Friedrich 2008 User Manual

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Service Manual

72

 

Temperature

 

 

Cooler

 

Cool

 

Fan

Fan

Only

Speed

Timer

Operation

On/Off

Start

Stop

 

Power

Money

Saver ®

Set Hr.

 

 

Models

WallMaster® Thru-the-Wall

 

2009

 

 

2008

WM-ServMan(04-09)

TECHNICAL SUPPORT CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Office 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 Identification ............................................................

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 Baffle 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

1

IMPORTANT SAFETY INFORMATION

The information contained in this manual is intended for use by a qualified 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 unqualified persons can result in subjecting the unqualified 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.

Your safety and the safety of others are very important.

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

This is 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:

WARNING

CAUTION

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.

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.

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

2

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 specified 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-acetylenetorch. Direct contact with the torch’s flame or hot surfaces can cause serious burns.

Make sure to protect personal and surrounding property with fire proof materials.

Have a fire extinguisher at hand while using a torch.

Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever possible.

Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks, flushing 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 fins 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.

3

1"1”DiameterPlug

PROPERTY DAMAGE HAZARDS

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 specified 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 fire 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 sufficient 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 Identification.)

WSC

Sleeve

Rotate

Airflow

Decorative

Front

MODEL#WS07A10BAB123456C3567

Discharge

Grille

Return

Air Grille

4

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 Specifications/Performance Data Section

5th DIGIT - ALPHABETICAL MODIFIER

6th DIGIT - VOLTAGE

1 = 115 Volts

3 = 230-208Volts

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

 

L

C

J

R

00001

Decade Manufactured

 

 

 

 

 

L=0

C=3

F=6

J=9

 

 

 

Production Run Number

A=1

D=4

G=7

 

 

 

 

 

B=2

E=5

H=8

 

 

 

 

 

 

 

 

 

 

 

Year Manufactured

 

 

 

 

Product Line

A=1

D=4

G=7

K=0

 

 

 

X = WallMaster

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

 

 

 

 

 

 

 

 

 

 

 

 

5

2008 / 2009 PERFORMANCE DATA

 

EVAPORATOR AIR

EVAPORATOR TEMP.

 

 

 

 

 

 

OPERATING

ELECTRICAL RATINGS

R-22REF.

 

 

BREAKER

COOLING

TEMP. DEG. F

 

DEG. F

CONDENSER

Discharge

Suction

Liquid

 

Sub-

PRESSURES

Evap

Motor

FUSE

 

 

 

 

 

 

PERFORMANCE

 

 

 

 

 

TEMPERATURE

Super Heat

 

 

 

 

 

 

 

DATA*

Discharge

Temp.

T(in)

 

T(out)

DEG. F

Temp

Temp

Temp

 

Cooling

Suction

Discharge

Amps Cool

Amps Heat

Locked Rotor

Charge in

CFM

RPM

60 Hertz

 

Air

Drop F.

 

 

 

 

 

 

 

 

 

 

 

 

 

Amps

OZ.

 

 

Amps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

126

180

66

99

16

31

82

225

4.6

4 / 15.2

26.0

38.0

225

1074

20

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

 

 

 

Specifications

 

ENERGYSTAR® models

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Energy

 

 

 

 

 

 

 

Cooling

 

Heating

 

 

 

 

 

 

 

E ciency

Moisture

Room

 

Weight

 

 

 

Capacity

 

Capacity

Volts

Cooling

Cooling

 

Heating

Heating

Ratio

Removal

Side Air

 

Lbs.

Model

 

 

BTU/h

 

 

BTU/h

Rated

Amps

Watts

 

Amps

Watts

EER

Pints/Hr. Circulation Sleeve

Ship/Ne

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

WE13B33C

 

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

Sleeve / Chassis Dimensions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Depth

Minimum

Minimum

Thru-the-wall

 

 

 

 

 

 

 

 

 

 

 

 

 

Finished Hole

 

 

 

 

 

 

 

 

 

 

 

 

 

with

Extension

Extension

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

Height

Width

Depth

 

Front

Into Room

Outside

Height

 

Width

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WSC Sleeve

16 3/4"

27"

16 3/4"

23"

7 1/2"

9/16"

17 1/4"

27 1/4"

 

 

 

 

 

 

 

Chassis

15 3/4"

26 1/2"

21"

 

 

 

 

 

 

 

 

 

6

electrical DATA

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

All electrical connections and wiring MUST be installedbyaqualifiedelectricianandconformto 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 fire 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 field 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

 

Circuit Rating

Plug Face

Wall Outlet

Model Numbers

Breaker or T-DFuse

(NEMA#)

Appearance

 

 

 

 

 

 

 

 

 

 

WS08B10A, WS10B10A,

125V - 15A

5 - 15P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WS14B10A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WS10B30A, WS13B30A,

250V - 15A

6 - 15P

 

 

 

 

 

 

 

WS16B30A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WE10, WE13, WE16

250V - 20A

6 - 20P

 

 

 

 

 

 

 

WY10, WY13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Theconsumer-throughtheAHAMRoomAirConditionerCertificationProgram-canbe certain that the AHAM Certification Seal accurately states the unit’s cooling and heating capacity rating, the amperes and the energy efficiency ratio.

*HACR: Heating Air Conditioning and Refrigeration

7

FUNCTIONAL COMPONENTS

A. Mechanical components

Drain pan valve

Temperature-sensitivevalve 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

Plenum assembly

Diffuser with directional louvers used to direct the conditioned airflow

Blower whee

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

Slinger fan blade

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 the coil

B. Electrical components

Thermostat

Used to maintain the specified room side comfort leve

System switch

Used 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

Capacitor

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

MoneySaver® switch

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

Fan Motor

Dual-shaftedfan motor operates the indoor blower wheel and the condenser fan blade simultaneously.

