Friedrich H)A18K34L User Manual

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S e r v i c e M a n u a l – R 4 1 0 A M o d e l s

A Series (Electronic Controls)

Single Package Vertical Air Conditioning System

L Suffix Models

V(E, H)A09K25L-*

V(E, H)A09K34L-*

V(E, H)A09K50L-*

V(E, H)A12K25L-*

V(E, H)A12K34L-*

V(E, H)A12K50L-*

V(E, H)A18K25L-*

V(E, H)A18K34L-*

V(E, H)A18K25L-*

V(E, H)A24K25L-*

V(E, H)A24K34L-*

V(E, H)A24K50L-*

V(E, H)A24K75L-*

V(E, H)A24K10L-*

 

VPK-ServMan-L(1-10)

*Last Digit May Vary

INTRODUCTION

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

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

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

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

(See Unit Identification.)

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)357-4400·1-800-541-6645· FAX (210)357-4490www.friedrich.com

Printed in the U.S.A.

Table of Contents

Important Safety Information ...........................................

2-4

Introduction .........................................................................

4

Vert-I-PakModel Number Identification Guide ...................

5

Serial Number Identification Guide ....................................

5

Chassis Specifications .......................................................

6

Extended Cooling Performance .........................................

7

Electrical Requirements .....................................................

8

Remote Thermostat and Low Voltage Control ..............

9-10

V-PAKElectronic Control Board Features ........................

11

Electronic Control Configuration .......................................

12

Electronic Control Error Code

 

Diagnostics/Test Mode .................................................

12-13

Electronic Control Features ..............................................

14

Checking External Static Pressure ...................................

15

Checking Approximate Airflow ..........................................

16

Airflow Charts ....................................................................

16

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

17-18

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

19

Service .............................................................................

20

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

21

Refrigerant Charging ........................................................

21

Method Of Charging .........................................................

22

Undercharged Refrigerant Systems ............................

22-23

Overcharged Refrigerant Systems ...................................

23

Restricted Refrigerant Systems .......................................

23

Capillary Tube Systems/Check Valve ..........................

24

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

25

Testing Coil ..................................................................

25

Checking Reversing Valves ....................................

25-26

Reversing Valve

 

Touch Testing Heating/Cooling Cycle .........................

26

Procedure For Changing Reversing Valve .............

26-27

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

27

Locked Rotor Voltage Test ..........................................

27

Single Phase Connections .........................................

27

Determine Locked Rotor Voltage ...............................

27

Locked Rotor Amperage Test ......................................

27

Single Phase Running & Locked Rotor Amperage .....

27

Checking the Overload ...........................................

27-28

External Overload ........................................................

28

Compressor Single Phase Resistance Test ................

28

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

29-30

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

30

9-18Electrical Troubleshooting Chart – Cooling .........

31

2-TonElectrical Troubleshooting Chart – Cooling .......

32

Electrical Troubleshooting Chart – Heat Pump ...........

33

Refrigerant System Diagnosis – Cooling ....................

34

Refrigerant System Diagnosis – Heating ....................

34

Electrical and Thermostat Wiring Diagrams ...........

35-40

Technical Service Data ................................................

41

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

 

Model Identification Guide

 

 

 

 

 

 

 

 

 

 

 

 

MODEL NUMBER

 

V

E

A

24

K

50

RT

L

 

SERIES

 

 

 

 

 

 

 

 

 

ENGINEERING CODE

V=Vertical Series

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E=Cooling with or without electric heat

 

 

 

 

 

 

OPTIONS

H=Heat Pump

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RT = Standard Remote Operation

DESIGN SERIES

 

 

 

 

 

 

 

 

 

SP = Seacoast Protected

A = 32" and 47" Cabinet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMINAL CAPACITY

 

 

 

 

 

 

 

 

 

ELECTRIC HEATER SIZE

A-Series(Btu/h)

 

 

 

 

 

 

 

 

 

A-Series

09 = 9,000

 

 

 

 

 

 

 

 

 

00 = No electric heat

12 = 12,000

 

 

 

 

 

 

 

 

 

25 = 2.5 KW

18 = 18,000

 

 

 

 

 

 

 

 

 

34 = 3.4 KW

24 = 24,000

 

 

 

 

 

 

 

 

 

50 = 5.0 KW

 

 

 

 

 

 

 

 

 

