GOODMAN AVPTC37B14 AVPTC Series 3 Ton Single-Stage Multi-Position 3/4 hp Air Handler User guide

Service Instructions

ComfortNet

™

ASXC & DSXC Condensing Units,

ASZC & DSZC Split System Heat Pumps with R-410A Refrigerant

Blowers, Coils, & Accessories

This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.

Copyright © 2015-2016 Goodman Manufacturing Company, L.P.

RS6200007r5 is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.

June 2016

IMPORTANT INFORMATION

Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual.

REVIEW ALL SERVICE INFORMATION IN THE APPROPRIATE SERVICE MANUAL BEFORE

BEGINNING REPAIRS.

IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS

RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS

O

NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL

,

ADJUST

,

SERVICE OR

REPAIR

(

HEREINAFTER

, “

SERVICE

”)

THE EQUIPMENT SPECIFIED IN THIS

MANUAL SHOULD SERVICE THE EQUIPMENT

. T

HE MANUFACTURER WILL NOT

BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM

IMPROPER SERVICE OR SERVICE PROCEDURES

. I

F YOU SERVICE THIS UNIT

,

YOU

ASSUME RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY

RESULT

. I

N ADDITION

,

IN JURISDICTIONS THAT REQUIRE ONE OR MORE

LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS MANUAL

,

ONLY

LICENSED PERSONNEL SHOULD SERVICE THE EQUIPMENT

. I

MPROPER

INSTALLATION

,

ADJUSTMENT

,

SERVICING OR REPAIR OF THE EQUIPMENT

SPECIFIED IN THIS MANUAL

,

OR ATTEMPTING TO INSTALL

,

ADJUST

,

SERVICE OR

REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER

TRAINING MAY RESULT IN PRODUCT DAMAGE

,

PROPERTY DAMAGE

,

PERSONAL

INJURY OR DEATH

.

WARNING

T

O PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH,

DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER

FLAMMABLE LIQUIDS OR VAPORS IN THE VICINITY OF THIS APPLIANCE.

2

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product.

For further assistance, please contact:

CONSUMER INFORMATION LINE

GOODMAN

®

BRAND PRODUCTS

TOLL FREE

1-877-254-4729

(U.S. only) email us at:

[email protected]

fax us at:

(713) 856-1821

(Not a technical assistance line for dealers.)

AMANA ® BRAND PRODUCTS

TOLL FREE

1-877-254-4729

(U.S. only) email us at:

[email protected]

fax us at:

(713) 856-1821

(Not a technical assistance line for dealers.)

Outside the U.S.,

call 1-713-861-2500.

(Not a technical assistance line for dealers.) Your telephone company will bill you for the call.

is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.

IMPORTANT INFORMATION

SAFE REFRIGERANT HANDLING

While these items will not cover every conceivable situation, they should serve as a useful guide.

WARNING

R

EFRIGERANTS ARE HEAVIER THAN AIR.

T

HEY CAN "PUSH OUT" THE

OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE.

T

O AVOID

POSSIBLE DIFFICULTY IN BREATHING OR DEATH:

•

N

EVER PURGE REFRIGERANT INTO AN ENCLOSED ROOM OR SPACE.

B

Y

LAW, ALL REFRIGERANTS MUST BE RECLAIMED.

•

I

F AN INDOOR LEAK IS SUSPECTED, THOROUGHLY VENTILATE THE AREA

BEFORE BEGINNING WORK.

•

L

IQUID REFRIGERANT CAN BE VERY COLD.

T

O AVOID POSSIBLE FROST-

BITE OR BLINDNESS, AVOID CONTACT WITH REFRIGERANT AND WEAR

GLOVES AND GOGGLES.

I

F LIQUID REFRIGERANT DOES CONTACT YOUR

SKIN OR EYES, SEEK MEDICAL HELP IMMEDIATELY.

•

A

LWAYS FOLLOW

EPA

REGULATIONS.

N

EVER BURN REFRIGERANT,

AS POISONOUS GAS WILL BE PRODUCED.

WARNING

T

O AVOID POSSIBLE EXPLOSION:

•

N

EVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER.

I

F YOU

MUST HEAT A CYLINDER FOR FASTER CHARGING, PARTIALLY IMMERSE

IT IN WARM WATER.

•

N

EVER FILL A CYLINDER MORE THAN 80% FULL OF LIQUID REFRIGERANT.

•

N

EVER ADD ANYTHING OTHER THAN

R

-22 TO AN

R

-22 CYLINDER OR

R

-410

A

TO AN

R

-410

A

CYLINDER.

T

HE SERVICE EQUIPMENT USED MUST

BE LISTED OR CERTIFIED FOR THE TYPE OF REFRIGERANT USED.

•

S

TORE CYLINDERS IN A COOL, DRY PLACE.

N

EVER USE A CYLINDER

AS A PLATFORM OR A ROLLER.

WARNING

T

HE

U

NITED

S

TATES

E

NVIRONMENTAL

P

ROTECTION

A

GENCY ("

EPA

")

HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND

DISPOSAL OF REFRIGERANTS INTRODUCED INTO THIS UNIT.

F

AILURE TO

FOLLOW THESE REGULATIONS MAY HARM THE ENVIRONMENT AND CAN

LEAD TO THEH IMPOSITION OF SUBSTANTIAL FINES.

T

HESE REGULATIONS

MAY VARY BY JURISDICTION.

S

HOULD QUESTIONS ARISE, CONTACT YOUR

LOCAL

EPA

OFFICE.

WARNING

T

O AVOID POSSIBLE EXPLOSION, USE ONLY RETURNABLE (NOT DISPOSABLE)

SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM A SYSTEM.

•

E

NSURE THE CYLINDER IS FREE OF DAMAGE WHICH COULD LEAD TO A

LEAK OR EXPLOSION.

•

E

NSURE THE HYDROSTATIC TEST DATE DOES NOT EXCEED 5 YEARS.

•

E

NSURE THE PRESSURE RATING MEETS OR EXCEEDS 400 LBS.

W

HEN IN DOUBT, DO NOT USE CYLINDER.

WARNING

T

O AVOID POSSIBLE INJURY, EXPLOSION OR DEATH, PRACTICE SAFE

HANDLING OF REFRIGERANTS.

WARNING

S

YSTEM CONTAMINANTS, IMPROPER SERVICE PROCEDURE AND/OR PHYSICAL

ABUSE AFFECTING HERMETIC COMPRESSOR ELECTRICAL TERMINALS MAY

CAUSE DANGEROUS SYSTEM VENTING.

The successful development of hermetically sealed refrigeration compressors has completely sealed the compressor's moving parts and electric motor inside a common housing, minimizing refrigerant leaks and the hazards sometimes associated with moving belts, pulleys or couplings.

Fundamental to the design of hermetic compressors is a method whereby electrical current is transmitted to the compressor motor through terminal conductors which pass through the compressor housing wall. These terminals are sealed in a dielectric material which insulates them from the housing and maintains the pressure tight integrity of the hermetic compressor. The terminals and their dielectric embedment are strongly constructed, but are vulnerable to careless compressor installation or maintenance procedures and equally vulnerable to internal electrical short circuits caused by excessive system contaminants.

In either of these instances, an electrical short between the terminal and the compressor housing may result in the loss of integrity between the terminal and its dielectric embedment. This loss may cause the terminals to be expelled, thereby venting the vaporous and liquid contents of the compressor housing and system.

A venting compressor terminal normally presents no danger to anyone, providing the terminal protective cover is properly in place.

If, however, the terminal protective cover is not properly in place, a venting terminal may discharge a combination of

(a) hot lubricating oil and refrigerant

(b) flammable mixture (if system is contaminated with air) in a stream of spray which may be dangerous to anyone in the vicinity. Death or serious bodily injury could occur.

Under no circumstances is a hermetic compressor to be electrically energized and/or operated without having the terminal protective cover properly in place.

See Service Section S-17 for proper servicing.

3

4

PRODUCT IDENTIFICATION

ComfortNet

™

A S X C 16 024 1 AA

1 2 3 4,5 6 6 7 8,9

Brand

A - Amana® brand

D - Deluxe Goodman® brand

Type

S Split System

Type

C: Condenser R-22

H: Heat Pump R-22

X: Condenser R-410A

Z: Heat Pump R-R410A

Communication Feature

C: 4-Wire Communication Ready

SEER

16 - 16 SEER

Engineering

Major/Minor Revisions

Voltage

1 - 208/230V Single-Phase 60 Hz

3 - 208/230V Three-Phase 60 Hz

4 - 460V Three-Phase 60 Hz

Nominal Capacity

024 - 2 Tons

036 - 3 Tons

048 - 4 Tons

060 - 5 Tons


ComfortNet

™

Brand

C Indoor Coil

C A P F 1824 A 6 AA

1 2 3 4 5,6,7,8 9 10 11,12

Unit Application

A Upflow/Downflow Coil

H Horizontal A-Coil

S Horizontal Slab Coil

T Coated Coils

Cabinet Finish

U Unpainted

P Painted

N Unpainted Case

Expansion Device

F Flowrator

T Factory-Installed Non-Adjustable

Expansion Valve

Engineering*


Refrigerant Charge

2 = R-22

4 = R-410A

6 = R-410A or R-22

Nominal Width for Gas Furnace

A = Fits 14" Furnace Cabinet

B = Fits 17-1/2" Furnace Cabinet

C =

Fits 21" Furnace Cabinet

D =

Fits 24-1/2" Furnace Cabinet

N =

Does Not Apply (Horizontal Slab Coils

1824 =

Nominal Capacity @ 13 SEER

1-1/2 - 2 Tons

3030 =

3131 =

3636 =

3642 =

3743 =

4860 =

4961 =

2-1/2 Tons

2-1/2 Tons

3 Tons

3 - 3-1/2 Tons

3 - 3-1/2 Tons

4 - 5 Tons

4 - 5 Tons

5

6


ComfortNet™

Type

V: Speed

MB V C 12 00 A A 1

1,2 3 4 4 5,6 7 8 9

Brand

MB - Modular Blower

Electrical

1: 208-230V/60Hz/1 PH

Design Series

A: First Series

Communication Feature


Airflow

12: 1200 CFM

16: 1600 CFM

20: 2000 CFM

Circuit Breaker

A: No Circuit Breaker

B: Circuit Breaker

Factory Heat

00 No Heat


Brand

A Airhandler

ComfortNet™

A V P T C 1830 1 6 AA

1 2 3 4 5 6,7,8,9 11 12 13,14

Engineering*



V

Variable Speed Motor

Cabinet Finish

U: Unpainted

P: Painted

N: Uncased


F: Flowrator

T: Expansion Valve

Communications



No Digit = R-22 Only

6 = R-410A or R-22

Electrical

1 208/240V, 1 Phase, 60 Hz


Multi-Position & Downflow Applications

1830 = 1-1/2 to 2-1/2 Tons

3137 = 3 Tons

Ceiling Mount & Wall Mount Applications

4260 = 3-1/2 to 5 Tons

7


A V P T C 18 B 1 4 AA

1 2 3 4 5 6,7 8 9 10 11,12

ComfortNet™

Brand

A Single Piece

Airhandler


C Ceiling Mount PSC Motor

R Multi Position PSC Motor

S Multi Position EEM Motor

W Wall Mount PSC/EEM Motor

V Multi Position

Variable Speed Motor -

Communicating

Cabinet Finish

U Unpainted

P Painted

N Uncased


F Flowrator

T Expansion Valve

Communications

C

ComfortNet

TM

Compatible

Engineering*


*Not used for inventory management


4 = R-410a

Electrical

1 208/240V, 1 Phase, 60 Hz

Cabinet Width

B = 17-1/2"

C = 21"

D = 24-1/2"


18 = 1-1/2 Tons

24 = 2 Tons

25 = 2 Tons

29 = 2 Tons

30 = 2-1/2 Tons

31 = 2 Tons

36 = 3 Tons

37 = 2 1/2 - 3 1/2 Tons

42 = 3-1/2 Tons

48 = 4 Tons

49 = 3 - 3 1/2 Tons

59 = 4 - 5 Tons

60 = 5 Tons

61 = 4 - 5 Tons

8

All Airhandlers use

DIRECT DRIVE MOTORS

. Power supply is AC 208-230v, 60 hz, 1 phase.


ASXC16

A

MANA

®

BRAND

S

PLIT

X-C

OMMUNICATING CONDENSERS R-410A 16 SEER

Model/Rev Description

ASXC160**1AA

Introduces Amana® brand 2-stage 16 SEER condensing units with R-410A, communicating models.

ASXC160601BA Use ZPS49 compressor.

ASXC160481BA

ASXC160(24/36)1BB

ASXC160(48-60)1BB

ASXC160(24/36)1BC

ASXC160(48-60)1BC

ASXC160(24/36)1BD

ASXC160(48-60)1BD

ASXC160(241, 481)BE

SmartCoil® coils

Wiring diagram updated with notes.

Motor changed to Nidec.

Introduces Ultratech® 2.0 compressor changes.

Replaced PCBHR103 Communicating Heat Pump Control Board with PCBHR104

Communicating Heat Pump Control Board.

Refrigerant charge reduction

ASXC18

A

MANA

®

BRAND

S

PLIT

X-C



ASXC18**1AA

Initial release of Amana® brand 2-stage 18 SEER condensing units with R-410A, communicating models.

ASXC180(36/48/60)1AB

ASXC180(36/48-60)1AC

ASXC180(36/48/60)1AD


Replaced compressors ZPS20K4EPFV230 with ZPS20K5EPFV130 and compressor

ZPS30K4EPFV230 with ZPS30K5EPFV130.



9


DSXC16

D

ELUXE

S

PLIT

X-C



DSXC160**1AA

Initial release of Goodman® Deluxe brand 2-stage 16 SEER condensing units with R-

410A, communicating models.

DSXC160(24/36)1AB Wiring diagram updated with notes.

DSXC160(24/36)1AC

DSXC160(48-60)1BC

DSXC160481BA

Ultratech® 2.0 compressor.

SmartCoil® coils.

DSXC160601BA ZPS49K compressor.

DSXC160(48-60)1BB

DSXC160(36/48/60)1BD




Model/Rev

DSXC18

DELUXE SPLIT X-C


Description

DSXC18**1AA



DSXC180(36/48/60]1AB

DSXC18036AC

DSXC180(48-60)1AC

DSXC180(36/48/60)1AD




Ultratech® 2.0 compressor change.



10


DSXC16

D

ELUXE

S

PLIT

X-C



DSXC160**1AA



DSXC160(24/36)1AB Wiring diagram updated with notes.

DSXC160(24/36)1AC

DSXC160(48-60)1BC

DSXC160481BA

Ultratech® 2.0 compressor.

SmartCoil® coils.

DSXC160601BA ZPS49K compressor.

DSXC160(48-60)1BB

DSXC160(36/48/60)1BD

DSXC160241AF

DSXC160481BE




Refrigerant charge reduction

ASZC18

A

MANA

®

BRAND

S

PLIT

Z-C

OMMUNICATING HEAT PUMPS R-410A 18 SEER


ASZC180**1AA

Introduces Amana® brand 2-stage 18 SEER heat pump units with R-410A, communicating models.

ASZC180601BC

ASZC180601BB


Release of models with accumulators and crankcase heaters.

ASZC180(36/48/60)1AB

ASZC180(36-4)]1AC

ASZC180601BA

ASZC180361AD

Sanhua (RANCO) reversing valves

11


DSZC16

D

ELUXE

S

PLIT

Z-C

OMMUNICATING HEAT PUMP R-410A 16 SEER


DSZC16**1AA

Initial release of Goodman® brand Deluxe 2-stage 16 SEER heat pump units with R-


DSZC160(24/36)1AB

DSZC160(48/60)1AB

DSZC160(24-48)1AC

DSZC160601BA

DSZC160(24-48)]1AD

DSZC160601BB

DSZC160481AE

DSZC160601BC

Sanhua (RANCO) reversing valves.



DSZC160(24-36)1AE



Model/Rev

DSZC18

DELUXE SPLIT Z-C

OMMUNICATING HEAT PUMP R-410A 18 SEER

Description

DSZC18**1AA

Initial release of Goodman® brand Deluxe 2-stage 18 SEER heat pump units with R-


DSZC180(36/48/60)1AB

DSZC180361AD

DSZC180(36-48)1AC

DSZC180601BA

DSZC160(24-48)1AD

DSZC160601BB

Sanhua (RANCO) reversing valves.





12


AVPTC****14

SINGLE PIECE

A

IR HANDLER MULTIPLE-POSITION

V

ARIABLE SPEED

P

AINTED

T

XV WITH 4-WIRE

C

OMMUNICATING CONTROL


AVPTC183014AA

AVPTC313714AA

AVPTC426014AA

Initial release of 13 SEER air handler with communicating control and serial communicating indoor blower motor.

AVPTC183014AB

AVPTC313714AB

AVPTC426014AB

Replaced PCBJA10 communicating air handler control board with PCBJA103.

AVPTC**14

SINGLE PIECE

A


V

ARIABLE SPEED

P

AINTED

T

XV WITH 4-WIRE

C


Model/Rev

AVPTC24B14AA

AVPTC(30/36)C14AA

AVPTC(42/48/60)D14AA

Description

Initial release of 13 SEER air handler with communicating control and serial communicating indoor blower motor. Redesign of AVPTC models to new air handler cabinetry. Incorporated 4-way, mult-position body utilized on ARTP/ASPt mdoels.

AVPTC48C14AA Updated S&R and travel labels.

AVPTC(42/48/60)14AB

AVPTC60D14AC

Redesign of AVPTC models to new air handler cabinetry. Incorporated 4-way, multposition body utilized on ARTP/ASPt mdoels.

Serial plate update

AVPTC24B14AC

AVPTC30C14AB

Heater Kit airflow update.

AVPTC25B14AA

AVPTC29B14AA

AVPTC31C14AA

AVPTC37B14AA

AVPTC37C14AA

AVPTC37D14AA

AVPTC49D14AA

AVPTC59C14AA

AVPTC59D14AA

AVPTC61D14AA

AVPTC Efficiency Upgrades

The new AVPTC redesign will incorporate the upgrade blower, coil pan and coil design intended to increase efficiency and standardize production.

13


MBVC

M

ODULAR

B

LOWER AIR HANDLER

V-

MULTI-POSITION VARIABLE-SPEED

C

OMMUNICATING READY

W/4-WIRES

Model/Rev

MBVC1200AA1-AA

MBVC1600AA1-AA

MBVC2000AA1-AA

MBVC1200AA1-AB

MBVC1600AA1-AB

MBVC2000AA1-AB

MBVC1200AA1-AC

MBVC1600AA1-AC

MBVC2000AA1-AC

MBVC1200AA1-AD

MBVC1600AA1-AD

MBVC2000AA1-AD

MBVC[1200, 1600,

2000]AA1-AE

Description

Introduction of module blower with variable speed blower motor with the new communicating control & serial communicating indoor blower motor.

Introduction of a module blower with variable speed blower motor with communicating control & serial communicating indoor blower motor. Replaces existing Emerson motors

(013M00111 & 013M00112).

Introduction of a module blower with variable speed blower motor with communicating control & serial communicating indoor blower motor. Quality improvement to use 0.75"

Quiet Flex Insulation.

Introduction of a module blower with variable speed blower motor with communicating control & serial communicating indoor blower motor. Introduces a new Communicating Air

Handler Control Board (PC).

Release of MBR/MBVC Models(Minor Revisions) for 11th St Plant. - Dayton to Houston

Model/Rev

AVPTC**14

SINGLE PIECE

A


V

ARIABLE SPEED

P

AINTED

T

XV WITH 4-WIRE

C


Description

AVPTC24B14AA

AVPTC(30/36)C14AA

AVPTC(42/48/60)D14AA

Initial release of 13 SEER air handler with communicating control and serial communicating indoor blower motor. Redesign of AVPTC models to new air handler cabinetry. Incorporated 4-way, mult-position body utilized on ARTP/ASPt mdoels.

AVPTC48C14AA Updated S&R and travel labels.

AVPTC(42/48/60)14AB

Redesign of AVPTC models to new air handler cabinetry. Incorporated 4-way, multposition body utilized on ARTP/ASPt mdoels.

Serial plate update AVPTC60D14AC

AVPTC24B14AC

AVPTC30C14AB

Heater Kit airflow update.

14


CAUF

C-

INDOOR COIL

A-

UPFLOW/DOWNFLOW

U

NCASED

F

LOWRATOR


CAUF*****6AA Initial release of CAUF Dayton Upflow/Downflow coils.

CAUF*****6BA

CAUF****6*DA

Burr Oak Louvered Fin released in place of the Wavy Fin.

Replaced existing copper coils and other associated parts with aluminum components.

CAUF*****6DB

CAUF1824A6RDB

CAUF1824B6RDB

CAUF36***CA

Drain pan material changed.

Manufacturing Location Change from Dayton to Houston. Designated by "R".

Redesign from 2 row to 3 row for performance improvement .

CAUF3030(A/B)6RDB

CAUF3030(C/D)6RDB

CAUF3131(B/C)6RDB

Manufacturing Location Change from Dayton to Houston. Designated by "R".

CAPF

C-

INDOOR COIL

A-

UPFLOW/DOWNFLOW

P

AINTED

F

LOWRATOR


CAPF*****6AA Initial release of CAPF Dayton Upflow/Downflow coils.

CAPF*****6BA

CAPF36***CA

CAPF*****6DA

CAPF*****6DB

Model/Rev

CAPT3131C4BA

CAPT3131C4BA

CAPT3743C4AA

CAPT3743D4AA

Model/Rev

CHPF*****6AA

CHPF*****6BA

Burr Oak Louvered Fin released in place of the Wavy Fin.

Redesigned for performance improvement from 2 row to 3 row.

Replaced existing copper coils and other associated parts with aluminum components.


CAPT

C-

INDOOR COIL

A-

UPFLOW/DOWNFLOW

P

AINTED

T

XV

Description

Initial release of coils with factory-installed non-adjustable TXV.Development of single stage AHRI ratings for CAPT3131 NTC combinations.

Initial release of coils with factory-installed non-adjustable TXV.Development of single stage AHRI ratings for CAPT3743 NTC combinations.

CHPF

C

-INDOOR COIL

H

ORIZONTAL A-COIL

P

AINTED

F

LOWRATOR

Description

Intial release of 13 SEER CHPF horizontal A coil.

Released Burr Oak Louvered Fin in place of the Wavy Fin. The rows changed by one, (i.e.

4 row to 3 row; 3 row to 2 row) where applicable.

CHPF1824A6CB

CHPF2430B6CB

CHPF3636B6CB

CHPF3642C6CB

CHPF3642D6CB

CHPF3743C6BB

CHPF3743D6BB

CHPF4860D6DB


15


CSCF

C-

INDOOR COIL

S-

HORIZONTAL SLAB COIL

C

-UNPAINTED

F

LOWRATOR


CSCF*****6AA

CSCF*****6BA

Initial release of 13 SEER CSCF horizontal slab coils.

Burr Oak Louvered Fin released in place of the Wavy Fin. Rows reduced by one where applicable.

CSCF1824N6BB

CSCF3036N6BB

CSCF3642N6CB

CSCF4860N6CB

CSCF1824N6CA

CSCF3036N6CA

CSCF3642N6CA

CSCF4860N6CA


Replaced copper coils and other associated parts with aluminum components.

16

ACCESSORIES

ASXC/DSXC 16

ASXC/DSXC 18

Model

ABK-20

Description

Anchor Bracket Kit

ASXC16024

DSXC16024

X

X

ASXC16036

DSXC16036

X

ASXC16048

DSXC16048

X

ASXC16060

DSXC16060

X

X

X X

CSR-U-1

CSR-U-2

CSR-U-3

FSK01A

LSK02

1

B1141643

3

Hard-start Kit

Hard-start Kit

Hard-start Kit

Freeze Protection Kit

Liquid Line Solenoid

Valve

24V Transformer

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

* Contains 20 brackets; four brackets needed to anchor unit to pad.

Installed on the indoor coil.

Available in 24V legacy mode only. This feature is integrated in the communicating mode.

This component is included in the CTK0*** communicating thermostat kit.

