

1. Air filters or fuses.

2. Products on which the model and serial numbers have been removed.

3. Products which have defects or damage which results from improper installation, wiring, electrical current characteristics, or maintenance; or caused by accident, misuse or abuse, fire, flood, alterations and/or misapplication of the product and/or units installed in a corrosive atmosphere, default or delay in performance caused by war, government restrictions or restraints, strikes, material shortages beyond the control of FRIEDRICH, or acts of God.

OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service Organization in your area. They are listed in the Yellow Pages. If assistance is required in obtaining warranty performance, write

to: Room Air Conditioner Service Manager, Friedrich Air Conditioning Co., P.O. Box 1540, San Antonio, TX 78295-1540.

LIMITATIONS: THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty notwithstanding, ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY.

Performance of Friedrich’s Warranty obligation is limited to one of the following methods:

1. Repair of the unit

2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.

3. Providing a replacement unit of equal value

The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning.

NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of

consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you.

OTHER: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.

All service calls for explaining the operation of this product will be the sole responsibility of the consumer.

All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to repairs being made.

(10-08)

TECHNICAL SUPPORT

CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Ofce Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

FRIEDRICH AIR CONDITIONING CO.

Post Ofce Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

WM-ServMan (04-09)

Friedrich 2009, 2008 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual