Friedrich QUIETMASTER 2009 User Manual

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Service Manual

Temperature

 

 

Cooler

Warmer

 

 

Cool

 

 

Fan

 

Power

 

Fan

Money

Only

Speed

Timer

Saver

 

On/O Operation

 

Start

Stop

Set Hr.

 

 

 

Temperature

 

 

Cooler

 

Cool

 

Fan

Fan

Only

Speed

Timer

Operation

On/Off

Start

Stop

Warmer

Power

Money

Saver

Set Hr.

Room Air Conditioners

Models 2009 2008

RAC-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 ......................................................................................................................................................................

5

Unit Identification .............................................................................................................................................................

6

Chassis Specifications for 2009, 2008 Models ...............................................................................................................

7

Installation Information/Sleeve Dimensions ....................................................................................................................

8

Performance Data ...........................................................................................................................................................

9

Electrical Data ...............................................................................................................................................................

10

Before Operating the Unit ..............................................................................................................................................

11

How to Operate the QM Programmable ........................................................................................................................

12

How to Use the QM Programmable Remote Control .....................................................................................................

13

How to Operate the XQ ..................................................................................................................................................

14

How to Use the XQ Remote Control ..............................................................................................................................

15

How to Operate the QM and Twintemp ....................................................................................................................

16-17

Testing the Electronic Control and Error Code Listings .............................................................................................

17-18

Testing the Rotary Control Switches ..........................................................................................................................

19-20

Functional Component Definition ...................................................................................................................................

20

Components Testing ...................................................................................................................................................

21-24

Defrost Thermostat Operation ........................................................................................................................................

24

Electronic Control Sequence of Operation .....................................................................................................................

25

Refrigeration Sequence of Operation .............................................................................................................................

26

Sealed Refrigeration System Repairs .......................................................................................................................

27-30

Hermetics Components Check ......................................................................................................................................

31

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

32

Testing the Coil ..............................................................................................................................................................

33

Checking the Reversing Valve ..................................................................................................................................

33-34

Compressor Checks ..................................................................................................................................................

35-36

Compressor Replacement .........................................................................................................................................

37-38

Routine Maintenance .................................................................................................................................................

39-40

Troubleshooting .........................................................................................................................................................

41-48

Wiring Diagrams ........................................................................................................................................................

49-58

Instructions for using Cooling Load Estimate Form ........................................................................................................

58

Cooling Load Estimate Form ..........................................................................................................................................

60

Heat Load Form .........................................................................................................................................................

61-62

Warranty ..........................................................................................................................................................................

63

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

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.

4

Introduction

This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component.

This service manual was written to assist the professional RAC service technician to quickly and accurately diagnose and repair malfunctions.

This manual will deal with subjects in a general nature. (i.e. all text will not pertain to all models).

TYPICAL UNIT COMPONENTS

Fresh Air

Compressor

Capillary Tube

 

Liquid Filter Driers

Reversing Valve

 

Condenser Coil

(some models)

 

 

 

 

 

Front Cover

 

 

Discharge Air

System Switches

 

 

 

Outdoor Grille

Evaporator Coil

 

 

 

 

 

 

 

Sleeve

 

 

Return Air Grille/Filter

 

 

 

 

Blower Wheel

 

 

 

 

Blower Motor

Basepan

Condenser Fan Blade

 

 

 

 

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 on page 6).

5

Unit Identification

Model Number Code

S S 08 L 1 0 E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8th Digit – Engineering

1st Digit – Function

 

 

 

 

 

 

 

 

 

 

Major change

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S = Straight Cool, Value Series

 

 

 

 

 

 

 

 

 

 

 

Y = Heat Pump

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7th Digit – Options

E = Electric Heat

 

 

 

 

 

 

 

 

K = Straight Cool

 

 

 

 

0

= Straight Cool &

R = Straight Cool

 

 

 

 

 

 

 

 

Heat Pump Models

X = Straight Cool

 

 

 

 

1

= 1 KW Heat Strip, Nominal

 

 

 

 

 

 

 

3

= 3 KW Heat Strip, Nominal

 

 

 

 

 

4

= 4 KW Heat Strip, Nominal

 

 

 

 

 

 

5

= 5 KW Heat Strip, Nominal

 

 

 

 

 

 

 

 

 

 

 

 

2nd Digit

 

 

 

 

 

 

 

 

 

 

 

Q = Q-Star

 

 

 

 

 

 

 

 

 

 

 

S = Small Chassis

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6th Digit – Voltage

M = Medium Chassis

 

 

 

 

 

 

 

L = Large Chassis

 

 

 

1

= 115 Volts

H = HazardGard

 

 

 

 

 

 

3

= 230-208Volts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5th Digit

3rd and 4th Digit - Approximate Alphabetical Modifier

BTU/HR in 1000s (Cooling)

Heating BTU/Hr capacity listed in the

Specification/Performance Data Section

RAC Serial Number Identification Guide

Serial Number

 

L

H

G

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

 

 

 

 

Product Line

 

 

 

 

 

Year Manufactured

 

 

 

 

A=1

D=4

G=7

K=0

 

 

 

R = RAC

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

 

 

 

 

 

 

 

 

 

 

 

 

6

Chassis Specifications for 2009, 2008 models

ENERGY STAR® Models

 

 

 

 

Electrical Characteristics (60 Hertz)

Energy

Coefficient

 

 

 

 

 

 

Cooling

Heating

Efficiency

Of

Moisture

Room Side

 

Weight

 

 

 

 

 

 

 

 

 

 

Capacity

Capacity

Volts

Cooling

Cooling

Heating

Heating

Ratio

Performance

Removal

Air Circulation

 

Lbs.

Model

BTU/h

Rated

Rated

Amps

Watts

Amps

Watts

EER

COP

Pints/Hr.

CFM

Sleeve*

Ship/Net

ULTRA PREMIUM LINE

 

 

 

 

 

 

 

 

 

 

 

 

QUIETMASTER Programmable

 

 

 

 

 

 

 

 

 

 

 

SS08L10

 

8400

115

6.6

737

11.4

 

1.6

265

S

114/108

SS10L10

 

10400

115

7.5

867

12.0

 

2.5

260

S

121/115

SS12L10

 

11800

115

9.0

1000

11.8

 

2.5

350

S

120/114

SS14L10

 

14000

115

12.0

1305

10.7

 

3.5

377

S

134/128

SS12L30

 

12100/11900

230/208

4.8/5.0

1052/1017

11.5/11.7

 

2.9

320

S

120/114

SS16L30

 

16200/15900

230/208

7.4/8.0

1653/1656

9.8/9.6

 

4.7

360

S

125/119

SM18L30A

 

17500/17300

230/208

7.2/7.7

1620/1570

10.8/10.8

 

4.5

375

M

169/163

SM21L30

 

20600/20200

230/208

9.4/10.1

2081/2020

9.9/10.0

 

6.0

425

M

160/154

SM24L30

 

23500/23000

230/208

11.2/12.1

2479/2421

9.5/9.5

 

7.0

400

M

160/154

XSTAR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XQ05L10A

 

5500

115

5.0

500

11.0

 

1.2

200

Q

76/70

XQ06L10A

 

6300

115

4.9

548

11.5

 

1.4

175

Q

76/70

XQ08L10A

 

8000

115

6.8

741

10.8

 

1.9

175

Q

83/77

XQ10L10A

 

10000

115

9.0

1000

10.0

 

3.2

180

Q

89/83

XQ12L10A

 

11700

115

11.0

1198

9.8

 

3.2

200

Q

89/83

PREMIUM LINE

 

 

 

 

 

 

 

 

 

 

 

 

QUIETMASTER

 

 

 

 

 

 

 

 

 

 

 

 

 

KS12L10

 

11600

115

9.0

1055

11.0

 

2.5

356

S

120/114

KS15L10

 

14500

115

12.0

1343

10.8

 

3.5

377

S

134/128

KM18L30

 

17800/17600

230/208

8.1/8.8

1780/1760

10.0/10.0

 

4.4

400

M

167/161

KM24L30

 

23500/23000

230/208

11.2/12.1

2479/2421

9.5/9.5

 

7.0

400

M

160/154

SL28L30

 

28000/27700

230/208

13.0/14.2

2947/2916

9.5/9.5

 

8.8

600

L

207/201

SL36L30A

 

36000/35700

230/208

18.0/19.6

4235/4200

8.5/8.5

 

11.0

725

L

226/220

TWINTEMP Heat Pump

 

 

 

 

 

 

 

 

 

 

 

 

YS09L10**

 

9200

7400

115

7.4

767

6.9

733

12.0

3.0

1.7

300

S

117/113

YS13L33

 

12700/12500

11000/10500

230/208

5.1/5.6

1149/1131

5.3/5.8

1185/1167

11.0/11.0

2.5/2.6

3.5

325

S

121/117

YM18L34

 

18000/18000

16800/16400

230/208

8.5/9.5

1895/1895

8.5/9.0

1867/1822

9.5/9.5

2.8/2.9

4.7

400

M

170/166

YL24L35

 

24000/24000

22000/21600

230/208

10.9/12.0

2400/2400

11.0/12.0

2444/2400

10.0/10.0

2.7/2.8

7.0

600

L

202/198

TWINTEMP Electric Heat

 

 

 

 

 

 

 

 

 

 

 

 

EQ08L11A

 

7700

4000

115

6.5

733

11.2

1290

10.5

 

1.9

175

Q

80/76

ES12L33

 

12100/11900

10700/8900

230/208

4.8/5.0

1052/1017

16.0/14.7

3500/2900

11.5/11.7

 

2.9

320

S

115/111

ES16L33

 

16200/15900

10700/8900

230/208

7.4/8.0

1653/1656

16.0/14.7

3500/2900

9.8/9.6

 

4.7

360

S

120/116

EM18L34

 

17800/17600

13000/10600

230/208

8.1/8.8

1780/1760

19.5/17.0

4200/3500

10.0/10.0

 

4.4

400

M

164/160

EM24L34

 

23500/23000

13000/10600

230/208

11.2/12.1

2479/2421

19.5/17.0

4200/3500

9.5/9.5

 

7.0

400

M

160/154

EL36L35A

 

36000/35700

17300/14300

230/208

18.0/19.6

4235/4200

24.0/22.4

5500/4650

8.5/8.5

 

11.0

725

L

224/220

*Sleeve dimensions listed on opposite page.