Solenoid

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

Heating element

Electric resistance heater

Heat anticipator

Used to provide better thermostat and room air temperature control.

C. Hermetic components

Compressor

Motorized device used to compress refrigerant through the sealed system.

Reversing valve

A four-wayswitching device used on all heat pump models to change the flow of refrigerant to permit heating or cooling.

Check valve

A pressure-operateddevice used to direct the flow of refrigerant to the proper capillary tube, during either the heating or cooling cycle

Capillary tube

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

8

How to operate the Friedrich WallMaster

Figure 1: WS Model cool-onlycontrol panel

To start unit

If your air conditioner is installed and plugged into a proper receptacle, 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.

1Touch the Power button once. The unit will automatically be inCool 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 theCool mode with constant fan.

2On WS cool-onlymodels, touch theMode buton once to activate theMoneySaver® (WS models only. See item 14 for Money Saver instructions on WY/WE models).

MoneySaver® is a feature that cycles the fan with the compressor so that the fan does not run all the time. This saves energy

and improves dehumidcation. MoneySaver® will also run to test the temperature if the off cycle is too long. Or you may prefer constant fan for more air movement. (To return to constant fan, touch theMode button two more times).

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

On WY/WS heat-coolmodels, touch theMode button once to activate theFan Only feature. TheFan Only setting will circulate air in the room without the compressor coming on.

3Continuing from MoneySaver® mode, touch theMode button once to activate theFan Only feature (WScool-onlymodels).

To adjust temperature

4Use the Mode button to select either theCool orMoneySaver® function (or Heat for WY/WEheat-coolmodels)

5COOLER – Touch thebutton to lower the room air temperature.

 

 

 

 

 

 

Power

1

2

3

4

 

 

 

 

 

8

 

Smart

Fan

 

Cool

 

 

9

 

Mode

Fan Only

 

6

 

 

Fan

Speed

 

 

 

 

 

 

Heat

 

7

 

 

 

 

 

Clock

 

 

 

Money

Timer

 

 

5

14

 

Set

Start Time

 

 

Saver

On/Off

Stop Time

 

 

13

 

 

 

 

Temp/Hour

 

 

 

 

 

 

 

10

11

12

 

 

 

 

 

Figure 2: WY/WE Model heat-coolcontrol panel

6WARMER – Touch thebutton to raise the room air temperature.

7Press both the andbuttons 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

8Touch the Fan Speed button to see the current setting. Touch 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-onlymodels)

9There is a fourth option, SF, when selecting the fan speed. This is the SMART FAN function. SMART FAN DOES NOT OPERATE IN CONJUNCTION WITH THE FAN ONLY MODE.

To activate Smart Fan(WY/WE heat-coolmodels)

9Press 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

10Touch t he Set Hour button to see t he c urrent setting. T he number that is displayed is the approximate time (hour only).

Use theandbuttons to change the settings. BE SURE TO SET A.M. AND P.M. ACCORDINGLY. (P.M. is indicated by a red light in the upper left corner of the display).

9

To set the timer

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

You can set the Start Time andStop Time a minimum of one hour apart, and a maximum of 23 hours apart.

11After setting the time, press the Set Hour button once (Start

light on). Use theandbuttons to select the time that the unit willSTART.

12After selecting the Start Time, press theSet Hour button once.

(Stop Light on). Use the andbuttons to select the time that the unit willSTOP. After selecting the stopping time, press theSet Hour button once.

13Press the Timer On/Off button (light turns on) to activate the timer function. To deactivate this function, press theTimer 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.

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

To Activate Money Saver (WY/WE models)

14Press the Money Saver button to activate the Money Saver feature. The light will indicate the Money Saver is in use.

MoneySaver® is a feature that cycles the fan with the compres sor so that the fan does not run all the time. This saves energy and improves dehumidification. MoneySaver® will also run to test the temperature if the off cycle is too long. Or you may prefer constant fan for more air movement. (To return to constant fan, touch theMode button two more times).

Automatic component protection

Your unit is equipped with Automatic Component Protection.

To protect the compressor 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 toFan Only mode, and switch back toCool mode, there is athree-minutedelay before the compressor comes back on.

10

Figure 3: WY/WE heat-coolmodel remote control

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

Figure 4: WS Models Only

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

Using the remote control

To start unit

1POWER - Press thePower button once. The unit will automatically start in the mode and fan speed it was last left on.

To set mode of operation

2COOL - Press theCool button to automatically switch the operating mode to COOL.

3FAN ONLY - Press theFan Only button if you want to run the fan only.

4 HEAT (WY/WE m odels only) -P ress t he Heat b utton to automatically switch the operating mode to HEAT.

5MoneySaver® - Press theMoney Saver® button to activate the MoneySaver® feature. This feature cycles the fan with the compressor so that the fan does not run all the time.

To adjust temperature

6WARMER -Pressthe Warmer button to raise the temperature setting.

7COOLER - Press theCooler button to lower the temperature setting.

To adjust fan speed

8FAN SPEED - Press theFan 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

9SET HOUR CLOCK - Press theSet Hr. button once to see the current clock setting. Continue pressing the button until you 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.

10TIMER START - PressStart to view the current start time for cooling. Continue pressing the START button until you arrive at the start time you desire. The start time for cooling will then be set.

11TIMER STOP - Press theStop button. Continue pressing the STOP button until you arrive at the stop time you desire. The stop time for cooling will then be set.

12TIMER ON / O FF - P ress t heO n/Off b utton (underTimer Operation) to activate (light on) or deactivate (light off) the timer. 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, theSet Hr. function must be reset or theTimer On/Off function will not work.