X

X

X

X

X

ComfortNet™

ASXC18036

DSXC18036

X

ASXC18048

DSXC18048

X

X

X

X

X

X

ASXC18060

DSXC18060

X

X

X

X

X

X

ASZC/DSZC 16

ASZC/DSZC 18

Model Description

ABK-20 Anchor Bracket Kit

TX2N4

1

TX3N4

1

TX5N4

1

TXV Kit

TXV Kit

TXV Kit

CSR-U-1 Hard-start Kit



FSK01A

2

Freeze Protection Kit

OT18-60A

3

Outdoor Thermostat/

Lockout Thermostat

B1141643

4

24V Transformer

ASZC16024

DSZC16024

X

X

ASZC16036

DSZC16036

X

ASZC16048

DSZC16048

X

X

X

X

X

X

X

X

X

X

X

X

X X X

ASZC16060

DSZC16060

X

ASZC18036

DSZC18036

X

ASZC18048

DSZC18048

X

ASZC18060

DSZC18060

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

* Contains 20 brackets; four brackets needed to anchor unit to pad

1 Field-installed, non-bleed, expansion valve kit - Condensing units and heap pumps with reciprocating compressors require the use of start-assist components when used in conjunction with an indoor coil using a non-bleed thermal expansion valve refrigerant

2

Installed on the indoor coil

3 Available in 24V legacy mode only. This feature is integrated in the communicating mode. Required for heat pump applications where ambient temperature fall below 0 °F with 50% or higher relative humidity.

4

This component is included in the CTK0*** communicating thermostat kit.

17

ACCESSORIES

EXPANSION VALVE KITS

1/4 FLARE CONNECTION

EVAPORATOR COIL

SUCTION LINE

1/4' FLARE

CONNECTION

BULB

BULB TO BE LOCATED

AT 10 OR 2 O'CLOCK

For Applications requiring a field installed access fitting

SEAL SUPPLIED W/ KIT

SEAL SUPPLIED W/ KIT

EXPANSION VALVE

DISTRIBUTOR

BODY

REMOVE BEFORE INSTALLING EXPANSION VALVE

PISTON

SEAL

TAILPIECE

3/8"-

SWEAT

7/8" NUT

BULB TO BE LOCATED

AT 10 OR 2 O'CLOCK

For Applications not requiring a field installed access fitting

BULB

SUCTION LINE

EXPANSION VALVE

EVAPORATOR COIL

SEAL SUPPLIED W/ KIT

REMOVE BEFORE

INSTALLING

EXPANSION VALVE

SEAL SUPPLIED W/ KIT

DISTRIBUTOR

BODY

PISTON

SEAL

TAILPIECE

3/8"-

SWEAT

7/8" NUT

18

ACCESSORIES

Wire Nut

Y

B la ck

Bl ac k

Wire Nut

Y

FSK01A

FREEZE THERMOSTAT

KIT

Install Line

Thermostat

Here

Install Line

Thermostat

Here

Wire Nut

Black

Bla ck

Wire Nut

Y

Y

19

ACCESSORIES

ELECTRIC HEAT KIT

BLOWER

MBVC1200AA-1**

MBVC1600AA-1**

MBVC2000AA-1**

-

-

-

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X = Allowable combinations ^ = Circuit 1: Single Phase for Air Handler Motor

- = Restricted combinations Circuit 2: 3-Phase for HKR3 Heater Kits

X

X

-

-

-

X

-

-

-

-

-

-

HK* SERIES ELETRIC HEAT KITS -

ELECTRIC HEAT KIT APPLICATIONS - MBVC

20

ACCESSORIES

ELECTRIC HEAT KIT APPLICATIONS - AVPTC

MODELS

AVPTC183014A*

AVPTC313714A*

AVPTC426014A*

HKR-03*

X

X

X

HKR-05*/-05C*

X

X

X

HKR-06*

X

X

X

HKR-08*/-08C*

X

1

X

1

X

HKR-10*/-10C*

X

1

X

1

X

HKR-15C*

---

X2

X

* Revision level that may or may not be designated.

C Circuit breaker option.

NOTE:

When 8kW and 10kW heat kits are used with an AVPTC1830 and AVPTC3137, matched with 2- ton outdoor unit, see Note 1 below.

1 Set Heater Kit dip switches 9, 10 and 11 to 6kW setting (9-ON, 10-OFF,11-ON) to obtain 840 CFM.

2 This heater kit can only be used for ‘1000 CFM or higher’ applications.

3

This heater kit can only be used for ‘1200 CFM or higher’ applications.

HKR-20C*

---

---

X3

HKR-21C*

---

---

X3

HKA-15C*

---

X

2

X

HKA-20C*

---

X

X

3

21

ACCESSORIES

AVPTC**14**

Heat Kit Applications

Type / Model

HKSX03XC

HKSX05XC

HKSX06XC

HKSX08XC

HKSX10XC

HKSX15XF*

HKSX20XF*

HKSC05XC

HKSC08XC

HKSC10XC

HKSC15XA

HKSC15XB

HKSC15XF*

HKSC19CA*

HKSC19CB*

HKSC20DA

HKSC20DB

HKSCX20XF*

HKSC25DC*

24B14-A*

X

X

X

X

X

X

X

X

* Revisio n level that may o r may no t be designated.

Refer to the minimum airflo w requirements fo r each o f the heat kits.

30C14-A*

X

X

X

X

X

X

X

X

36C14-A*

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

AVPTC

48C14-A*

†For ma tch up wi th a 2 ton outdoor unit: Hea ter ki t appl i ca Ɵ on s hal l not exceed 10 kW.

Airfl ow for 5 kW up to 10 kW hea ter ki ts s hal l be s et to 850 cfm s peed ta p of ON-ON-ON.

††For ma tch up wi th a 3 ton outdoor uni t: Hea ter ki t a ppli ca Ɵ on s ha l l not exceed 15 kW.

Airfl ow for 5 kW up to 15 kW hea ter ki ts s hal l be s et to 1400 cfm s peed ta p of ON-ON-OFF.

†††For ma tch up wi th a 3.5 ton outdoor uni t: Heater ki t a ppl i ca Ɵ on s hal l not exceed 20 kW.

Ai rfl ow for 5 kW up to 20 kW hea ter kits s ha l l be s et to 1620 cfm speed ta p of ON-ON-OFF

** 3 kW heater ki t i s not a ppli ca ble for thi s i ndoor appl i ca ti on.

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

42D14-A*

†

X

X

X

X

X

X

X

X

X

X

X

X

X

48D14-A*

††

60D14-A*

†††

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

22

ACCESSORIES

READY 15 AVPTC

Heat Kit Selection

Type / Model

HKSX03XC*

HKSX05XC*

HKSX06XC*

HKSX08XC*

HKSX10XC*

HKSC05XC*

HKSC08XC*

HKSC10XC*

HKSC15XA*

HKSC15XB*

HKSC15XF*

HKS*15*#*

HKSC19CA*

HKSC19CB*

HKSC19C*#*

HKSC20D#*

HKSC20DA*

HKSC20DB*

HKSC20XF*

HKSC25DC*

C Circuit breaker option

X

X

X

X

X

X

X

25B14*

X

X

X

X

X

X

X

X

X

X

29B14*

X

X

X

X

X

X

X

X

X

X

X

37B14*

X

X

X

X

X

31C14*

AVPTC

37C14* 59C14*

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

37D14* 59D14* 49D14* 61D14*

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

23

PRODUCT DESIGN

This section gives a basic description of cooling unit operation, its various components and their basic operation.

Ensure your system is properly sized for heat gain and loss according to methods of the Air Conditioning Contractors

Association (ACCA) or equivalent.

The ZPS two-step modulated scroll uses a single step of unloading to go from full capacity to approximately 67% capacity.

A single speed, high efficiency motor continues to run while the scroll modulates between the two capacity steps.

CONDENSING UNIT

The condenser air is pulled through the condenser coil by a direct drive propeller fan. This condenser air is then discharged out of the top of the cabinet. These units are designed for free air discharge, so no additional resistance, like duct work, shall be attached.

The suction and liquid line connections on present models are of the sweat type for field piping with refrigerant type copper. Front seating valves are factory installed to accept the field run copper. The total refrigerant charge for a normal installation is factory installed in the condensing unit.

ASXC, ASZC, DSXC, DSZC models are available in 2 through 5 ton sizes and use R-410A refrigerant. They are designed for 208/230 volt single phase applications.

ASXC, ASZC, DSXC, DSZC R-410A model units use the

Copeland Scroll "Ultratech" Series compressors which are specifically designed for R-410A refrigerant. These units also have Copeland

®

ComfortAlert diagnostics. The Copeland

®

ComfortAlert diagnostics are integrated into the unitary (UC) control. These models are ComfortNet TM ready.

There are a number of design characteristics which are different from the traditional reciprocating and/or scroll compressors.

"Ultractech" Series scroll compressors will not have a discharge thermostat. Some of the early model scroll compressors required discharge thermostat.

"Ultratech" Series scroll compressors use "POE" or polyolester oil which is

NOT

compatible with mineral oil based lubricants like 3GS. "POE" oil must be used if additional oil is required.

The ASXC [16 & 18], ASZC [16 & 18], DSXC [16 & 18] and

DSZC [16 & 18] series split system units use a two-stage scroll compressor. The two-step modulator has an internal unloading mechanism that opens a bypass port in the first compression pocket, effectively reducing the displacement of the scroll. The opening and closing of the bypass port is controlled by an internal electrically operated solenoid.

FIGURE A

A scroll is an involute spiral which, when matched with a mating scroll form as shown, generates a series of crescent shaped gas pockets between the two members.

During compression, one scroll remains stationary (fixed scroll) while the other form (orbiting scroll) is allowed to orbit

(but not rotate) around the first form.

As this motion occurs, the pockets between the two forms are slowly pushed to the center of the two scrolls while simultaneously being reduced in volume. When the pocket reaches the center of the scroll form, the gas, which is now at a high pressure, is discharged out of a port located at the center.

During compression, several pockets are being compressed simultaneously, resulting in a very smooth process. Both the suction process (outer portion of the scroll members) and the discharge process (inner portion) are continuous.

Some design characteristics of the Compliant Scroll compressor are:

• Compliant Scroll compressors are more tolerant of liquid refrigerant.

NOTE

: Even though the compressor section of a Scroll compressor is more tolerant of liquid refrigerant, continued floodback or flooded start conditions may wash oil from the bearing surfaces causing premature bearing failure.

24

PRODUCT DESIGN

• Compliant scroll compressors perform "quiet" shutdowns that allow the compressor to restart immediately without the need for a time delay. This compressor will restart even if the system has not equalized.

NOTE:

Operating pressures and amp draws may differ from standard reciprocating compressors. This information can be found in the unit's Technical Information

Manual.

CAPACITY CONTROL - COMFORTNET

TM

MODELS

During the compression process, there are several pockets within the scroll that are compressing gas. Modulation is achieved by venting a portion of the gas in the first suction pocket back to the low side of the compressor thereby reducing the effective displacement of the compressor. See

Figure A.

Full capacity is achieved by blocking these vents, increasing the displacement to 100%. A solenoid in the compressor, controlled by an external 24-volt ac signal, moves the slider ring that covers and uncovers these vents.

The vent covers are arranged in such a manner that the compressor operates somewhere around 67% capacity when the solenoid is not energized and 100% capacity when the solenoid is energized. The loading and unloading of the two step scroll is done “on the fly” without shutting off the motor between steps. See Figure C below

.

The unloaded mode default was chosen for two reasons:

Molded Plug*

Internal Unloader

Coil

24 VAC

*Rectifier is integrated on the UC PCB

FIGURE C

Line

Run Capacitor

Line

1. It is expected that the majority of run hours will be in the low capacity, unloaded mode.

2. It allows a simple two-stage thermostat to control capacity through the second stage in both cooling and possibly heating if desired.

UNLOADER SOLENOID

A nominal 24-volt direct current coil activates the internal unloader solenoid. The input control circuit voltage must be

18 to 28 volt ac. The coil power requirement is 20 VA. The external electrical connection is made with a molded plug assembly. This plug is connected to the Communicating

Unitary Control PCB (UC PCB) which contains a full wave rectifier to supply direct current to the unloader coil.

COILS AND BLOWER COILS

MBVC blower cabinets are designed to be used as a twopiece blower and coil combination and can be utilized with the

CAUF, CAPF and CAPT coils for upflow and downflow applications. The CACF and CHPF coils are designed for horizontal applications. This two-piece arrangement allows for a variety of mix-matching possibilities providing greater flexibility.

The MBVC blower cabinets use a variable speed motor that maintains a constant airflow with a higher duct static. MBVC blower cabinets are approved for applications with cooling coils of up to 0.8 inches W.C. external static pressure. The

MBVC models allow airflow trimming of +/-10%.

All units are constructed with R-4.2 insulation. In areas of extreme humidity (greater than 80% consistently), insulate the exterior of the blower with insulation having a vapor barrier equivalent to ductwork insulation, providing local codes permit.

AVPTC Multi-Position Air Handler

AVPTC is a multi-position, variable-speed air handler used with R-410A and are available in 2 to 5 ton sizes with optional

3 kW to 25kW electric heat kits available for field installation.

The AVPTC unit’s blower design includes a variable-speed

ECM motor and is compatible with heat pumps and variablecapacity cooling applications.

This appliance can be installed in the vertical or left horizontal position without modification. The horizontal right and downflow positions require product modification. This product is designed for zero inches (0 inches) clearance; however, adequate access for service or replacement must be considered without removing permanent structure. This unit can be installed on a platform when deemed necessary.

In an attic installation a secondary drain pan must be provided by the installer and placed under the entire unit with a separate drain line properly sloped and terminated in an area visible to the owner. This secondary drain pan is required in the event that there is a leak or main drain blockage. Closed cell insulation should be applied to the drain lines in unconditioned spaces where sweating may occur.

NOTE:

AVPTC air handlers are factory-sealed to achieve a

2% or less leakage rate at 1.0" water gauge external duct static pressure.

25

PRODUCT DESIGN

Communicating Unitary Control (UC) PCB

The Communicating System Unitary Control PCB is a microprocessor-based control for heat pump and air conditioning condensing units with single-phase compressors up to 5 ton capacity operating on standard residential or Delta and Wye commercial power. The control incorporates the basic functionality of existing defrost controls, outdoor thermostats, contactors, compressor staging controls, short cycle controls, line voltage monitors, Comfort Alert™ or CoreSense

Module (dependent upon which module you are using), two speed condenser fan relays and the Active Protection component of enabled thermostats. The control is designed to work as part of a fully communicating HVAC system with 4 wires. The control also supports legacy 24VAC thermostat inputs for Y1, Y2, O and 24VAC outputs for RVS, W1, and L for non-communicating systems. Outputs include compressor power, compressor stage select, and outdoor fan high and outdoor fan low speed. System inputs include high/low pressure switches, as well as thermistor inputs for outdoor coil temperature and outdoor air temperature.

26

SYSTEM OPERATION

COOLING

The refrigerant used in the system is R-410A. It is a clear, colorless, non-toxic and non-irritating liquid. R-410A is a

50:50 blend of R-32 and R-125. The boiling point at atmospheric pressure is

-62.9°F.

A few of the important principles that make the refrigeration cycle possible are: heat always flows from a warmer to a cooler body. Under lower pressure, a refrigerant will absorb heat and vaporize at a low temperature. The vapors may be drawn off and condensed at a higher pressure and temperature to be used again.

The indoor evaporator coil functions to cool and dehumidify the air conditioned spaces through the evaporative process taking place within the coil tubes.

NOTE:

The pressures and temperatures shown in the refrigerant cycle illustrations on the following pages are for demonstration purposes only. Actual temperatures and pressures are to be obtained from the "Expanded Performance

Chart".

Liquid refrigerant at condensing pressure and temperatures,

(270 psig and 122°F), leaves the outdoor condensing coil through the drier and is metered into the indoor coil through the metering device. As the cool, low pressure, saturated refrigerant enters the tubes of the indoor coil, a portion of the liquid immediately vaporizes. It continues to soak up heat and vaporizes as it proceeds through the coil, cooling the indoor coil down to about 48°F.

Heat is continually being transferred to the cool fins and tubes of the indoor evaporator coil by the warm system air. This warming process causes the refrigerant to boil. The heat removed from the air is carried off by the vapor.

As the vapor passes through the last tubes of the coil, it becomes superheated. That is, it absorbs more heat than is necessary to vaporize it. This is assurance that only dry gas will reach the compressor. Liquid reaching the compressor can weaken or break compressor valves.

The compressor increases the pressure of the gas, thus adding more heat, and discharges hot, high pressure superheated gas into the outdoor condenser coil.

In the condenser coil, the hot refrigerant gas, being warmer than the outdoor air, first loses its superheat by heat transferred from the gas through the tubes and fins of the coil. The refrigerant now becomes saturated, part liquid, part vapor and then continues to give up heat until it condenses to a liquid alone. Once the vapor is fully liquefied, it continues to give up heat which subcools the liquid, and it is ready to repeat the cycle.

HEATING

The heating portion of the refrigeration cycle is similar to the cooling cycle. By energizing the reversing valve solenoid coil, the flow of the refrigerant is reversed. The indoor coil now becomes the condenser coil, and the outdoor coil becomes the evaporator coil.

The check valve at the indoor coil will open by the flow of refrigerant letting the now condensed liquid refrigerant bypass the indoor expansion device. The check valve at the outdoor coil will be forced closed by the refrigerant flow, thereby utilizing the outdoor expansion device.

COOLING CYCLE

For communicating room thermostat: When the room thermostat calls for either low stage cool or high stage cool, appropriate commands are sent via the data 1 and data 2 lines to the outdoor unit's UC control. The UC control energizes the on-board compressor relay and the on-board outdoor fan relay. The compressor high stage solenoid is energized if it is a high stage call.

The UC control sends a fan command to the indoor unit (air handler or furnace). The indoor unit operates the indoor blower at the appropriate airflow level. The system operates at the cooling level demanded by the thermostat.

When the thermostat is satisfied, appropriate commands are sent to the UC control. The compressor relay and outdoor fan relay is de-energized. The compressor high stage solenoid is de-energized if it was energized. The UC control sends an appropriate command to the indoor unit to deenergize the indoor blower motor.

If room thermostat fan status is set to be “on”, then indoor blower would run continuously rather than cycling with the compressor.

For heat pumps, the reversing valve is energized during the cooling cycle. The call for cooling from the communicating thermostat indicates to the control that the reversing valve is to be energized during cooling operation.

HEATING CYCLE

For communicating room thermostat: When the room thermostat calls for either low stage heat or high stage heat, appropriate commands are sent via the data 1 and data 2 lines to the outdoor unit's UC control. The UC control energizes the on-board compressor relay and the on-board outdoor fan relay. The compressor high stage solenoid is energized if it is a high stage call. The UC control sends a fan command to the indoor unit (air handler or furnace). The indoor unit operates the indoor blower at the appropriate airflow level.

The system operates at the cooling level demanded by the thermostat.

When the thermostat is satisfied, appropriate commands are sent to the UC control. The compressor relay and outdoor fan relay is de-energized. The compressor high stage solenoid is de-energized if it was energized. The UC control sends an appropriate command to the indoor unit to deenergize the indoor blower motor.

27


DEFROST CYCLE - COMFORTNET TM MODELS

The defrosting of the outdoor coil is jointly controlled by the

UC PCB and the outdoor coil temperature (OCT) sensor.

The OCT sensor is clamped to a feeder tube entering the outdoor coil. Defrost timing periods of 30, 60, 90 or 120 minutes may be selected via the dipswitch settings on the UC

PCB. In a communicating system, the defrost timing periods can also be selected in the communicating thermostat user menu. During operation, if the coil temperature is low enough

(approximately 31° F), the microprocessor will accumulate the compressor run time. When the total compressor run time reaches 30, 60, 90 or 120 minutes, and there is a call for heat, the PCB will initiate a defrost cycle. When the microprocessor detects the coil temperature to be high enough (approximately 75 0 F), or 10 minutes of maximum defrost cycle time has elapsed, whichever occurs first, the defrost cycle is terminated and the timing period is reset. The field service personnel can also advance a heat pump to the defrost cycle by simultaneously pressing the “TEST” button and the “RECALL” button on the UC board.

Use the dipswitches to select defrost time interval (30, 60, 90 or 120 minutes) See chart below

28


COOLING CYCLE

Indoor

Coil

Accumulator

Reversing Valve

(Energized)

Outdoor

Coil

Thermostatic

Expansion

Valve

Bi-Flow

Filter Dryer

Check Valve

HEATING CYCLE

Indoor

Coil

Accumulator

Reversing Valve

(De-Energized)

Outdoor

Coil

Thermostatic

Expansion

Valve

Bi-Flow

Filter Dryer

Check Valve

29


EXPANSION VALVE/CHECK VALVE ASSEMBLY

IN COOLING OPERATION

EXPANSION VALVE/CHECK VALVE ASSEMBLY

IN HEATING OPERATION

Most expansion valves used in current Goodman/Amana ® Brand Heat Pump products use an internally checked expansion valve.

This type of expansion valve does not require an external check valve as shown above.

However, the principle of operation is the same.

30

TROUBLESHOOTING CHART

C OOLIN G/H P AN ALYSIS C H AR T

Com plain t No Coo lin g

Un s atis factor y

Co o lin g/He atin g

Sys te m

Op e r atin g

Pr e s s ur e s

P OSS IBLE CAUSE

DOTS IN ANALYSIS

GUIDE INDICATE

"P OSS IBLE CAUSE"

Te st Me thod

Re m e dy

Pow er Failure

Blow n Fus e

Loose Connection

Shorted or Broken Wires

Open Fan Ov erload

Faulty Thermos tat

Faulty Trans f ormer

Shorted or Open Capac itor

Internal Compres sor Ov erload Open

Shorted or Grounded Compress or

Compres s or Stuck

Faulty Compres s or Contac tor

Faulty Fan Relay

Open Control Circuit

Low V oltage

Faulty Ev ap. Fan Motor

Shorted or Grounded Fan Motor

Improper Cooling A ntic ipator

Shortage of Ref rigerant

Res tric ted Liquid Line

Open Element or Limit on Elec . Heater

Dirty A ir Filter

Dirty Indoor Coil

Not enough air across Indoor Coil

Too much air ac ros s Indoor Coil

Ov erc harge of Ref rigerant

Dirty Outdoor Coil

Noncondens ibles

Rec irc ulation of Condens ing A ir

Inf iltration of Outdoor A ir

Improperly Located Thermos tat

A ir Flow Unbalanced

Sy s tem Unders iz ed

Broken Internal Parts

Broken V alv es

Inef f ic ient Compres sor

Wrong Ty pe Ex pans ion V alv e

Ex pans ion Devic e Res tric ted

Ov ers ized Ex pansion V alv e

Unders iz ed Expans ion V alve

Ex pans ion V alv e Bulb Loose

Inoperativ e Expans ion V alve

Loose Hold-dow n Bolts

Faulty Rev ers ing V alv e

Faulty Def ros t Control

Faulty Def ros t Thermos tat

Flow rator Not Seating Properly

•

• • •

• • •

• • • • • •

• •

• • •

• •

• • • • •

•

•

•

•

• • •

•

•

•

• •

• •

•

•

•

•

• •

• •

♦

•

• • •

• • •

• • •

• •

• •

•

•

•

•

•

•

• • •

•

• •

• •

•

•

• • • •

• • • •

•

• • • •

• •

•

•

•

•

Co oling or He ating Cycle (He at Pu m p )

Tes t V oltage

Inspect Fus e Siz e & Ty pe

Inspect Connection - Tighten

Tes t Circuits With Ohmmeter

S-1

S-1

S-2, S-3

S-2, S-3

Tes t Continuity of Ov erload

Tes t Continuity of Thermos tat & Wiring

Chec k Control Circ uit w ith V oltmeter

Tes t Capac itor

Tes t Continuity of Ov erload

S-17A

S-3

S-4

S-15

S-17A

♦

♦

Tes t Motor Windings

Use Tes t Cord

Tes t Continuity of Coil & Contac ts

Tes t Continuity of Coil A nd Contac ts

Tes t Control Circ uit w ith V oltmeter

S-17B

S-17D

S-7, S-8

S-7

S-4

•

Tes t V oltage

♦

Repair or Replac e

•

Tes t Motor Windings

Chec k Res istanc e of A ntic ipator

S-1

S-16

S-16

S-3B

•

♦

♦

♦

♦

• •

• •

•

•

•

♦

♦

Tes t For Leaks , A dd Ref rigerant

•

Remov e Restriction, Replac e Res tric ted Part

Tes t Heater Element and Controls

♦

Inspect Filter-Clean or Replace

♦

Inspect Coil - Clean

♦

Chec k Blow er Speed, Duc t Static Press , Filter

•

Reduce Blow er Speed

• •

Rec over Part of Charge

•

Inspect Coil - Clean

•

Rec over Charge, Ev acuate, Recharge

•

Remov e Obstruc tion to A ir Flow

Chec k Window s, Doors , V ent Fans, Etc .