**Operates on 115 volt and is not equipped with supplemental heat. Will not provide heat at temperatures below 40°F. Friedrich room air conditioners are designed to operate in outdoor temperatures from 50° F to 115° F.

TwinTemp Heat Pump heating information (shown in red) indicates heat pump heating performance. TwinTemp Electric Heat heating information(shown in red) indicates electric heat strip performance. For TwinTemp Heat Pump electric heating performance refer to corresponding TwinTemp Electric Heat model.

Due to continuing research in new energy-savingtechnology, specifications are subject to change without notice.

As an ENERGY STAR® partner, Friedrich Air Conditioning Co. has determined that the selectedENERGY STAR® ( ) models meet theENERGY STAR® guidelines for energy efficiency.

The consumerthrough the AHAM Room Air Conditioner Certification Programcan be certain that the AHAM Certification Seal accurately states the unit’s cooling and heating capacity rating, the amperes and the energy efficiency ratio.

7

installation information / sleeve dimensions

 

 

 

Depth

Shell Depth to

 

 

 

 

 

Thru-the-wallInstallation

 

 

 

Minimum

Minimum

Window Width

 

Finished Hole

 

 

 

with Front

Louvers

Extension

Extension

 

 

 

 

 

Sleeve

Height

Width

 

 

Into Room*

Outside*

Minimum**

Maximum

Height

Width

Max. Depth

Q

14"

19 ¾"

21 38"

8 ½"

5 ½"

10 ¾"

22"

42"

14 ¼"

20"

8 ½”

S

15 1516"

25 1516"

27 38"

8 ¾"

3 116"

16 1516"

27 3 8"

42"

16 316"

26 316"

7 3 8"

M

17 1516"

25 1516"

27 38"

8 ¾"

3 116"

16 1516"

27 3 8"

42"

18 316"

26 316"

7 3 8

L

20 316"

28"

33 58"

16 ½"

3 316"

18 1516"

29 78"

42"

20 38"

28 ¼"

15 18"

*Minimum extensions when mounted in a window.

**Minimum widths achieved using one side curtain assembly as opposed to both in a standard installation.

Sleeve P1 does not have thru-the-wallhole dimensions, as these units are fixed chassis and should not be installedthru-the-wall.NOTE: S,M and L sleeves may be installed in window with no side kits if properly installed.

Circuit Rating / Breaker

 

Circuit Rating

 

Power Cord

 

 

 

 

 

Breaker or

Plug Face

Wall Outlet

 

Model

T-DFuse

(NEMA#)

Length (ft.)

Appearance

 

All XQ MODELS.

125V - 15A

5 - 15P

6

 

 

 

 

KS12L10 and KS15L10. SS08L10, SS10L10,

 

 

 

 

 

 

 

 

 

 

 

 

SS12L10 and SS14L10. EQ08L11A.

 

 

 

 

 

 

Front

YS09L10.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KM18L30.

250V - 15A

6 - 15P

4

 

 

 

 

SS12L30, SS16L30, SM18L30A and

 

 

 

 

 

 

 

 

SM21L30.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KM24L30. SM24L30 and SL28L30.

250V - 20A

6 - 20P

4

 

 

 

 

 

 

 

 

ES12L33 and ES16L33. YS13L33.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SL36L30A. EM18L34, EM24L34 and

250V - 30A

6 - 30P

4

 

 

 

 

EL36L35A. YM18L34 and YL24L35.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SIDE VIEW

Window Mounting Kits

TwinTemp Model

Kit No.

EQ08L11A

WIKQ

 

 

ES12L33, ES16L33, YS09L10 and YS13L33.

WIKS

 

 

EM18L34, YM18L34 and EM24L34.

WIKM

 

 

EL36L35A and YL24L35.

WIKL

 

 

TWINTEMP® models include accessories forthru-the-wallinstallation only. Window mounting requires use of optional accessory kit as listed above.

8

PERFORMANCE DATA for 2009, 2008 models

Q-Chassis

S-Chassis

M-Chassis

L-Chassis

COOLING

EVAP. AIR TEMP. DEG. F

CONDENSER

 

 

 

 

OPERATING PRESSURES

ELECTRICAL RATINGS

R-22REF.

 

BREAKER FUSE

 

 

Discharge Temp

Suction Temp

Super Heat

Sub-Cooling

 

 

 

 

 

 

Voltage

 

PERFORMANCE DATA*

Discharge Air

Temp.

TEMPERATURE DEG. F

Suction

Discharge

Amps Cool

Amps Heat

Locked Rotor

Charge in

60 Hertz Amps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drop F.

 

 

 

 

 

 

 

 

 

Amps

OZ.

 

 

XQ05L10A-C

56

24

119

151

58

13

20

89

255

4.9

 

28.0

21.4

115

15

XQ06L10A-C

55

26

121

157

65

13

27

87

261

5.0

 

24.0

21.0

115

15

XQ08L10A-B

52

29

128

167

60

13

33

81

283

6.8

 

36.2

22.1

115

15

XQ08L10A-E

52

29

125

161

49

13

24

81

280

6.7

 

36.2

19.8

115

15

XQ10L10A-C

50

31

130

176

65

20

29

75

287

9.2

 

44.0

19.2

115

15

XQ12L10A-B

51

29

126

166

51

6

30

75

271

11.0

 

56.0

31.0

115

15

XQ12L10A-C

51

29

126

166

51

6

30

75

271

11.0

 

56.0

31.0

115

15

EQ08L11A-B

52

29

124

173

69

21

29

82

283

6.5

10.7

36.2

20.0

115

15

EQ08L11A-E

52

29

125

161

49

13

24

81

280

6.7

10.7

36.2

19.8

115

15

SS08L10-E

56

24

116

157

68

16

18

86

250-260

6.6

 

36.2

27.0

115

15

SS08L10-F

56

24

116

157

68

16

18

86

250-260

6.6

 

36.2

27.0

115

15

SS08L10-G

53

24

116

157

57

13

23

85

250-260

6.5

 

36.2

27.0

115

15

SS10L10-D

57

23

117

166

65

16

23

82

243

7.5

 

42.0

26.0

115

15

SS10L10-E

57

23

117

166

65

16

23

82

243

7.5

 

42.0

26.0

115

15

KS12L10-E

52

28

122

170

60

12

26

83

266

9.0

 

44.0

30.0

115

15

KS12L10-F

52

28

122

170

60

12

26

83

266

9.0

 

44.0

30.0

115

15

SS12L10-E

53

27

124

169

62

13

30

82

266

9.3

 

44.0

32.0

115

15

SS12L10-F

53

27

124

169

62

13

30

82

266

9.3

 

44.0

32.0

115

15

KS15L10-C

51

30

125

182

62

16

29

77

278

12.2

 

61.0

29.0

115

15

KS15L10-D

51

30

125

182

62

16

29

77

278

12.2

 

61.0

29.0

115

15

SS14L10-D

53

27

125

184

62

15

27

78

268

12.3

 

61.0

29.2

115

15

SS14L10-E

53

27

125

184

62

15

27

78

268

12.3

 

61.0

29.2

115

15

SS12L30-E

58

22

122

174

66

17

28

84

261

4.7

 

21.0

31.0

208 / 230

15

SS12L30-F

58

22

122

174

66

17

28

84

261

4.7

 

21.0

31.0

208 / 230

15

SS16L30-D

50

31

130

176

53

8

35

77

279

7.9

 

35.0

32.1

208 / 230

15

SS16L30-E

50

31

130

176

53

8

35

77

279

7.9

 

35.0

32.1

208 / 230

15

ES12L33-D

58

22

122

174

66

17

28

84

261

4.7

15.1

21.0

31.0

208 / 230

20

ES12L33-E

58

22

122

174

66

17

28

84

261

4.7

15.1

21.0

31.0

208 / 230

20

ES16L33-C

49

32

130

179

50

8

34

75

279

7.4

15.1

35.0

32.0

208 / 230

20

ES16L33-D

49

32

130

179

50

8

34

75

279

7.4

15.1

35.0

32.0

208 / 230

20

YS09L10-F

64

16

116

164

71

20

19

87

249

7.4

7.0

44.0

28.0

115

15

YS09L10-G

64

16

116

164

71

20

19

87

249

7.4

7.0

44.0

28.0

115

15

YS13L33-D

51

29

122

172

65

18

30

80

269

5.5/5.1

5.7/5.3

24.0

32.0

1

20

YS13L33-E

51

29

122

172

65

18

30

80

269

5.5/5.1

5.7/5.3

24.0

32.0

1

20

KM24L30-C

50

31

132

187

56

14

37

70

287

11.2

 