11

ELECTRONIC CONTROL PANEL

Figure 5: “WS” Cooling only models

Electronic Control Panel

72

 

 

 

 

Cool

 

Fan

Mode

Money Saver®

 

Speed

 

 

 

 

Fan Only

 

 

 

Clock

 

Timer

Set

Start Time

 

On/Off

Hour

Stop Time

 

 

 

Temp/Hour

Figure 6: “WE”/”WY” heat/cool 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 onthe WS/WE/ WY models (see figures 5 and 6).

2.The indoor temperature will display for 10 seconds. Indoortemperaturecanbeviewedinallmodes,including the Test Mode. The display can be changed back to theSET temperature by pressing any key (except thePower (on/off button) or it can do so automatically after 10 seconds have elapsed.

ACTIVATING TEST MODE

ActivateTest Mode bypressingatthesametime,theMode button and theTemp/Hour button on on theWS/WE/ WY models (see figures 5 and 6).

TheLEDsforSet/Hour: “Start Time”and “Stop Time”will blink 1 bps while Test Modeis active.

Test Mode has a duration of 90 minutes.Test Mode can be activated under any function, includingOff.

Test Mode is cancelled by pressing thePower (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.

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

ERROR CODE MODE

Error Code Mode is used to display all error codes stored since reset. It is asub-modeofTest Mode. Unit must be inTest Mode to enter theError Code function.

Activating Error Code Mode: Press the TIMER On/ Off”button on the WS/WE/WYmodels (see figures 5 and 6). The LEDfor the TIMER On/Offwill flash 1 bps (beats per second) while Error Code Modeis 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 Pointwill appear. (Each error code is listed once)

Exiting Error Code Mode: press the Timer On/Offbutton.

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

12

ERROR CODES LISTING FOR “WS” MODELS

E1 SHORT CYCLE SITUATION: Defined as a compressorthatstartsandstopsmorefrequently than it should.

E2 KEYBOARD STUCK ERROR: Ifanykeybutton is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignoreduntilreleased.Ifthe“Mode” keyisstuck, 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: Defined as a compressorthatstartsandstopsmorefrequently than it should.

E2 KEYBOARD STUCK ERROR: Ifanykeybutton is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignoreduntilreleased.Ifthe“Mode” keyisstuck, the unit’s function will default to Cool mode.

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 SHORT: Normaloperationisallowed. Replace probe (see note below).

E5 CONDENSER TEMPERATURE PROBE OPEN OR SHORT: Normaloperationisallowed. Replace probe.

E7 MOTOR OPERATION

E9 HEAT PUMP FAILURE

NOTE: Allerrorcodesdisplayforprobesopenorshortedwill 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 theTemperature 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 finish the reboot cycle. If the panel does not reboot, you will most likely need to have the panel replaced.

13

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 the compressor or electric heater on and the fan motor 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

Fan

Off

Only

Low

Low

Heat

Cool

Med

Med

Heat

Cool

High

High

 

 

Heat

Cool

MAX

MAX

! Allow 3 min. between restarts

HEAT

COOL

 

 

WARNING

ELECTRIC SHOCK HAZARD

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

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-nocontinuity between terminals.

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

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

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

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

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

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

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

Figure 8: System Control Switch

(Heat Pump & Electric Heat Models)

NOTE:

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

14

ELECTRONIC CONTROL 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 satisfied. 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 180-240seconds:

1.Turn off the backup electric heat

2.Wait 5 seconds

3.Turn on the compressor

4.Continue fan operation.

COMPONENTS TESTING

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:

WARNING

ELECTRIC SHOCK HAZARD

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

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

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

WARNING

ELECTRIC SHOCK HAZARD

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

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

15

CAPACITORS

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-factorpercentage. 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 identified terminal is connected to the “S” or start terminal. The identified 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

F C H

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 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°.

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)

16

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%.

Figure 12: Heating Element

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

17

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 difficult 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 flows 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 finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufficient 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 flow 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 driertotrapanymoisturepresentinthesystem,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 finned 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 flow 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

Discharge

Line

Line

Condenser

Evaporator Coil

Coil

Compressor

Metering

Device

Refrigerant Drier Liquid

Refrigerant Line

Strainer

18

SEALED REFRIGERATION SYSTEM REPAIRS

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO COOL-ONLYMODELS 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

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-6or equivalent.)

8.Accurate refrigerant charge measuring device such as:

a.Balance Scales - 1/2 oz. accuracy

b.Charging Board - 1/2 oz. accuracy

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

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

11.Vacuum Gauge - (0 - 1000 microns)

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 flowing nitrogen through refrigeration tubing during all brazing processes.

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

SealedRefrigerationSystemcontainsrefrigerant 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 VacuumSystem. CrimpProcessTubeLineAndSolderEnd Shut. Do Not Leave A Service Valve In The Sealed System.

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 efficiency. 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 flow 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 specific type of failure will be influenced by the amount of liquid being returned, and the length of time the slugging continues.

Not enough refrigerant (undercharge) on the other hand, will causethetemperatureofthesuctiongastoincrease tothepoint where it does not provide sufficient 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.

19

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-22refrigerant.

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.

20

 

WARNING

 

 

WARNING

 

 

ELECTRIC SHOCK HAZARD

 

 

HIGH PRESSURE HAZARD

 

 

Turn off electric power before service or

 

 

SealedRefrigerationSystemcontainsrefrigerant

 

 

installation.

 

 

and oil under high pressure.

 

 

Extreme care must be used, if it becomes

 

 

Proper safety procedures must be followed,

 

 

necessary to work on equipment with power

 

 

and proper protective clothing must be worn

 

 

applied.

 

 

when working with refrigerants.

 

 

Failure to do so could result in serious injury or

 

 

Failure to follow these procedures could

 

 

death.

 

 

result in serious injury or death.