Relocate Thermos tat

Readjus t A ir V olume Dampers

Ref igure Cooling Load

S-101,103

S-112

S-26,S-27

S-200

S-200

S-113

S-114

•

♦

•

♦

•

•

Replac e Compres sor

♦ ♦ ♦ ♦ ♦ ♦

Replac e V alv e or Solenoid

♦ ♦ ♦ ♦ ♦ ♦

Tes t Control

♦ ♦ ♦ ♦ ♦ ♦ ♦

Tes t Def ros t Thermostat

• •

Chec k Flow rator & Seat or Replac e Flow rator

♦

He atin g Cycle Only (He at Pum p)

S-115

• •

•

• •

Tes t Compres s or Ef f icienc y

• •

Tes t Compres s or Ef f icienc y

• •

♦

Replac e V alv e

S-104

S-104

S-110

•

Remov e Restriction or Replac e Ex pansion Dev ice S-110

•

Replac e V alv e

Replac e V alv e

•

•

Tighten Bulb Brac ket

Chec k V alv e Operation

S-105

S-110

Tighten Bolts

S-21, 122

S-24

S-25

S-111

31

SERVICING TABLE OF CONTENTS

S-1 CHECKING VOLTAGE ................................................ 33

S-2 CHECKING WIRING ................................................... 33

S-3E CTK0*** COMFORTNETTM THERMOSTAT .............. 33

S-4 CHECKING TRANSFORMER

AND CONTROL CIRCUIT ...................................... 46

S-6 CHECKING TIME DELAY RELAY ............................... 46

S-8A CHECKING UNITARY (UC) CONTROL

COMPRESSOR CONTACTOR/RELAY

CONTACTS ............................................................. 47

S-9 CHECKING HIGH AND LOW VOLTAGE

TO ECM MOTOR..........................................................47

S-10A COPELAND COMFORT ALERT™ .............................. 47

S-12 CHECKING HIGH PRESSURE CONTROL ............... 61

S-13 CHECKING LOW PRESSURE CONTROL ................ 61

S-14 CHECKING HIGH AND LOW PRESSURE SWITCH

VOLTAGE ................................................................. 61

S-15 CHECKING CAPACITOR ........................................... 61

S-15A RESISTANCE CHECK USING A DIGITAL

MULTI-METER ......................................................... 61

S-15B CAPACITANCE CHECK USING A DIGITAL

MULTI-METER (IN CAPACITANCE MODE) ............. 62

S-16G CHECKING EMERSON ULTRATECH™

ECM MOTORS ........................................................ 62

S-16H ECM CFM ADJUSTMENTS AVPTC/MBVC ................. 65

S-17 CHECKING COMPRESSOR ..................................... 73

S-17A RESISTANCE TEST ................................................... 73

S-17B GROUND TEST ......................................................... 73

S-17C UNLOADER TEST PROCEDURE ............................ 74

S-17D OPERATION TEST .................................................... 74

S-18 TESTING CRANKCASE HEATER

(OPTIONAL ITEM) ................................................... 75

S-21 CHECKING REVERSING VALVE

AND SOLENOID ..................................................... 75

S-24 TESTING DEFROST CONTROL ................................ 75

S-26 TESTING TEMPERATURE SENSORS

(COMFORTNET READY MODELS ONLY) ............. 76

S-40A AVPTC/MBVC ELECTRONIC

BLOWER/HEATER CONTROL ............................... 76

S-60 ELECTRIC HEATER (OPTIONAL ITEM) .................... 81

S-61A CHECKING HEATER LIMIT CONTROL(S) ................ 82

S-61B CHECKING HEATER FUSE LINK .............................. 82

(OPTIONAL ELECTRIC HEATERS) ....................... 82

S-62 CHECKING HEATER ELEMENTS ............................. 82

S-100 REFRIGERATION REPAIR PRACTICE ..................... 82

S-101 LEAK TESTING

(NITROGEN OR NITROGEN-TRACED) ................ 83

S-102 EVACUATION ............................................................. 83

S-103 CHARGING ................................................................. 84

S-104 CHECKING COMPRESSOR EFFICIENCY ................ 85

S-106 OVERFEEDING .......................................................... 85

S-107 UNDERFEEDING ....................................................... 85

S-108 SUPERHEAT .............................................................. 85

S-109 CHECKING SUBCOOLING ........................................ 85

S-110 CHECKING EXPANSION VALVE OPERATION .......... 86

S-112 CHECKING RESTRICTED LIQUID LINE .................. 86

S-113 OVERCHARGE OF REFRIGERANT .......................... 86

S-114 NON-CONDENSABLES ............................................. 86

S-115 COMPRESSOR BURNOUT ....................................... 89

S-120 REFRIGERANT PIPING ............................................. 87

S-203 SINGLE PIECE AIR HANDLER EXTERNAL

STATIC PRESSURE ............................................ 90

S-203A TWO PIECE AIR HANDLER EXTERNAL

STATIC PRESSURE ............................................ 90

32

SERVICING

S-1 CHECKING VOLTAGE

1. Remove outer case, control panel cover, etc., from unit being tested.

With power ON:

NOTE:

When operating electric heaters on voltages other than 240 volts, refer to the System Operation section on electric heaters to calculate temperature rise and air flow.

Low voltage may cause insufficient heating.

S-2 CHECKING WIRING

WARNING

Line Voltage now present.

2. Using a voltmeter, measure the voltage across terminals

L1 and L2 of the contactor for the condensing unit or at the field connections for the air handler or heaters.

ComfortNet TM Ready Condensing Units:

Measure the voltage across the L1 and L2 lugs on the unitary (UC) control.

3. No reading - indicates open wiring, open fuse(s) no power or etc., from unit to fused disconnect service. Repair as needed.

4. With ample voltage at line voltage connectors, energize the unit.

5. Measure the voltage with the unit starting and operating, and determine the unit Locked Rotor Voltage.

NOTE

: If checking heaters, be sure all heating elements are energized.

Locked Rotor Voltage

is the actual voltage available at the compressor during starting, locked rotor, or a stalled condition. Measured voltage should be above minimum listed in chart below.

To measure Locked Rotor Voltage attach a voltmeter to the run "R" and common "C" terminals of the compressor, or to the T

1

and T

2

terminals of the contactor. Start the unit and allow the compressor to run for several seconds, then shut down the unit. Immediately attempt to restart the unit while measuring the Locked Rotor Voltage.

ComfortNet Ready Condensing Units:

To measure the

Locked Rotor Voltage, attach a voltmeter to the run "R" and common "C" terminals of the compressor or across the "R" and "C" lugs on the unitary (UC) control. Start the unit and allow the compressor to run for several seconds, then shut down the unit. Immediately attempt to restart the unit while measuring the Locked Rotor Voltage.

6. Locked rotor voltage should read within the voltage tabulation as shown. If the voltage falls below the minimum voltage, check the line wire size. Long runs of undersized wire can cause low voltage. If wire size is adequate, notify the local power company in regard to either low or high voltage.

Unit Supply Voltage

Voltage Min.

208/230

460

197

414

Max

253

506

HIGH VOLTAGE!

Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

1. Check wiring visually for signs of overheating, damaged insulation and loose connections.

2. Use an ohmmeter to check continuity of any suspected open wires.

3. If any wires must be replaced, replace with comparable gauge and insulation thickness.

S-3E CTK0*** COMFORTNET

TM

THERMOSTAT

COMFORTNET™ SYSTEM

The ComfortNet system (or CT system) is a system that includes a ComfortNet compatible air handler/furnace/modular blower and air conditioner or heat pump with a CTK0* thermostat. Any other system configurations are considered invalid ComfortNet systems and must be connected as a tradition (or legacy) system. The table below compares the valid CT systems.

CT compatible Air Handler or

Modular Blower

CT compatible

Air Conditioner

Full CT system benefits & features

CT compatible Air Handler or

Modular Blower

CT compatible

Heat Pump

Full CT system benefits & features

A ComfortNet heating/air conditioning system differs from a legacy/traditional system in the manner in which the indoor unit, outdoor unit and thermostat interact with one another. In a traditional system, the thermostat sends commands to the indoor and outdoor units via analog 24 VAC signals. It is a one-way communication path in that the indoor and outdoor units typically do not return information to the thermostat.

On the other hand, the indoor unit, outdoor unit, and thermostat comprising a ComfortNet system “communicate” digitally with one another. It is now a two-way communications path. The thermostat still sends commands to the indoor and outdoor units. However, the thermostat may also request and receive information from both the indoor and outdoor units.

This information may be displayed on the CT thermostat. The indoor and outdoor units also interact with one another. The outdoor unit may send commands to or request information from the indoor unit. This two-way digital communications

33

SERVICING

between the thermostat and subsystems (indoor/outdoor unit) and between subsystems is the key to unlocking the benefits and features of the ComfortNet system.

Two-way digital communications is accomplished using only two wires. The thermostat and subsystem controls are powered with 24 VAC Thus, a maximum of 4 wires between the equipment and thermostat is all that is required to operate the system.

1

2 R

C CTK0*

Thermostat

AIRFLOW CONSIDERATIONS

Airflow demands are managed differently in a fully communicating system than they are in a legacy wired system. The system operating mode (as determined by the thermostat) determines which unit calculates the system airflow demand.

If the indoor unit is responsible for determining the airflow demand, it calculates the demand and sends it to the ECM motor. If the outdoor unit or thermostat is responsible for determining the demand, it calculates the demand and transmits the demand along with a fan request to the indoor unit. The indoor unit then sends the demand to the ECM motor. The following table lists the various ComfortNet™ systems, the operating mode, and airflow demand source.

For example, assume the system is an air conditioner matched with an air handler. With a call for low stage cooling, the air conditioner will calculate the system’s low stage cooling airflow demand. The air conditioner will then send a fan request along with the low stage cooling airflow demand to the air handler. Once received, the air handler will send the low stage cooling airflow demand to the ECM motor. The

ECM motor then delivers the low stage cooling airflow. The table below lists the nominal high and low stage airflow for the

ComfortNet air conditioners and heat pumps.

CTK 01/ 02 T

WO

-W

IRE

O

UTDOOR

, F

OUR

-W

IRE

I

NDOOR

W

IRING

T

WO WIRES

OUTDOOR

1 2 R C

1 2 R C

System Wiring Using Four-Wires

ONLY

UNITS

MAY

. F

OR

BE

CT™ Compatible

Modular Blower

Integrated Control Module

CT™ Compatible AC/HP


UTILIZED

THIS WIRING

BETWEEN

SCHEME

,

THE

ONLY

INDOOR

THE DATA

LINES

, 1

AND

2,

ARE REQUIRED BETWEEN THE INDOOR AND

OUTDOOR UNITS

. A 40VA, 208/230 VAC

TO

24 VAC

AND

TRANSFORMER MUST BE INSTALLED IN THE OUTDOOR UNIT TO

PROVIDE

24 VAC

POWER TO THE OUTDOOR UNIT

’

S ELEC

-

TRONIC CONTROL

. T

HE TRANSFORMER IS INCLUDED WITH THE

CTK0*

KIT

. S

EE KIT INSTRUCTIONS FOR MOUNTING AND

WIRING INSTRUCTIONS

. F

OUR WIRES ARE REQUIRED BETWEEN

THE INDOOR UNIT AND THERMOSTAT

.

Models

*SZC160241

*SZC160361

*SZC160481

*SZC160601

*SZC180361

*SZC180481

*SZC180601

High

800

1200

1550

1800

1250

1750

1750

Cooling

Low

600

800

1100

1210

850

1210

1210

High

800

1200

1550

1800

1250

1750

1750

Heating

Low

600

800

1100

1210

850

1210

1210

1

2 R

C CTK0*

Thermostat

40VA Transformer (included in

CTK0*** kit)

1 2 R C

1 2

R C

CT Compatible

Modular Blower


CT Compatible

AC/HP Integrated

Control Module

208/230 VAC

24 VAC

CTK0* WIRING

A removable plug connector is provided with the control to make thermostat wire connections. This plug may be removed, wire connections made to the plug, and replaced. It is strongly recommended that multiple wires into a single terminal be twisted together prior to inserting into the plug connector. Failure to do so may result in intermittent operation. Typical 18 AWG thermostat wire may be used to wire the system components. However, communications reliability may be improved by using a high quality, shielded, twisted pair cable for the data transmission lines. In either case, 100 feet is the maximum length of wire between indoor unit and outdoor unit, or between indoor unit and thermostat.

34

System Wiring using Two-Wires between Furnace and AC/

HP and Four-Wires between Furnace and Thermostat

SERVICING

1

2 R

C CTK0*

Thermostat

1

2 R

C CTK0*

Thermostat


CTK0*** kit)

1 2 R C

1 2 R C

CT Compatible

Modular Blower


CT Compatible

AC/HP Integrated

Control Module

208/230 VAC 24 VAC


CTK0*** kit)

1 2 R C

1 2

R C

CT Compatible

Modular Blower


CT Compatible

AC/HP Integrated

Control Module

208/230 VAC

24 VAC

System Wiring Using Three-Wires between Air Handler and AC / HP and Four Wires between Air Handler and Thermostat System Wiring Using Two-Wires between Air Handler and AC / HP and Four Wires between Air Handler and Thermostat

RECOMMENDED CTK 03/04 WIRING SCHEME:

Three wires should be utilized between the indoor and outdoor units. For this wiring scheme, two wires for the data lines, 1 and 2 are required and a wire connecting the common “C” terminals between the indoor and outdoor units. This connects both commons to the same ground potential allowing for better communication. A 40VA, 208/230 VAC to 24 VAC transformer

must be installed

in the outdoor unit to provide

24 VAC power to the outdoor unit’s electronic control. The transformer is included with the CTK0* kit. See kit instructions for mounting and wiring instructions. Four wires are required between the indoor unit and thermostat.

C

OMFORT

N

ET

™ S

YSTEM

A

DVANCED

F

EATURES

The ComfortNet™ system permits access to additional system information, advanced setup features, and advanced diagnostic/troubleshooting features. These advanced features are organized into a menu structure. Refer to the

Installation and Start-Up instructions shipped with your particular CTKO*** thermostat.

ALTERNATE CTK 03/04 WIRING SCHEME:

Two wires may be utilized between the indoor and outdoor units. For this wiring scheme, only the data lines, 1 and 2, are required between the indoor and outdoor units. A 40VA,

208/230 VAC to 24 VAC transformer must be installed in the outdoor unit to provide 24 VAC power to the outdoor unit’s electronic control. The “C” 24v common of the outdoor transformer should be grounded to the equipment (earth) ground. Not as secure as the third wire but it insures there is not a floating “C” 24v common. The transformer is included with the CTK0* kit. See kit instructions for mounting and wiring instructions. Four wires are required between the indoor unit and thermostat.

35

SERVICING

Diagnostics

Accessing the air handler’s diagnostics menu provides ready access to the last six faults detected by the air handler.

Faults are stored most recent to least recent. Any consecutively repeated fault is stored a maximum of three times.

Example: A clogged return air filter causes the air handler’s motor to repeatedly enter a limiting condition. The control will only store this fault the first three consecutive times the fault occurs.

troubleshoot the network may arise. The integrated air handler control has some on-board tools that may be used to troubleshoot the network. These tools are: red communications LED, green receive (Rx) LED, and learn button. Refer to the Communications Troubleshooting Chart and Air Handler

Diagnostic Codes below for error codes, possible causes and corrective actionS.

• Red communications LED – Indicates the status of the network. The table below indicates the LED status and the corresponding potential problem.

NOTE:

It is highly recommended that the fault history be cleared after performing maintenance or servicing the air handler.

• Green receive communication LED – Indicates network traffic. The table below indicates the LED status and the corresponding potential problem.

Network Troubleshooting

The ComfortNet™ system is a fully communicating system, and thus, constitutes a network. Occasionally the need to

• Learn button – Used to reset the network. Depress the button for approximately 2 seconds to reset the network.

C

OMMUNICATIONS

T

ROUBLESHOOTING

C

HART

Possible Causes Corrective Action(s) Notes & Cautions LED LED Indication

Status

Off

1 Flash x

Normal condition x

Communications

Failure

Red

Communications

LED

2 Flashes x Out-of-box reset

Green Receive

LED

Off

1 Steady

Flash x

No power x

Communications error x

No network found

Rapid

Flashing x

Normal network traffic

On Solid x

Data 1/ Data 2 miss-wire x

None x

Communications

Failure x

None x

Depress Learn Button x

Verify that bus BIAS and TERM dipswitches are in the

ON position. x

None x

Depress once quickly for a powerup reset x

Depress and hold for 2 seconds for an out-of-box reset x None x Control power up x Learn button depressed x

No power to air handler x Open fuse x Communications error x x

Broken/ disconnected data wire(s)

Air handler is installed as a noncommunicating/ traditional system x None x

Check fuses and circuit breakers; replace/reset x Replace blown fuse x

Check for shorts in low voltage wiring in air handler/system x Reset network by depressing learn button x Check data 1/ data 2 voltages x

Check communications wiring (data 1/ data 2 wires) x

Check wire connections at terminal block x

Verify air handler installation type (noncommunicating/ traditional or communicating) x Check data 1/ data 2 voltages x

None x

Control is “talking” on network as expected x

Data 1 and data 2 wires reversed at air handler, thermostat, or ComfortNet™ compatible outdoor

AC/HP x

Short between data 1 and data 2 wires x Short between data 1 or data 2 wires and R

(24VAC) or C (24VAC common) x x

Check communications wiring (data 1/ data 2 wires) x Check wire connections at terminal block

Check data 1/ data 2 voltages x x x x x x x

Turn power OFF prior to repair


Verify wires at terminal blocks are securely twisted together prior to inserting into terminal block

Verify data1 and data voltages as described above

None

Turn power OFF prior to repair x Verify wires at terminal blocks are securely twisted together prior to inserting into terminal block

Verify data1 and data voltages as described above

36

SERVICING

7 SEGMENT LED

(characters will alternate)

DES CRIPTION OF CONDITION b4 b5 b6 b7 b9

FH

F

H1

H2

C1

C2

P1

P2 h1 h2

FC dF

(no display)

On

Ec

E5

EF d0 d1 d4 b0 b1 b2 b3

INTERNAL CONTROL FAULT / NO POWER

STANDBY, WAITING FOR INPUTS

HEATER KIT TOO LARGE, TOO SMALL, OR NO MATCH

FUSE OPEN

AUXILIARY SWITCH OPEN

DATA NOT ON NETWORK

INVALID DATA ON NETWORK

INVALID MEMORY CARD DATA

BLOWER MOTOR NOT RUNNING

BLOWER MOTOR COMMUNICATION ERROR

BLOWER MOTOR HP MISMATCH

BLOWER MOTOR OPERATING IN POWER, TEMP., OR SPEED

LIMIT

BLOWER MOTOR CURRENT TRIP OR LOST ROTOR

BLOWER MOTOR ROTOR LOCKED

OVER/UNDER VOLTAGE TRIP OR OVER TEMPERATURE TRIP

INCOMPLETE PARAMETER SENT TO MOTOR

LOW INDOOR AIRFLOW

LOW STAGE COOL - LEGACY MODE ONLY

HIGH STAGE COOL - LEGACY MODE ONLY

LOW STAGE HEAT PUMP HEAT - LEGACY MODE ONLY

HIGH STAGE HEAT PUMP HEAT - LEGACY MODE ONLY

EMERGENCY HEAT LOW - COMMUNICATING MODE ONLY

EMERGENCY HEAT HIGH - COMMUNICATING MODE ONLY

FAN COOL - COMMUNICATING MODE ONLY

FAN HEAT - COMMUNICATING MODE ONLY

FAN ONLY

ELECTRIC HEAT LOW

ELECTRIC HEAT HIGH

DEFROST - COMMUNICATING MODE ONLY

(Note: defrost is displayed as H1 in a legacy setup)

GREEN CFM LED - EACH FLASH REP RESENTS 100CFM (USE FOR AIRFLOW APPROXIMATION

ONLY) - EXAMPLE: 8 FLASHES = 800CFM

0140A00070-A

37

SERVICING

PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES

38

SERVICING


39

SERVICING


40

SERVICING


41

SERVICING

PCBJA104 AIR HANDLER DIAGNOSTIC CODES

42

SERVICING


43

SERVICING


44

SERVICING


45

SERVICING

S-4 CHECKING TRANSFORMER AND CON-

TROL CIRCUIT

3. Using an ohmmeter, check for continuity across terminals 3 and 1, and 4 and 5.

4. Apply 24 volts to terminals H1 and H2. Check for continuity across other terminals - should test continuous. If not as above - replace.

NOTE:

The time delay for the contacts to make will be approximately 20 to 50 seconds and to open after the coil is de-energized is approximately 40 to 90 seconds.

HIGH VOLTAGE!


A step-down transformer (208/240 volt primary to 24 volt secondary) is provided with each indoor unit. This allows ample capacity for use with resistance heaters. The outdoor sections do not contain a transformer (see note below).

NOTE:

ComfortNet

TM

ready condensing units may have an optional 240VAC to 24VAC transformer installed. This transformer provides 24VAC power to the unitary (UC) control in some communicating system installation scenarios.

OHMMETER

TESTING COIL CIRCUIT

WARNING

Disconnect ALL power before servicing.

1. Remove control panel cover, or etc., to gain access to transformer.

With power ON:

S-8A CHECKING UNITARY (UC) CONTROL

COMPRESSOR CONTACTOR/RELAY

CONTACTS

WARNING


WARNING


1. Connect voltmeter to lugs (L2) and (C).

2. With power ON, provide a call for cool or heat pump to energize the on-board compressor contactor/relay.

2. Using a voltmeter, check voltage across secondary voltage side of transformer (R to C).

3. No voltage indicates faulty transformer, bad wiring, or bad splices.

4. Check transformer primary voltage at incoming line voltage connections and/or splices.

5 If line voltage available at primary voltage side of transformer and wiring and splices good, transformer is inoperative. Replace.

S-6 CHECKING TIME DELAY RELAY

Time delays are used in electric heaters to sequence in multiple electric heaters.

WARNING


WARNING


3. Measure voltage across on-board compressor contactor/ relay contacts.

A. No voltage indicates the contacts are closed and the contactor/relay is functioning properly.

B. A reading of approximately half of the supply voltage

(example: 115VAC for 230VAC) indicates the relay is open. Replace UC control if relay does not close.

NOTE: The unitary (UC) control has a built-in short cycle delay. Ensure short cycle delay has elapsed before making voltage measurements.

1. Tag and disconnect all wires from male spade connections of relay.

2. Using an ohmmeter, measure the resistance across terminals H1 and H2. Should read approximately 150 ohms.

46

SERVICING

S-9 CHECKING HIGH AND LOW VOLTAGE TO

ECM MOTOR

CHECKING RELAY CONTACTS - PSC FAN MOTOR

HIGH VOLTAGE!


HIGH VOLTAGE!


1.

Measure voltage between black and brown motor leads. This should measure 208/230 volts depending on your power supply.

2.

If voltage is present proceed to check fan relay contacts and voltage.

CHECKING FAN RELAY CONTACTS - ECM FAN MOTOR

1.

Disconnect fan motor harness from plug on the UC board.

2.

Energize the system in low stage and check voltage:

•

Pin 5(Blue wire) to Pin 3(Yellow wire) =

24VAC

3.

Energize the system in high stage and check voltage:

•

Pin 5(Blue wire) to Pin 3(Yellow wire) =

24VAC

•

Pin 5(Blue wire) to Pin 1(White wire) = 24

VAC.

1. Disconnect the motor leads from 6-circuit fan motor wire harness.

2. Connect a voltmeter between circuit 3 and circuits 2 (low speed) or 1 (high speed).

NOTE:

Circuit 3 is connected directly to L2.

3. Energize the system at low or high stage.

WARNING


4. The measured voltage between circuit 3 and circuits 2 or

1 should be approximately 0VAC, which indicates the relay contacts are closed. A voltage measurement of approximately 115VAC indicates the relay is open. Replace the control if the relay checks open when it should be closed.

S-10A

COPELAND COMFORT ALERT

TM

-

UNITARY (UC) CONTROL DIAGNOSTICS

Applies to ASXC, ASZC, and DSZC 2-stage models

HIGH VOLTAGE!


4.

If voltage is present at these pins plug harness into plug on PC board and check voltages at motor to test for broken wires.

5.

If all voltages are present motor is defective and needs to be replaced.

The Copeland Comfort Alert

TM

diagnostics are fully integrated into the unitary (UC) control. The UC control and integraged

Comfort Alert™ diagnostics provide around-the-clock monitoring for common electrical problems, compressor defects and broad system faults. If a problem is detected, LED indicators flash the proper alert codes to help you quickly pinpoint the problem.

The diagnostic tables on following pages provide detailed information regarding the system symptons, indicators (LED and thermostat), potential problem(s), and corrective actions. The diagnostic information applies to systems wired as 24VAC traditional (legacy) systems and systems wired as communicating systems with the CTK0* communicating thermostat.

