Rheem ASL-JEC 18 Seer, RASL-024JEC, RASL-036JEC, RASL-039JEC, RASL-048JEC Installation Instructions Manual

...

Page 1

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING

INSTALLATION INSTRUCTIONS

ISO 9001:2008

AIR-COOLED CONDENSING UNITS

(-)ASL-JEC 18 SEER EQUIPPED WITH THE COMFORT CONTROL SYSTEM™ AND FEATURING DUAL DRIVE COMPRESSORS IN SELECT MODELS

[ ] INDICATES METRIC CONVERSIONS

Featuring Industry Standard R-410A Refrigerant

92-101691-05-06

SUPERSEDES 92-101691-05-05

Page 2

TABLE OF CONTENTS

1.0 SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.0 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Checking Product Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4 Electrical and Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5 Proper Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.0 LOCATING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Corrosive Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

.2 Condenser Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Operational Issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 For Condensers With Space Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Customer Satisfaction Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.6 Unit Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7 Factory-Preferred Tie-Down Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.0 REFRIGERANT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Tools Required for Installing & Servicing R-410A Models . . . . . . . . . . . . . . 9

4.2 Specifications of R-410A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.3 Quick Reference Guide for R-410-A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.0 REPLACEMENT UNITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.0 INDOOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.0 INTERCONNECTING TUBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.1 Vapor and Liquid Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.2 Maximum Length of Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.3 Outdoor Unit Installed Above or Below Indoor Coil . . . . . . . . . . . . . . . . . . 12

7.4 Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.5 Tubing Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7.6 Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.0 DUAL DRIVE COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8.1 Compressor Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8.2 Comfort Control

8.3 Comfort Control

9.0 COMPRESSOR CRANKCASE HEAT (CCH) . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

10.0 HARD START COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

11.0 HIGH AND LOW PRESSURE CONTROLS (HPC AND LPC). . . . . . . . . . . . . . . 17

11.1 Evacuation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

12.0 CONDENSING UNITS EQUIPPED WITH THE COMFORT CONTROL

SYSTEM™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

12.1 Control Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

12.2 Comfort Control

12.3 Comfort Control

12.4 Comfort Control

12.5 Active Compressor Protection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

12.6 Test and Fault Recall Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

12.7 ICC Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

12.8 Conventional 24VAC Thermostat Control Wiring . . . . . . . . . . . . . . . . . . . 29

12.9 Typical Non-Communicating Thermostat Wiring Diagrams. . . . . . . . . . . . 30

12.10 Diagnostic Codes in Dual Drive Condensing Units With Conventional

Thermostat Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

12.11 ICC Control Operation with Conventional Thermostat Wiring . . . . . . . . . . 31

12.12 Active Compressor Protection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.13 Test and Fault Recall Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

13.0 ELECTRICAL WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

13.1 Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

13.2 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

13.3 Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14.0 START-UP AND PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

15.0 CHECKING AIRFLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

16.0 CHECKING REFRIGERANT CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

16.1 Charging Units With R-410A Refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . 37

16.2 Charging By Liquid Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

16.3 Charging By Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

16.4 Final Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

17.0 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

17.1 Remote Outdoor Temperature Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

17.2 RXME-A02 Communicating 2 Wire Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

18.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

18.1 Comfort Control

18.2 Replacement of Comfort Control

18.3 Electrical Checks Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

18.4 Cooling Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . 41

18.5 General Trouble Shooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

18.6 Service Analyzer Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-47

18.7 Subcooling Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

19.0 WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-50

System™ Control Identification . . . . . . . . . . . . . . . . . . . 16

System™ Control Operation . . . . . . . . . . . . . . . . . . . . . 17

Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Diagnostic Codes in Dual Drive . . . . . . . . . . . . . . . . . . . 20