68.0

53.0

208 / 230

20

KM24L30-D

50

31

132

187

56

14

37

70

287

11.2

 

68.0

53.0

208 / 230

20

YM18L34-D

61

19

126

187

67

24

28

73

280

9.2/8.75

8.8/8.3

41.0

43.0

208/230

30

YM18L34-E

61

19

126

187

67

24

28

73

280

9.2/8.75

8.8/8.3

41.0

43.0

208/230

30

EM18L34-C

49

31

125

175

63

21

31

72

271

8.1

18.9

42.0

39.5

208 / 230

15

KM18L30-C

49

31

125

175

63

21

31

72

271

8.1

 

42.0

39.5

208 / 230

15

KM18L30-D

49

31

125

175

63

21

31

72

271

8.1

 

42.0

39.5

208 / 230

15

SM18L30A-D

54

26

121

171

61

13

25

81

262

7.7/7.1

 

37.0

45.0

208/230

15

SM18L30A-E

54

26

121

171

61

13

25

81

262

7.7/7.1

 

37.0

45.0

208/230

15

SM21L30-E

48

32

125

173

52

13

25

75

278

9.6/9.3

 

43.0

43.0

208/230

15

SM21L30-F

48

32

125

173

52

13

25

75

278

9.6/9.3

 

43.0

43.0

208/230

15

EM24L34-B

50

31

132

187

56

14

37

70

287

11.2

25.0

68.0

53.0

208 / 230

30

SM24L30-C

50

31

132

187

56

14

37

70

287

11.2

 

68.0

53.0

208 / 230

20

SM24L30-D

50

31

132

187

56

14

37

70

287

11.2

 

68.0

53.0

208 / 230

20

SL28L30-D

53

28

128

172

56

13

29

73

259

13.0

 

68.0

50.1

208 / 230

20

SL28L30-E

53

28

128

172

56

13

29

73

259

13.0

 

68.0

50.1

208 / 230

20

SL36L30A-D

49

31

133

192

53

12

37

70

287

17.2

 

91.0

57.6

208 / 230

30

SL36L30A-E

49

31

133

192

53

12

37

70

287

17.2

 

91.0

57.6

208 / 230

30

EL36L35A-D

49

32

133

194

53

13

38

70

302

18.0

25.0

91.0

60.0

208 / 230

30

EL36L35A-E

49

32

133

194

53

13

38

70

302

18.0

25.0

91.0

60.0

208 / 230

30

YL24L35-E

52

28

124

175

65

22

29

74

268

11.9/11.1

11.7/11.0

68.0

73.0

208/230

30

YL24L35-F

52

28

124

175

65

22

29

74

268

11.9/11.1

11.7/11.0

68.0

73.0

208/230

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all systems use R22.

9

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.

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

10

WARNING: Before operating your unit

Make sure the wiring is adequate for your unit.

If you have fuses, they should be of the time delay type. Before you install or relocate this unit, be sure that the amperage rating of the circuit breaker or time delay fuse does not exceed the amp rating listed in Figure 1.

DO NOT use an extension cord.

The cord provided will carry the proper amount of electrical power to the unit; an extension cord will not.

Make sure that the receptacle is compatible with the air conditioner cord plug provided.

This insures proper grounding. If you have a two prong receptacle you will need to have it replaced with a grounded receptacle by a certified electrician. The grounded receptacle should meet all national and local codes and ordinances. Under no circumstances should you remove the ground prong from the plug. You must use the three prong plug furnished with the air conditioner.

Test the power cord

All Friedrich room air conditioners are shipped from the factory with a Leakage Current Detection Interrupter (LCDI) equipped power cord. The LCDI device meets the UL and NEC requirements for cord connected air conditioners.

To test your power supply cord:

1.Plug power supply cord into a grounded 3 prong outlet.

2.Press RESET (See Figure 2).

3.Press TEST (listen for click; Reset button trips and pops out).

4.Press and release RESET (listen for click; Reset button latches and remains in). The power supply cord is ready for operation.

NOTE: LCDI device is not intended to be used as a switch.

Once plugged in the unit will operate normally without the need to reset the LCDI device.

If the device fails to trip when tested or if the power supply cord is damaged it must be replaced with a new supply cord from the manufacturer. We recommend you contact our Technical Assistance Line at (800)541-6645ext. 845. To expedite service, please have your model and serial number available.

WARNING

ELECTRICAL SHOCK HAZARD

Make sure your electrical receptacle has the same configuration as your air conditioner’s plug. If different, consult a Licensed Electrician.

Do not use plug adapters.

Do not use an extension cord.

Do not remove ground prong.

Always plug into a grounded 3 prong outlet. Failure to follow these instructions can result in electrical shock, serious injury or death.

 

CIRCUIT RATING

REQUIRED WALL

 

OR TIME DELAY

RECEPTACLE

MODEL

FUSE

 

 

AMP

VOLT

NEMA

 

NO.

 

 

 

SS08 • SS10 • SS12 • SS14

15

125

5-15R

KS12 • KS15 • YS09 • XQ05

 

 

 

XQ06 • XQ08 • XQ10 • XQ12

 

 

 

EQ08

 

 

 

 

 

 

 

SS12 • SS16 • SM18

15

250

6-15R

SM21 • KM18

 

 

 

 

 

 

 

SM24 • SL28 • KM24

20

250

6-20R

YS13 • ES12 • ES16

 

 

 

 

 

 

 

SL36 • YM18 • YL24

30

250

6-30R

EM18 • EM24 • EL36

 

 

 

Figure 1

NOTE: Your LCDI device will resemble one of these illustrations.

RESET

TEST

 

 

 

 

 

RESET

WARNING

 

 

TEST BEFORE EACH USE

 

 

1. PRESS RESET BUTTON

 

TEST

2. PLUG LDCI INTO POWER

RECEPTACLE

3. PRESS TEST BUTTON, RESET BUTTON SHOULD

POP UP

4. PRESS TEST BUTTON, FOR USE

DO NOT USE IF ABOVE TEST FAILS

WHEN GREEN LIGHT IS ON IT IS WORKING PROPERLY

Figure 2

For the best cooling performance and highest energy efficiency

Keep the filter clean

Make sure that your air conditioner is always in top performing condition by cleaning the filter regularly.

Provide good air flow

Make sure the airflow to and from the unit is clear. Your air conditioner puts the conditioned air out at the top of the unit, and takes in unconditioned air at the bottom. Airflow is critical to good operation. It is just as important on the outside of the building that the airflow around the unit exterior is not blocked.

Unit placement

If your air conditioner can be placed in a window or wall that is shaded by a tree or another building, the unit will operate even more efficiently. Using drapes or blinds on the sunny side of the dwelling will also add to your unit’s efficiency.

Insulation

Good insulation will be a big help in maintaining desirable comfort levels. Doors should have weather stripping. Be sure to caulk around doors and windows.

Proper installation of seal gasket

Make sure the seal gasket has been installed properly to minimize noise and improve efficiency. If the seal gasket has not been installed, please refer to Step 14 of the installation instructions.

Also, if you switch from Cool mode toFan Only, and switch back to COOL mode, there is a three minute delay before the compressor comes back on.

11

How to operate the Friedrich room air conditioner (QuietMaster Programmable)

To start unit

1If your air conditioner is installed and plugged into a proper receptacle, it is ready to go. Touch 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. There is a 3- minute delay before the compressor will turn on. (See "Automatic Component Protection" on this page).

2Should the Check Filter light turn on when yourst turn on the unit, touchCheck Filter to turn off the light.Check Filter light will come on after 250 hours of use. Clean filter.

Touch Check Filter to reset.

To set mode of operation

3When yourst turn on the unit, it will be in theCool mode (light on), with constant fan.

4Touch MoneySaver® (light on) to activate the MoneySaver® feature. This cycles the fan with the compressor so that the fan does not run all the time. This saves energy and improves dehumidication. (MoneySaver® will also run the fan to sample the return air temperature if the off cycle is too long). Or you may prefer constant fan for more air movement. To return to constant fan, touchCool.

5Touch Fan Only (light on) if you want only the fan to run. You may want to use this feature in conjunction with theFresh Air / Exhaust lever to bring outside air into a room, or to exhaust stale air. (See page 7, "Fresh Air and Exhaust Control" for more information.)

To adjust temperature [60°F (16°C) to 90°F (32°C)]

6COOLER – Touchand hold until the display shows the desired room temperature.

7WARMER – Touchand hold until the display shows the desired room temperature.

8FAHRENHEIT / CELSIUS – Touch ºF / ºC to show the temperature in Celsius, touch again to show Fahrenheit.

To adjust fan speed

9Touch 1-4 Speed to see current setting. Touch again to change speed. F1 is the lowest setting (SLEEP SETTING), F2 is low speed (LOW), F3 is medium speed (MED), F4 is high speed (HIGH).

To activate smart fan

10Touch Smart Fan (light on). Smart Fan will adjust the fan speed automatically to maintain the desired comfort level. For example, if the outside doors in your home are open 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. Smart Fan cannot be activated in theFan Only mode.