47

SERVICING

PCBHR101-103

PBBGR101-102

48

SERVICING

PCBHR101-103

PBBGR101-102

49

SERVICING

PCBHR101-103

PBBGR101-102

50

SERVICING

PCBHR101-103

PBBGR101-102

51

SERVICING

PCBHR101-103

PBBGR101-102

52

SERVICING

PCBHR104

d d d d d

H

L

E

F d

E

L

L

L

L

P

P

P

P

P

7 SEGMENT LED

(DS2)

0

0

0

0

0

0

0

7 SEGMENT LED

(DS1)

n

1

1

2

2

3

4

C d d b

C

C

0

8

A

A b

0

0

0

0

2

F t

9

3

1

9

8

2

3

0

7

8

5

6

E

0

1

2

3

5 t

4

E

8

1

2

6

7

8

3

1

2

0 d

DESCRIPTION OF CONDITION

Standby

Low Pressure CO Trip

Low Side Fault

High Pressure CO Trip

High Side Fault

Short Cy cling

Locked Rotor

Open Circuit

Open Start Circuit

Open Run Circuit

No Line Voltage

Low Pilot Voltage

Pow er Up

Outdoor Air Temp Sensor Fault

Outdoor Coil Temp Sensor Fault *

No Indoor Airflow

Inadequate Airf low

Cool Mode Short Cycle Timer

Low Cool

High Cool

Def rost *

Max Defrost Time *

Forced Defrost *

Data not yet on Netw ork

Invalid Data on Netw ork

System Mis-Match

Conf iguration Mis-Match

Invalid Memory Card Data

Board Misoperation

Open Fus e

Field Test Mode

High Line Voltage

LPCO Lockout (3 Trips)

HPCO Lockout (3 Trips)

Open Start Circuit Lockout

Open Run Circuit Lockout

Low Line Voltage

Heat Mode Short Cycle Timer *

Low Heat *

High Heat *

Comp Protector Open

Pump Dow n

* CODE USED ON HEAT PUMP MODELS ONLY

NOTE 1: DS1, DS2 AND DS3 ARE LABELED ON THE CONTROL ABOVE EACH 7

SEGMENT LED DISPLAY

NOTE 2: 7 SEGMENT LED DISPLAY DS3 IS NOT USED

0140M00407-A

53

SERVICING

PCBHR104

3934%-42/5",%3(//4).'

3YMPTOMSOF

!BNORMAL/PERATION

,EGACY#OMFORT.ET

4HERMOSTAT

$IAGNOSTIC3TATUS

,%$$ISPLAY#ODES

$IGIT

s Integrated control module diagnostic/status

LED display shows the indicated code. s#OMFORT.ETTHERMOSTAT displays ‘---‘ in the temperature display area.

",!.+

$IGIT $IGIT

A 2

A 3 s Heat pump fails to operate in heating mode. s Integrated control module diagnostic/status

LED display shows the indicated code.

s#OMFORT.ETTHERMOSTAT displays error message.

",!.+

E 5 s Air conditioner/heat pump fails to operate. s Integrated control module diagnostic/status


",!.+ s Air conditioner/heat pump fails to operate.

s Integrated control module diagnostic/status


",!.+ E E s Air conditioner/heat pump fails to operate. s

Integrated control module diagnostic/status

LED display shows the indicated code. s#OMFORT.ETTHERMOSTAT displays error message.

",!.+ b 0 s Outdoor air temp sensor fault s Outdoor coil temp sensor fault s Open fuse s Board misoperation s

5.)4!29$)!'./34)##/$%3

&AULT

$ESCRIPTION

Circulator blower motor is not running when it should be running.

#OMFORT.ET

4-

4HERMOSTAT/NLY

-ESSAGE #ODE

AIR

3%.3/2

FLT

COIL

3%.3/2

FLT

",/7.

FUSE

).4%2.!,

FAULT

MOTOR

./425.

A2

E5

EE b0

0OSSIBLE

#AUSES

s Short in low voltage wiring. s Compressor relay contacts welded.

#ORRECTIVE

!CTIONS

s Shorted sensor. s

Open sensor. s Sensor disconnected. s Sensor out of range.

s Check sensor connection. s Replace open/ shorted sensor.

A3 s Shorted sensor s Open sensor. s Sensor. disconnected. s Sensor out of range.

s Check sensor connection.

s Replace open/ shorted sensor. s Locate and correct short in low voltage wiring.

.OTES

#AUTIONS

s Turn power OFF prior to repair.

s Replace with correct replacement part.

s Turn power OFF prior to repair. s Replace with correct replacement part.


s Replace fuse with

3-amp automotive type. s Replace control.

s Turn power OFF prior to repair s Replace with correct replacement part.

s

Air conditioner/heat pump operates at reduced performance. s Air conditioner/heat pump operating at low stage when expected to operate at high stage. s Integrated control module diagnostic/status


",!.+ b 9 s

Airflow is lower than demanded

LOW ID

AIRFLOW b9 s Indoor blower motor problem. s

Communications error between indoor and outdoor unit.

s Check indoor blower motor. s

Check indoor blower motor wiring. s Check indoor unit control. s Repair/ replace any faulty wiring. s Repair/ replace indoor blower motor or control. s Turn power OFF prior to repair. s

Applies only to fully communicating system

USING#OMFORT.ET thermostat. s

Replace with correct replacement part. s

Indoor blower motor problem s

Blocked filters.

s Restrictive/ undersized ductwork s Indoor/ outdoor unit miss-match.

s s

Check indoor blower motor.

Check filters; clean/replace as needed. s Check ductwork; resize as needed. s Verify indoor and outdoor units are s

Turn power OFF prior to repair. s


USING#OMFORT.ET thermostat. s Replace with correct replacement part. See specification sheet(s) properly matched.

for airflow requirements and maximum external static pressure. s See specification sheets for approved system matches.

54

SERVICING

PCBHR104

3YMPTOMSOF



4HERMOSTAT

s

Air conditioner/heat pump fails to operate. s





,%$$ISPLAY#ODES

$IGIT

",!.+

$IGIT

d

$IGIT

0

5.)4!29$)!'./34)##/$%3

&AULT

$ESCRIPTION

s

Data not yet

ON.ETWORK

#OMFORT.ET

4-

4HERMOSTAT/NLY

-ESSAGE

./.%4

DATA

#ODE

d0 s Air conditioner/heat pump fails to operate. s Integrated control module diagnostic/status


",!.+ s Air conditioner/heat pump fails to operate. s Air conditioner/heat pump operating at reduced performance. s

Air conditioner/heat pump operating at low stage when expected to operate at high stage.

s




",!.+ d d

1

2 s Invalid Data

ON.ETWORK

).6!,)$

DATA s System

Mis-Match

).6!,)$

SYSTEM d1 d2

0OSSIBLE

#AUSES

#ORRECTIVE

!CTIONS

.OTES

#AUTIONS

s

Air conditioner/ heat pump is s

Verify system type wired as part of a communicating

(communicating or legacy) system and integrated control s

Populate shared data using module does not contain any shared data. memory card s Wire system as legacy system s


Use memory card for your specific model. s

Insert memory card

BEFORE turning power

/.-EMORYCARDMAY be removed after data is loaded. Turn power

OFF before removing memory card. s Error code will be cleared once data is loaded.


USING#OMFORT.ET thermostat.

s Air conditioner/ heat pump is wired as part of a communicating system and integrated control module contains invalid shared data or network data is invalid for the integrated control module. s Verify system type s Turn power OFF prior to repair. s

(communicating or legacy).

Populate correct shared data using memory card. s Use memory card for your specific model. s Insert memory card


/.-EMORYCARDMAY s

Wire system as legacy system. be removed after data is loaded. Turn power

OFF before removing memory card. s

Error code will be cleared once data is loaded.



s Air conditioner/ heat pump is wired as part of a communicating system and outdoor unit requires airflow greater than indoor unit’s airflow capability.

s Shared data is incompatible with the system or missing parameters.

s Verify system type

(communicating or legacy).

s

Verify shared data is correct for your specific model; repopulate data if required.

s

Wire system as legacy system.


s Use memory card for your specific model.

s Insert memory card



OFF before removing memory card. s

Error code will be cleared once data is loaded.



55

SERVICING PCBHR104

3YMPTOMSOF



4HERMOSTAT


,%$$ISPLAY#ODES

$IGIT

s

Air conditioner/heat pump fails to operate. s

Integrated control module diagnostic/status LED display shows the indicated code. s#OMFORT.ETTHERMOSTAT displays error message.

",!.+

$IGIT

d

$IGIT

3

5.)4!29$)!'./34)##/$%3

&AULT

$ESCRIPTION

s

Configuration

Mis-match

#OMFORT.ET

4-

4HERMOSTAT/NLY

-ESSAGE

).6!,)$

#/.&)'

#ODE

d3 s Air conditioner/heat pump fails to operate. s Integrated control module diagnostic/status


",!.+ s

Very long run time.

s Four consecutive compressor protector trips with average run time between trips greater than 3 hours.

s Compressor operating at high speed and outdoor fan operating at low speed s



",!.+ s Compressor and outdoor fan are off. s Thermostat demand is present. s Integrated control module diagnostic/status


",!.+ d

0

0

4

1

1 s Invalid

Memory

Card Data s

Low Side

Fault

).6!,)$

MC DATA

LOW SIDE

FAULT s Low Pressure

Cut Out Trip

,03/0%.

d4

01

01

0OSSIBLE

#AUSES

#ORRECTIVE

!CTIONS

s

Shared data sent to integrated s

Verify system type control module does not match hardware configuration.

(communicating or legacy). s

Verify shared data is correct for your specific model; repopulate data if required. s Wire system as legacy system.

.OTES

#AUTIONS

s Shared data on memory card has s s s s been rejected.

Low refrigerant charge.

Restriction in liquid line.

Indoor blower motor failure.

Indoor thermostat set extremely low. s Verify system type

(communicating or legacy). s Verify shared data is correct for your specific model; repopulate data if required. s

Wire system as legacy system.

s Turn power OFF prior to repair. s Use memory card for your specific model. s Insert memory card



OFF before removing memory card. s Error code will be cleared once data is loaded. s

Verify refrigerant charge; adjust as needed. s Check for restricted liquid line; repair/ replace as s s s

Turn power OFF prior to repair.

Fault will clear after 30 consecutive normal cycles.

Fault may be cleared by cycling 24VAC to needed.

s Check indoor blower motor; repair/replace as needed. s Check indoor thermostat setting. control. s Replace with correct replacement part(s). s Low refrigerant charge. s Restriction in liquid line. s Indoor blower motor failure. s Indoor thermostat set extremely low. s


Use memory card for your specific model. s

Insert memory card



OFF before removing memory card. s Error code will be cleared once data is loaded.


USING#OMFORT.ET thermostat. s Verify refrigerant charge; adjust as needed. s Check for restricted liquid line; repair/ replace as needed.

s Check indoor blower motor; repair/replace as needed. s

Check low pressure switch; repair/replace as needed. s

Check indoor thermostat setting. s Turn power OFF prior to repair. s Replace with correct replacement part(s).

56

SERVICING

PCBHR104

f

Compressor and outdoor f .

Low pressure switch trip 3 times within same thermostat demand.

Thermostat demand is present.


LED display shows the indicated code. displays error message.

Digit 3 Digit 2 Digit 1

L 1

Four consecutive compressor protector trips with average run time between trips greater than

1 minute and less than 15 minutes.

Low pressure and high pressure switches are closed.



Compressor and outdoor

.



LED display shows the indicated code. f


.

Low pressure switch trip 3 times within same thermostat demand.




0

0

L

2

2

2

Low Pressure

Cut Out

Lockout

(3 Trips)

High Side

Fault

High

Pressure

Cut Out

Trip

High

Pressure

Cut Out

Lockout

(3 Trips)

LPS

HIGH SIDE

FAULT

HPS

01

02

02

02

Low refrigerant charge.

Restriction in liquid line.

Indoor blower motor failure.

Indoor thermostat set extremely low.

Blocked condenser coil.

Outdoor fan not running.





Verify refrigerant charge; adjust as needed.

Check for restricted liquid line; repair/replace as needed.

Check indoor blower motor; repair/replace as needed.

Check low pressure switch; repair/replace as needed.

Check indoor thermostat setting.


Must clear fault by cycling 24VAC to control.

Replace with correct replacement part(s).

Check and clean condenser coil.

Check outdoor fan motor; repair/ replace as needed.

Check outdoor fan motor wiring; repair/replace as needed.

Check outdoor fan motor capacitor; replace as needed.



Fault may be cleared by cycling 24VAC to control.















57

SERVICING PCBHR104

Run time for last 4 cycles is less than 3 minutes each.

Compressor protector has not tripped.





0 3 Short Cycling CMPR

SHRT

CYCLE


Compressor protector trips four consecutive times.

Average run time between trips is less than 15 seconds.



displays error message.

f

Compressor and outdoor or greater than

4 hours.





f


.





0

0

0

4

5

6

Locked Rotor

ROTOR

Open Circuit

CIRCUIT

Open Start

Circuit START

03

04

05

06

Intermittent thermostat demand.

Faulty compressor relay.

Compressor bearings are seized.

Failed compressor run capacitor.

Faulty run capacitor wiring.

Low line voltage.

Power is disconnected.

Failed compressor protector.

Compressor not properly wired to control.

Check thermostat and thermostat wiring; repair/ replace as needed.

Check compressor relay operation; replace control as needed.





Minimum compressor runt time is changed from 30 seconds to 3 minutes.

Check compressor operation; repair/ replace as needed.

Check run capacitor; replace as needed.

Check wiring; repair/replace as needed.

Verify line voltage is within range on rating plate; contact local utility is out of range.




Check circuit breakers and fuses.

Check wiring to unit; repair/ replace as needed.

Check compressor; repair/replace as needed

Check compressor wiring; repair/ replace as needed.


Fault will clear after 1 normal cycle.



Compressor start winding is open.




Faulty compressor wiring.

Check compressor; repair/replace as needed.






Replace will correct replacement part(s).

58

SERVICING

PCBHR104

f


.


Open start circuit has been detected 4 times with 5 minute delay between each detection.




f


.







Open run circuit has been detected 4 times with 5 minute delay between each detection.



Air conditioner/heat pump may appear to be operating normally.

Compressor protector may be open (compressor and outdoor f




L 6

0

L

L

7

7

8

Open Start

Circuit

Lockout

Open Run

Circuit

Open Run

Circuit

Lockout

Low Line

Voltage

START

VOLT

06 Compressor start winding is open.







Check wiring repair/replaced as needed.




07 Compressor run winding is open.







Fault may be cycling

24VAC to control.


07 Compressor run winding is open.








08 Low line voltage.

Check circuit breakers and fuses.

Verify unit is connected to power supply rating plate.

Correct low line voltage condition; contact local utility if needed.


Control detects line voltage less than

185 VAC.

Fault will clear if line voltage increases above 185 VAC.

59

SERVICING

PCBHR104








Integrated control

. module diagnostic/status



H 8

0

P

9

0

High Line

Voltage

Low Pilot

Voltage

Comp

Protector

Open





0 8

VOLT

08 High line voltage

Correct high line voltage condition; contact local utility if needed.

Verify unit is connected to power on rating plate.


Control detects line voltage greater than

255 VAC.

Fault will clear if line voltage decreases below 255 VAC.

LOW

VOLT

VOLTAGE

09 Control detects secondary voltage less than 18 VAC.

Transformer overloaded.

Low line voltage.

Check fuse.

Correct low secondary voltage condition.

Check transformer; replace if needed. displayed displayed through run or start windings.

Compressor run winding is open.






Check wiring; repair/ replace as needed.


08 Check circuit breaker and fuses.

Verify unit is connected to power on rating plate.


Fault will clear if secondary voltage rises above 21VAC.







Control detects line voltage less than

185 VAC.

Fault will clear if line voltage increases above 185 VAC.

60

SERVICING

S-12 CHECKING HIGH PRESSURE CONTROL

WARNING


mately 50 PSIG for heat pumps and 95 PSIG for air conditioners.

Test for continuity using a VOM and if not as above, replace the control.

HIGH VOLTAGE!


S-14 CHECKING HIGH AND LOW PRESSURE

SWITCH VOLTAGE

The HPC and LPC are wired in series so output at both switches should be the same when switches are closed voltage reading should be 6.5vdc or 8.0vac.

NOTE:

the

Discharge Thermostat is wired in series with the HPC if DT is open you will read input voltage on the HPC and no voltage on the output of HPC or LPC.

The high pressure control capillary senses the pressure in the compressor discharge line. If abnormally high condensing pressures develop, the contacts of the control open, breaking the control circuit before the compressor motor overloads. This control is automatically reset.

1. Using an ohmmeter, check across terminals of high pressure control, with wire removed. If not continuous, the contacts are open.

2. Attach a gauge to the dill valve port on the base valve.

With power ON:

3. Start the system and place a piece of cardboard in front of the condenser coil, raising the condensing pressure.

4. Check pressure at which the high pressure control cutsout. If it cuts-out at 610 PSIG ± 10 PSIG, it is operating normally (See causes for high head pressure in Service

Problem Analysis Guide). If it cuts out below this pressure range, replace the control.

S-15 CHECKING CAPACITOR

CAPACITOR, RUN

A run capacitor is wired across the auxiliary and main windings of a single phase permanent split capacitor motor.

The capacitors primary function is to reduce the line current while greatly improving the torque characteristics of a motor.

This is accomplished by using the 90° phase relationship between the capacitor current and voltage in conjunction with the motor windings, so that the motor will give two phase operation when connected to a single phase circuit. The capacitor also reduces the line current to the motor by improving the power factor.

The line side of this capacitor is marked with "COM" and is wired to the line side of the circuit.

S-15A RESISTANCE CHECK USING A DIGITAL

MULTI-METER

HIGH VOLTAGE!


S-13 CHECKING LOW PRESSURE CONTROL

The low pressure control senses the pressure in the suction line and will open its contacts on a drop in pressure. The low pressure control will automatically reset itself with a rise in pressure.

The low pressure control is designed to cut-out (open) at approximately 21 PSIG for heat pumps and 55 PSIG for air conditioners. It will automatically cut-in (close) at approxi-

Check for Digital Test

1. Set the meter on Ohm range (Set it at lease 1000 Ohm

=1k).

WARNING

Discharge capacitor through a 20 to 30 OHM resistor before handling.

2. Connect the Meter leads to the Capacitor terminals.

3. Digital meter will show a reading momentarily (Figure 1).

Note the reading.

61

SERVICING

4. If the reading is near to the actual value of the capacitor

(i.e. the printed value on the capacitor). The capacitor is good. (Note that the reading may be less than the actual printed value of the capacitor).

5. If you read a significantly lower capacitance or none at all, then capacitor is dead and must be replaced.

Figure 1 Figure 2

4. Reading will immediately return to the OL = (Open Line)

(Figure 2). Every attempt of Step 2 will show the same result as was in step 4 and Step 5. This indicates that the capacitor is good.

5. If there is no Change, then capacitor is dead and must be replaced.

Check for Analog Meter

A. Good Condition - indicator swings to zero and slowly returns to infinity. (Start capacitor with bleed resistor will not return to infinity. It will still read the resistance of the resistor).

B. Shorted - indicator swings to zero and stops there replace.

C. Open - no reading - replace. (Start capacitor would read resistor resistance.)

S-15B CAPACITANCE CHECK USING A DIGI-

TAL MULTI-METER (IN CAPACITANCE

MODE)

WARNING

Discharge capacitor through a 20 to 30 OHM resistor before handling.

NOTE

:

You can do this test with a multi-meter if you have a Capacitance meter on your multi-meter.

1. Remove the capacitor from the circuit.

2. Now Select "Capacitance" on your multi-meter.

3. Now connect the capacitor terminals to the multi-meter leads.

S-16G CHECKING EMERSON ULTRATECH

TM

ECM MOTORS

DESCRIPTION

The AVPTC and MBVC models utilize an Emerson, 4-wire variable speed ECM blower motor. The ECM blower motor provides constant CFM.

The motor is a serially communicating variable speed motor.

Only four wires are required to control the motor: +Vdc,

Common, Receive, and Transmit.

The +Vdc and Common wires provide power to the motor's low voltage control circuits. Typical supply voltage is 9-15 volts DC.

GENERAL CHECKS/CONSIDERATIONS

1. Check power supply to the air handler or modular blower.

Ensure power supply is within the range specified on rating plate. See section S-1.

2. Check motor power harness. Ensure wires are continuous and make good contact when seated in the connectors. Repair or replace as needed.

3. Check motor control harness. Ensure wires are continuous and make good contact when seated in the connectors. Repair or replace as needed.

4. Check thermostat and thermostat wiring. Ensure thermostat is providing proper cooling/heating/continuous fan demands. Repair or replace as needed.

5. Check blower wheel. Confirm wheel is properly seated on motor shaft. Set screw must be on shaft flat and torqued to 165 in-lbs minimum. Confirm wheel has no broken or loose blades. Repair or replace as needed.

6. Ensure motor and wheel turn freely. Check for interference between wheel and housing or wheel and motor.

Repair or replace as needed.

7. Check housing for cracks and/or corrosion. Repair or replace as needed.

62

SERVICING

8. Check motor mounting bracket. Ensure mouting bracket is tightly secured to the housing. Ensure bracket is not cracked or broken.

Emerson UltraCheck-EZ

TM

Diagnostic Tool

The Emerson UltraCheck-EZ

TM

diaganostic tool may be used to diagnose the ECM motor.

HIGH VOLTAGE!


WARNING


P o w e r

Bu tto n

O F F

O N

O N

O N

O N

G re e n

L ED

M o to r

Actio n

In d ica tio n (s)

O F F

O F F

B link ing

O F F

Not

Rotating

B link ing Rotating

Rotating

Not

Rotating

Not

Rotating

Confirm 24V A C to

UltraChec k -E Z

TM

tool.

If 24V A C is c onfirm ed, diagnos tic tool is inoperable.

M otor and c ontrol/end bell are func tioning properly .

Replac e m otor c ontrol/end bell.

Chec k m otor (s ee

Motor Chec k s

below).

Replac e m otor c ontrol/end bell; verify m otor (s ee

Motor

Chec k s

below).

To use the diagnostic tool, perform the following steps:

1. Disconnect power to the air handler.

2. Disconnect the 4-circuit control harness from the motor.

3. Plug the 4-circuit connector from the diagnostic tool into the motor control connector.

4. Connect one alligator clip from the diagnostic tool to a ground source.

5. Connect the other alligator clip to a 24VAC source.

NOTE:

The alligator clips are NOT polarized.

NOTE:

The UltraCheck-EZ

TM

diagnostic tool is equipped with a nonreplaceable fuse. Connecting the tool to a source other than 24VAC could damage the tool and cause the fuse to open. Doing so will render the diagnostic tool inoperable.

6. Turn on power to air handler or modular blower.

9. Depress the orange power button to turn off motor.

10. Disconnect power. Disconnect diagnostic tool.

11. Reconnect the 4-wire harness from control board to motor.

Electrical Checks - High Voltage Power Circuits

HIGH VOLTAGE!


7. Depress the orange power button on the diagnostic tool to send a run signal to the motor. Allow up to 5 seconds for the motor to start.

NOTE:

If the orange power button does not illuminate when depressed, the tool either has an open fuse or is not properly connected to a 24VAC source.

8. The green LED on the diagnostic tool will blink indicating communications between the tool and motor. See table below for indications of tool indicators and motor actions.

Replace or repair as needed.

1. Disconnect power to air handler or modular blower.

2. Disconnect the 5-circuit power connector to the ECM motor.

3. Turn on power to air handler or modular.

WARNING


4. Measure voltage between pins 4 and 5 on the 5-circuit connector. Measured voltage should be the same as the supply voltage to the air handler or modular.

63

SERVICING

3

4

5

1

2

}

Lines 1 and 2 will be connected for 12OVAC Power Connector applications only

Gnd

AC Line Connection

AC Line Connection

3. Remove the blower assembly from the air handler or modular blower.

4. Remove the (3) screws securing the control/end bell to the motor. Separate the control/end bell. Disconnect the 3-circuit harness from the control/end bell to remove the control/end bell from the motor.

5. Inspect the NTC thermistor inside the control/end bell

(see figure below). Replace control/end bell if thermistor is cracked or broken.

5. Measure voltage between pins 4 and 3. Voltage should be approximately half of the voltage measured in step 4.

6. Measure voltage between pins 5 and 3. Voltage should be approximately half of the voltage measured in step 4.

7. If no voltage is present, check supply voltage to air handler or modular blower. See section S-1.


Reconnect the 5-circuit power harness disconnected in step 2.

Electrical Checks - Low Voltage Control Circuits


WARNING


2. Check voltage between pins on the 4-wire motor control harness between themotor and control board.

3. Voltage on pins should read:

Pins 1 to 4 = 5.0vdc




Motor Control/End Bell Checks

6. Inspect the large capacitors inside the control/end bell

(see figure below). Replace the control/end bell if any of the capacitors are bulging or swollen.

HIGH VOLTAGE!



NOTE:

Motor contains capacitors that can hold a charge for several minutes after disconnecting power. Wait 5 minutes after removing power to allow capacitors to discharge.