 

 

 

 

 

 

 

Undercharged Refrigerant Systems

 

A check of the amperage drawn by the compressor

An undercharged system will result in poor performance

 

motor should show a lower reading. (Check the Unit

(low pressures, etc.) in both the heating and cooling

 

Specification.) After the unit has run 10 to 15 minutes,

cycle.

 

check the gauge pressures. Gauges connected to system

 

 

 

with an undercharge will have low head pressures and

Whenever you service a unit with an undercharge of

substantially low suction pressures.

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 insufficient air over the evaporator.

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

of the evaporator will not be encountered because the

Compressor amps will be near normal or higher.

refrigerant will boil later if at all. Gauges connected to

system will usually have higher head pressure (depending

Noncondensables can also cause these symptoms. To

upon amount of over charge). Suction pressure should be

confirm, remove some of the charge, if conditions improve,

slightly higher.

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 flow

 

 

 

problems. Improper air flow 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.

 

 

 

Thechargeforanysystemiscritical.Whenthecompressor

 

 

 

is noisy, suspect an overcharge, when you are sure that

 

 

 

the air quantity over the evaporator coil is correct. Icing

 

 

 

 

 

 

 

21

Restricted Refrigerant System

Troubleshooting a restricted refrigerant system can be difficult. 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-chargecondition.”

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 specifi 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.

22

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.

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.

METERING DEVICE

Capillary Tube Systems

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.

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.

CHECK VALVE

A unique two-waycheck valve is used on the reverse cycle heat pumps. It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle.

One-wayCheck Valve

(Heat Pump Models)

NOTE: The slide (check) inside the valve is made of teflon. 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 flow chart. This directs the refrigerant through the filter 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 flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil.

Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding 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).

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).

23

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 flow 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 a2-position,4-wayvalve.

The single tube on one side of the main valve body is the high-pressureinlet 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”portsofthepilotvalve.Athirdcapillaryisacommon return line from these ports to the suction tube on the main valve body. Four-wayreversing 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.

24

TESTING THE COIL

WARNING

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.

CHECKING THE REVERSING VALVE

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

WARNING

HIGH PRESSURE HAZARD

SealedRefrigerationSystemcontainsrefrigerant 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 flow through the outdoor coil and allow the discharge

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

If the valve is stuck in the heating position, block the air flow 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.

Reversing Valve in Heating Mode

25

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.

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

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.

Procedure For Changing Reversing Valve

WARNING

HIGH PRESSURE HAZARD

SealedRefrigerationSystemcontainsrefrigerant 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.

NOTICE

FIRE HAZARD

The use of a torch requires extreme care and proper judgment. Follow all safety recommended precautions and protect surrounding areas with fire proof materials. Have a fire 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 fittings on new valve.

5.Remove solenoid coil from new valve.

6.Protectnewvalvebodyfromheatwhilebrazingwith 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-22and 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°F at any time.

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.

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

26

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 specified 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 specification 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.

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.).

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.

27

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 flow 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 inefficiency 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.

28

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

SealedRefrigerationSystemcontainsrefrigerant 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.

NOTICE

FIRE HAZARD

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

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-22and 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 final 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.

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.

29

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

SealedRefrigerationSystemcontainsrefrigerant 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.

1.Recover all refrigerant and oil from the system.

2.Remove compressor, capillary tube and filter drier from the system.

3.Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent. Use approved flushing 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.

4.Reassemble the system, including new drier strainer and capillary tube.

5.Proceed with step 8-10on 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 theLOW side. Doing so would cause permanent damage to the new compressor.

30

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.

NOTICE

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

AIR FILTER

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

COILS AND BASE PAN

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.

NOTICE

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.

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 fin pack. Use a sweeping up and down motion in the direction of the vertical aluminum fin 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.

31

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"1”DiameterPlug

WSC

Sleeve

Rotate

Airflow

Decorative

Front

MODEL#WS07A10BAB123456C3567

Discharge

Grille

Return

Air Grille

32

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem

Possible Cause

Action

 

Low voltage

Check voltage at compressor. 115V & 230V

 

units will operate at 10% voltage variance

 

 

 

T-statnot set cold enough or

Set t-statto coldest position. Testt-stat& re-

 

inoperative

place if inoperative

 

Compressor hums but cuts off on

Hard start compressor. Direct test compressor.

 

overload

If compressor starts, add starting components

Compressor

Open or shorted compressor

Check for continuity & resistance

does not run

windings

 

 

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

 

 

Problem

Possible Cause

Action

 

Inoperative system switch

Test switch & replace if inoperative

 

Broken, loose or incorrect wiring

Refer to applicable wiring diagram

Fan motor

Open capacitor

Test capacitor & replace if inoperative

does not run

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)

 

 

Problem

Possible Cause

Action

 

Undersized unit

Refer to industry standard sizing chart

 

T-statopen or inoperative

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

 

necessary

 

 

 

Dirty filter

Clean as recommended in Owner’s Manual

 

Dirty or restricted condenser or

Use pressure wash or biodegradable cleaning

Does not cool or

evaporator coil

agent to clean

only cools slightly

Poor air circulation

Adjust discharge louvers. Use high fan speed

 

Fresh air or exhaust air door open

Close doors. Instruct customer on use of this

 

on applicable models

feature

 

Low capacity - undercharge

Check for leak & make repair

 

Compressor not pumping properly

Check amperage draw against nameplate. If

 

not conclusive, make pressure test

 

 

33

Problem

Possible Cause

Action

 

 

Replace fuse, reset breaker. If repeats, check

 

Fuse blown or circuit tripped

fuse or breaker size. Check for shorts in unit

 

 

wiring & components

 

Power cord not plugged in

Plug it in

Unit does not run

System switch in “OFF” position

Set switch correctly

Inoperative system switch or open

Test for continuity

 