 

75 = 7.5 KW

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10 = 10 KW

K = 208/230V-1Ph-60Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VPAK Serial Number Identification Guide

SERIAL NUMBER

 

A

K

A

N

00001

YEAR MANUFACTURED

 

 

 

 

PRODUCTION RUN NUMBER

LJ = 2009

AE = 2015

 

 

 

 

 

AK = 2010

AF = 2016

 

 

 

 

PRODUCT LINE

AA = 2011

AG = 2017

 

 

 

 

AB = 2012

AH = 2018

 

 

 

 

N = VPAK

AC = 2013

AJ = 2019

 

 

 

 

 

AD = 2014

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MONTH MANUFACTURED

 

 

 

 

 

A = Jan

D = Apr

G = Jul

K = Oct

 

 

 

B = Feb

E = May

H = Aug

L = Nov

 

 

 

C = Mar

F = Jun

J = Sep

M = Dec

 

 

 

5

Chassis Specifications

Model 2010

VEA09K

VEA12K

VEA18K

VEA24K

COOLING DATA

 

 

 

 

COOLING BTUh

9400/9000

11500/11200

17000/16500

23000/22700

POWER (W)

959

1173

1888

2421

EER

9.8/9.8

9.8/9.8

9.0/9.0

9.5/9.5

SENSIBLE HEAT RATIO

0.74

0.72

0.70

0.70

HEAT PUMP DATA

 

 

 

 

HEATING BTUh

 

N/A

 

COP @ 47F

 

N/A

 

HEATING POWER (W)

 

N/A

 

HEATING CURRENT (A)

 

N/A

 

ELECTRICAL DATA

 

 

 

 

VOLTAGE (1 PHASE, 60 Hz)

230/208

230/208

230/208

230/208

VOLT RANGE

253-198

253-198

253-198

253-198

COOLING CURRENT (A)

4.2/4.4

5.2/5.4

8.1/8.5

10.0/10.4

AMPS L.R.

19.8

30

42

34.8

AMPS F.L.

3.5

4.5

7.8

9.5

INDOOR MOTOR (HP)

1/4

1/4

1/4

1/4

INDOOR MOTOR (A)

1.2

1.2

1.2

1.94

OUTDOOR MOTOR (HP)

 

N/A

 

1/4

OUTDOOR MOTOR (A)

 

N/A

 

0.85

AIRFLOW DATA

 

 

 

 

INDOOR CFM*

300

350

450

610

VENT CFM

60

60

60

60

MAX. ESP

.3"

.3"

.3"

.4"

PHYSICAL

 

 

 

 

DIMENSIONS (W x D x H)

23x23x32

23x23x32

23x23x32

23x23x47

NET WEIGHT (LBS)

114

124

144

167

SHIPPING WEIGHT (LBS)

125

135

155

220

R410A CHARGE (oz)

33.5

35.5

48

65

* Normal Value Wet Coil @ .1"ESP.

VHA09K

VHA12K

VHA18K

VHA24K

 

 

 

 

9200/9000

11500/11200

17000/16800

23000/22800

939

1186

1868

2527

9.8/9.8

9.7/9.7

9.1/9.1

9.1/9.1

0.74

0.72

0.70

0.70

 

 

 

 

8500

10800

16000

20000

3.0

3.0

3.0

3.0

830

1055

1563

1953

3.6

4.9

7.5

9.4

 

 

 

 

230/208

230/208

230/208

230/208

253-198

253-198

253-198

253-198

4.1/4.3

5.3/5.5

8.2/8.5

10.6/10.8

18.5

26

42

34.8

3.5

5

7.8

9.5

1/4

1/4

1/4

1/4

1.2

1.2

1.2

1.94

 

N/A

 

1/4

 

N/A

 

0.85

 

 

 

 

300

420

450

610

60

60

60

60

.3"

.3"

.3"

.4"

 

 

 

 

23x23x32

23x23x32

23x23x32

23x23x47

114

125

144

167

125

135

155

220

39

42

52

74

ELECTRIC HEAT DATA

 

 

 

 

 

 

 

 

 

 

VE/VHA09

 

 

VE/VHA12

 

 

 

HEATER WATTS

2500/2050

3400/2780

5000/4090

2500/2050

3400/2780

5000/4090

 

 

VOLTAGE

 

230/208

 

 

230/208

 