2. Disconnect the motor control harness and motor power harness.

7. Locate the 3-circuit connector in the control/end bell.

Using an ohmmeter, check the resistance between each terminal in the connector. If the resistance is 100

Ω

or greater, the control/end bell is functioning properly.

Replace the control/end bell if the resistance is lower than 100

Ω

.

8. Reassemble motor and control/end bell in reverse of disassembly. Replace blower assembly into air handler or modular blower.

64

SERVICING

Motor Checks

HIGH VOLTAGE!



NOTE:

Motor contains capacitors that can hold a charge for several minutes after disconnecting power. Wait 5 minutes after removing power to allow capacitors to discharge.

2. Disassemble motor as described in steps 2 through 4 above.

3. Locate the 3-circuit harness from the motor. Using an ohmmeter, measure the resistance between each motor phase winding. The resistance levels should be equal.

Replace the motor if the resistance levels are unequal, open circuited or short circuited.

4. Measure the resistance between each motor phase winding and the motor shell. Replace the motor if any phase winding is short circuited to the motor shell.

5. Reassemble motor and control/end bell in reverse of disassembly. Replace blower assembly into air handler or modular blower.

Cooling Airflow Speed Tap (* indicates factory setting)

Airflow Adjust Dipswitches

- Used to adjust the airflow +/-

10%

Tap A

1

2

OFF ON

Tap B

1

2

OFF ON

Tap C

1

2

OFF ON

Tap D*

1

2

OFF ON

Normal*

OFF ON

+10%

OFF ON

- 10%

OFF ON

Normal

OFF ON

3

4

3

4

3

4

3

4

Airflow Adjust Taps (* indicates factory sett ing)

Ramping Profile Dipswitches

- Used to select a comfort profile for the cooling mode.

Tap A*

5

6

OFF ON

Tap B

5

6

OFF ON

Tap C

5

6

OFF ON

Tap D

5

6

OFF ON

S-16H ECM CFM ADJUSTMENTS AVPTC/MBVC

This section references the operation characteristics of the

AVPTC/MBVC models. The MBVC models utilize an integrated air handler control. The air handler control provides ECM blower motor control and includes all dipswitches necessary to set up the cooling, heat pump and electric airflow characteristics.

The control has three banks of dipswitches: a bank for cooling airflow and trim adjustment, a bank for selecting one of (4) enhancement profiles and enabling dehumidification, and a bank for selecting the installed electric heater kit size.

Adjustments are made by selecting the appropriate ON/

OFF combinations of the dipswitches. The dipswitches along with their functions are shown in the figures below.

Cooling Airflow Dipswitches

- Used to set the desired cooling airflow

Cooling Airflow Ramping Profiles (* indicates factory setting)

Dehumidification Disable/Enable Dipswitch

- Reduces cooling airflow by ~ 15% when enabled AND when used with a humidistat (such as DEHUM1). Airflow is reduced when a call for cooling is present and the humidistat is open.

OFF ON

7

8

DEHUM

Unused

Move to the ON position to enable dehumidification

Electric Heater Airflow

- Airflow for installed electric heaters is set by adjusting the dipswitches to the appropriate heater size.

65

SERVICING

21 kW*

9

10

OFF ON

11

20 kW 15 kW 10 kW

9

10

11

OFF ON

9

10

11

OFF ON

9

10

11

OFF ON

Electric Heating Airflow (* indicates factory setting)

8 kW

OFF ON

9

10

11

6 kW

9

10

OFF ON

11

5 kW

3 kW

9

10

OFF ON

9

10

OFF ON

11

11

Electric Heating Airflow (* indicates factory setting)

The table on the following page indicates the airflow that corresponds to the available dipswitch settings.

66

SERVICING

MBVC Airflow Table

Speed Selection Dip Switches

Cool Adjust Profile

Selection Selection Selection

Switches Switches Switches

TAP 1 2 3 4 5 6

A OFF OFF OFF OFF OFF OFF

B ON OFF ON OFF ON OFF

C OFF ON OFF ON OFF ON

D ON ON ON ON ON ON

Profiles Pre-Run Short-Run OFF Delay

A ------- -------- 60 sec/100%

B ------- 30 sec/50% 60 sec/100%

C ------- 7.5 min/82% 60 sec/100%

D 30 sec/50% 7.5 min/82% 30 sec/50% high stage cooling airflow. Determine the cooresponding tap

( A, B, C, or D ). Set dip switches 1 and 2 to the appropriate

ON / OFF positions. (2) Select model and installed electric heater size. Set switches 9, 10, and 11 to the appropriate

ON/OFF positions. (3) Select the airflow adjustment factor tap

A and D are 0%; Tap B is +10%; Tap C - 10%. Set dip switches 3 and 4 to the appropriate ON / OFF positions.

(see profiles above). Set switches 5 and 6 to the approriate

ON / OFF positions.

0140A00045

Htr Kw 9 10 11 MBVC1200* MBVC16000* MBVC2000*

3 ON ON ON 600 800 800

5 ON ON OFF 600 800 800

6 ON OFF ON 635 800 800

8 ON OFF OFF 740 1000 1000

10 OFF ON ON 1000 1000 1200

15 OFF ON OFF 1400 1500 1500

20 OFF OFF ON NR NR 2000

Model Tap Low Stage High Stage

Cool Cool

A 400 600

B 540 800

C 670 1000

D 800 1200

A 670 1000

B 800 1200

C 940 1400

D 1070 1600

A 800 1200

B 1070 1600

C 1200 1800

D 1340 2000

67

BLOWER PERFORMANCE DATA

HTR kW

3

5

6

8

10

15

20

21

^ Factory setting

MBVC1200* MBVC1600* MBVC2000*

600

600

635

740

1000

1400

NR

NR

800

800

800

1000

1000

1500

NR

NR

800

800

800

1000

1200

1500

2000

NR

SWITCH

9

ON

ON

ON

ON

OFF

OFF

OFF

ON^

SWITCH

10

ON

ON

OFF

OFF

ON

ON

OFF

ON^

SWITCH

11

ON

OFF

ON

OFF

ON

OFF

ON

ON^

MODEL

MBVC1200

MBVC1600

MBVC2000

^ Factory setting

LOW STAGE

COOL

HIGH STAGE

COOL

400

540

670

800

670

800

940

1070

800

1070

1200

1340

600

800

1000

1200

1000

1200

1400

1600

1200

1600

1800

2000

1

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

COOL SELECTION

SWITCHES

2

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

3

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

ADJUST SELECTION

SWITCHES

4

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

5

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

PROFILE SELECTION

SWITCHES

6

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

Locate the blower speed selection DIP switches on the integrated control module. Select the desired “cooling” speed tap by positioning switches 1 and 2 appropriately. Select the desired "adjust" tap by positioning switches

3 and 4 appropriatly. Refer to the following

Dipswitches - Cooling Airflow and Airflow Adjust Taps

figure for switch positions and their corresponding taps. Verify CFM by counting the number of times the green CFM LED blinks.

Normal*

OFF ON

+10%

OFF ON

-10%

OFF ON

Normal

OFF ON

3

4

3

4

3

4

3

4

Air flow Adjust Taps (*indicates factory setting)

Dip Switches - Cooling Airflow and

Airflow Adjust Taps

Thermostat "Fan Only" Mode

During"Fan Only" operations, the CFM output is 30% of the maximum CFM capability.

CFM Trim Adjust

Minor adjustments can be made through the dipswitch combination of 3-4.

68

SERVICING

S p ee d S ele c tion D ip S witc h es

T ap

A

B

C

D

C oo l

S ele ction

S witc h es

1

O FF

O N

O FF

O N

2

O FF

O FF

O N

O N

T R IM

0 %

+ 1 0%

- 10 %

0 %

Ad ju st

S elec tio n

S w it che s

3

O FF

O N

O FF

O N

4

O F F

O F F

ON

ON

TO SET A IRF L OW :

1 .Se l e ct a pp r o pr iate m o de l fr o m C o ol in g/H ea t P um p A i rfl ow T a b l e.

Ba s e d o n d e s ir ed A i rfl ow f o r y o ur ap pli ca ti o n sel e ct c o r re s p on d i n g tap

(A ,B,C or D) . Se t d ip s wi tch e s 1 & 2 to th e ap p r op ri a te ON /O FF

po si tio n s.

2 . S el e ct a p pr o p r ia te Air flo w ad j u stm e n t facto r fo r a p pli ca tio n

(0 %. + 1 0 %, -1 0% ) . Se t di p sw itc he s 3 & 4 to the a pp ro pr ia te ON /OF F

po si tio n s.

3 .

If in sta l led w it h He a te r K it:

U si n g El ectr ic H e at Air fl o w T a ble , se t di p sw it che s 9 , 1 0 an d 11 t o the

a pp r o pri ate O N/O FF p o s iti o ns ba se d o n H ea te r k it i n stal le d.

If in s tal le d w ith o ut H e ater K it:

En s u re d ip s wi tch e s 9, 10 a nd 1 1 are s e t to a v ali d h ea te r ki t sel ecti on .

Exa m p le : T h e on ly va l id h e at e r k its fo r AV PT C 18 30 1 4* ap pl ic atio n s

ar e 3 , 5, 6, 8 a nd 1 0 kW .

Fa ilu re to do so w il l r es ult i n a H ea te r K it er r o r c o de .

TO SET C OM F OR T M OD E:

Se le ct d es ir ed C o m fo r t M o de p r o fil e (s ee p r ofil e s a bo ve) . Se t s wi tche s

5 an d 6 to th e ap prop ri a te ON /OF F po si tio n s.

Profile

Selection

Switches

Profiles

A

B

C

D

Pre-Run

-------

-------

Short-Run

-------

Off Delay

60 sec/100%

30 sec/50% 60 sec/100%

------7.5 mins/82% 60 sec/100%

30 sec/50% 7.5 mins/82% 30 sec/50%

5

ON

6

OFF OFF

ON OFF

OFF ON

ON

AVPTC Airflow Table

Cooling/Heat Pump Airflow Table

Model

AVPTC183014*

AVPTC313714*

AVPTC426014*

Tap

A

B

C

A

B

C

D

D

A

B

C

Low

Stage

Cool

420

560

700

410

560

700

830

810

940

1050

1210

NOTE: Airflow data shown applies to non-communicating mode operation only. For a fully communicating system, please see the outdoor unit's installation instructions for cooling and heat pump airflow data.

See ComfortNet™ System - Airflow Consideration section for details.

High

Stage

Cool

630

840

1040

610

830

1040

1240

1210

1410

1560

1800

Electric Heat Airflow Table

Htr kW

8

10

15

20

3

5

6

21

9

ON

ON

ON

ON

OFF

OFF

OFF

OFF

10

ON

ON

OFF

OFF

ON

ON

OFF

OFF

11

ON

OFF

ON

OFF

ON

OFF

ON

OFF

AVPTC

183014*

630

730

840

1080

1270

NR

NR

NR

AVPTC

313714*

610

710

840

1060

1260

1470

NR

NR

NOTE: Airflow data shown applies to the emergency heat mode (electric heat only) in either noncommunicating mode operation or fully communicating mode operation.

AVPTC

426014*

600

680

790

990

1190

1390

1580

1580

NOTE:

When 8kW and 10kW heat kits are used with an

AVPTC1830 and AVPTC313, matched with 2-ton outdoor unit, see Note 1below.

1 Set Heater Kit dip switches 9, 10 and 11 to 6kW setting

(9-ON, 10-OFF, 11-ON) to obtain 840 CFM.

69

SERVICING

Speed Selection Dip Switches

Cool Adjust Profile



TAP S1 S2 S3 S4 S5 S6



ON

OFF


D ON ON ON ON ON ON

ON

Continuous

Fan

Speed

S12

OFF

S13

OFF

OFF

ON

ON

Profiles Pre-Run Short-Run OFF Delay

A ------- -------- 60 sec/100%

B ------- 30 sec/50% 60 sec/100%

C ------- 7.5 min/82% 60 sec/100%

D 30 sec/50% 7.5 min/82% 30 sec/50%

To set Airflow:

(1) Select model and desired High Stage Cooling

Airflow. Determine the corresponding tap (A, B, C, D). Set dip switches S1 and S2 to the appropriate ON / OFF positions.

(2) Select model and installed electric heater size. Set dip switches S9, S10, and S11 to the appropriate ON / OFF positions.

(3) If airflow adjustment is required set Trim Enable Switch

S8

to

ON (OFF = 0% Trim) and set S3 and S4 to appropriate ON / OFF positions. Tap A is +5%,Tap B is -5%, Tap C is +10%, Tap D is

-10%.

To Set Comfort mode:

Select desired Comfort Mode Profile (see profiles above). Set dip switches S5 and S6 to appropriate ON /

OFF positions.

Dehumidification:

To enable, set dip switch S7 to ON. Cooling airflow will be reduced to 85% of nominal value during cool call when Dehum command is present. To disable, set S7 to OFF.

Continuous Fan Speed:

Use dip switches S12 and S13 to select one of 4 continuous fan speeds, Tap A is 25%. Tap B is 50%, Tap

C is 75%, Tap D is 100%.

Notes:

1. Airflow data shown applies to legacy mode operation only.

For a fully communicating system, please see the outdoor

unit's installation instructions for cooling and heat pump

airflow data. See

ComfortNet System-Airflow Consideration

section for details.

2. Airflow blink codes are approximations of actual airflow.

Model

Cooling/Heat Pump Airflow Table

AVPTC24B14**

AVPTC30C14**

AVPTC36C14**

AVPTC48C14**

AVPTC42D14**

AVPTC48D14**

AVPTC60D14**

Speed tap

Low stage

(CFM)

410

565

660

765

440

605

740

885

500

700

930

1120

500

700

930

1120

560

763

994

1225

900

1035

1140

1200

1210

1365

1450

1525

D

A

B

C

B

C

D

A

D

A

B

C

A

B

C

D

A

B

C

B

C

D

A

B

C

D

A

D

High stage

(CFM)

610

835

970

1125

610

835

1020

1225

725

1000

1330

1600

725

1000

1330

1600

800

1090

1420

1750

1350

1550

1700

1800

1610

1815

1920

2025

NOTE:

Airflow blink codes are approximations of actual airflow. Airflows provided are at 0.3 static.

70

SERVICING

READY 15 AVPTC AIRFLOW TABLES

Speed Selection Dip Switches

Cool Adjust Profile



TAP S1 S2 S3 S4 S5 S6


Continuous

Fan

Speed

S12

OFF

S13

OFF



ON

OFF

D ON ON ON ON ON ON

ON

OFF

ON

ON

Profiles Pre-Run Short-Run OFF Delay

A ------- -------- 60 sec/100%

B ------- 30 sec/50% 60 sec/100%

C ------- 7.5 min/82% 60 sec/100%

D 30 sec/50% 7.5 min/82% 30 sec/50%

To set Airflow:

(1) Select model and desired High Stage Cooling

Airflow. Determine the corresponding tap (A, B, C, D). Set dip switches S1 and S2 to the appropriate ON / OFF positions.

(2) Select model and installed electric heater size. Set dip switches S9, S10, and S11 to the appropriate ON / OFF positions.

(3) If airflow adjustment is required set Trim Enable Switch

S8

to

ON (OFF = 0% Trim) and set S3 and S4 to appropriate ON / OFF positions. Tap A is +5%,Tap B is -5%, Tap C is +10%, Tap D is

-10%.

To Set Comfort mode:

Select desired Comfort Mode Profile (see profiles above). Set dip switches S5 and S6 to appropriate ON /

OFF positions.

Dehumidification:

To enable, set dip switch S7 to ON. Cooling airflow will be reduced to 85% of nominal value during cool call when Dehum command is present. To disable, set S7 to OFF.

Continuous Fan Speed:

Use dip switches S12 and S13 to select one of 4 continuous fan speeds, Tap A is 25%. Tap B is 50%, Tap

C is 75%, Tap D is 100%.

Notes:

1. Airflow data shown applies to legacy mode operation only.

For a fully communicating system, please see the outdoor

unit's installation instructions for cooling and heat pump

airflow data. See

ComfortNet System-Airflow Consideration

section for details.

2. Airflow blink codes are approximations of actual airflow.

DIP SWITCH SETTING & AIRFLOW TABLE FOR ELECTRIC HEAT

HTR KW S9 S10 S11

AVPTC25B14 AVPTC29B14

AVPTC37B14

AVPTC31C14

AVPTC37C14

AVPTC59C14 AVPTC37D14 AVPTC59D14 AVPTC49D14

ƚƚ

AVPTC61D14

ƚƚƚ

3

5

6

8

10

15

ON

ON

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

ON

OFF

ON

OFF

ON

OFF

550

650

700

800

850

875

550

650

700

800

875

875

550

650

700

800

875

1050

850

900

1000

1170

1345

1345

1170

1170

1170

1170

1345

1345

1240

1240

1240

1240

1520

1240

1240

1240

1240

1520

19*

20

21

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

1520 1520

25* OFF OFF OFF

Note: Airflow data shown applies to the electric heat only in either legacy mode or communicating mode operation

* Within thermostat user menu CTK0* communicating thermostat will display 20KW for OFF- OFF- ON dip switch selection,

21kW for OFF-OFF-OFF dip swith selection.

NR - Not Rated

†† For match up with a 3 ton outdoor unit:

Airflow for 5 kW up to 15 kW heater kits shall be set to 1300 cfm speed tap of ON-OFF-ON.

††† For match up with a 3.5 ton outdoor unit: Heater kit applica Ɵ on shall not exceed 20 kW.

Airflow for 5 kW up to 20 kW heater kits shall be set to 1500 cfm speed tap of ON-OFF-OFF.

1250

1300

1500

1550

1720

1250

1300

1500

1550

1780

1850

1850

Cooling/Heat Pump Airflow Table

MODEL

Tap Low Stage High Stage

A 445 650

AVPTC25B14

B

C

D

600

690

745

855

980

1085

AVPTC29B14 AVPTC37B14

AVPTC31C14 AVPTC37C14

AVPTC59C14

AVPTC37D14

AVPTC59D14

AVPTC49D14

AVPTC61D14

C

D

A

B

C

D

A

B

C

D

A

B

C

D

A

B

C

D

A

B

C

D

A

B

C

D

A

B

1040

1260

1330

1395

820

895

995

1056

1080

1210

1280

1350

610

810

940

1070

605

725

820

940

590

705

845

910

375

545

630

740

1445

1790

1890

1990

1195

1320

1460

1530

1630

1820

1925

2025

875

1225

1410

1595

900

1080

1225

1405

610

795

930

1085

880

1055

1265

1360

71

SERVICING

ELECTRIC HEAT AIRFLOW TABLE

Htr kW

3

5

6

8

10

15

19*

9 10 11 AVPTC24B14A* AVPTC30C14A* AVPTC36C14A* AVPTC48C14*

ON ON ON

550 600

NR NR

ON ON OFF

ON OFF ON

ON OFF OFF

650

700

800

700

750

875

850

900

1000

850

900

1000

OFF ON ON

OFF ON OFF

OFF OFF ON

20

21 or 25*

OFF OFF OFF

850

NR

NR

NR

NR

950

NR

NR

NR

NR

1200

1440

1500

1500

NR

1200

1440

1500

1500

NR

AVPTC42D14A*

+

AVPTC48D14A*

++

850**

1250

1300

1500

NR

1250

1300

1500

1550

1720

NR

1800

NR

1550

1720

NR

1815

1850

AVPTC60D14A*

+++

NR

1250

1300

1500

1550

1780

NR

1850

1850

NOTE:

Airflow data shown applies to the electric heat only in either legacy mode or communicating mode operation.

* Within thermostat user menu, CTK0* communicating thermostat will display 20 kW for OFF-OFF-ON dip switch selection and

21 kW for OFF- OFF-OFF dip switch selection.

NR- Not rated

+ For match up with a 2 ton outdoor unit: Heater kit application shall not exceed 10 kW.

Airflow for 5 kW up to 10 kW heater kits shall be set to 850 cfm speed tap of ON-ON-ON.

++

For match up with a 3 ton outdoor unit: Heater kit application shall not exceed 15 kW.

Airflow for 5 kW up to 15 kW heater kits shall be set to 1300 cfm speed tap of ON-OFF-ON.

+++ For match up with a 3.5 ton outdoor unit: Heater kit application shall not exceed 20 kW.

Airflow for 5 kW up to 20 kW heater kits shall be set to 1500 cfm speed tap of ON-OFF-OFF

** 3 kW heater kit is not applicable for this indoor application.

72

SERVICING

S-17 CHECKING COMPRESSOR

WARNING

Hermetic compressor electrical terminal venting can be dangerous. When insulating material which supports a hermetic compressor or electrical terminal suddenly disintegrates due to physical abuse or as a result of an electrical short between the terminal and the compressor housing, the terminal may be expelled, venting the vapor and liquid contents of the compressor housing and system.

If the compressor terminal PROTECTIVE COVER and gasket (if required) are not properly in place and secured, there is a remote possibility if a terminal vents, that the vaporous and liquid discharge can be ignited, spouting flames several feet, causing potentially severe or fatal injury to anyone in its path.

This discharge can be ignited external to the compressor if the terminal cover is not properly in place and if the discharge impinges on a sufficient heat source.

Ignition of the discharge can also occur at the venting terminal or inside the compressor, if there is sufficient contaminant air present in the system and an electrical arc occurs as the terminal vents.

Ignition cannot occur at the venting terminal without the presence of contaminant air, and cannot occur externally from the venting terminal without the presence of an external ignition source.

Therefore, proper evacuation of a hermetic system is essential at the time of manufacture and during servicing.

To reduce the possibility of external ignition, all open flame, electrical power, and other heat sources should be extinguished or turned off prior to servicing a system.

If the following test indicates shorted, grounded or open windings, see procedures S-19 for the next steps to be taken.

S-17A RESISTANCE TEST

Each compressor is equipped with an internal overload.

The line break internal overload senses both motor amperage and winding temperature. High motor temperature or amperage heats the disc causing it to open, breaking the common circuit within the compressor on single phase units.

Heat generated within the compressor shell, usually due to recycling of the motor, high amperage or insufficient gas to cool the motor, is slow to dissipate. Allow at least three to four hours for it to cool and reset, then retest.

Fuse, circuit breaker, ground fault protective device, etc.

has not tripped -

HIGH VOLTAGE!


1. Remove the leads from the compressor terminals.

See warnings S-17 before removing compressor terminal cover.

2. Using an ohmmeter, test continuity between terminals

S-R, C-R, and C-S, on single phase units.

C

OHMMETER

S

R

COMP

TESTING COMPRESSOR WINDINGS

If either winding does not test continuous, replace the compressor.

NOTE:

If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor.

S-17B GROUND TEST

If fuse, circuit breaker, ground fault protective device, etc., has tripped, this is a strong indication that an electrical problem exists and must be found and corrected. The circuit protective device rating must be checked, and its maximum rating should coincide with that marked on the equipment nameplate.

With the terminal protective cover in place, it is acceptable to replace the fuse or reset the circuit breaker ONE TIME

ONLY to see if it was just a nuisance opening. If it opens again, DO NOT continue to reset.

A Meghometer should not be used to determine good or bad compressors. There is not an industry recognized specification for mega ohm values for small tonnage compressors.

Scroll compressors can have the motor winding end-turns in the oil, which can produce a lower resistance reading to ground. The insulation type is the same for scroll and reciprocating compressors.

Disconnect all power to unit

, making sure that

all

power legs are open.

73

SERVICING

1. DO NOT remove protective terminal cover. Disconnect the three leads going to the compressor terminals at the nearest point to the compressor.

2. Identify the leads and using an ohmmeter on the R x

10,000 scale or the highest resistance scale on your ohmmeter check the resistance between each of the three leads separately to ground (such as an unpainted tube on the compressor).

3. If a ground is indicated, then carefully remove the compressor terminal protective cover and inspect for loose leads or insulation breaks in the lead wires.

4. If no visual problems indicated, carefully remove the leads at the compressor terminals.

5. Carefully retest for ground, directly between compressor terminals and ground.

6. If ground is indicated, replace the compressor. The resistance reading should be infinity. If there is any reading on meter, there is some continuity to ground and compressor should be considered defective.

UNLOADER SOLENOID

(Molded Plug)

OHMMETER

WARNING

Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging.

S-17C UNLOADER TEST PROCEDURE

Unloader Test Procedure with Comfort Alert™-Unitary

(UC) Control Diagnostics

If you suspected that the unloader is not working, the following methods may be used to verify operation.

1. Operate the system and measure compressor amperage. Cycle the unloader on and off at ten second intervals by appling and removing Y2 voltage to the module. Wait five seconds after power is applied to Y2 before taking a reading. An increase in compressor amperage should be observed when switching from partload to full-load and a reduction in compressor amperage should be observed when changing from full-load to partload. The percent change in current depends on the operating conditions and voltage.

2. If Step 1 does not give the expected results remove the solenoid plug from the compressor and with the unit running and the thermostat calling for Y2 to be energized test the voltage output at the plug with a dc voltmeter.