To deactivate smart fan

11 Touch 1-4 Speed, and select your desired fan speed.

Figure 3

DISPLAY

 

 

Set

Check

2

 

 

 

 

Hour

Filter

 

 

 

 

 

 

 

 

 

 

Press to reset

12

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

4

3

 

 

 

Money

Fan

 

 

 

 

 

5

 

 

Mode

 

Saver®

Only

 

 

 

 

 

 

6

 

 

 

 

OF/OC

8

 

 

Temp

 

 

 

 

 

 

 

7

9

11

 

 

 

 

 

1-4

Smart

 

 

 

 

Fan

Speed

Fan

 

10

 

 

 

 

 

 

 

 

 

 

 

 

14

13

 

 

A/C

A/C

Timer

 

 

 

 

15

 

 

Timer

Stop

Start

On/O

 

 

 

 

 

 

To set the timer

NOTE: Set Hour clock before attempting to set timer functions.

You can set the A/C Start andA/C Stop timer a minimum of one hour apart and a maximum of 23 hours apart.

13TIMER STOP - Press theA/C Stop button and continue pressing until the hour you want the unit to shut off appears in the display (A.M. or P.M.). The stop time for cooling will then be set.

14START TIME - PressA/C Start to view the current start time for cooling. Continue pressing until the hour you want the unit to start appears in the display (A.M. or P.M.). The start time for cooling will then be set.

15Press the Timer On/ Off button once to activate (light on) the timer function. TouchTimer On/ Off again (light off) to cancel the timer function if you so desire. Once the on and off times have been selected, they will remain in memory, and cycle daily until changed.

NOTE: If unit is unplugged or power is interrupted, theSet Hour button must be reset or theTimer On/ Off functions will not work.

To set hour clock

12Press Set Hour once to see the current clock setting. Continue pressing the button until the hour closest to the actual time appears in the display.

MAKE SURE YOU SET A.M. AND P.M. PROPERLY. A light will appear in the upper left corner of the display when the hour is P.M.

NOTE: Minutes will NOT show on display.

Automatic component protection

Your unit is equipped with Automatic Component Protection.

To protect the compressor of the unit, there is a three minute time delay if you turn the unit off or if power is interrupted. The fan will not be affected.

12

How to use the remote control* (QuietMaster Programmable)

To start unit

1POWER - Press thePower button once. The unit will automatically turn on 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. You may want to use this feature in conjunction with theFresh Air/ Exhaust if you want to bring outside air into the room, or exhaust stale air.

4MoneySaver® - Press theMoneySaver® button to activate the MoneySaver® feature. This cycles the fan with the compressor so that the fan does not run all the time.

To set the timer

NOTE: Set the hour clock before attempting to set timer functions. You can set the timer On/Off a minimum of one hour apart, and a maximum of 23 hours apart.

9TIMER START - PressStart to view the current start time for cooling. Continue pressing theStart button until you arrive at the start time you desire. The start time for cooling will then be set.

10TIMER STOP - Press theStop button. Continue pressing theStop button until you arrive at the stop time you desire. The stop time for cooling will then be set.

11TIMER ON/OFF - Press theOn/off button once to activate (light on) or deactivate (light off) the timer. Once theStart andStop times have been selected, they will remain in memory, and cycle daily until changed.

To adjust temperature

5COOLER - Press theCooler button to raise the temperature setting.

6WARMER - Press theWarmer button to lower the temperature setting.

To adjust fan speed

7FAN SPEED - Press theFan Speed button to see the current setting. Press again to change the fan speed. F1 is the lowest setting (SLEEP SETTING), F2 is low speed (LOW), F3 is medium (MED), and F4 is high (HIGH).

To set the hour clock

8SET HOUR CLOCK - PressSet Hour once to see the current clock setting. Continue pressing the button until you arrive at the current time.

MAKE SURE YOU SET THE A.M. AND P.M. PROPERLY. (NOTE: MINUTES ARE NOT SHOWN ON THE DISPLAY.) A light will appear in the upper left corner of the display when the hour is P.M.

*A Friedrich RC1 wireless remote control can be used to operate all QuietMaster® Programmable models.

NOTE: If the unit is unplugged or the power is interrupted, the HOUR CLOCK must be reset or theTimer On/off functions will not work.

Figure 4

 

 

 

 

 

 

Temperature

 

 

 

6

Cooler

 

Warmer

5

 

 

 

 

2

Cool

 

 

Power

1

 

 

 

 

 

 

 

3

Fan

Fan

 

Money

4

Only

Speed

Saver®

 

 

 

Timer Operation

 

 

7

11

On/O

Start

Stop

Set Hr.

8

 

 

 

 

9

 

 

 

 

10

13

How to operate the Friedrich room air conditioner (XQ models)

To start unit

If your air conditioner is installed and plugged into a proper receptacle, it is ready to go. The first 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 (light on), with constant fan.

2Touch the Mode button once to activate theMoneySaver® (light on).

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 dehumidication. 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:

3Continuing from MoneySaver® mode (light on), touch theMode button once to activate theFAN ONLY feature (light on).

The FAN ONLY setting will circulate air in the room without the compressor coming on.

To adjust temperature

4Use the Mode button to select either theCOOL orMoneySaver® function

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

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

7Press both the andbuttons at the same time to switch the temperature readout 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 to change speed. F1 is the lowest setting (SLEEP SETTING / LOW), F2 isMEDIUM, and F3 isHIGH.

To activate Smart Fan

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

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.

8 9

2 3 4

1

Figure 5

PM

 

 

Cool

 

Fan

Mode

Money Saver®

 

Speed

 

 

 

 

Fan Only

 

 

 

Clock

 

Timer

Set

Start Time

 

 

Hour

Stop Time

 

 

 

Temp/Hour

 

 

 

5 6

13 10 11 12

7

To set the hour clock

10Touch the Set Hour button to see the current setting (clock light comes on). The number that is displayed is the approximate time (hour only). Use the and buttons 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).

To set the timer

NOTE: Set theHOUR CLOCK before attempting to set timer functions.

You can set the START andSTOP times a minimum of one hour apart, and a maximum oftwenty-threehours apart.

11After setting the time, press the Set Hour button once (Start light comes on). Use the and buttons to select the time that the unit willSTART.

12After selecting the START time, press theSet Hour button once more (Stop light comes on). Use the and buttons 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.

Automatic component protection

Your unit is equipped with Automatic Component Protection. To protect the compressor of the unit, there is a three minute start delay if you turn the unit off or if power is interrupted. The fan operation will not be affected. Also, if you switch from Cool mode toFan Only, and switch back toCool mode, there is a three minute delay before the compressor comes back on.

14

How to use the remote control (XQ models)

To start unit

To set the timer

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.

4MoneySaver® - Press theMoneySaver® button to activate the MoneySaver® feature. This feature cycles the fan with the compressor so that the fan does not run all the time.

NOTE: You can set theSTART andSTOP times a minimum of one hour apart, and a maximum of 23 hours apart.

9TIMER START - PressStart to view the current start time for cooling. Continue pressing theStart button until you arrive at the start time you desire. The start time for cooling will then be set.

10TIMER STOP - Press theStop button. Continue pressing theStop button until you arrive at the stop time you desire. The stop time for cooling will then be set.

11TIMER ON / OFF - Press theOn/Off button 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 theOn/Off function will not work.

To adjust temperature setting

5WARMER - Press theWarmer button to raise the temperature setting.

6COOLER - Press theCooler button to lower the temperature setting.

To adjust fan speed

7FAN 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 isMEDIUM,F3 isHIGH, andSF is theSMART FAN setting.

To set the hour clock

8SET HOUR CLOCK - PressSet Hr. 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.

Figure 6

Temperature

6

Cooler

Warmer

5

 

 

 

2

Cool

 

Power

1

 

 

 

 

 

3

Fan

Fan

Money

4

Only

Speed

Saver®

 

 

 

Timer Operation

 

7

11

On/O

Start Stop

Set Hr.

8

 

 

 

9

 

 

 

10

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

15

How to operate the Friedrich room air conditioner

(QuietMaster / Twintemp models)

To start unit

If your air conditioner is installed and plugged into a properly grounded receptacle, it is ready to operate.

Mode control (QuietMaster)

The upper dial (Figure 7) allows you to select cooling at four different speeds, as well as Fan Only (Models SL28 and SL36 only have three cooling speeds.).

Off - to turn the unit off.

High Cool - for quick cooling.

Medium Cool - to maintain a desired temperature.Low Cool - when cooling demand is low.

Sleep Setting - for nighttime use, or when cooling demand is low.Fan Only - to circulate air in the room without the compressor coming on.

The Fan Only setting can also be used with theExhaust air setting to remove stale air or smoke from the room; or it can be used with theFresh Air setting to bring outside air into the room. This is especially useful in the spring and fall when cooling may not be necessary. TheFresh Air andExhaust controls are in the upper air discharge area. The center position of this control is the normal, or closed position, which recirculates air for maximum performance in the cooling mode.

Mode control (Twintemp)

This dial allows you to select cooling or heating at three different speeds,

Figure 7

as well as Fan Only (Figure 8).

Off - to turn the unit off.

 

High Cool orHigh Heat - for quick response.

 

Medium Cool orMedium Heat - to maintain a desired temperature.

 

Low Cool orLow Heat - for nighttime use, or when demand is low.

 

Fan Only - to circulate air in the room without the compressor coming on.

 

The Fan Only setting can also be used with theExhaust air setting to

 

remove stale air or smoke from the room, or it can be used with the Fresh

 

Air setting to bring outside air into the room, especially in the spring and

 

fall when cooling isn’t necessary.

 

The Fresh Air andExhaust controls are in the upper air discharge area.