 

 

HEATING BTUh

8500/7000

11600/9500

17000/13900

8500/7000

11600/9500

17000/13900

 

 

HEATING CURRENT (AMPS)

10.9/9.9

14.8/13.4

21.7/19.7

10.9/9.9

14.8/13.4

21.7/19.7

 

 

MINIMUM CIRCUIT AMPACITY

15

19.9

28.6

15

19.9

28.6

 

 

BRANCH CIRCUIT FUSE (AMPS)

15

20

30

15

20

30

 

 

BASIC HEATER SIZE

2.5 Kw

3.4 Kw

5.0 Kw

2.5 Kw

3.4 Kw

5.0 Kw

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC HEAT DATA

 

 

 

 

 

 

 

 

 

 

VE/VHA18

 

 

 

VE/VHA24

 

 

HEATER WATTS

2500/2050

3400/2780

5000/4090

2500/2050

3400/2780

5000/4090

7500/6135

10000/8180

VOLTAGE

 

230/208

 

 

 

230/208

 

 

HEATING BTUh

8500/7000

11600/9500

17000/13900

8500/7000

11600/9500

17000/13900

25598/2093934130/27918

HEATING CURRENT (AMPS)

10.9/9.9

14.8/13.4

21.7/19.7

10.9/9.9

14.8/13.4

21.7/19.7

32.6/29.5

43.5/39.3

MINIMUM CIRCUIT AMPACITY

15

19.9

28.6

17.2/15.9

22.1/20.3

30.7/28.1

44.3/40.3

57.9/52.7

BRANCH CIRCUIT FUSE (AMPS)

15

20

30

25

25

30

45

60

BASIC HEATER SIZE

2.5 Kw

3.4 Kw

5.0 Kw

2.5 Kw

3.4 Kw

5.0 Kw

7.5 Kw

10.0 Kw

6

Extended Cooling Performance

VEA - EXTENDED COOLING PERFORMANCE

 

 

 

 

 

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

 

 

 

 

 

 

75

 

 

85

 

 

95

 

 

105

 

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INDOOR WET

BULB TEMP. (DEGREES F AT 80 F D.B.)

 

 

 

 

 

72

67

62

72

67

62

72

67

62

72

67

62

72

67

62

 

BTUh

11054

10631

9842

10528

9926

9156

10114

9400

8319

9475

8413

7417

8954

7835

6914

VEA09

WATTS

783

795

804

853

861

872

959

959

959

1037

1036

1039

1084

1083

1087

AMPS

3.5

3.5

3.5

3.7

3.8

3.8

4.2

4.20

4.2

4.5

4.5

4.5

4.7

4.7

4.7

 

 

SHR

0.51

0.69

0.93

0.52

0.71

0.95

0.52

0.74

0.95

0.53

0.78

0.96

0.55

0.81

0.95

 

BTUh

13524

13007

12041

12880

12144

11201

12374

11500

10178

11592

10293

9074

10954

9585

8458

VEA12

WATTS

957

972

983

1043

1053

1066

1173

1173

1173

1268

1267

1270

1325

1325

1330

AMPS

4.3

4.3

4.4

4.6

4.7

4.7

5.2

5.20

5.2

5.6

5.6

5.6

5.9

5.9

5.9

 

 

SHR

0.49

0.67

0.90

0.50

0.70

0.92

0.51

0.72

0.92

0.52

0.76

0.93

0.53

0.79

0.93

 

BTUh

19992

19227

17799

19040

17952

16558

18292

17000

15045

17136

15215

13413

16193

14170

12504

VEA18

WATTS

1541

1565

1582

1678

1695

1716

1888

1888

1888

2041

2039

2045

2133

2132

2140

AMPS

6.7

6.7

6.8

7.2

7.2

7.3

8.1

8.10

8.1

8.7

8.7

8.7

9.1

9.1

9.1

 

 

SHR

0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.90

0.50

0.74

0.90

0.52

0.76

0.9

 

BTUh

27048

26013

24081

25760

24288

22402

24748

23000

20355

23184

20585

18147

21908

19171

16917

VEA24

WATTS

1976

2007

2029

2152

2174

2201

2421

2421

2421

2617

2615

2622

2736

2735

2744

AMPS

8.3

8.3

8.4

8.9

9.0

9.0

10.0

10.00

10.1

10.8

10.8

10.8

11.3

11.3

11.3

 

 

SHR

0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.9

0.5

0.74

0.9

0.52

0.76

0.9

 

 

 

 

 

 

 

 

RATING POINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ARI 310/380

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VHA - EXTENDED COOLING PERFORMANCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

 

 

 

 

 

 

75

 

 

85

 

 

95

 

 

105

 

 

110

 

 

 

 

 

 

INDOOR WET

BULB TEMP. (DEGREES F AT 80 F D.B.)