The reading should be 4 to 18 VDC for Comfort Alert. If not, unplug the harness from the module and check voltage at the "High" pins of the module. The module will not power the unloader solenoid if the compressor is not running.

3. If the correct DC voltage is at the control circuit molded plug measure the unloader coil resistance. Shut off power and remove the control circuit molded plug from the compressor and measure te unloader solenoid coil resistance. If the coil resistance is infinite, zero, or grounded, the compressor must be replaced.

S-17D OPERATION TEST

If the voltage, capacitor, overload and motor winding test fail to show the cause for failure:

HIGH VOLTAGE!


74

SERVICING

1. Remove unit wiring from disconnect switch and wire a test cord to the disconnect switch.

NOTE:

The wire size of the test cord must equal the line wire size and the fuse must be of the proper size and type.

2. With the protective terminal cover in place, use the three leads to the compressor terminals that were disconnected at the nearest point to the compressor and connect the common, start and run clips to the respective leads.

3. Connect good capacitors of the right MFD and voltage rating into the circuit as shown.

4. With power ON, close the switch.

WARNING


A. If the compressor starts and continues to run, the cause for failure is somewhere else in the system.

B. If the compressor fails to start - replace.

COPELAND COMPRESSOR

03 A 12345 L

YEA R

M ONTH

SER IAL

NUM BER

PLANT

S-18 TESTING CRANKCASE HEATER (OP-

TIONAL ITEM)

The crankcase heater must be energized a minimum of four

(4) hours before the condensing unit is operated.

Crankcase heaters are used to prevent migration or accumulation of refrigerant in the compressor crankcase during the off cycles and prevents liquid slugging or oil pumping on start up.

A crankcase heater will not prevent compressor damage due to a floodback or over charge condition.

WARNING


1. Disconnect the heater lead in wires.

2. Using an ohmmeter, check heater continuity - should test continuous. If not, replace.

NOTE:

The positive temperature coefficient crankcase heater is a 40 watt 265 voltage heater. The cool resistance of the heater will be approximately 1800 ohms. The resistance will become greater as the temperature of the compressor shell increases.

S-21 CHECKING REVERSING VALVE AND

SOLENOID

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

When 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. An increase in the suction line temperature through the reversing valve can also be measured. Check operation of the valve by starting the system and switching the operation from COOL-

ING to HEATING cycle.

If the valve fails to change its position, test the voltage (24V) at the valve coil terminals, while the system is on the

COOLING cycle.

All heat pumps and ComfortNet TM heat pumps wired in legacy

- If no voltage is registered at the coil terminals, check the operation of the thermostat and the continuity of the connecting wiring from the "O" terminal of the thermostat to the unit.

ComfortNet heat pumps only

-

Check voltage (24VAC) at the non-insulated terminal E22 on the UC control board

(RVS on silkscreen) and "C" terminal on the 7-pin or 4-pin connector on the UC control

If voltage is registered at the coil, tap the valve body lightly while switching the system from HEATING to COOLING, etc. If this fails to cause the valve to switch positions, remove the coil connector cap and test the continuity of the reversing valve solenoid coil. If the coil does not test continuous replace it.

If the coil test continuous and 24 volts is present at the coil terminals, the valve is inoperative - replace it.

S-24 TESTING DEFROST CONTROL

LEGACY MODELS:

COMFORTNET

TM

UNITS:

To check the defrost control for proper sequencing, proceed as follows: With power ON; unit not running.

1. Set thermostat to call for heating.

2. Press

TEST

and

RECALL

buttons simultaneously for approximately 3 seconds, then release them. System should go into defrost immediately.

3. Using VOM check for voltage across terminals "C & O".

Meter should read 24 volts (skip this step if system a fully communicating system)

4. Visually inspect to see that the frost is gradually melting on the coil and the compressor is running.

5. Using VOM check for voltage across "W2 & C" terminals on the board. You should read 24 volts.

6. If not as above, replace control board.

7. Set thermostat to off position and disconnect power before removing any jumpers or wires.

75

SERVICING

S-26 TESTING TEMPERATURE SENSORS

(COMFORTNET READY MODELS ONLY)

The ASXC and DSXC ComfortNet ready air conditioner models are factory equipped with an outdoor air temperature (OAT) sensor. The OAT sensor allows the outdoor air temperature to be displayed on the CTK0* thermostat when used with the ASXC and DSXC models.

The ASZC and DSZC ComfortNet ready heat pump models are equipped with both an outdoor air temperature (OAT) sensor and an outdoor coil temperature (OCT) sensor. The

OAT provides the balance point temperature in heat pump systems (air handler w/electric heat + heat pump) and dual fuel systems. The OCT sensor is provides the outdoor coil temperature and is used in determining defrost cycles.

To check either the outdoor air or outdoor coil temperature sensors:

HIGH VOLTAGE!


Features

The new air handler control includes advanced diagnostic features with fault recall, estimated CFM display via onboard LED, and ComfortNet TM ready. Diagnostics includes heater kit selection diagnostics, open fuse, internal control fault, data errors, and blower motor faults. Data errors are not included in the fault recall list. Diagnostic error codes are displayed on a single red LED.

The estimated CFM is displayed as a flashing green LED.

The LED flashes once for each 100 CFM.

The AVPTC/MBVC air handlers may be used in a fully communicating ComfortNet system when matched with a compatiable outdoor unit and the CTK0* thermostat. A fully communicating system offers advanced setup and diagnostic features.

Basic Operation

The air handler control receives thermostat inputs either from a standard 24VAC thermostat or the CTK0* ComfortNet thermostat. For cooling and heat pump operation, the control operates the variable speed blower motor at the demand as determined from the thermostat input(s). If a demand for electric heat is received, the control will provide a 24VAC output for up to two electric heat sequencers.

Troubleshooting

Motor Control Circuits

1. Disconnect power to the air conditioner or heat pump.

2. Disconnect the sensor from the unitary (UC) control.

3. Connect an ohmmeter across the sensor terminals. The ohmmeter should read be 10k

Ω

, +/-10%, at 75°F.

Replace the sensor if the sensor is open, shorted, or outside the valid resistance range.

HIGH VOLTAGE!


Ohm Reading of Communicating Outdoor Unit Sensors

T, °F RW@T T, °F RW@T T, °F RW@T T, °F RW@T T, °F RW@T

-40 336,000 5 72,940 50 19,903 95 6,530

-31 242,700 14 55,319 59 15,714 104 5,327

-22 177,000 23 42,324 68 12,493 113 4,370

140

149

158

2,488

2,083

1,752

-13 130,400 32 32,654 77 10,000 122 3,603

-4 97,060 41 25,396 86 8,056 134 2,986

167 1,480

176 1,255


WARNING


S-40A AVPTC/MBVC ELECTRONIC BLOWER/

HEATER CONTROL

Description

The AVPTC and MBVC models utilize an electronic control that provides ECM blower motor control and control of up to two electric heat sequencers. The control has thermostat inputs for up to two stages of cooling, two stages of electric heat, reversing valve, and dehumidification. Control input is

24VAC.

All dipswitches necessary to setup cooling, heat pump, and electric heat airflow are fully integrated into the control.

Dehumidification is enabled/disabled via an on-board dipswitch.

2. Check voltage between pins 1 and 4 at the 4-wire motor connector on the control board.

See Electrical Checks

- Low Voltage Control Circuits section (S-16H).

Electric Heat Sequencer Outputs

HIGH VOLTAGE!


76

SERVICING

1. Turn on power to air handler or modular blower.

WARNING


2. Disconnect the 4-circuit harness connecting the control to the electric heater kit.

3. Provide a thermostat demand for low stage auxiliary heat

(W1). Measure the voltage between circuits 1 and 3 at the on-board electric heat connector. Voltage should measure 24VAC. Replace control if no voltage is present.

NOTE:

Allow for any built-in time delays before making voltage measurements. Any electric heater faults that are present may prevent the heater output from energizing.

Verify that no heater faults are present before making voltage measurements.

4. Provide a thermostat demand for high stage auxiliary heat

(W1 + W2). Measure the voltage between circuits 1 and

3 at the on-board electric heat connector. Measure the voltage between circuits 2 and 3 at the on-board electric heat connector. Voltage should measure 24VAC. Replace control if no voltage is present.

Communications (Applies only to Systems with Compatible

ComfortNet

TM

Outdoor Unit and CTK0*Thermostat)

The integrated air handler control has some on-board tools that may be used to troubleshoot the network. These tools are: red communications LED, green receive (Rx) LED, and learn button. These are described below a. Red communications LED – Indicates the status of the network. Refer to the Network Troubleshooting Chart for the LED status and the corresponding potential problem.

b. Green receive LED – Indicates network traffic. Refer to the Network Troubleshooting Chart for the LED status and the corresponding potential problem.

c. Learn button – Used to reset the network. Depress the button for approximately 2 seconds to reset the network.

Voltages between the two data lines and between each data line and common may be used to determine if the network is operating properly.

Do the following to measure the voltages on the communications data lines.

WARNING


Data Line Voltage Troubleshooting and Bias

Switches

Proper data voltage is essential to robust and reliable communication on the ComfortNet™ system. Any wiring issues must be corrected for good communication.

•

Poor wiring connections at the terminal blocks

•

Low voltage wires that are shorted, grounded or broken.

•

Communicating wires that are not connected to the proper terminals at the connector.

•

24 volt common outside and inside are not at the same ground potential

•

Bias dip switch setting conflicts between indoor board and outdoor board.

•

It is

STRONGLY

recommended that you do not connect multiple wires into a single terminal on the wiring connector

•

Wire nuts are recommended to connect multiple wires to connector ensuring one wire is used for each terminal.

•

Failure to do so may result in intermittent operation.

•

Typical 18 AWG thermostat wire may be used to wire the system components. One hundred feet is the maximum length of wire between indoor and outdoor units or between indoor unit and thermostat.

•

When outdoor transformer is used and there at least three thermostat wires running to the outdoor unit use one of the extra wires to connect the two 24 volt commons together. This will ensure both 24 volt commons are at the same ground potential.

•

When outdoor transformer is used and there are only two thermostat wires running to the outdoor unit ground the 24 volt common “C” of the outdoor transformer to a chassis ground (earth0 ground. This is not as good as the third wire but it is better than leaving the outdoor 24 volt common floating.

If this does not resolve communication issues Bias switch issues will need to be checked

.

Note:

Only one unit should control bias on the system.

•

Air Handler or Furnace should never have their bias switches moved.

•

Indoor bias switches are always in the

“ON”

position

•

A/C and Heat Pump bias switches can be moved.

•

Thermostats do not have bias switches.

•

It may be necessary to move bias switches on the outdoor unit to achieve proper bias. If the switches need to be moved both switches must be moved.

Checking Bias Voltage:

Remove communicating wires from outdoor board and thermostat and check voltage at the indoor board.

1.

DC voltage from C to data 1 should read approximately 1.9vdc or 2.8vdc for some furnaces. (Figure 1)

2.

DC voltage from C to data 2 should read approximately 1.3vdc. or 2.2vdc for some furnaces . (Figure

2)

3.

Difference in voltage should be .6vdc.

77

SERVICING

Figure 1

Figure 2

Reconnect communicating wires from outdoor board check voltage again

1.

Check voltage from C to data 1 and C to Data 2 if the voltage is different than the original reading listed above. The outdoor bias switches must be turned to off.

2.

Turn power off at outdoor unit and unplug the low voltage connector.

3.

Remove the plastic film covering the switches with screwdriver or knife.

4.

Turn both switches to “off” position.

5.

Plug in connector and turn on power and check DC voltage between C and data 1 and C and data 2.

Difference should be .6vdc.

SEQUENCE OF OPERATION

AVPTC/MBVC with ASXC/DSXC Condenser and CTK0*

Communicating Themostat

The AVPTC or MBVC air handle/modular blower matched with an ASXC or DSXC condensing unit and CTK0* communicating thermostat constitute a network. The three components, or subsystems, making up the system communicate with one another with information passed between all three components. This leads to a somewhat non-traditional manner in which the system components receive commands for system operation. All system commands are routed from the component through the network to the appropriate destination component.

NOTE:

The individual subsystems will cease operation if the request for operation is NOT refreshed after 5 minutes. This is a built-in safe guard to prevent the possibility of runaway operation.

1.0 Cooling Operation - Low and High Stage Cool

1.1 The CTK0* thermostat sends a request for low stage cooling through the network to the unitary (UC) control in the condenser. The UC control receives the command and processes any compressor and fan delays.

1.2 The UC control sends a request for low stage fan speed to the air handler/modular blower. The blower energizes the ECM blower motor at the appropriate speed.

1.3 The condenser energizes the compressor and condenser fan motor at the appropriate low stage speeds.

1.4 The system operates at low stage cooling.

1.5 If the thermostat demand cannot be met on low stage cooling, the CTK0* thermostat sends a request for high stage cooling to the condenser. The condenser in turn sends a request for high stage fan speed to the air handler/modular blower. The blower increases the blower speed to the high stage cooling speed.

1.6 The condenser's unitary control energizes the high stage compressor solenoid and switches the condenser fan motor to high speed.

1.7 The system operates at high stage cooling.

1.8 Once the thermostat demand is satisfied, the CTK0* thermostat commands the UC control to end cooling operation. The condenser de-energizes the compressorand condenser fan motor. The UC control continues providing a fan request until any cooling blower

OFF delays have expired.

2.0 Heating Operation - Auxiliary/Emergency Heat

2.1 The CTK0* thermostat sends a request for emergency heat to the air handler/modular blower.

2.2 The air handler control energizes the ECM blower motor at the emergency heat speed. The electric heat sequencer outputs are also energized, thus energizing the electric heaters.

2.3 The system operates at emergency heat.

2.4 Once the thermostat demand is satisfied, the CTK0* thermostat commands the air handler/modular blower to end emergency heat operation. The air handler control de-energizes the electric heat sequencer outputs. The

ECM blower motor remains energized until any blower

OFF delay timing has expired.

3.0 Continuous Fan Operation

3.1 With a demand for continuous fan operation, the CTK0* thermostat sends a fan request to the integrated air

78

SERVICING

handler control along with a fan demand. The control energizes the variavble speed ECM motor at fan demand provided by the thermostat. The fan demand provided by the thermostat will be 30%, 50%,or 70% of the air handler's maximum airflow capability. The continuous fan demand is set from the thermostat as low, medium, or high.

3.2 If the thermostat demand for continuous fan is removed, the CTK0* thermostat commands the integrated air handler control to end continuous fan operation. The integrated AH control immediately de-energizes the

ECM blower motor.

AVPTC/MBVC with ASZC/DSZC Heat Pump and CTK0*

Communicating Themostat

The AVPTC or MBVC air handle/modular blower matched with an ASZC or DSZC condensing unit and CTK0* communicating thermostat constitute a network. The three components, or subsystems, making up the system communicate with one another with information passed between all three components. This leads to a somewhat non-traditional manner in which the system components receive commands for system operation. All system commands are routed from the component through the network to the appropriate destination component.

NOTE:

Communicating heat pump systems are designed to utilize a balance point temperature. The balance point temperature in part controls heat pump operation. If the outdoor temperature is below the balance point, the heat pump is disable and only electric heat is available for heating.

The balance point temperature is set via the CTK0* thermostat in the advanced installer's configuration menu.

The CTK0* thermostat also allows the user to disable the electric heaters in the air handler/modular blower depending on the outdoor temperature. The electric heaters are disabled

If the outdoor temperature is above the set point. All heating is supplied by the heat pump.

The outdoor air temperature is aquired from the outdoor air temperature (OAT) sensor included with the ASZC/DSZC heat pump models. Faults with the sensor will affect heating operation.

NOTE:

The individual subsystems will cease operation if the request for operation is NOT refreshed after 5 minutes. This is a built-in safe guard to prevent the possibility of runaway operation.

1.0 Cooling Operation - Low and High Stage Cool

1.1 The CTK0* thermostat sends a request for low stage cooling through the network to the unitary (UC) control in the heat pump. The UC control receives the command and processes any compressor and fan delays.


1.3 The heat pump energizes the compressor and condenser fan motor at the appropriate low stage speeds. The reversing valve is also energized.

1.4 The system operates at low stage cooling.

1.5 If the thermostat demand cannot be met on low stage cooling, the CTK0* thermostat sends a request for high stage cooling to the heat pump. The heat pump in turn sends a request for high stage fan speed to the air handler/modular blower. The AH control increases the blower speed to the high stage cooling speed.

1.6 The heat pump's unitary control energizes the high stage compressor solenoid and switches the condenser fan motor to high speed. The reversing valve remains energized.

1.7 The system operates at high stage cooling.

1.8 Once the thermostat demand is satisfied, the CTK0* thermostat commands the UC control to end cooling operation. The heat pump de-energizes the compressor, condenser fan motor, and reversing valve. The UC control continues providing a fan request until any cooling blower

OFF delays have expired.

2.0 Heating Operation

Outdoor Temperature Above the Heat Pump Balance

Point

2.1 The CTK0* thermostat sends a request for the outdoor air temperature to the heat pump. The heat pump returns an outdoor air temperature that is above the balance point temperature. Heat pump heating is enabled.

2.2 The CTK0* thermostat sends a request for low stage heat pump heating to the unitary (UC) control in the heat pump. The UC control receives the command and processes any compressor and fan delays.


2.4 The condenser energizes the compressor and condenser fan motor at the appropriate low stage speeds.

2.5 The system operates at low stage heat pump heating.

2.6 If the thermostat demand cannot be met on low stage heat pump heating, the CTK0* thermostat sends a request for high stage heat pump heating to the heat pump. The heat pump in turn sends a request for high stage fan speed to the air handler/modular blower. The

AH control increases the blower speed to the high stage heat pump heating speed.

2.7 The heat pump's unitary control energizes the high stage compressor solenoid and switches the condenser fan motor to high speed.

2.8 The system operates at high stage heat pump heating.

2.9 If the thermostat demand cannot be met on high stage heat pump heating, the CTK0* thermostat sends a request for auxiliary heat to the air handler/modular blower.

2.10 Upon receiving a demand for auxiliary heat, the air handler control determines the appropriate airflow for high stage heat pump + auxiliary heat operation and operates the ECM blower motor at that airflow demand.

79

SERVICING

The air handler control determines which airflow demand is greatest and applies that demand when operating the

ECM blower motor.

2.11 The system operates at high stage heat pump heating plus auxiliary heat.

2.12 Once the thermostat demand is satisfied, the CTK0* thermostat commands the heat pump to end heat pump heating operation. The compressor and outdoor fan motor are de-energized.

The air handler/modular blower is commanded to end auxiliary heat operation. The air handler control deenergizes the electric heat sequencer outputs. The ECM blower motor remains energized until any blower OFF delay timing has expired.

Outdoor Temperature Below the Heat Pump Balance

Point

2.1 The CTK0*** thermostat sends a request for the outdoor air temperature to the heat pump. The heat pump returns an outdoor air temperature that is below the balance point temperature. Heat pump heating is disabled.

2.2 The CTK0*** thermostat sends a request for auxiliary heat to the air handler/modular blower.

2.2 The air handler control energizes the ECM blower motor at the auxiliary heat speed. The electric heat sequencer outputs are also energized, thus energizing the electric heaters.

2.3 The system operates at auxiliary heat.

2.4 Once the thermostat demand is satisfied, the CTK0* thermostat commands the air handler/modular blower to end auxiliary heat operation. The air handler control deenergizes the electric heat sequencer outputs. The ECM blower motor remains energized until any blower OFF delay timing has expired.

3.0 Continuous Fan Operation

3.1 With a demand for continuous fan operation, the CTK0* thermostat sends a fan request to the integrated air handler control along with a fan demand. The controladjustable via the CTK0* thermostat. The compressor delay is intended to eliminate compressor noise during the reversing valve shift.) The compressor will energized (or re-energized) at high stage.

3.2 If the thermostat demand for continuous fan is removed, the CTK0* thermostat commands the integrated air handler control to end continuous fan operation. The integrated AH control immediately de-energizes the

ECM blower motor.

4.0 Defrost Operation

4.1 While the system is operating in heat pump heating (see

2.0 Heating Operation

), the control in the outdoor unit may determines that a defrost cycle is needed. Upon determing that a defrost cycle is needed, the UC control de-energizes the condensor fan motor and energizes the reversing valve.

4.2 The compressor may be de-energized for a short delay during the reversing valve shift. (The delay period is adjustable via the CTK0* thermostat. The compressor delay is intended to eliminate compressor noise during the reversing valve shift.) The compressor will energize

(or re-energize) at high stage.

4.3 The UC control sends a request for defrost operation to the integrated air handler control. The air handler control energizes the electric heat sequencer outputs and operates the ECM blower model at the electric heat speed.

4.4 Once the defrost cycle is terminated, the heat pump commands the air handler/modular blower to end defrost operation.

4.5 The system returns to heat pump heating operation that was in effect prior to the defrost cycle.

5.0 Emergency Heat Operation

5.1 The CTK0* thermostat sends a request for emergency heat to the air handler/modular blower.

5.2 The air handler control energizes the ECM blower motor at the emergency heat speed. The electric heat sequencer outputs are also energized, thus energizing the electric heaters.

5.3 The system operates at emergency heat.

5.4 Once the thermostat demand is satisfied, the CTK0* thermostat commands the air handler/modular blower to end emergency heat operation. The air handler control de-energizes the electric heat sequencer outputs. The

ECM blower motor remains energized until any blower

OFF delay timing has expired. energizes the variavble speed ECM motor at fan demand provided by the thermostat. The fan demand provided by the thermostat will be

30%, 50%,or 70% of the air handler's maximum airflow capability. The continuous fan demand is set from the thermostat as low, medium, or high.

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SERVICING

S-60 ELECTRIC HEATER (OPTIONAL ITEM)

Optional electric heaters may be added, in the quantities shown in the specifications section, to provide electric resistance heating. Under no condition shall more heaters than the quantity shown be installed.

The low voltage circuit in the air handler is factory wired and terminates at the location provided for the electric heater(s).

A minimum of field wiring is required to complete the installation.

Other components such as a Heating/Cooling Thermostat and Outdoor Thermostats are available to complete the installation.

The system CFM can be determined by measuring the static pressure external to the unit. The installation manual supplied with the blower coil, or the blower performance table in the service manual, shows the CFM for the static measured.

Alternately, the system CFM can be determined by operating the electric heaters and indoor blower WITHOUT having the compressor in operation. Measure the temperature rise as close to the blower inlet and outlet as possible.

If other than a 240V power supply is used, refer to the

BTUH

CAPACITY CORRECTION FACTOR

chart below.

BTUH CAPACITY CORRECTION FACTOR

SUPPLY VOLTAGE 250 230 220 208

MULTIPLICATION FACTOR 1.08

.92

.84

.75

EXAMPLE:

Five (5) heaters provide 24.0 KW at the rated

240V. Our actual measured voltage is 220V, and our measured temperature rise is 42°F. Find the actual CFM:

Answer:

24.0KW, 42°F Rise, 240 V = 1800 CFM from the

TEMPERATURE RISE

chart on the right.

Heating output at 220 V = 24.0KW x 3.413 x .84 = 68.8

MBH.

Actual CFM = 1800 x .84 Corr. Factor = 1400 CFM.

NOTE:

The temperature rise table is for sea level installations. The temperature rise at a particular KW and CFM will be greater at high altitudes, while the external static pressure at a particular CFM will be less.

1400

1500

1600

1700

1800

1900

2000

CFM

600

700

800

900

TEMP ERATURE RISE (°F) @ 240V

3.0 4.8 7.2 9.6 14.4 19.2 24.0 28.8 kW kW kW kW

16 25 38 51 kW

-

14 22 33 43 -

12 19 29 38 57

11 17 26 34 51 kW

-

-

-

-

1000 10 15 23 30 46

1100 9 14 21 27 41

-

55

1200

1300

8

7

13

12

19

18

25

23

38

35

50

46 kW

-

-

-

-

-

-

-

kW

-

-

-

-

-

-

-

-

2100

2200

2300

6

5

5

6

5

7 11 16 22 32 43 54 65

6 10 15 20 30 40 50 60

5

4

4

9 14 19 28 38 47 57

9

8

8

8

7

7

7

14

13

12

12

11

11

10

18

17

16

15

14

14

13

27

25

24

23

22

21

20

36

34

32

30

29

27

26

44

42

40

38

36

34

33

53

50

48

45

43

41

39

HTR

KW

3.0

KW

ELECTRIC HEATER CAPACITY BTUH

4.7

KW

6.0

KW

7.0

KW

9.5

KW

14.2

KW

19.5

KW

21.0

KW

BTUH 10200 16200 20400 23800 32400 48600 66500 71600

FORMULAS:

Heating Output = KW x 3413 x Corr. Factor

Actual CFM = CFM (from table) x Corr. Factor

BTUH = KW x 3413

BTUH = CFM x 1.08 x Temperature Rise (T)

CFM = KW x 3413

1.08 x T

T = BTUH

CFM x 1.08

81

SERVICING

S-61A CHECKING HEATER LIMIT CONTROL(S)

Each individual heater element is protected with a limit control device connected in series with each element to prevent overheating of components in case of low airflow. This limit control will open its circuit at approximately 150°F.