ICC Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 21

System™ System Initial Startup . . . . . . . . . . . . . . . . . . 38

System™ Control Board . . . . . . . . . . . 39

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1.0 SAFETY INFORMATION

WARNING

THE MANUFACTURER’S WARRANTY DOES NOT COVER ANY DAMAGE OR DEFECT TO THE AIR CONDITIONER CAUSED BY THE ATTACHMENT OR USE OF ANY COMPONENTS, ACCESSORIES OR DEVICES (OTHER THAN THOSE AUTHORIZED BY THE MANUFACTURER) INTO, ONTO OR IN CONJUNCTION WITH THE AIR CONDITIONER. YOU SHOULD BE AWARE THAT THE USE OF UNA U THOR I ZED COM P ONEN T S, ACCE S SORI E S O R DEVI C ES MAY ADVERSELY AFFECT THE OPERATION OF THE AIR CONDITIONER AND MAY ALSO ENDANGER LIFE AND PROPERTY. THE MANUFACTURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS OR INJURY RESULTING FROM THE USE OF SUCH UNAUTHORIZED COMPONENTS, ACCESSORIES OR DEVICES.

WARNING

DISCONNECT ALL POWER TO UNIT BEFORE STARTING MAINTENANCE. FAILURE TO DO SO CAN CAUS E ELECTRIC AL SHO CK R ESULTIN G IN SEVERE PERSONAL INJURY OR DEATH.

WARNING

DO NOT USE OXYGEN TO PURGE LINES OR PRESSURIZE SYSTEM FOR LEAK TEST. OXYGE N REAC TS VIOLENTLY WITH OIL, WHI CH CAN CAUSE AN EXPLOSION RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

WARNING

THE UNIT MUST BE PERMANENTLY GROUNDED. FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

WARNING

TURN OFF ELECTRIC POWER AT THE FUSE BOX OR SERVICE PANEL BEFORE MAKING ANY ELECTRICAL CONNECTIONS.

ALSO, THE GROUND CONNECTION MUST BE COMPLETED BEFORE MAKING LINE VOLT AGE CO NNECT IONS. FAILU RE TO DO SO CAN RESULT IN ELECTRICAL SHOCK, SEVERE PERSONAL INJURY OR DEATH.

Continued on next page ➜

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CAUTION

R-410A systems operate at higher pressures than R-22 systems. Do not use R-22 service equipment or components on R-410A equipment.

CAUTION

Only use evaporators approved for use on R-410A systems. Use of existing R-22 evaporators can introduce mineral oil to the R-410A refrigerant forming two different liquids and decreasing oil return to the compressor. This can result in compressor failure.

CAUTION

When coil is installed over a finished ceiling and/or living area, it is rec o m mended t h a t a s econd a r y sheet me t a l conden s ate pan be constructed and installed under entire unit. Failure to do so can result in property damage.

CAUTION

THE COMPRESSOR HAS AN INTERNAL OVERLOAD PROTECTOR. UNDER SOME CONDITIONS, IT CAN TAKE UP TO 2 HOURS FOR THIS OVERLOAD TO RESET. MAKE SURE OVERLOAD HAS HAD TIME TO RESET BEFORE CONDEMNING THE COMPRESSOR.

CAUTION

UNIT MAY START SUDDENLY AND WITHOUT WARNING Solid red light indicates a thermostat call for unit operation is present at the ICC control. ICC control will attempt to start unit after short cycle timer expires or when in Active Protection mode will attempt to restart unit prior to Lockout mode.

CAUTION

UNIT MAY START SUDDENLY AND WITHOUT WARNING Solid red light indicates a thermostat call for unit operation is present at the ICC. ICC will attempt to start unit after short cycle timer expires or when in Active Protection mode will attempt to restart unit prior to Lockout mode.

CAUTION

THE TOP OF THE SCROLL COMPRESSOR SHELL IS HOT. TOUCHING THE COMPRESSOR TOP MAY RESULT IN SERIOUS PERSONAL INJURY.