 

control board

 

 

 

Loose or disconnected wiring at

Check wiring & connections. Reconnect per

 

switch, control board or other com-

 

wiring diagram

 

ponents

 

 

Problem

Possible Cause

Action

 

Dirty filter

Clean as recommended in Owner’s Manual

 

 

Check for dirty or obstructed coil. Use

 

Restricted airflow

pressure wash or biodegradable cleaning

 

 

agent to clean

Evaporator coil

Inoperative t-stator thermistors

Test for continuity

freezes up

Short of refrigerant

De-icecoil & check for leak

 

Inoperative fan motor

Test fan motor & replace if inoperative

 

 

De-icecoil. Check temp. differential (delta T)

 

Partially restricted capillary tube

across coil. Touch test coil return bends for

 

 

same temp. Test for low running current

Problem

Possible Cause

Action

 

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

 

 

Compressor runs

 

Check for oil at silver soldered connections.

Refrigerant leak

Check for partially iced coil. Check split across

continually & does

not cycle off

 

coil. Check for low running amperage

 

T-statcontacts stuck

Check operation of t-stat.Replace if contacts

 

remain closed.

 

 

 

T-statincorrectly wired

Refer to appropriate wiring diagram

 

 

 

 

Thermistor shorted

Replace thermistor or electronic control board

 

 

 

Problem

Possible Cause

Action

 

 

Disconnect power to unit. Remove cover

 

T-statcontacts stuck

of t-stat& check if contacts are stuck. If so,

 

 

replace t-stat

T-statdoes not

T-statset at coldest point

Turn to higher temp. setting to see if unit

cycles off

 

turn unit off

 

 

Incorrect wiring

Refer to appropriate wiring diagrams

 

 

 

 

 

Unit undersized for area to be

Refer to industry standard sizing chart

 

cooled

 

 

 

Defective thermistor

Replace thermistor or electronic control board

 

 

 

34

Problem

Possible Cause

Action

 

Overload inoperative. Opens too

Check operation of unit. Replace overload if

 

soon

system operation is satisfactory

 

Compressor restarted before

Allow a minimum of 2 minutes to allow

 

pressures to equalize before attempting to

 

system pressures equalized

 

restart. Instruct customer of waiting period

 

 

 

 

Check voltage with unit operating. Check for

Compressor runs

Low or fluctuating voltage

other appliances on circuit. Air conditioner

should be in separate circuit for proper voltage

for short periods

 

only. Cycles on

 

& fused separately

overload

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 flow through

Check for proper fan speed or blocked

 

condenser coil or evaporator coil

coils

 

Compressor running abnormally

Check for kinked discharge line or restricted

 

hot

condenser. Check amperage

Problem

Possible Cause

Action

 

Loss of charge in t-statbulb

Place jumper across t-statterminals to check if

 

unit operates. If unit operates, replace t-stat.

T-statdoes not

 

Loose or broken parts in t-stat

Check as above

turn unit on

Incorrect wiring

Refer to appropriate wiring diagram

 

 

Defective thermistor

Replace thermistor or electronic control board

Problem

Possible Cause

Action

 

Poorly installed

Refer to Installation Manual for proper

 

installation

 

 

 

Fan blade striking chassis

Reposition - adjust motor mount

Noisy operation

 

Check that compressor grommets have not

Compressor vibrating

deteriorated. Check that compressor mounting

 

 

 

parts are not missing

 

Improperly mounted or loose

Check assembly & parts for looseness,

 

cabinet parts

rubbing & rattling

Problem

Possible Cause

Action

 

Evaporator drain pan overflowing

Clean obstructed drain trough

 

 

Evaporator drain pan broken or cracked.

 

Condensation forming on base pan

Reseal or replace. No chassis gasket installed.

 

 

Install chassis gasket

 

Poor installation resulting in rain

Check installation instructions. Reseal as

Water leaks into

entering the room

required

 

Dirty evaporator coil. Use pressure wash

the room

Condensation on discharge grille

or biodegradable cleaning agent to clean.

 

 

louvers

Environmental phenomena: point supply

 

 

louvers upward

 

Chassis gasket not installed

Install gasket, per Installation manual

 

Downward slope of unit is too

Refer to installation manual for proper

 

steep inward

installation

35

Problem

Possible Cause

Action

 

Sublimation:

Ensure that foam gaskets are installed in

 

When unconditioned saturated,

between window panes & in between the

 

outside air mixes with conditioned

unit & the sleeve. Also, ensure that fresh

 

air, condensation forms on the

air/exhaust vents (on applicable models) are in

Water “spitting”

cooler surfaces

the closed position & are in tact

into room

Downward pitch of installation is

Follow installation instructions to ensure that

 

downward pitch of installed unit is no less than

 

too steep towards back of unit

 

1/4” & no more than 3/8”

 

 

 

Restricted coil or dirty filter

Clean & advise customer of periodic cleaning

 

& maintenance needs of entire unit

 

 

Problem

Possible Cause

Action

 

Insufficient air circulation thru area

Adjust louvers for best possible air circulation

 

to be air conditioned

Excessive

 

Oversized unit

Operate in “MoneySaver” position

moisture

Inadequate vapor barrier in building

Advise customer

 

 

structure, particularly floors

 

Problem

Possible Cause

Action

 

Defective thermistor

Replace thermistor or electronic control board

 

T-statdifferential too narrow

Replace t-stat

T-stator

Plenum gasket not sealing,

Check gasket. Reposition or replace as

thermistor

allowing discharge air to short

needed

short cycles

cycle t-stat

 

 

Restricted coil or dirty filter

Clean & advise customer of periodic cleaning

 

& maintenance needs of entire unit

 

 

Problem

Possible Cause

Action

 

Heat anticipator (resistor) wire

 

 

disconnected at t-stator system

Refer to appropriate wiring diagram

 

switch

 

 

 

Disconnect plus from outlet. Remove resistor

Prolonged off

Heat anticipator (resistor) shorted or

from bracket. Insert plug & depress “COOL”

cycles (automatic

& “FAN AUTOMATIC” buttons. Place t-statto

open

operation)

 

warmest setting. Feel resistor for temperature.