S-100 REFRIGERATION REPAIR PRACTICE

DANGER

Always remove the refrigerant charge in a proper manner before applying heat to the system.

When repairing the refrigeration system:

HIGH VOLTAGE!


S-61B CHECKING HEATER FUSE LINK

(OPTIONAL ELECTRIC HEATERS)

WARNING


S-62 CHECKING HEATER ELEMENTS

WARNING


HIGH VOLTAGE!


1. Remove the wiring from the control terminals.

2. Using an ohmmeter, test for continuity across the normally closed contacts. No reading indicates the control is open - replace if necessary.

IF FOUND OPEN - REPLACE - DO NOT WIRE AROUND.

Each individual heater element is protected with a one time fuse link which is connected in series with the element. The fuse link will open at approximately 333°.

1. Remove heater element assembly so as to expose fuse link.

2. Using an ohmmeter, test across the fuse link for continuity - no reading indicates the link is open. Replace as necessary.

NOTE:

The link is designed to open at approximately 333°F.

DO NOT WIRE AROUND - determine reason for failure.

1. Disassemble and remove the heating element.

2. Visually inspect the heater assembly for any breaks in the wire or broken insulators.

3. Using an ohmmeter, test the element for continuity - no reading indicates the element is open. Replace as necessary.

1. Never open a system that is under vacuum. Air and moisture will be drawn in.

2. Plug or cap all openings.

3. Remove all burrs and clean the brazing surfaces of the tubing with sand cloth or paper. Brazing materials do not flow well on oxidized or oily surfaces.

4. Clean the inside of all new tubing to remove oils and pipe chips.

5. When brazing, sweep the tubing with dry nitrogen to prevent the formation of oxides on the inside surfaces.

6. Complete any repair by replacing the liquid line drier in the system, evacuate and charge.

BRAZING MATERIALS

I

MPORTANT NOTE:

Torch heat required to braze tubes of various sizes is proportional to the size of the tube. Tubes of smaller size require less heat to bring the tube to brazing temperature before adding brazing alloy. Applying too much heat to any tube can melt the tube. Service personnel must use the appropriate heat level for the size of the tube being brazed.

NOTE:

The use of a heat shield when brazing is recommended to avoid burning the serial plate or the finish on the unit. Heat trap or wet rags should be used to protect heat sensitive components such as service valves and TXV valves.

Copper to Copper Joints

- Sil-Fos used without flux (alloy of 15% silver, 80% copper, and 5% phosphorous). Recommended heat 1400°F.

Copper to Steel Joints

- Silver Solder used without a flux

(alloy of 30% silver, 38% copper, 32% zinc). Recommended heat - 1200°F.

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SERVICING

S-101 LEAK TESTING (NITROGEN OR NITRO-

GEN-TRACED)

WARNING

To avoid the risk of fire or explosion, never use oxygen, high pressure air or flammable gases for leak testing of a refrigeration system.

WARNING

To avoid possible explosion, the line from the nitrogen cylinder must include a pressure regulator and a pressure relief valve. The pressure relief valve must be set to open at no more than 150 psig.

Pressure test the system using dry nitrogen and soapy water to locate leaks. If you wish to use a leak detector, charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure, then apply the detector to suspect areas. If leaks are found, repair them. After repair, repeat the pressure test. If no leaks exist, proceed to system evacuation.

S-102 EVACUATION

WARNING

REFRIGERANT UNDER PRESSURE!

Failure to follow proper procedures may cause property damage, personal injury or death.

a vacuum gauge to give a true reading of the vacuum in the system.

NOTE:

Never use the Scroll compressor as a vacuum pump or run when under a high vacuum. Motor damage could occur

.

Condensing unit liquid and suction valves are closed to contain the charge within the unit. The unit is shipped with the valve stems closed and caps installed.

Do not open valves until the system is evacuated.

1.

Connect the vacuum pump with 250 micron capability to the service valves.

2.

Evacuate the system to 250 microns or less using suction

and

liquid service valves. Using both valves is necessary as some compressors create a mechanical seal separating the sides of the system.

3.

Close pump valve and hold vacuum for 10 minutes.

Typically pressure will rise during this period.

4.

If the pressure rises to 1000 microns or less and remains steady the system is considered leak free; proceed to startup.

5.

If pressure rises above 1000 microns but holds steady below 2000 microns, moisture and/or noncondensibles may be present or the system may have a small leak.

6.

Return to step 2: If the same result is encountered check for leaks as previously indicated and repair as necessary then repeat evacuation.

7.

If pressure rises above 2000 microns, a leak is present. Check for leaks as previously indicated and repair as necessary then repeat evacuation.

WARNING

Do not front seat the service valve(s) with the compressor open, with the suction line of the comprssor closed or severely restricted.

IMPORTANT NOTE:

Because of the potential damage to compressors, do not allow suction pressure at service valve to drop below 20 PSIG when pumping unit system down for repair. Outdoor section, depending on line set length and amount of charge in system, may not be able to hold the entire system charge.

This is the most important part of the entire service procedure.

The life and efficiency of the equipment is dependent upon the thoroughness exercised by the serviceman when evacuating air (non-condensables) and moisture from the system. Air in a system causes high condensing temperature and pressure, resulting in increased power input and reduced performance. Moisture chemically reacts with the refrigerant oil to form corrosive acids. These acids attack motor windings and parts, causing breakdown. The equipment required to thoroughly evacuate the system is a high vacuum pump, capable of producing a vacuum equivalent to 250 microns or less and

LOW SIDE

GAUGE

AND VALVE

800 PSI

RATED

HOSES

TO

UNIT SERVICE

VALVE PORTS

HIGH SIDE

GAUGE

AND VALVE

VACUUM PUMP

ADAPTER

VACUUM PUMP

EVACUATION

CHARGING

CYLINDER

AND SCALE

83

SERVICING

S-103 CHARGING

WARNING

REFRIGERANT UNDER PRESSURE!

* Do not overcharge system with refrigerant.

* Do not operate unit in a vacuum or at negative

pressure.

Failure to follow proper procedures may cause property damage, personal injury or death.

CAUTION

Use refrigerant certified to AHRI standards. Used refrigerant may cause compressor damage and is not covered under the warranty. Most portable machines cannot clean used refrigerant to meet

AHRI standards.

Operating the compressor with the suction valve closed is not covered by the warranty and will cause serious compressor damage.

Charge the system with the exact amount of refrigerant. Refer to the specification section or check the unit nameplates for the correct refrigerant charge. An inaccurately charged system will cause future problems.

NOTE:

R410A should be drawn out of the storage container or drum in liquid form due to its fractionation properties, but should be “Flashed” to its gas state before entering the system. There is commercially available restriction devices that fit into the system charging hose set to accomplish this.

DO NOT charge liquid R410A into the compressor.

NOTE: Power must be supplied to the 18 SEER outdoor units containing ECM motors before the power is applied to the indoor unit. Sending a low voltage signal without high voltage power present at the outdoor unit can cause malfunction of the control module on the ECM motor.

Adequate refrigerant charge for the matching evaporator coil or air handler and 15 feet of line set is supplied with the condensing unit. If using evaporator coils or air handlers other than HSVTC coil it may be necessary to add or remove refrigerant to attain proper charge. If line set exceeds 15 feet in length, refrigerant should be added at .6 ounces per foot of liquid line.

NOTE: The outdoor temperature should be 60°F or higher when charging the unit.Charge should always be checked using subcooling when using TXV equipped indoor coil to verify proper charge.

Open the suction service valve first!

If the liquid service valve is opened first, oil from the compressor may be drawn into the indoor coil TXV, restricting refrigerant flow and affecting operation of the system.

When opening valves with retainers, open each valve only until the top of the stem is 1/8" from the retainer. To avoid loss of refrigerant, DO NOT apply pressure to the retainer. When opening valves without a retainer remove service valve cap and insert a hex wrench into the valve stem and back out the stem by turning the hex wrench counterclockwise. Open the valve until it contacts the rolled lip of the valve body.

NOTE: These are not back-seating valves. It is not necessary to force the stem tightly against the rolled lip.

After the refrigerant charge has bled into the system, open the liquid service valve. The service valve cap is the secondary seal for the valve and must be properly tightened to prevent leaks. Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap. Tighten cap finger-tight and then tighten additional 1/6 of a turn (1 wrench flat) to properly seat the sealing surfaces.

EXPANSION VALVE SYSTEM

NOTE:

Units matched with indoor coils equipped with nonadjustable TXV should be charged by subcooling only.

NOTE:

The TXV should NOT be adjusted at light load conditions 55º to 60ºF. Use the following guidelines and methods to check unit operation and ensure that the refrigerant charge is within limits. Charge the unit on low stage.

Units Equipped with Adjustable Expansion

Valves should be charged by Subcooling and

Superheat adjusted only if necessary.

1. Purge gauge lines. Connect service gauge manifold to base-valve service ports. Run the system in low stage at least

10 minutes to allow pressure to stabilize.

2. Temporarily install a thermometer on the liquid line at the liquid line service valve and 4-6" from the compressor on the suction line. Ensure the thermometer makes adequate contact and is insulated for best possible readings. Use liquid line temperature to determine subcooling and vapor temperature to determine superheat.

3. Check subcooling and superheat. Systems with TXV application should have a subcooling of 5 to 7°F and superheat of 7 to 9 °F.

a. If subcooling and superheat are low, adjust TXV to 7 to

9 ºF superheat, and then check subcooling.

NOTE:

To adjust superheat, turn the valve stem clockwise to increase and counter clockwise to decrease.

b. If subcooling is low and superheat is high, add charge to raise subcooling to 5 to 7 °F then check superheat.

c. If subcooling and superheat are high, adjust TXV valve to 7 to 9 ºF superheat, then check subcooling.

d. If subcooling is high and superheat is low, adjust TXV valve to 7 to 9 ºF superheat and remove charge to lower the subcooling to 5 to 7 ºF.

84

SERVICING

NOTE:

Do NOT adjust the charge based on suction pressure unless there is a gross undercharge.

4. Disconnect manifold set, installation is complete.

SUBCOOLING FORMULA = SATURATED LIQUID

TEMP. - LIQUID LINE TEMP.

NOTE

: Check the Schrader ports for leaks and tighten valve cores if necessary. Install caps fingertight.

HEAT PUMP - HEATING CYCLE

The proper method of charging a heat pump in the heat mode is by weight with the additional charge adjustments for line size, line length, and other system components. For best results on outdoor units with TXVs, superheat should be 2-

5°F at 4-6" from the compressor. Make final charge adjustments in the cooling cycle.

S-108 SUPERHEAT

The expansion valves are factory adjusted to maintain 7 to 9 degrees superheat of the suction gas. Before checking the superheat or replacing the valve, perform all the procedures outlined under Air Flow, Refrigerant Charge, Expansion Valve

- Overfeeding, Underfeeding. These are the most common causes for evaporator malfunction.

CHECKING SUPERHEAT

Refrigerant gas is considered superheated when its temperature is higher than the saturation temperature corresponding to its pressure. The degree of superheat equals the degrees of temperature increase above the saturation temperature at existing pressure. See Temperature - Pressure Chart on following pages.

S-104 CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefficiency is broken or damaged scroll flanks on Scroll compressors, reducing the ability of the compressor to pump refrigerant vapor.

The condition of the scroll flanks is checked in the following manner.

1. Attach gauges to the high and low side of the system.

2. Start the system and run a "Cooling Performance Test.

If the test shows: a. Below normal high side pressure.

b. Above normal low side pressure.

c. Low temperature difference across coil.

d. Low amp draw at compressor.

And the charge is correct. The compressor is faulty - replace the compressor.

S-106 OVERFEEDING

Overfeeding by the expansion valve results in high suction pressure, cold suction line, and possible liquid slugging of the compressor.

If these symptoms are observed:

1. Check for an overcharged unit by referring to the cooling performance charts in the servicing section.

2. Check the operation of the power element in the valve as explained in S-110 Checking Expansion Valve Operation.

3. Check for restricted or plugged equalizer tube.

CAUTION

To prevent personal injury, carefully connect and disconnect manifold gauge hoses. Escaping liquid refrigerant can cause burns. Do not vent refrigerant to atmosphere. Recover during system repair or final unit disposal.

1. Run system at least 10 minutes to allow pressure to stabilize.

2. For best results, temporarily install a thermometer on the liquid line at the liquid line service valve and 4-6" from the compressor on the suction line. Ensure the thermometer makes adequate contact and is insulated for best possible readings. Use liquid line temperature to determine sub-cooling and vapor temperature to determine superheat.

NOTE:

An optional method is to locate the thermometer at the suction line service valve. Ensure the thermometer makes adequate contact and is insulated for best possible readings.

3. Refer to the superheat table provided for proper system superheat. Add charge to lower superheat or recover charge to raise superheat.

Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.

EXAMPLE:

a. Suction Pressure = 143 b. Corresponding Temp. °F. = 50 c. Thermometer on Suction Line = 61°F.

To obtain the degrees temperature of superheat, subtract

50.0 from 61.0°F.

The difference is 11° Superheat. The 11° Superheat would fall in the ± range of allowable superheat.

S-107 UNDERFEEDING

Underfeeding by the expansion valve results in low system capacity and low suction pressures.

If these symptoms are observed:

1. Check for a restricted liquid line or drier. A restriction will be indicated by a temperature drop across the drier.

2. Check the operation of the power element of the valve as described in S-110 Checking Expansion Valve Operation.

S-109 CHECKING SUBCOOLING

Refrigerant liquid is considered subcooled when its temperature is lower than the saturation temperature corresponding to its pressure.

The degree of subcooling equals the degrees of temperature decrease below the saturation temperature at the existing pressure.

85

SERVICING

1. Attach an accurate thermometer or preferably a thermocouple type temperature tester to the liquid line as it leaves the condensing unit.

2. Install a high side pressure gauge on the high side (liquid) service valve at the front of the unit.

3. Record the gauge pressure and the temperature of the line.

4. Review the technical information manual or specification sheet for the model being serviced to obtain the design subcooling.

5. Compare the hi-pressure reading to the "Required Liquid

Line Temperature" chart (page 108). Find the hi-pressure value on the left column. Follow that line right to the column under the design subcooling value. Where the two intersect is the required liquid line temperature.

Alternately you can convert the liquid line pressure gauge reading to temperature by finding the gauge reading in

Temperature - Pressure Chart and reading to the left, find the temperature in the °F. Column.

6. The difference between the thermometer reading and pressure to temperature conversion is the amount of subcooling.

Add charge to raise subcooling. Recover charge to lower subcooling.

Subcooling Formula = Sat. Liquid Temp. - Liquid Line

Temp.

EXAMPLE:

a. Liquid Line Pressure = 417 b. Corresponding Temp. °F. = 120° c. Thermometer on Liquid line = 109°F.

To obtain the amount of subcooling subtract 109°F from

120°F.

The difference is 11° subcooling. See the specification sheet or technical information manual for the design subcooling range for your unit.

S-112 CHECKING RESTRICTED LIQUID LINE

When the system is operating, the liquid line is warm to the touch. If the liquid line is restricted, a definite temperature drop will be noticed at the point of restriction. In severe cases, frost will form at the restriction and extend down the line in the direction of the flow.

Discharge and suction pressures will be low, giving the appearance of an undercharged unit. However, the unit will have normal to high subcooling.

Locate the restriction, replace the restricted part, replace drier, evacuate and recharge.

S-113 OVERCHARGE OF REFRIGERANT

An overcharge of refrigerant is normally indicated by an excessively high head pressure.

An evaporator coil, using an expansion valve metering device, will basically modulate and control a flooded evaporator and prevent liquid return to the compressor.

An evaporator coil, using a capillary tube metering device, could allow refrigerant to return to the compressor under extreme overcharge conditions. Also with a capillary tube metering device, extreme cases of insufficient indoor air can cause icing of the indoor coil and liquid return to the compressor, but the head pressure would be lower.

There are other causes for high head pressure which may be found in the "Service Problem Analysis Guide."

If other causes check out normal, an overcharge or a system containing non-condensables would be indicated.

If this system is observed:

1. Start the system.

2. Remove and capture small quantities of gas from the suction line dill valve until the head pressure is reduced to normal.

3. Observe the system while running a cooling performance test. If a shortage of refrigerant is indicated, then the system contains non-condensables.

S-110 CHECKING EXPANSION VALVE OPERA-

TION

1. Remove the remote bulb of the expansion valve from the suction line.

2. Start the system and cool the bulb in a container of ice water, closing the valve. As you cool the bulb, the suction pressure should fall and the suction temperature will rise.

3. Next warm the bulb in your hand. As you warm the bulb, the suction pressure should rise and the suction temperature will fall.

4. If a temperature or pressure change is noticed, the expansion valve is operating. If no change is noticed, the valve is restricted, the power element is faulty, or the equalizer tube is plugged.

5. Capture the charge, replace the valve and drier, evacuate and recharge.

S-114 NON-CONDENSABLES

If non-condensables are suspected, shut down the system and allow the pressures to equalize. Wait at least 15 minutes. Compare the pressure to the temperature of the coldest coil since this is where most of the refrigerant will be.

If the pressure indicates a higher temperature than that of the coil temperature, non-condensables are present.

Non-condensables are removed from the system by first removing the refrigerant charge, replacing and/or installing liquid line drier, evacuating and recharging.

86

104

106

108

110

112

90

92

94

96

98

100

102

82

84

86

88

72

74

76

78

80

60

62

64

66

68

70

46

48

50

52

54

56

58

PSIG °F

12

-37.7

14 -34.7

16

18

20

22

24

26

-32.0

-29.4

-36.9

-24.5

-22.2

28

30

32

34

36

-20.0

-17.9

-15.8

-13.8

-11.9

38

40

42

44

-10.1

-8.3

-6.5

-4.5

-3.2

-1.6

0.0

1.5

3.0

4.5

5.9

7.3

21.0

22.1

23.2

24.3

25.4

26.4

27.4

28.5

29.5

8.6

10.0

11.3

12.6

13.8

15.1

16.3

17.5

18.7

19.8

30.5

31.2

32.2

33.2

34.1

35.1

35.5

36.9

SERVICING

192.0

194.0

196.0

198.0

200.0

202.0

204.0

206.0

208.0

210.0

212.0

214.0

162.0

164.0

166.0

168.0

170.0

172.0

174.0

176.0

178.0

180.0

182.0

184.0

186.0

188.0

190.0

148.0

150.0

152.0

154.0

156.0

158.0

160.0

PSIG °F

114.0

37.8

116.0

38.7

118.0

120.0

122.0

124.0

126.0

128.0

39.5

40.5

41.3

42.2

43.0

130.0

132.0

134.0

136.0

138.0

43.8

44.7

45.5

46.3

47.1

140.0

142.0

144.0

146.0

47.9

48.7

49.5

50.3

51.1

51.8

52.5

53.3

54.0

54.8

55.5

56.2

63.8

64.5

65.1

65.8

66.4

67.0

67.7

68.3

68.9

57.0

57.7

58.4

59.0

59.8

60.5

61.1

61.8

62.5

63.1

69.5

70.1

70.7

71.4

72.0

72.6

73.2

73.8

Pressure vs. Temperature Chart

R-410A

294.0

296.0

298.0

300.0

302.0

304.0

306.0

308.0

310.0

312.0

314.0

316.0

264.0

266.0

268.0

270.0

272.0

274.0

276.0

278.0

280.0

282.0

284.0

286.0

288.0

290.0

292.0

PSIG °F

216.0

74.3

218.0

74.9

220.0

222.0

224.0

226.0

228.0

230.0

75.5

76.1

76.7

77.2

77.8

232.0

234.0

236.0

238.0

240.0

78.4

78.9

79.5

80.0

80.6

242.0

244.0

246.0

248.0

81.1

81.6

82.2

82.7

83.3

250.0

252.0

254.0

256.0

258.0

260.0

262.0

83.8

84.3

84.8

85.4

85.9

86.4

86.9

92.4

92.8

93.3

93.8

94.3

94.8

95.2

95.7

96.2

87.4

87.9

88.4

88.9

89.4

89.9

90.4

90.9

91.4

91.9

96.6

97.1

97.5

98.0

98.4

98.9

99.3

99.7

370.0

111.2

372.0

111.6

374.0

112.0

376.0

112.4

378.0

112.6

380.0

113.1

382.0

113.5

384.0

113.9

386.0

114.3

388.0

114.7

390.0

115.0

392.0

115.5

394.0

115.8

396.0

116.2

398.0

116.6

400.0

117.0

402.0

117.3

404.0

117.7

406.0

118.1

408.0

118.5

410.0

118.8

412.0

119.2

414.0

119.6

416.0

119.9

418.0

120.3

PSIG °F

318.0

100.2

320.0

100.7

322.0

101.1

324.0

101.6

326.0

102.0

328.0

102.4

330.0

102.9

332.0

103.3

334.0

103.7

336.0

104.2

338.0

104.6

340.0

105.1

342.0

105.4

344.0

105.8

346.0

106.3

348.0

106.6

350.0

107.1

352.0

107.5

354.0

107.9

356.0

108.3

358.0

108.8

360.0

109.2

362.0

109.6

364.0

110.0

366.0

110.4

368.0

110.8

472.0

129.7

474.0

130.0

476.0

130.3

478.0

130.7

480.0

131.0

482.0

131.3

484.0

131.6

486.0

132.0

488.0

132.3

490.0

132.6

492.0

132.9

494.0

133.3

496.0

133.6

498.0

133.9

500.0

134.0

502.0

134.5

504.0

134.8

506.0

135.2

508.0

135.5

510.0

135.8

512.0

136.1

514.0

136.4

516.0

136.7

518.0

137.0

520.0

137.3

PSIG °F

420.0

120.7

422.0

121.0

424.0

121.4

426.0

121.7

428.0

122.1

430.0

122.5

432.0

122.8

434.0

123.2

436.0

123.5

438.0

123.9

440.0

124.2

442.0

124.6

444.0

124.9

446.0

125.3

448.0

125.6

450.0

126.0

452.0

126.3

454.0

126.6

456.0

127.0

458.0

127.3

460.0

127.7

462.0

128.0

464.0

128.3

466.0

128.7

468.0

129.0

470.0

129.3

*Based on ALLIED SIGNAL Data

608.0

150.1

612.0

150.6

616.0

151.2

620.0

151.7

624.0

152.3

628.0

152.8

632.0

153.4

636.0

153.9

640.0

154.5

644.0

155.0

648.0

155.5

652.0

156.1

656.0

156.6

660.0

157.1

664.0

157.7

668.0

158.2

672.0

158.7

676.0

159.2

680.0

159.8

684.0

160.3

688.0

160.8

692.0

161.3

696.0

161.8

PSIG °F

522.0

137.6

524.0

137.9

526.0

138.3

528.0

138.6

530.0

138.9

532.0

139.2

534.0

139.5

536.0

139.8

538.0

140.1

540.0

140.4

544.0

141.0

548.0

141.6

552.0

142.1

556.0

142.7

560.0

143.3

564.0

143.9

568.0

144.5

572.0

145.0

576.0

145.6

580.0

146.2

584.0

146.7

588.0

147.3

592.0

147.9

596.0

148.4

600.0

149.0

604.0

149.5

87

SERVICING

REQUIRED LIQUID LINE TEMPERATURE

LIQUID PRESSURE

AT SERVICE VALVE (PSIG)

189

195

202

208

215

222

229

236

243

251

259

266

274

326

335

345

354

364

374

384

395

283

291

299

308

317

406

416

427

439

450

462

474

486

499

511

110

112

114

116

118

120

122

124

126

128

94

96

98

100

102

104

106

108

70

72

74

76

78

80

82

8

58

60

62

64

66

68

84

86

88

90

92

100

102

104

106

92

94

96

98

82

84

86

88

90

REQUIRED SUBCOOLING TEMPERATURE (°F)

10 12 14 16 18

56

58

60

62

54

56

58

60

52

54

56

58

50

52

54

56

48

50

52

54

64

66

68

70

72

74

76

78

80

62

64

66

68

70

72

74

76

78

60

62

64

66

68

70

72

74

76

58

60

62

64

66

68

70

72

74

56

58

60

62

64

66

68

70

72

108

110

112

114

116

118

120

122

124

126

80

82

84

86

88

90

92

94

96

98

100

102

104

106

108

110

112

114

116

118

120

122

124

78

80

82

84

86

88

90

92

94

96

98

100

102

104

106

108

110

112

114

116

118

120

122

76

78

80

82

84

86

88

90

92

94

96

98

100

102

104

106

108

110

112

114

116

118

120

100

102

104

106

108

110

112

114

116

118

92

94

96

98

84

86

88

90

74

76

78

80

82

88

SERVICING

CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefficiency is broken or damaged scroll flanks on Scroll compressors, reducing the ability of the compressor to pump refrigerant vapor. The condition of the scroll flanks is checked in the following manner.