 

 

 

 

 

72

67

62

72

67

62

72

67

62

72

67

62

72

67

62

 

BTUh

10819

10405

9632

10304

9715

8961

9899

9200

8142

9274

8234

7259

8763

7668

6767

VHA09

WATTS

766

778

787

835

843

854

939

939

939

1015

1014

1017

1061

1061

1064

AMPS

3.4

3.4

3.5

3.7

3.7

3.7

4.1

4.10

4.1

4.4

4.4

4.4

4.6

4.6

4.6

 

 

SHR

0.51

0.69

0.93

0.52

0.71

0.95

0.52

0.74

0.95

0.53

0.78

0.96

0.55

0.81

0.95

 

BTUh

13524

13007

12041

12880

12144

11201

12374

11500

10178

11592

10293

9074

10954

9585

8458

VHA12

WATTS

968

983

994

1054

1065

1078

1186

1186

1186

1282

1281

1284

1340

1340

1344

AMPS

4.4

4.4

4.5

4.7

4.7

4.8

5.3

5.30

5.3

5.7

5.7

5.7

6

6

6

 

 

SHR

0.49

0.67

0.9

0.5

0.7

0.92

0.51

0.72

0.92

0.52

0.76

0.93

0.53

0.79

0.93

 

BTUh

19992

19227

17799

19040

17952

16558

18292

17000

15045

17136

15215

13413

16193

14170

12504

VHA18

WATTS

1524

1549

1565

1661

1677

1698

1868

1868

1868

2019

2017

2023

2111

2110

2117

AMPS

6.8

6.8

6.9

7.3

7.3

7.4

8.2

8.20

8.2

8.8

8.8

8.9

9.2

9.2

9.3

 

 

SHR

0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.90

0.50

0.74

0.90

0.52

0.76

0.9

 

BTUh

27048

26013

24081

25760

24288

22402

24748

23000

20355

23184

20585

18147

21908

19171

16917

VHA24

WATTS

2062

2095

2118

2247

2269

2297

2527

2527

2527

2732

2729

2737

2856

2854

2864

AMPS

8.8

8.8

8.9

9.4

9.5

9.5

10.5

10.60

10.7

11.4

11.4

11.4

11.9

11.9

12

 

 

SHR

0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.90

0.50

0.74

0.90

0.52

0.76

0.9

 

 

 

 

 

 

 

 

RATING POINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ARI 310/380

 

 

 

 

 

 

7

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. All electrical connnections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury and/or death.

ELECTRICAL REQUIREMENTS

Wire Size

“Use ONLY time delayed fused disconnect or HACR type circuit breaker as indicated on the unit’s rating plate (see sample on this page). Proper current protection to the unit is the responsibility of the owner”.

Unit MUST

All units must be hard wired with properly sized breaker. See nameplate for specific chassis electrical requirements. See Electrical Rating Table below for wire size. Use HACR type breakers to avoid nuisance trips. All field wiring must be done in accordance with NEC and local codes.

Electrical Rating Tables

 

 

 

 

15A

14

20A

12

30A

10

Supply voltage

Supply voltage to the unit should be a nominal 208/230 volts. It must be between 197 volts and 253 volts. Supply voltage to the unit should be checked WITH THE UNIT IN OPERATION. Voltage readings outside the specified range can be expected to cause operating problems. Their cause MUST be investigated and corrected.

Sample Nameplate

 

 

 

 

 

120524

 

 

 

 

 

 

 

 

 

 

 

COOLING EQUIPMENT

 

 

 

 

 

E

 

 

 

 

 

L

 

 

 

 

P

 

 

 

 

M

 

 

FOLLOWING ITEMS

 

A

 

 

 

 

 

S

 

 

 

 

OUTDOOR GRILLE

 

 

 

 

 

 

 

 

 

 

 

 

INDOOR GRILLE

8