 

 

If no heat, replace resistor

 

Partial loss of charge in t-statbulb

Replace t-stat

 

causing a wide differential

 

 

 

Defective thermistor

Replace thermistor or electronic control board

 

 

 

Problem

Possible Cause

Action

 

Evaporator drain pan cracked or

Repair, clean or replace as required

 

obstructed

 

 

 

Water in compressor area

Detach shroud from pan & coil. Clean &

Outside water

remove old sealer. Reseal, reinstall & check

leaks

Obstructed condenser coil

Use pressure wash or biodegradable cleaning

 

agent to clean

 

 

 

Fan blade/slinger ring improperly

Adjust fan blade to 1/2” of condenser coil fin

 

positioned

pack

36

HEAT PUMP TROUBLESHOOTING

Problem

Possible Cause

Action

 

 

Disconnect power to unit. Remove resistor

 

Heat anticipator (resistor) shorted

from t-statbulb block. Plus in unit & allow to

 

(on applicable models)

operate. Feel resistor for heat. If not heat,

Room

 

replace resistor

temperature

Wide differential - partial loss of

Replace t-stat& check

uneven

t-statbulb charge

 

(Heating cycle)

 

Refer to appropriate wiring diagram. Resistor

 

Incorrect wiring

is energized during “ON” cycle of compressor

 

 

or fan.

 

Defective thermistor or control board

Replace thermistor or electronic control board

 

 

 

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to appropriate wiring diagram

 

Defrost control out of calibration

If outside coil temperature is 25°F or below,

 

& preselected time limit has elapsed, replace

 

(applicable models)

 

defrost control

 

 

Unit will not

 

If contacts remain closed between terminals

Defrost control contacts stuck

“2” & “3” of the defrost control after

defrost

preselected time interval has passed, replace

 

 

 

 

control

 

Defrost control bulb removed from

Reinstall & be assured that good bulb to coil

 

or not making good coil contact

contact is made

 

Outdoor coil thermistor

Replace thermistor or electronic control board

 

 

 

Problem

Possible Cause

Action

 

Dirty filter

Clean as recommended in Owner’s Manual

 

 

Check heat rise across coil. If unit operates

 

Unit undersized

efficiently, check if insulation can be added

 

to attic or walls. If insulation is adequate,

 

 

 

 

recommend additional unit or larger one

Does not heat

Outdoor t-statopen (applicable

T-statshould close at 38°F. Check continuity

of control. If temperature is below 38°F,

adequately

models)

replace control

 

 

Heater hi-limitcontrol cycling on &

Check for adequate fan air across heater.

 

Check control for open at 160°F & close at

 

off

 

150°F

 

 

 

Shorted supplementary heater

Ohmmeter check, approx. 32-35ohms

 

 

 

 

Incorrect wiring

Check applicable wiring diagram

 

 

 

 

Defective thermistor or electronic

Replace thermistor or electronic control board

 

control board

 

 

37

HEAT PUMP TROUBLESHOOTING

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to applicable wiring diagram

 

Defective solenoid coil

Check for continuity of coil

 

 

Block condenser coil & switch unit to cooling.

Unit cools when

Reversing valve fails to shift

Allow pressure to build up in system, then

switch to heating. If valve fails to shift, replace

heat is called for

 

 

valve.

 

 

 

Inoperative system switch or defrost

Check for continuity. Replace defective

 

thremostat or outdoor thermistor or

 

component.

 

electronic board

 

 

Problem

Possible Cause

Action

 

Heating capillary tube partially

Check for partially starved outer coil. Replace

 

restricted

heating capillary tube

 

 

Switch unit several times from heating to

Heating

Check valve leaking internally

cooling. Check temperature rise across

insufficient

coil. Refer to specifi cation sheet for correct

 

 

 

temperature rise

 

Reversing valve failing to shift

Deenergize solenoid coil, raise head pressure,

 

energize solenoid to break loose. If valve fails

 

completely; bypassing hot gas

 

to make complete shift, replace valve.

 

 

38

TROUBLESHOOTING TOUCH TEST CHART: TO SERVICE REVERSING VALVES

 

 

 

 

 

 

NORMAL FUNCTION OF VALVE

 

 

DISCHARGE Compressorfrom

SUCTION TUBECompressortoCompressor

 

INSIDEtotoTube COIL

 

to COIL

 

LEFTCapillary

 

RIGHT

 

NOTES:

 

 

 

 

 

 

 

 

 

TUBE

to

 

 

 

OUTSIDE

 

Pilot

 

Pilot Tube

 

 

 

CONDITION

 

Tube

 

OUTSIDE COIL

 

Pilot Tube

TubeCapillary

Pilot

TubeCapillary

 

 

VALVE

DISCHARGE Compressorfrom

SUCTION

 

 

Tube

 

 

 

 

 

OPERATING

TUBE

TUBE

 

COIL

 

Tube

 

LEFT

 

RIGHT Capillary

 

* TEMPERATURE OF VALVE BODY

 

 

 

 

 

 

to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

** WARMER THAN VALVE BODY

 

1

2

 

3

 

4

 

5

 

6

 

POSSIBLE CAUSES

CORRECTIONS

Normal Cooling

Hot

Cool

 

Cool

 

Hot

 

*TVB

TVB

 

 

 

as (2)

 

as (1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal Heating

Hot

Cool

 

Hot

 

Cool

 

*TVB

TVB

 

 

 

as (1)

 

as (2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MALFUNCTION OF VALVE

 

 

Check Electrical circuit and coil

 

 

 

 

 

 

No voltage to coil.