 

The center position of this control is the normal, or closed position, which

 

recirculates air for maximum performance in the cooling mode.

 

NOTE: You may notice an odor when first activating the heat when the

 

electric heat element comes on. This is due to dust burning off that may

 

have gathered on the coil during the summer. This is normal.

 

Temperature control

The bottom dial on the control panel is the thermostat. Turn it clockwise for cooler temperature and counterclockwise for warmer.

Money Saver® switch

This rocker switch can be depressed to either Yes orNo. In theYes position you will get the most economical operation. Both the fan and compressor will cycle on and off together, maintaining the selected temperature at a more constant level and reducing the humidity more efficiently in the cooling mode. This control will only operate when the unit is in cooling or heating mode. In theNo position, the fan will run constantly as long as the unit is

in the cooling or heating mode.

Figure 8

NOTE: The YS09 is a 115 volt model and does not provide adequate heat

 

below 37°F (3°C). This product is designed for warm climate applications.

 

S P E E D

g

 

Cool

 

Yes

No

Money Saver®

3 min. between restarts

l

d l

HeaCool

Yes

No

Money Saver®

Allow 3 min. between restarts

16

EQ08 models

Function Control

The left knob is a six position control that allows you to select heat or cool in either low speed or high speed. Plus you can select fan only if you wish.

Function Control

The right hand knob is the thermostat - turn it clockwise for cooler, counter-clockwisefor warmer (See Figure 9).

 

MAX

 

HE

High

Fan

Heat

Only

Low

High

Heat

Cool

Low

MA

Cool

COO

Allow! 3 min. between restarts

 

FIGURE 9

PM

 

 

Cool

 

Fan

Mode

Money Saver®

 

Speed

 

 

 

 

Fan Only

 

 

 

Clock

 

Timer

Set

Start Time

 

 

Hour

Stop Time

 

 

 

Temp/Hour

 

 

 

FIGURE 10

TESTING THE ELECTRONIC CONTROL BOARDS FOR QME & XQ MODELS

Checking Room Temperature:

1.Check the room temperature at the electronic control pad by pressing the “FAN SPEED” button and the temperature“UP” buttonatthesametimeonXQ models.

2.Check the room temperature at the electronic control pad by pressing at the same time the “FAN SPEED”

button and the “TEMPbutton onQME models.

Theindoortemperaturewilldisplayfor10seconds.Indoor temperature can be viewed in all modes, including the TEST mode. The display can be changed back to SET temperature by pressing any key, except the ON/OFF button, or after 10 seconds has elapsed.

Activating Test Mode:

Activate test mode by pressing at the same time the “MODE” button and the“TEMP ” button onXQ models. LEDs for Hour, Start, and Stop will blink 1 bps while Test Mode is active.

Activate test mode by pressing at the same time the

“MONEY SAVER” button and the “CHECK FILTER”button on QME models. LED for the Filter Alert will blink 1 bps while Test Mode is active.

Set

Check

Hour

Filter

 

Press to reset

 

 

Money

Fan

Mode

 

Saver®

Only

 

 

 

Temp

 

 

OF/OC

 

 

 

 

1-4

Smart

 

Fan

Speed

Fan

 

 

 

 

 

A/C

A/C

Timer

Timer

Stop

Start

 

 

 

 

FIGURE 11

Test Mode has duration of 90 minutes. Test Mode can be activated under any conditions, including Off. Test Mode is cancelled by pressing the On/Off button, unplugging the unit, or when the 90 minutes is timed out. All settings revert to the factory default settings of Cool, 75 degrees F, Timer and Set Hour features are nonfunctional.

Test Mode overrides the three-minutelockout, all delays for compressor and fan motor start / speed change, and no delay when switching modes.

Test Mode default settings are ON, Money Saver, 60 degrees F, and High fan speed.

17

Activating Error Code Mode: (Submode of Test Mode) Unit must be in Test Mode to enter Error Code Mode

1.Activate Error Code Mode by pressing the “TIMER ON/ OFF” button on XQ models. LED for the“TIMER ON/ OFF” will flash 1 bps while Error Code Mode is active. Pressing the“TEMP/HR button will display 00. Consecutive presses will scroll through all error codes logged. Press the“TEMP/HR button to see the reverse order of all error codes logged. When the end of logged error codes is reached the temperature set point will appear.

Activate Error Code Mode by pressing at the same time the “A/C START” button and the“ON/OFF” button on QME models. LED for the“TIMER ON/OFF” will flash 1 bps while Error Code Mode is active. Pressing the“TEMP button will display 00. Consecutive presses will scroll through all error codes logged. Press the“TEMP button to see the reverse order of all error codes logged. When the end of logged error codes is reached the temperature set point will appear.

IMPORTANT: ErrorCodesareclearedfromthelog by exiting from Error Code Mode. To exit on XQ models, press Timer On/Off button. To exit QME models, press A/C Start and On/Off buttons. Or unplug unit to exit Error Code Mode. Plug unit in after 5 seconds to resume normal operation of unit.

TESTING THE ELECTRONIC CONTROL ERROR CODE LISTINGS

E1 SHORT CYCLE SITUATION: Defined as (compressor powered on before the three minute time delay ten times in one hour. Investigate and correct short cycling problem.

E2 KEYBOARD STUCK ERROR: If key button(s) are pressed continuously for twenty seconds or more. If MODE key is stuck, unit will default to cool. Exit Error Code Mode to see if error “E2” is no longer displayed and unit is functioning. Replace board if “E2” still displays after exiting

Error Code Mode.

E3 FROST PROBE OPEN: Normal operation is allowed. Ohm frost probe. Replace probe if ohm value not read. If ohm value is present replace board.

E4 FROST PROBE SHORT: Normal operation allowed. Replace probe.

E5 INDOOR PROBE OPEN: Control assumes indoor ambient temperature is 90 degree F and unit will operate. Ohm indoor probe. Replace probe if ohm value not read.

E6 INDOOR PROBE SHORT: Control assumes ambient temperature is 90 degree F and unit will operate. Replace probe.

NOTE: All Error Code displays for Frost & Indoor Probe will allow unit to operate. Unit may or will ice up if faulty components not replaced.

FROST PROBE SENSOR: disables compressor at 35 degrees F.

INDOOR PROBE SENSOR: Control range is 60 degrees F to 90 degrees F +/- 2 degrees F.

Indoor temperature will be displayed by pressing: (QME units) The Fan Speedbutton and the Temperature button.

(XQ units) The Fan Speedbutton and the “TEMP “ button.

The indoor temperature will be displayed for 10 seconds. The display will change back to the Set Point temperature by pressing any key button except for the On/Off button. The indoor temperature can be viewed in all modes, including test mode.

Check Filter: TheCheck Filter indicator turns on after the fan motor has been operating for 250 hours. TheCheck Filter indicator is reset by pressing theCheck Filter button one time only. Power failures will not reset the 250 hour timer. All time elapsed is stored in memory and resumes counting after power is restored.

Keep Alive: The electronic control has a memory to retain all functions and status as set up by the user in the event of a power failure. 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.

18

TESTING THE ROTARY CONTROL SWITCHES

(Heat Pump & Electric Heat Models) (See Figure 12)

An e ight position control switch is used t o regulate the operation of thefan motor and compressor. The compressor can be operated with the fan operating at low, medium or high speed in the cooling or heating mode. The fan motor can also be operated independently on medium speed. See switch section as indicated on decorative control panel.

NOTE: Heat pump models with electric heat - in the heat position, heating element only will be energized when outdoor temperature is below the operating range of the heat pump.

Figure 12

System Control Panel

Heat Pump & Electric Heat Models

(YS, ES, YM, EM, YL & EL)

l

d l

HeaCool

Yes

No

Money Saver®

Allow 3 min. between restarts

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 (See Figure 13) Disconnect leads from controlswitch. Turn control to position being tested. There must be continuity as follows:

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

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

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

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

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

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

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

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

Figure 13

System Control Switch (Heat Pump / Electric Heat Models

KS, KM, SL Models (See Figure 14)

A six position control switchis used to regulate theoperation of the fan motor and compressor. The compressor can be operated with the fan operating at l ow, medium o r high speed. The fan motor can also be operated independently on m edium speed. See switch s ection a s indicated on decorative control panel.

Figure 14

System Control Panel (KS, KM, SL)

S P E E D

 

Cool

 

Yes

No

Money Saver®

3 min. between restarts

19

SYSTEM CONTROL SWITCH - TEST (See Figure 15) Disconnect leads from control switch. There must be continuity as follows:

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

2.“Lo Cool” Position - between terminals “L1” and “C,” “LO” and “MS.”

3.“Med Cool” Position - between terminals “L1” and “C,” “M” and “MS.”

4.“Hi Cool” Position - between terminals “L1” and “C,” “H” and “MS.”

5.“Fan Only” Position - between terminals “L1” and “2.”

Figure 15

System Control Switch

“EQ08” SYSTEM CONTROL SWITCH – TEST

(See Figure 16)

Turn knob to phase of switch to be tested. There must be continuity as follows:

1.“Fan Only” Position – between terminals “MS” and “H”

2.“Hi Cool” Position – between terminals “L1” and “C” and “MS” and “H”

3.“Low Cool” Position – between terminals “L1” and “C” and “MS” and “LO”

4.“Low Heat” Position – between terminals “L2” and “2” and “MS” and “LO”

5.“Hi Heat” Position – between terminals “L2” and “2” and “MS” and “H”

Figure 16

 

L1

 

 

 

 

 

System Control Switch

 

 

 

 

 

(EQ Models)

B1

 

MS

L2

 

 

H

C

 

 

LO

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTIONAL COMPONENT DEFINITIONS

MECHANICAL COMPONENTS

Bellows condensate 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 58°F.