1. Attach gauges to the high and low side of the system.

2. Start the system and run a “Cooling Performance Test. If the test shows: a. Below normal high side pressure.

b. Above normal low side pressure.

c. Low temperature difference across coil.

d. Low amp draw at compressor.

And the charge is correct. The compressor is faulty

– replace the compressor.

S-115 COMPRESSOR BURNOUT

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

If a compressor is suspected of being burned-out, attach a refrigerant hose to the liquid line dill valve and properly remove and dispose of the refrigerant.

NOTICE

Violation of EPA regulations may result in fines or other penalties.

Now determine if a burn out has actually occurred. Confirm by analyzing an oil sample using a Sporlan Acid Test Kit, AK-

3 or its equivalent.

Remove the compressor and obtain an oil sample from the suction stub. If the oil is not acidic, either a burnout has not occurred or the burnout is so mild that a complete clean-up is not necessary.

If acid level is unacceptable, the system must be cleaned by using the clean-up drier method.

CAUTION

Do not allow the sludge or oil to contact the skin.

Severe burns may result.

NOTE:

The Flushing Method using R-11 refrigerant is no longer approved by Amana ® Brand Heating-Cooling.

Suction Line Drier Clean-Up Method

The POE oils used with R410A refrigerant is an excellent solvent. In the case of a burnout, the POE oils will remove any burnout residue left in the system. If not captured by the refrigerant filter, they will collect in the compressor or other system components, causing a failure of the replacement compressor and/or spread contaminants throughout the system, damaging additional components.

Install a field supplied suction line drier. This drier should be installed as close to the compressor suction fitting as possible. The filter must be accessible and be rechecked for pressure drop after the system has operated for a time. It may be necessary to use new tubing and form as required.

NOTE:

At least twelve (12) inches of the suction line immediately out of the compressor stub must be discarded due to burned residue and contaminates.

1. Remove compressor discharge line strainer.

2. Remove the liquid line drier and expansion valve.

3 Purge all remaining components with dry nitrogen or carbon dioxide until clean.

4. Install new components

including

liquid line drier.

5. Braze all joints, leak test, evacuate, and recharge system.

6. Start up the unit and record the pressure drop across the drier.

7. Continue to run the system for a minimum of twelve (12) hours and recheck the pressure drop across the drier.

Pressure drop should not exceed 6 PSIG.

8. Continue to run the system for several days, repeatedly checking pressure drop across the suction line drier. If the pressure drop never exceeds the 6 PSIG, the drier has trapped the contaminants. Remove the suction line drier from the system.

9. If the pressure drop becomes greater, then it must be replaced and steps 5 through 9 repeated until it does not exceed 6 PSIG.

NOTICE:

Regardless, the cause for burnout must be determined and corrected before the new compressor is started.

S-120 REFRIGERANT PIPING

The piping of a refrigeration system is very important in relation to system capacity, proper oil return to compressor, pumping rate of compressor and cooling performance of the evaporator.

POE oils maintain a consistent viscosity over a large temperature range which aids in the oil return to the compressor; however, there will be some installations which require oil return traps. These installations should be avoided whenever possible, as adding oil traps to the refrigerant lines also increases the opportunity for debris and moisture to be introduced into the system. Avoid long running traps in horizontal suction line.

89

SERVICING

ALUMINUM INDOOR COIL CLEANING

(Qualified Servicer Only)

This unit is equipped with an aluminum tube evaporator coil.

The safest way to clean the evaporator coil is to simply flush the coil with water. This cleaning practice remains as the recommended cleaning method for both copper tube and aluminum tube residential cooling coils.

An alternate cleaning method is to use one of the products listed in the technical publication

TP-109 (shipped in the literature bag with the unit)

to clean the coils. The cleaners listed are the only agents deemed safe and approved for use to clean round tube aluminum coils. TP-109 is available on the web site in Partner Link > Service Toolkit.

NOTE:

Ensure coils are rinsed well after use of any chemical cleaners.

Air Handler Static Pressure Readings

S-203A TWO PIECE AIR HANDLER EXTERNAL

STATIC PRESSURE

To determine proper airflow, proceed as follows:

1. Using a Inclined Manometer or Magnehelic gauge, measure the static pressure between the outlet of the evaporator coil and the inlet of the air handler, this will be a negative pressure ( for example -.30"wc)

2. Measure the static pressure of the supply duct at the outlet of the unit, this should be a positive pressure (for example

.20"wc).

3. Add the two readings together (for example -.30"wc +

.20"wc = .50"wc total static pressure.

NOTE:

Both readings may be taken simultaneously and read directly on the manometer if so desired.

4. Consult proper air handler airflow chart for quantity of air

(CFM) at the measured external static pressure.

S-203 SINGLE PIECE AIR HANDLER EXTERNAL

STATIC PRESSURE

To determine proper airflow, proceed as follows:

1. Using a Inclined Manometer or Magnehelic gauge , measure the static pressure of the return duct at the inlet of the air handler, this will be a negative pressure ( for example

-.30"wc)

2. Measure the static pressure of the supply duct at the outlet of the air handler, this should be a positive pressure (for example .20"wc).

3. Add the two readings together (for example -.30"wc +

.20"wc = .50"wc total external static pressure.

NOTE:

Both readings may be taken simultaneously and read directly on the manometer if so desired.

4. Consult proper air handler airflow chart for quantity of air

(CFM) at the measured external static pressure.

Return Static

-.30”wc

Supply Static

+.20”wc

90

ACCESSORIES WIRING DIAGRAMS

HIGH VOLTAGE!

DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS

UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO

DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

3-Phase Heat Kit

25kW Heat Kit

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

91


HIGH VOLTAGE!




A/DSXC16

E26

E28

E29

E24

E22

E23

1

4

3

6

1 2

E5 OT SEEN

DT

CHS

K6

OR

CAP

OT

CH

ANM PSCF

C

T AR ST

OR

FAN

CIT

RD HA

SR

5

PA

P

R

S

C

COM

ION

C

HERM

2

1

CA

AL

RU N

OPT

RM

CAP

H E

COM

SC

H

R

C

S

ROL

LO W

HIG

NT

K2

UCCO

E47

E26

E1

E24

E23

E22

E29

E28

K4

K3

L1 L2

92



HIGH VOLTAGE!




A/DSXC18

E23

E24

E22

E28

E29

E26

1

4

3

6

1 2

5 TE SEE NO

E29

E28

DT

E47

E26

E1

E24

E23

E22

CH S

K6

CH

R

AN

MO TO

ECMF

C

D

OR CIT CAPA

RUN

AR H

SR

5

T

N AL

2

1

TIO

FAN

STAR

OP

HERM

C

P

C

R

S

CO M

SC

S

R

C

CO M

CAP

HERM

L RO

K2

CO NT UC

L1 L2


93


HIGH VOLTAGE!




A/DSZC16

E22

E23

E9

E26

E28

E29

1

4

3

6

1 2

OAT OCT

E 6 OT SEEN

E29

E28

) NLY PO UM

DT

EATP (H

CC H

R TO

CAP

CH S

MO AN

T AR ST

OR

FAN

RD

5

CIT PA

M

SR

HA

P

R

ION

S

C

COM

2

1

CA

AL

C

HER

RU N

OPT

C

PSCF

SC

CAP

HE RM

COM

R

C

S

H

LO W

HIG

E9

E23

E22

K5

E7

E26

E1

L

K2

NTRO

K4

K3

UC C O

L1 L2

94



HIGH VOLTAGE!




A/DSZC18

E26

E28

E24

E29

E22

E23

1

4

3

6

DT

) NLY PO UM EATP (H

E6 OT EN SE

E47

E26

E1

E24

E23

E22

E29

E28

K6

L RO ONT UCC

CC H

CH S

R

FAN

MO TO

ECM

C

D AR

OR IT A C

RU N

CAP

R T

L H

5

NA IO

STA

SR

2

1

OPT

FAN

C

HERM

P

C

R

S

CO M

SC

M CO

HE RM

R

C

S

CAP

K2

L1 L2

L1 L2


95


HIGH VOLTAGE!




AVPTC1830-3137 AND 4260

BK

L1 L2

FL

HTR1 TL

R

M 1

M 2

BK

BK

RD

BK

BL

PU

W H

B K

RD

5

6

2

3

4

PLM

1

7

8

9

BK

RD

FL

FL

HTR2 TL

HTR1 TL

M1

R

M2

M3

M 4

BK

RD

BK

RD

RD

BK

PU

BL

BK

PLM

1

RD

2

3

4

W H

8

9

5

6

7

FL

FL

HTR1 TL BK

FL

HTR2

TL

RD

HTR3

TL

BK

RD

BK

YL

BK

RD

M 1

M2

M3

M4

R1

M 1

M 2

YL

BL

PU

R2

BK

RD

WH

RD

BL

3

4

BR

5

6

P L M

1

2

YL

RD

BK

7

8

9

RD

BK

BL BK RD

YL

FL

FL

HTR1

TL

HTR2

TL

FL

FL

HTR3

TL

HTR4 TL

M 1

M 2

BK

RD

BK

RD

YL

PU

M 3

M 4

R1

M 5

M 6

BL

BL

M 7

M 8

R2

WH

BK

P LM

1

RD

BL

4

BR 5

2

3

6

YL

RD

BL

BK

7

8

9

COLOR CODES:

PK PINK

BR BROWN

WH WHITE

BL BLUE

GY GRAY

RD RED

YL YELLOW

OR ORANGE

PU PURPLE

GN GREEN

BK BLACK

L1 L2

ONE (1) ELEMENT ROWS TWO (2) ELEMENT ROWS

L1 L2 L1 L2

THREE (3) ELEMENT ROWS

L1 L2 L1 L2

FOUR (4) ELEMENT ROWS

RD

1

6

5

4

7

8

9

1

BK

SEE

NOTE

7

7

8

9

6

5

4

NOTE: WHEN INSTALLING HEATER KIT, ENSURE SPEED TAP DOES NOT EXCEED MINIMUM BLOWER SPEED (MBS) SPECIFIED FOR THE AIRHANDLER/HEATER

KIT COMBINATION ON THIS UNIT'S S&R PLATE. AFTER INSTALLING OPTIONAL HEAT KIT, MARK AN "X" IN THE PROVIDED ABOVE.

MARK ACCORDING TO NUMBER OF HEATER ELEMENT ROWS INSTALLED. NO MARK INDICATES NO HEAT KIT INSTALLED.

PL1 PL2

2

2

3

3

RD

40 VA TRANSFORMER, SEE NOTE 1

230 VAC

3

RD

RD

208 VAC

2

24 VAC

COM

1

BL

BK

WH

BR

BL

BK

4 CIRCUIT HEATER

CONNECTOR

CFM LE D

RD

GND

BL

GN

TH

TR

COM

FUSE

24 V

3 A

DIAGNOSTI C

LE D

SE E

NOTE 5

1

2

DE HU M

O

Y2

Y1

3

4

LEAR N

DIP S W ITCHE S

STA TU S

LE D

SEE NO TE 6

RX LE D

TWO-STAGE INTEGRATED CONTROL MODULE

W 2

W 1

G

C

R

2

1

BL

GY

BK

RD

ECM MOTOR

HARNESS

1

3

4

2

CIRCULATOR BLOWER

GND

3

4

1

2

5

BK

GN

RD

R

W 1

W 2

Y1

Y2

G

O

C

DISCONNECT

L1

FUSE 3 A

TO

MICR O

DEHUM

L1

TH

W1 (1)

W2 (2)

+VDC (1)

RX (2)

TX (3)

GND

INDOOR

AIR

CIRCULATOR

BLWR

208/230 VAC L2

40 VA

TRANSFORMER

24 VA C

HEAT SEQUENCER R1

HEAT SEQUENCER R2

GND (4)

TR

COM

INT EG RA TED CONTROL MODUL E

L2

GND

INDOOR

AIR

CIRCULATOR

BLWR

GN D

LOW VOLTAGE (24V)

LOW VOLTAGE FIELD

HI VOLTAGE (230V)

HI VOLTAGE FIELD

JUNCTION

TERMINAL

INTERNAL TO

INTEGRATED CONTROL

EQUIPMENT GND

FIELD GND

FIELD SPLICE

RESISTOR

OVERCURRENT

PROT. DEVICE

PLUG CONNECTION

NOTES:

1. PLACE RED WIRES ON TRANSFORMER

TERMINAL 2 FOR 208 VAC OPERATION.

2. MANUFACTURER'S SPECIFIED

REPLACEMENT PARTS MUST BE USED

WHEN SERVICING.

3. IF ANY OF THE ORIGINAL WIRES AS

SUPPLIED WITH THIS UNIT MUST

BE REPLACED, IT MUST BE REPLACED

WITH WIRING MATERIAL HAVING A

TEMPERATURE RATING OF AT LEAST 105°C.

USE COPPER CONDUCTORS ONLY.

4. UNIT MUST BE PERMANENTLY

GROUNDED AND CONFORM TO N.E.C AND

LOCAL CODES.

5. TO RECALL THE LAST 6 FAULTS, MOST

RECENT TO LEAST RECENT, DEPRESS

SWITCH FOR MORE THAN 2 SECONDS

WHILE IN STANDBY (N THERMOSTAT

INPUTS)

6. BIAS AND TERM DIP SWITCHES MUST BE

IN "ON" POSITION. RED STATUS LED

PROVIDES NETWORK STATUS. GREEN RX

LED INDICATES NETWORK TRAFFIC. USE

LEARN BUTTON TO RESET NETWORK.

7. DISCARD CONNECTOR PL1 WHEN

INSTALLING OPTIONAL HEAT KIT.

0140A00039-D

96



HIGH VOLTAGE!




AVPTC SMART FRAME

DISCONNECT

L1 L2

RD

PL1 PL2

2

2

3

3

1 1

6

5

4

7

6

5

4

8

9

7

8

9

SEE

NOTE 7

BK

RD

40 VA TRANS FORMER, SEE N OTE 1

RD

230 VAC

3

RD

208 VAC

2

24 VAC

GRND

GN

BL

GY

BK

BK

WH

BR

BL

BK

RD

COM

1

BL

RD

BL

4

3

2

1

C

W2 W1

4 CIRC UIT HEA TER

CONN ECT OR

SEE NOTE 5 FAULT

RECALL

SEE NOTE 6 STATUS

LED

CFM LED

LEARN

SEE NOTE 6

TH

TR

COM

24 V 3 A FUSE

CAS

SEE NOTE 8

7 SEGMENT

DIAGNOSTIC

DISPLAY

DEHUM

O

SEE NOTE 6

RX LED

Y2

Y1

W2

W1

G

C

S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13

DIP SWITCHES


R

2

1

ECM MOTOR

HARNESS

4 3 2 1

CIRCULATOR BLOWER

3

4

5

1

2

GN

BK

RD

GRND

GRND

L1

INDOOR

AIR

CIRCU LATOR

BLWR

208/230 VAC

GRND

40 VA

TRANSFORMER

24 VAC

HEAT 1 COIL/R1

L2

R

W1

FUSE 3 A

W2

Y1

Y2

TO

MICRO

G

O

DEHUM

C

TH

W1 (1)

W2 (2)

CAS (1)

CAS (2)

HEAT 2 COIL/ R2

CONDENSATE SWITCH

+VDC (1)

RX (2)

TX (3)

GRND (4)

TR

COM

INTEGRATED CONTROL MODULE

IND O OR

AIR

CIRC ULAT O R

BLW R

GRND

NOTES:

1. PLACE RED WIRES ON TRANSFORMER TERMIN AL 2 FOR 208 VAC OPER ATION.

2. MANUFACTURER'S SPECIFIED RE PLACE MENT PA RTS MU ST BE U SED WHEN SERVICING.

3. IF ANY OF THE ORIGINAL WIRES AS SU PPL IED WITH THIS UNIT MU ST BE R EPLACED,

IT MU ST BE R EPLACED WITH WIR ING M ATERI AL HAVING A TE MPER ATURE R ATING OF AT

LEAST 105°C. USE CO PPER CON DUCTORS O NLY.

4. UNIT MUST BE PER MANE NTLY GROUNDED AN D CONF ORM TO N.E.C A ND LOC AL CODES.

5. TO RECA LL THE LAST 6 FA ULTS, M OST RECENT TO LEA ST RECENT, D EPRE SS

SWITCH FOR MORE T HAN 2 SECONDS WHILE IN STANDBY (NO THERM OSTAT INPU TS)

6. RED STATUS LED PROVIDES N ETWORK STATUS. GREEN RX LED IND ICATE S NETWORK TRAFFIC.

USE LEARN B UTTON TO RES ET N ETWORK.

7. DISCARD C ONNECTOR PL1 WHEN INS TALLING O PTIONAL H EAT KI T.

8. THE CONDENS ATE ALARM SW ITCH (CA S) TERMIN ALS CAN ONLY BE UTILIZED W ITH CO MMUN ICATING

MODE S ETUPS AND MU ST BE ENA BLED WITH A COMMUNIC ATING THERM OSTAT. THIS F EATURE IS N OT

OPER ATIONAL W ITH LEGACY SY STE MS.

USE N.E.C CLA SS 2 WIRE.

INTEGRATED CONTROL

LOW VOLTAGE (24V)

LOW VOLTAGE FIE LD

HI VOL TAGE (230V)

HI VOL TAGE FIE LD

JUNCTI ON

TERMINAL

INTE RNAL TO

EQ UIPMENT GRND

FIEL D GRND

FIE LD SPL ICE

RE SISTOR

OV ERCUR RENT

PROT. DEV ICE

PLUG CONNECTION

COLOR CODES:

PK ---- PINK

BR ---- BROWN

WH ---- WHITE

BL ---- BLUE

GY ---- GRAY

RD ---- RED

YL ---- YELLOW

OR ---- ORANGE

PU ---- PURPLE

GN ---- GREEN

BK ---- BLACK

0140A00244-B


97


HIGH VOLTAGE!




MBVC

DISCONNECT

L1

L2

RD

PL1 PL2

2

2

3 3

1 1

6

5

4

7

8

6

5

4

7

8

9 9

BK

SEE

NOTE 7

RD

40 VA TRANS FORMER, SEE N OTE 1

RD

230 VAC

3

RD

208 VAC

2

24 VAC

GRND

GN

BL

GY

BK

BK

WH

BR

BL

BK

RD

COM

1

BL

RD

BL

4

3

2

1

C W2 W1

4 CIRC UIT HEA TER

CONN ECT OR

SEE NOTE 5

FAULT

RECALL

SEE NOTE 6 STATUS

LED

CFM LED

TH

TR

COM

24 V 3 A

FUSE

LEARN

SEE NOTE 6

CAS

SEE NOTE 8

7 SEGMENT

DIAGNOSTIC

DISPLAY

DEHUM

O

SEE NOTE 6

RX LED

Y2

Y1

W2

W1

G

C

S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13

DIP SWITCHES


R

2

1

ECM MOTOR

HARNESS

4 3 2 1

CIRCULATOR BLOWER

3

4

5

1

2

GN

BK

RD

GRND

GRND

L1

INDOOR

AIR

CIRCU LATOR

BLWR

208/230 VAC

GRND

40 VA

TRANSFORMER

24 VAC

HEAT 1 COIL/R1

L2

R

W1

FUSE 3 A

W2

Y1

Y2

TO

MICRO

G

O

DEHUM

C

TH

W1 (1)

W2 (2)

CAS (1)

CAS (2)

HEAT 2 COIL/ R2

CONDENSATE SWITCH

+VDC (1)

RX (2)

TX (3)

GRND (4)

TR

COM

INTEGRATED CONTROL MODULE

IND O OR

AIR

CIRC ULAT O R

BLW R

GRND

NOTES:

1. PLACE RED WIRES ON TRANSFORMER TERMIN AL 2 FOR 208 VAC OPER ATION.

2. MANUFACTURER'S SPECIFIED RE PLACE MENT PA RTS MU ST BE U SED WHEN SERVICING.

3. IF ANY OF THE ORIGINAL WIRES AS SU PPL IED WITH THIS UNIT MU ST BE R EPLACED,

IT MU ST BE R EPLACED WITH WIR ING M ATERI AL HAVING A TE MPER ATURE R ATING OF AT

LEAST 105°C. USE CO PPER CON DUCTORS O NLY.

4. UNIT MUST BE PER MANE NTLY GROUNDED AN D CONF ORM TO N.E.C A ND LOC AL CODES.

5. TO RECA LL THE LAST 6 FA ULTS, M OST RECENT TO LEA ST RECENT, D EPRE SS

SWITCH FOR MORE T HAN 2 SECONDS WHILE IN STANDBY (NO THERM OSTAT INPU TS)

6. RED STATUS LED PROVIDES N ETWORK STATUS. GREEN RX LED IND ICATE S NETWORK TRAFFIC.

USE LEARN B UTTON TO RES ET N ETWORK.

7. DISCARD C ONNECTOR PL1 WHEN INS TALLING O PTIONAL H EAT KI T.

8. THE CONDENS ATE ALARM SW ITCH (CA S) TERMIN ALS CAN ONLY BE UTILIZED W ITH CO MMUN ICATING

MODE S ETUPS AND MU ST BE ENA BLED WITH A COMMUNIC ATING THERM OSTAT. THIS F EATURE IS N OT

OPER ATIONAL W ITH LEGACY SY STE MS.

USE N.E.C CLA SS 2 WIRE.

INTEGRATED CONTROL

LOW VOLTAGE (24V)

LOW VOLTAGE FIE LD

HI VOL TAGE (230V)

HI VOL TAGE FIE LD

JUNCTI ON

TERMINAL

INTE RNAL TO

EQ UIPMENT GRND

FIEL D GRND

FIE LD SPL ICE

RE SISTOR

OV ERCUR RENT

PROT. DEV ICE

PLUG CONNECTION

COLOR CODES:

PK ---- PINK

BR ---- BROWN

WH ---- WHITE

BL ---- BLUE

GY ---- GRAY

RD ---- RED

YL ---- YELLOW

OR ---- ORANGE

PU ---- PURPLE

GN ---- GREEN

BK ---- BLACK

0140A00244-B

98


GOODMAN AVPTC37B14 AVPTC Series 3 Ton Single-Stage Multi-Position 3/4 hp Air Handler User guide

Service Instructions

ComfortNet

™

IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS

SAFE REFRIGERANT HANDLING

MANA

BRAND

PLIT

OMMUNICATING CONDENSERS R-410A 16 SEER

MANA

BRAND

PLIT

OMMUNICATING CONDENSERS R-410A 18 SEER

ELUXE

PLIT

OMMUNICATING CONDENSERS R-410A 16 SEER

OMMUNICATING CONDENSERS R-410A 18 SEER

ELUXE

PLIT

OMMUNICATING CONDENSERS R-410A 16 SEER

MANA

BRAND

PLIT

OMMUNICATING HEAT PUMPS R-410A 18 SEER

ELUXE

PLIT

OMMUNICATING HEAT PUMP R-410A 16 SEER

OMMUNICATING HEAT PUMP R-410A 18 SEER

SINGLE PIECE

IR HANDLER MULTIPLE-POSITION

ARIABLE SPEED

AINTED

XV WITH 4-WIRE

OMMUNICATING CONTROL

SINGLE PIECE

IR HANDLER MULTIPLE-POSITION

ARIABLE SPEED

AINTED

XV WITH 4-WIRE

OMMUNICATING CONTROL

ODULAR

LOWER AIR HANDLER

MULTI-POSITION VARIABLE-SPEED

OMMUNICATING READY

W/4-WIRES

SINGLE PIECE

IR HANDLER MULTIPLE-POSITION

ARIABLE SPEED

AINTED

XV WITH 4-WIRE

OMMUNICATING CONTROL

INDOOR COIL

UPFLOW/DOWNFLOW

NCASED

LOWRATOR

INDOOR COIL

UPFLOW/DOWNFLOW

AINTED

LOWRATOR

INDOOR COIL

UPFLOW/DOWNFLOW

AINTED

XV

-INDOOR COIL

ORIZONTAL A-COIL

AINTED

LOWRATOR

INDOOR COIL

HORIZONTAL SLAB COIL

-UNPAINTED

LOWRATOR

EXPANSION VALVE KITS

FSK01A

FREEZE THERMOSTAT

KIT

HK* SERIES ELETRIC HEAT KITS -

ELECTRIC HEAT KIT APPLICATIONS - MBVC

ELECTRIC HEAT KIT APPLICATIONS - AVPTC

AVPTC**14**

**HK* SERIES ELETRIC HEAT KITS -**

AVPTC14

S-3E CTK0* COMFORTNET**