Repair electrical circuit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Defective coil.

Replace coil.

 

 

 

 

 

 

 

 

 

 

 

 

 

Check refrigeration charge

 

 

 

 

 

 

Low charge.

Repair leak, recharge system.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure differential too high.

Recheck system.

 

 

 

 

 

 

 

 

 

 

 

 

Valve will not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Deenergize solenoid, raise head pressure,

shift from cool

 

 

 

 

 

 

 

 

 

 

 

 

reenergize solenoid to break dirt loose.

Hot

Cool

Cool,

Hot,

*TVB

Hot

Pilot valve okay. Dirt in one bleeder hole.

If unsuccessful, remove valve, wash

to heat.

as (2)

as (1)

out. Check on air before installing. If no

 

 

 

 

 

 

 

 

 

 

 

 

 

movement, replace valve, add strainer to

 

 

 

 

 

 

 

 

 

 

 

 

 

discharge tube, mount valve horizontally.

 

 

 

 

 

 

 

 

 

 

 

 

 

Stop unit. After pressures equalize, restart

 

 

 

 

 

 

 

 

 

 

 

 

Piston cup leak

with solenoid energized. If valve shifts,

 

 

 

 

 

 

 

 

 

 

 

 

reattempt with compressor running. If still

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

no shift, replace valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hot

Cool

Cool,

Hot,

*TVB

*TVB

Clogged pilot tubes.

Raise head pressure, operate solenoid to

 

as (2)

as (1)

free. If still no shift, replace valve.

 

 

 

 

 

 

 

 

 

Valve will not

 

 

 

 

 

 

 

 

 

 

 

 

Raise head pressure, operate solenoid

 

 

 

Cool,

Hot,

 

 

 

 

Both ports of pilot open. (Back seat port

to free

shift from cool

Hot

Cool

Hot

 

Hot

partially clogged port. If still no shift,

as (2)

as (1)

 

did not close).

to heat.

 

 

 

 

 

 

 

 

 

 

 

 

replace

 

 

 

 

 

 

 

 

 

 

 

 

valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Warm

Cool

Cool,

Hot,

*TVB

Warm

Defective Compressor.

Replace compressor

 

as (2)

as (1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not enough pressure differential at start

Check unit for correct operating pressures

 

Hot

Warm

Warm

Hot

*TVB

Hot

of stroke or not enough fl ow to maintain

and charge. Raise head pressure. If no

 

 

 

 

 

 

 

 

 

 

 

 

pressure differential.

shift, use valve with smaller port.

 

 

 

 

 

 

 

 

 

 

 

 

Body damage.

Replace valve

Starts to shift

 

 

 

 

 

 

 

 

 

 

 

 

 

Hot

Warm

Warm

Hot

Hot

 

Hot

Both ports of pilot open.

Raise head pressure, operate solenoid. If

but does not

 

no shift, use valve with smaller ports.

 

 

 

 

 

 

 

 

 

 

 

 

complete

Hot

Hot

Hot

Hot

*TVB

Hot

Body damage.

Replace valve

reversal.

 

 

 

 

 

 

 

 

 

 

 

Valve hung up at mid-stroke.Pumping

Raise head pressure, operate solenoid. If

 

 

 

 

 

 

 

 

 

 

 

 

volume of compressor not suffi cient to

no shift, use valve with smaller ports.

 

 

 

 

 

 

 

 

 

 

 

 

maintain reversal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Raise head pressure, operate solenoid.

 

Hot

Hot

Hot

Hot

Hot

 

Hot

Both ports of pilot open.

If no

 

 

 

 

 

 

 

 

 

 

 

 

 

shift, replace valve.

Apparent

Hot

Cool

Hot,

Cool,

*TVB

*TVB

Piston needle on end of slide leaking.

Operate valve several times, then recheck.

as (1)

as (2)

If excessive leak, replace valve.

leap in heat-

 

 

 

 

 

 

 

 

 

 

 

Hot,

Cool,

 

 

 

 

 

Operate valve several times, then recheck.

ing.

Hot

Cool

**WVB

**WVB

Pilot needle and piston needle leaking.

as (1)

as (2)

If excessive leak, replace valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hot

Cool

Hot,

Cool,

*TVB

*TVB

Pressure differential too high.

Stop unit. Will reverse during equalization

 

as (1)

as (2)

period. Recheck system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged pilot tube.

Raise head pressure, operate solenoid to

 

 

 

 

 

 

 

 

 

 

 

 

free dirt. If still no shift, replace valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Raise head pressure, operate solenoid.

 

 

 

 

Hot,

Cool,

 

 

 

 

 

Remove valve and wash out. Check on air

 

Hot

Cool

Hot

 

*TVB

Dirt in bleeder hole.

before reinstalling, if no movement, replace

 

as (1)

as (2)

 

Will not shift

 

 

 

 

 

 

 

 

valve. Add strainer to discharge tube.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mount valve horizontally.

from heat to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stop unit. After pressures equalize, restart

cool.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hot,

Cool,

 

 

 

 

 

with solenoid deenergized. If valve shifts,

 

Hot

Cool

Hot

 

*TVB

Piston cup leak.

reattempt with compressor running. If it

 

as (1)

as (2)

 

 

 

 

 

 

 

 

 

 

still will not reverse while running, replace

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

the valve.

Hot

Cool

Hot,

Cool,

Hot

 

Hot

Defective pilot.

Replace valve.

 

as (1)

as (2)

 

 

 

 

 

 

 

 

 

 

 

 

Warm

Cool

Warm,

Cool,

Warm

*TVB

Defective compressor.