Vent door Allows introduction of fresh air into the room and/or exhausts stale room air outside (on select models.)

Plenum assembly Diffuser with directional louvers used to direct the conditioned airflow.

Blower wheel 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.

ELECTRICAL COMPONENTS

Thermostat Used to maintain the specified room side comfort level

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.

Defrost thermostat (Heatpumps only)A dual purpose control that acts as an outdoor thermostat and defrost control.

Smart Fan Automatically adjusts the fan speed to maintain the desired room temp.

MoneySaver® switch When engaged, it sends the power supply to the fan motor through the thermostat, which allows for acycle-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, available in 3.3, 4.0 or 5.2 kW on select TwinTemp® models.

Heat anticipator Used to provide better thermostat and room air temperature control.

HERMETIC COMPONENTS

Compressor Motorized device used to compress refrigerant through the sealed system.

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

Check valve Apressure-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.)

20

COMPONENTS TESTING

THERMOSTAT (“EQ08” Models) (See Figure 17)

This thermostat is single pole-doublethrow, cross ambient with a range of 60° to 92°F and a differential of ±2°F. Terminal “2” is common.

Figure 17

Thermostat

(EQ Model)

WARNING

ELECTRIC SHOCK HAZARD

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

TEST:

1.Remove leads from thermostat.

2.Turn thermostat knob clockwise to its coldest position.

3.Test for continuity between the two terminals. Contacts should be closed.

4.Turn thermostat knob counterclockwise to its warmest position.

5.Test for continuity - contacts should be open.

NOTE: The thermostat must be within the temperature range listed to open and close.

To maintain the comfort level desired, a cross ambient type thermostat is used. The thermostat has a range from 60° ±2°F to 92° ±3°F. The thermostat bulb is positioned in front of the evaporator coil to sense the return air temperature. Thermostat malfunction or erratic operation is covered in the troubleshooting section of this manual.

THERMOSTAT - Models ES, YS, EM, YM, EL, YL

A cross ambient thermostat is used on all heat pump and electric heat units. In addition to cycling the unit in a heating or cooling operation, the thermostat will terminate the cooling cycle in the event ice forms on the evaporator coil, in this case the thermostat functions as a de-icecontrol. A resistor (anticipator) is positioned within a plastic block to supply a small amount of heat to the bulb area to prevent long “off cycles” in the“Cool-FanAuto” (MoneySaver) position. A current feedback through the fan motor windings during “off cycle” completes the circuit to the resistor.

In the heating cycle, the heat anticipator is energized to supply a small amount of heat during the “on” cycle. This will open the contacts in the thermostat prematurely to maintain a closer differential between the “cut in” and “cut out” temperature. The heat anticipator is energized in the heating mode regardless of whether fan is placed in the automatic (MoneySaver) or constant run position.

RANGE:

Thermostat Properties

 

60°F (±2°) to 92°F (±2°)

TEST:

Cooling/Heating Models: Remove wires from thermostat and check continuity between terminal “2” (common) and “3” for cooling. Check between terminals “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. Refer to the troubleshooting section in this manual for additional information on thermostat testing.

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. Thermostat bulb must be straight to insure proper performance.

Figure 18

Thermostat

THERMOSTAT BULB LOCATION

The position of the bulb is important in order for the thermostat to function properly. The bulb of the thermostat should be located approximately 45° to a maximum of 60° from horizontal. Also, do not allow the thermostat bulb to touch the evaporator coil. (See Figures 17 and 18)

Figure 19

Thermostat Bulb Location

(EQ Model)

Thermostat sensor holder 020 to be positioned between the 4th and 5th and 6th and 7th rows of tubes from the bottom of the coil at dimension shown

21

COMPONENTS TESTING (Continued)

RESISTOR: Heat Anticipator (See Figure 20)

Failure of the resistor will cause prolonged “off” and “on” cycles of the unit. When replacing a resistor, be sure and use the exact replacement. Resistor ratings are as follows:

115 Volt - 5,000 ohms 3 watt

230 Volt - 20,000 ohms 3 watt

Figure 20

Resistor

DEFROST THERMOSTAT (Heat Pump Models Only)

(See Figure 21)

WARNING

ELECTRIC SHOCK HAZARD

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

This thermostat is single pole - double throw with contacts between terminals “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 “1” make, power is supplied to the heater element.

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

When the sensing bulb, attached to the outdoor 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°, the unit will operate in electric heat mode continuously until the outdoor coil temperature rises above 43°.

The fan motor will not turn off when defrost occurs, and the 4-wayvalve will not reverse.

Figure 21

Defrost Thermostat

(Heat Pump Models)

DEFROST BULB LOCATION (Heat Pump Models Only) (See Figure 22)

The defrost control bulb must be mounted securely and in the correct location to operate properly.

Figure 22

Defrost Thermostat Bulb

Location (All Heat Pump Models)

Slide the end of the thermostat defrost under the retainer shown

22

COMPONENTS TESTING (Continued)

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.

Figure 23

Fan Motor

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

FIGURE 24

23

COMPONENTS TESTING (Continued)

HEATING ELEMENT (See Figure 25)

All heat pumps and electric heat models are equipped with a heating element with the exception of models starting with YS09. The “YS” and “ES” models are equipped with a 3.3 KW element. The “YM” and “EM” models are equipped with a 4.0 KW element. The “YL” and “EL” models are equipped with a 5.2 KW element. The EQ08 has a 1.15 KW element.

Figure 25

Heating Element

The heating element contains a fuse link and a heater limit switch. The fuse link is in series with the power supply and will open and interrupt the power when the temperature reaches 199°F or a short circuit occurs in the heating element. Once the fuse link separates, a new fuse link must be installed.

NOTE: Always replace with the exact replacement.

The heater element has a high limit control. This control is a bimetal thermostat mounted in the top of the heating element.

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

The control is designed to open at 110°F ±6°F. Test continuity below 110°F and for open above 110°F.

HEATING ELEMENT (Heat Pump Models)

The heating element for the “Y” model is energized by an outdoor thermostat. The outdoor defrost thermostat is adjusted at a predetermined temperature to bring on the heating element and turn off the compressor. The room thermostat will then control the cycling of the element when the selected indoor temperature is reached.

TESTING THE HEATING ELEMENT

WARNING

ELECTRIC SHOCK HAZARD

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

Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed. A cold resistance reading of approximately 10.11 ohms for the 1.15 KW heater, 14.5 ohms for the 3.3 KW heater, 11.9 ohms for the 4.0 KW heater and 9.15 ohms for the 5.2 KW heater should be registered.

DRAIN PAN VALVE

(See Figure 26)

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.

Figure 26

Bellows Assembly

Drain Pan Valve

DEFROST THERMOSTAT OPERATION HEAT PUMP WITH ELECTRIC HEAT: YS, YM AND YL MODELS

This control is 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 electric heating element until the coil temperature reaches above 43°, then the electric heater will shut off and the unit will resume operating in the reverse cycle mode.

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

The fan motor will not turn off when defrost occurs, and the 4-wayvalve will not reverse.

24

ELECTRONIC CONTROL SEQUENCE OF OPERATION QME PROGRAMMABLEAND XQ MODELS

Mode Control

The mode control pad(s) allow the selection of the operating modes of the unit.

There is a two second delay before the mode activates its appropriate relay.

OPERATING SEQUENCE / CHARACTERISTICS AND FEATURES

Compressor Operation

The run state of the compressor is determined by the difference between the indoor ambient temperature and the set temperature. See specific mode of operation for details.

Compressor Time Delay: 180 seconds

This feature is initiated every time the compressor is deenergized, either due to:

(1)satisfying the temperature set point

(2)changing mode to fan only

(3)a power interruption or

(4)turning the unit off

The compressor is also time delayed for 3 minutes when the control is first plugged in or power is restored after failure. When the compressor cycles off as a result of satisfying the “load”, the time delay is typically timed out during the off cycle. Compressor time delay is bypassed by “Test Mode”.

Return Air Temperature Sensor

The control range is 60°F to 90°F +/- 2.0°F.

Frost Protection Sensor

Temperature settings:

Disable the compressor when sensing 30 +/- 3°F for 2 min. continuously.

Enable compressor @ 55 +/- 5°F.

The fan should not be affected by the Frost Protection. It should continue to function normally if freeze protection is called for.

COOL Mode for SS, SM and XQ Models

When in the COOL mode, the control will turn on the compressorwhentheindoortemperatureis1.5°F abovethe set point and turn off the compressor when the ambient gets below the set point by1.5°F. The fan will run continuously.

MONEY SAVER Mode

When in MONEY SAVER mode, the system will be turned on when the indoor temperature gets above the set point by0.75°F and turns off when the indoor temperature gets below the set point by0.75°F. The fan will turn on5 seconds before the compressor and turn off5 seconds after the compressor stops. If the compressor is delayed the fan will continue to run while the compressor restarts. If the

thermostat remains satisfied for more than approximately 9 minutes, the fan will turn on for a period of 90 seconds for air sampling. Operation in MONEY SAVER mode will light both theMONEY SAVER andCOOL indicators.

FAN ONLY Mode

When in the FAN ONLY mode, the compressor will not operate. The fan will run continuously at theuser-selectedspeed (see “Fan Speed Set” below). Smart Fan is not available inFAN ONLY Mode.

Fan Speed Set

SS/SM fan speed is changed by pressing SPEED 1-4pad and scrolling through F1, F2, F3, and F4 in the digital display.

XQ fan speed is changed by pressing FAN SPEED pad and scrolling through F1, F2, F3 and SF (Smart Fan) in the digital display.

Therewillbea2seconddelaybeforethefanspeedchanges to prevent unnecessary switching of the relays during fan speed selection.

SMART FAN

On the SS/SM models, smart fan is activated by pressing the SMART FAN button. On the XQ model, smart fan is activated by pressing theFAN SPEED button and scrolling through speeds until“SF” appears in the digital display. Using the remote control, Smart Fan is selected by the fourth push of Fan Speed button.

Smart fan changes fan speeds based on the temperature differential between the ambient and set temperatures.

25

REFRIGERATION 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 RAC 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

26

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

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.

27

Method Of Charging / Repairs

The acceptable method for charging the RAC 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 200 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.

28

 

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

 

 

 

 

 

 

 

29

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.

Aquick 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.

30

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).

31

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.

32

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

Reversing Valve in Cooling Mode

33

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.

34

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.

35

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.

36

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.

37

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.

38

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.

39

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.

Fresh Air

Compressor

Capillary Tube

Liquid Filter Driers

Reversing Valve

Condenser Coil

(some models)

 

Front Cover

Discharge Air

 

System Switches

Outdoor Grille

 

Evaporator Coil

Sleeve

 

Return Air Grille/Filter

 

Blower Wheel

 

Blower Motor

Basepan Condenser Fan Blade

40

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

 

 

41

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

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

 

 

 

42

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

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

43

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

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

44

HEAT / COOL ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem

Possible Cause

Action

 

Heat anticipator (resistor) shorted (on applicable

Disconnect power to unit. Remove resistor from

 

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

 

models)

 

Feel resistor for heat. If not heat, replace resistor

Room temperature

 

 

 

uneven

Wide differential - partial loss of t-statbulb charge

Replace t-stat& check

(Heating cycle)

 

 

 

 

Refer to appropriate wiring diagram. Resistor is

 

Incorrect wiring

energized during "ON" cycle of compressor or

 

 

fan.

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to appropriate wiring diagram

 

Defrost control timer motor not advancing

Check for voltage at "TM" & "TM1" on timer. If no

 

(applicable models)

voltage, replace control

 

Defrost control out of calibration (applicable

If outside coil temperature is 25F or below, &

 

preselected time limit has elapsed, replace

 

models)

Unit will not defrost

defrost control

 

 

 

If contacts remain closed between terminals "2"

 

Defrost control contacts stuck

& "3" of the defrost control after preselected time

 

 

interval has passed, replace control

 

Defrost control bulb removed from or not making

Reinstall & be assured that good bulb to coil

 

good coil contact

contact is made

Problem

Possible Cause

Action

 

Exhaust or fresh air door open

Check if operating properly. Instruct customer on

 

proper use of control

 

 

 

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,

 

 

Does not heat

 

recommend additional unit or larger one

 

 

adequately

 

T-statshould close at 38°F. Check continuity of

 

Outdoor t-statopen (applicable models)

control. If temperature is below 38°F, replace

 

 

control

 

Heater hi-limitcontrol cycling on & off

Check for adequate fan air across heater. Check

 

control for open at 160°F & close at 150°F

 

 

 

Shorted supplementary heater

Ohmmeter check, approx. 32-35ohms

 

Incorrect wiring

Check applicable wiring diagram

45

HEAT / COOL ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to applicable wiring diagram

 

Defective solenoid coil

Check for continuity of coil

Unit cools when

 

Block condenser coil & switch unit to cooling.

 

Allow pressure to build up in system, then

heat is called for

Reversing valve fails to shift

switch to heating. If valve fails to shift, replace

 

 

 

 

valve.

 

Inoperative system switch

Check for continuity of system switch

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

Cooling adequate,

Check valve leaking internally

cooling. Check temperature rise across

but heating

coil. Refer to specification sheet for correct

 

insufficient

 

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.

 

 

TROUBLESHOOTING CHART — HEATPUMP

REFRIGERANT SYSTEM DIAGNOSIS - COOLING CYCLE

LOW SUCTION PRESSURE

 

HIGH SUCTION PRESSURE

 

LOW HEAD PRESSURE

 

HIGH HEAD PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low Load Conditions

High Load Conditions

Low Load Conditions

High Load Conditions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low Air Flow Across

 

High Air Flow Across

 

Refrigerant System

 

Low Air Flow Across

Indoor Coil

 

Indoor Coil

 

Restriction

 

Outdoor Coil

 

 

 

 

 

 

 

 

 

 

 

Refrigerant System

 

Reversing Valve not

 

Reversing

Valve not

 

Overcharged

Restriction

 

Fully Seated

 

Fully Seated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Undercharged

 

Overcharged

 

Undercharged

 

Noncondensables (air)

 

 

 

 

 

 

in System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moisture in System

 

Defective Compressor

 

Defective Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

46

TROUBLESHOOTING CHART — HEATPUMP

REFRIGERANT SYSTEM DIAGNOSIS - HEATING CYCLE

LOW SUCTION PRESSURE

 

HIGH SUCTION PRESSURE

 

LOW HEAD PRESSURE

 

HIGH HEAD PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low Airflow

 

Outdoor Ambient Too High

 

Refrigerant System

 

Outdoor Ambient Too High

Across Outdoor Coil

 

for Operation in Heating

 

Restriction

 

For Operation In Heating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refrigerant System

 

Reversing Valve not

 

Reversing Valve not

 

Low Airflow Across

Restriction

 

Fully Seated

 

Fully Seated

 

Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Undercharged

 

Overcharged

 

Undercharged

 

Overcharged

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moisture in System

 

Defective Compressor

 

Defective Compressor

 

Noncondensables (air)

 

 

 

in System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRICAL TROUBLESHOOTING CHART — HEAT PUMP

HEAT PUMP

SYSTEM COOLS WHEN

HEATING IS DESIRED.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is Line Voltage

 

 

 

Is the Selector Switch

Present at the Solenoid

NO

 

Set for Heat?

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the Solenoid Coil Good?

 

 

 

Replace the Solenoid Coil

NO

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reversing Valve Stuck

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace the Reversing Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

47

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)

 

 

 

 

 

 

 

 

 

 

48

ELECTRONIC CONTROL

COOL ONLY MODELS:

XQ05L10A-CXQ06L10A-CXQ08L10A-B,A-E

XQ10L10A-CXQ12L10A-B,A-C

49

ELECTRONIC CONTROL

COOL ONLY MODELS:

SS08L10-E,-F,-GSS10L10-D,-ESS12L10-E,-FSS14L10-D,-ESS12L30-E,-FSS16L30-D,-ESM18L30A-D,A-ESM21L30-E,-FSM24L30-C,-D

50

ELECTROMECHANICAL CONTROL

COOL ONLY MODELS:

KS12L10-E,-FKS15L10-C,-DKM18L30-C,-DKM24L30-C,-D

51

ELECTROMECHANICAL CONTROL

COOL ONLY MODELS:

SL28L30-D,-ESL36L30A-D,A-E

52

ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODEL: EQ08L11A-B,A-E

53

ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODELS: ES12L33-D,-EES16L33-C,-DEM18L34-CEM24L34-B

54

ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODELS: EL36L35A-D,A-E

55

ELECTROMECHANICAL CONTROL HEAT PUMP ONLY MODELS:

YS09L10-F,-G

56

ELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS:

YS13L33-D,-EYM18L34-D,-E

57

ELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS:

YL24L35-E,-F

58

INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE

FORM FOR ROOM AIR CONDITIONERS

(AHAM PUB. NO. RAC-1)

A.This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specifi c conditions of inside temperature and humidity.

B.The form is based on an outside design temperature of 95°F dry bulb and 75°F wet bulb. It can be used for areas in the continental United States having other outside design temperatures by applying a correction factor for the particular locality as determined from the map.

C.The form includes “day” factors for calculating cooling loads in rooms where daytime comfort is desired (such as living rooms, offi ces, etc.)

D.The numbers of the following paragraphs refer to the corresponding numbered item on the form:

1.Multiply the square feet of window area for each exposure by the applicable factor. The window area is the area of the wall opening in which the window is installed. For windows shaded by inside shades or venetian blinds, use the factor for “Inside Shades.” For windows shaded by outside awnings or by both outside awnings and inside shades (or venetian blinds), use the factor for “Outside Awnings.” “Single Glass” includes all types of single thickness windows, and “Double Glass” includes sealed airspace types, storm windows, and glass block. Only one number should be entered in the right hand column for Item 1, and this number should represent only the exposure with the largest load.

2.Multiply the total square feet of all windows in the room by the applicable factor.

3a. Multiply the total length (linear feet) of all walls exposed to the outside by the applicable factor. Doors should be considered as being part of the wall. Outside walls facing due north should be calculated separately from outside walls facing other directions. Walls which are permanently shaded by adjacent structures should be considered “North Exposure.” Do not consider trees and shrubbery as providing permanent shading. An uninsulated frame wall or a masonry wall 8 inches or less in thickness is considered “Light Construction.” An insulated wall or masonry wall over 8 inches in thickness is considered “Heavy Construction.”