Replace compressor

 

as (1)

as (2)

 

 

 

 

 

 

 

 

 

 

39

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

COOL ONLY MODELS:

WS08B10A-D,A-FWS10BIOA-DWS14B10A-D

WS14B10A-EWS10B30A-D

WS13B30B-E,B-FWS16B30A-D,A-E

40

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

COOL WITH ELECTRIC HEAT MODELS: WE10B33C-AWE13B33C-AWE16B33C-A

41

WALLMASTER WIRING DIAGRAM

ELECTRONIC CONTROL

HEAT PUMP WITH ELECTRIC HEAT MODELS:

WY10B33C-AWY13B33C-A

42

WALLMASTER WIRING DIAGRAM

ELECTROMECHANICAL CONTROL

COOL WITH ELECTRIC HEAT MODELS:

WE10B33A-CWE13B33B-D,B-EWE16B33A-C,A-D

43

WALLMASTER WIRING DIAGRAM

ELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS:

WY10B33A-C,A-DWY13B33A-C,A-D

44

Installation Accessories

DK / Drain Kit

 

SB / Sub Base

 

Installed at the back of the unit and allows

 

Used as a base for the unit when

for attachment to permanent condensate

 

it is desired to place the cord and

disposal system, if disposal is necessary

 

receptacle within the installation, or

or desired.

 

simply as a base for the unit when

 

 

mounted low in the wall.

 

 

 

IDK / Internal Drain Kit

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

Necessary when installing in a sleeve deeper than 16 3/4" deep, such as

Fedders B sleeve (19 3/4" deep).

6 3/4

 

 

 

 

 

B

 

 

F dd

 

 

 

 

9 3/4

 

 

 

Exterior Grilles

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.

WSC S

O

A ch

G

AG

Standard Grille

CORRECT Vertical Louvers

INCORRECT Horizontal Louvers

45

INSTALLATION INSTRUCTIONS

FOR “WSC” SLEEVE

MOUNTING HARDWARE PROVIDED

ITEM

DESCRIPTION

QTY.

NO.

 

 

1

SCREW, #12A X 2”

5

 

 

 

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-BASESB–89or other unit supportmust 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 floor. Where the sub–baseis required, the minimum distance from the floor 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).

FIGURE 1

MINIMUM OF 24” REQUIRED

 

 

FROM TOP OF UNIT TO CEILING.

 

 

INSIDE

 

LINTELS

WALL

 

MINIMUM OF 1”

 

WSC SLEEVE

SPACING REQUIRED

 

 

ON ALL SIDES OF

 

 

THE UNIT.

7/8” MINIMUM

 

1” MINIMUM

DRAIN

 

EXTENSION

3 1/2” FOR

 

 

 

SUBBASE

 

 

 

 

9/16” MINIMUM

 

 

OUTSIDE WALL

46

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.

FIGURE 2

RAISED LEDGE

BACK UNIT REST

LEVEL

FRONT UNIT REST

WARNING

MECHANICALCUT/SEVER HAHAZARD

CUT/SEVER

Sharp edges and corners. Be careful with

Be careful with the sharp edges and corners. sharp edges and corner. Wear protective

clothingWear protectiveand gloves,clothingetc. and gloves, etc. Failure to do so could result in serious injury.

Failure to do so could result in serious injury.

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):

STEP 2

STEP 3 STEP 4

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).

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.

47

WARNING

MECHANICALCUT/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.

48

SEALING GASKET INSTALLATION INSTRUCTIONS

WARNING

MECHANICAL HAZARD

MECHANICALCUT/SEVER HAZARD

Sharp edges and corners. Be careful with

Be careful with the sharp edges and corners. sharp edges and corner. Wear protective

Wear protective clothing and gloves, etc. clothing and gloves, etc.

Failure to do so could result in serious injury.

Failure to do so could result in serious injury.

Remove the black rubber gasket from the air discharge plenum of the air conditioner (see fig. A). Look inside the wall sleeve and check to see if a black rubber gasket is already in place along the bottom front (see fig. B). If one is not in place, thoroughly clean the sleeve area between the front unit rests and the raised ledge (see fig. 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 fig. B). Once the gasket has been properly applied, the sleeve is ready for the air conditioner to be installed per the installation instructons.

FIGURE A

AIR DISCHARGE PLENUM

FIGURE B

RAISED LEDGE

SIDE PROFILE OF WALL SLEEVE

FRONT UNIT REST

GASKET

49

INSTALLATION INSTRUCTIONS FOR INTERNAL DRAIN KIT

(IDK)

Apply Sealer to the bottom of the Drain Plate

Wall Sleeve

Drill a .625”

diameter hole here

Sleeve

Base

Dimple

0.5” In from edge

 

4.75” From

Drill a .625”

back of

basepan

diameter

 

hole in the

 

bottom of

 

the basepan

 

WARNING

WARNING

MECHANICAL HAZARD MECHANICALCUT/SEVER HAZARD

edges and corners. Be careful with sharpBe carefuledgeswithandthecornersharp. Wearedgesprotectiveand corners. Wearandprotectivegloves,clothingetc. and gloves, etc. Failure to do so could result in serious injury.

to do so could result in serious injury.

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.DRILLA .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.

50

WARNING

MECHANICALCUT/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

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.

51

WARNING

MECHANICALCUT/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.

52

WARNING

MECHANICALCUT/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.

53

WARNING

MECHANICALCUT/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.

54

Friedrich Air Conditioning Company

P.O. Box 1540

San Antonio, TX 78295

210.357.4400

www.friedrich.com

WALLMASTER®

THRU-THE-WALLAIR 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 Organizationin 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)

55

TECHNICAL SUPPORT CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Office 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 Office 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)