3b. Multiply the total length (linear feet) of all inside walls between the space to be conditioned and any unconditioned spaces by the given factor. Do not include inside walls which separate other air conditioned rooms.

4.Multiply the total square feet of roof or ceiling area by the factor given for the type of construction most nearly describing the particular application (use one line only.)

5.Multiply the total square feet of fl oor area by the factor given. Disregard this item if the fl oor is directly on the ground or over a basement.

6.Multiply the number of people who normally occupy the space to be air conditioned by the factor given. Use a minimum of 2 people.

7.Determine the total number of watts for light and electrical equipment, except the air conditioner itself, that will be in use when the room air conditioning is operating. Multiply the total wattage by the factor given.

8.Multiply the total width (linear feet) of any doors or arches which are continually open to an unconditioned space by the applicable factor.

NOTE: Where the width of the doors or arches is more than 5 feet, the actual load may exceed the calculated value. In such cases, both adjoining rooms should be considered as a single large room, and the room air conditioner unit or units should be selected according to a calculation made on this new basis.

9.Total the loads estimated for the foregoing 8 items.

10.Multiply the subtotal obtained in item 9 by the proper correction factor, selected from the map, for the particular locality. The result is the total estimated design cooling load in BTU per hour.

E.For best results, a room air conditioner unit or units having a cooling capacity rating (determined in accordance with the NEMA Standards Publication for Room Air Conditioners, CN 1-1960)as close as possible to the estimated load should be selected. In general, a greatly oversized unit which would operate intermittently will be much less satisfactory than one which is slightly undersized and which would operate more nearly continuously.

F.Intermittent loads such as kitchen and laundry equipment are not included in this form.

4

59

COOLING LOAD ESTIMATE FORM

HEAT GAIN FROM

 

QUANTITY

FACTORS

 

 

BTU/Hr.

 

DAY

 

 

 

 

 

 

 

 

 

(Quantity x Factor)

1.

WINDOWS: Heat gain from the sun.

 

 

No

Inside

Outside

(Area

 

 

 

Shades*

Shades*

Awnings* X Factor)

 

Northeast

*

These factors are for single glass

 

____sq. ft.

60

25

20 ____

Use

____

 

East

 

____sq. ft.

80

40

25 ____

only

____

 

 

only. For glass block, multiply the

 

 

Southeast

 

 

____sq. ft.

75

30

20 ____

the

____

 

 

above factors by 0.5; for double

 

 

South

 

 

____sq. ft.

75

35

20 ____

largest

____

 

 

glass or storm windows, multiply the

 

Southwest

 

above factors by 0.8.

 

____sq. ft.

110

45

30 ____

load.

____

 

West

 

 

 

____sq. ft.

150

65

45 ____

Use

____

 

Northwest

 

 

 

____sq. ft.

120

50

35 ____

only

____

 

North

 

 

 

____sq. ft.

0

0

0 ____

one.

____

 

 

 

 

 

 

 

 

 

 

2.

WINDOWS: Heat by conduction

 

 

 

 

 

 

 

 

 

(Total of all windows.)

 

 

 

 

 

 

 

_____

 

Single glass

 

 

____sq. ft.

 

14

 

 

 

 

Double glass or glass block

 

____sq. ft.

 

7

 

 

 

_____

 

 

 

 

 

 

 

3.

WALLS: (Based on linear feet of wall)

 

Light Construction

Heavy Construction

 

 

a. Outside walls

 

 

 

 

 

 

 

_____

 

North Exposure

 

____ ft.

30

 

20

 

 

Other than North exposure

 

____ ft.

60

 

30

 

_____

 

b. Inside Walls (between conditioned and

 

 

 

 

 

 

 

_____

 

unconditioned spaces only.)

 

____sq. ft.

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

ROOF OR CEILING: (Use one only)

 

 

 

 

 

 

 

_____

 

a. Roof, uninsulated

 

____sq. ft.

 

19

 

 

 

 

b. Roof, 1 inch or more insulation

 

____sq. ft.

 

8

 

 

 

_____

 

c. Ceiling, occupied space above

 

____sq. ft.

 

3

 

 

 

_____

 

d. Ceiling, insulated, with attic space above

 

____sq. ft.

 

5

 

 

 

_____

 

e. Ceiling, uninsulated, with attic space above

 

____sq. ft.

 

12

 

 

 

_____

 

 

 

 

 

 

 

 

 

5.

Floor: (Disregard if floor is directly on ground or

____sq. ft.

 

3

 

 

 

_____

 

over a basement.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6.

NUMBER OF PEOPLE

 

____

 

600

 

 

 

_____

 

 

 

 

 

 

 

 

 

7.

LIGHTS AND ELECTRICAL EQUIPMENT IN USE

____watts

 

3

 

 

 

_____

 

 

 

 

 

 

 

 

 

 

8.

DOORS AND ARCHES CONTINUOUSLY

 

 

 

 

 

 

 

_____

 

OPENED TO UNCONDITIONED SPACE: (TOTAL

____ft.

 

300

 

 

 

 

LINEAR FEET OF WIDTH.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.

SUBTOTAL

 

 

*****

 

*****

 

 

 

_____

 

 

 

 

 

 

 

 

10. TOTAL COOLING LOAD (BTU per hour to be used

 

 

 

 

 

 

 

 

for selection of room air conditioner(s).)

____ Total in Item 9 X ____

(Factor from Map) =

____

 

 

 

 

 

 

 

 

 

 

 

 

5

60

HEAT LOAD FORM

The heat load form on the following page may be used by servicingpersonneltodeterminetheheatlossofaconditioned space and the ambient winter design temperatures in which the unit will heat the calculated space.

The upper half of the form is for computing the heat loss of the space to be conditioned. It is necessary only to insert the proper measurements on the lines provided and multiply by the given factors, then add this result for the total heat loss in BTU/Hr./°F.

The BTU/Hr. per °F temperature difference is the 70°F inside winter designed temperature minus the lowest outdoor ambient winter temperature of the area where the unit is installed. This temperature difference is used as the multiplier when calculating the heat loss.

The graph shows the following:

Left Hand Scale

Unit capacity BTU/Hr. or heat loss

 

BTU/Hr.

Bottom Scale

Outdoor ambient temperature, base

 

point.

Heat Pump Model

BTU/Hr. capacity heat pump will

 

deliver at outdoor temperatures.

Balance Point

Maximum BTU/Hr. heat pump

 

will deliver at indicated ambient

 

temperature.

Following is an example using the heat load form:

A space to be conditioned is part of a house geographically located in an area where the lowest outdoor ambient winter temperature is 40°F. The calculated heat loss is 184 BTU/ Hr./°F.

Subtract 40°F (lowest outdoor ambient temperature for the geographical location) from 70°F (inside design temperature of the unit) for a difference of 30°F. Multiply 184 by 30 for a 5500 BTU/Hr. total heat loss for the calculated space.

On the graph, plot the base point (70°) and a point on the 40°F line where it intersects with the 5500 BTU/Hr. line on the left scale. Draw a straight line from the base point 70 through the point plotted at 40°F. This is the total heat loss line.

Knowing that we have a 5500 BTU/Hr. heat loss, and we expect that our heat pump will maintain a 70°F inside temperature at 40°F outdoor ambient, we plot the selected unit capacity BTU/Hr. of the unit between 35° and 60° on the graph and draw a straight line between these points. Where the total heat loss line and the unit capacity line intersect, read down to the outdoor ambient temperature scale and find that this unit will deliver the required BTU/Hr. capacity to approximately 30°F.

6

61

HEATING LOAD FORM

FRIEDRICH ROOM UNIT HEAT PUMPS

WALLS: (Linear Feet)

BTU/HR PER

°F TEMP. DIFFERENCE

2” Insulation

Lin. Ft. x 1.6

Average

Lin. Ft. x 2.6

WINDOWS & DOORS (Area, sq. ft.)

 

Single Glass:

Sq. Ft. x 1.13

Double Glass:

Sq. Ft. x 0.61

INFILTRATION - WINDOWS & DOORS: AVG.

Lin. Ft. x 1.0

Loose

Lin. Ft. x 2.0

CEILING: (Area, Sq. Ft.)

 

Insulated (6”)

Sq. Ft. x 0.07

Insulated (2”)

Sq. Ft. x 0.10

Built-upRoof (2” insulated

Sq. Ft. x 0.10

Built-upRoof (1/2” insulated)

Sq. Ft. x 0.20

No Insulation

Sq. Ft. x 0.33

FLOOR: (Area, Sq. Ft.)

 

Above Vented Crawl space

 

Insulated (1:)

Sq. Ft. x 0.20

Uninsulated

Sq. Ft. x 0.50

* Slab on Ground

Lin. Ft. x 1.70

1” Perimeter insulation

Lin. Ft. x 1.00

* Based on Linear Feet of outside wall

TOTAL HEAT LOSS PER °F BTU/HR/°F

Multiply total BTU/HR/°F X 30 and plot on the graph below at 40°F. Draw a straight line from the 70 base point thru the point plotted at 40°F. The intersection of this heat loss line with the unit capacity line represents the winter design heating load.

7

62

Friedrich Air Conditioning Company

P.O. Box 1540

San Antonio, TX 78295

210.357.4400

www.friedrich.com

ROOM AIR CONDITIONERS

LIMITED WARRANTY

FIRST YEAR

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

SECOND THROUGH FIFTH YEAR

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

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

1.Air filters or fuses.

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

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

OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service 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)

63

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. RAC-ServMan (04-09)