CAUTION

R-410A PRESSURES ARE APPROXIMATELY 60% HIGHER THAN R-22 PRESSURES. USE APPROPRIATE CARE WHEN USING THIS REFRIGERANT. FAILURE TO EXERCISE CARE MAY RESULT IN EQUIPMENT DAMAGE, OR PERSONAL INJURY.

Page 5

WARNING

TH E MANUFAC TUR ER’S WARRANTY DOES NOT COVER ANY DA MAGE OR DEFE CT TO THE AIR CONDITIONER CAUSED BY THE ATTACHMENT OR USE OF ANY COM P O NENTS. ACC E SSOR IES OR DEV ICES (OTH ER THAN THOSE AUTHORIZED BY THE M A NUFAC T U RER) IN T O, ONT O OR IN C ONJUN C T ION WI TH THE AIR CO NDI TIONER. YOU SHOULD BE AWARE THAT THE U SE OF UN AUTHO R IZED COMPONENTS, ACCESSORIES OR DEVICES MAY ADVERSELY AFF E C T TH E OPER A T ION OF THE AIR CONDITIONER AND MAY AL S O EN DANGE R LI F E AND PROPERTY. THE MANUFACTUR E R DIS C L AIMS ANY RES P O NSIBIL I TY FO R SU C H LO SS OR IN JUR Y RE SULTING FRO M THE USE OF SUCH UNAUTHORIZED COMPONENTS, ACCESSORIES OR DEVICES.

2.0 GENERAL INFORMATION

The (-)ASL-series of condensing units are designed to operate using the Comfort Control Comfort Control Control

• (-)ASL condensing unit equipped with the Comfort Control

• An air handler or furnace equipped with the Comfort Control

•

If your installation does not meet the above requirements, you must use traditional 24VAC controls.

T and setup using Comfort Control the Engineering Specification Sheets for complete performance data, thermostat, and accessory listings.

The information contained in this manual has been prepared to assist in the proper installation, operation and maintenance of the air conditioning system. Improper installation, or installation not made in accordance with these instructions, can result in unsatisfactory operation and/or dangerous conditions (noise and component failure), and can cause the related warranty not to apply.

Read this manual and any instructions packaged with separate equipment required to make up the system prior to installation. Retain this manual for future reference.

To achieve optimum efficiency and capacity, the indoor cooling coils listed in the condensing unit specification sheet should be used.

2.1 CHECKING PRODUCT RECEIVED

Upon receiving unit, inspect it for any shipping damage. Claims for damage, either apparent or concealed, should be filed immediately with the shipping company. Check condensing unit model number, electrical characteristics and accessories to determine if they are correct. Check system components (evaporator coil, condensing unit, evaporator blower, etc.) to make sure they are properly matched.

System™ or traditional 24VAC controls. These units are equipped with the

System™ :

A Comfort Control

his installation instruction manual contains complete instructions for installation

. Your installation must have these components to use Comfort

System™

hermostat

or conventional 24VAC controls. Please refer to

System™

MATCH ALL COMPONENTS:

• OUTDOOR UNIT

• INDOOR COIL/METERING DEVICE

• INDOOR AIR HANDLER/FURNACE

• REFRIGERANT LINES

2.2 APPLICATION

Before specifying any air conditioning equipment, a survey of the structure and a heat gain calculation must be made. A heat gain calculation begins by measuring all external surfaces and openings that gain heat from the surrounding air and quantifying that heat gain. A heat gain calculation also calculates the extra heat load caused by sunlight and by humidity removal.

Air conditioning systems are sized on the cooling load calculation. There are two capacities that enable the equipment to provide comfort. The first is sensible capacity.

Sensible heat is the heat energy measured on the dry bulb thermometer as it is added or removed.

The second form of heat is called latent or hidden heat. This is heat held in the humidity in the air.

A properly-sized unit removes both forms of heat, producing a comfortable living space. An oversized system cycles on and off too quickly and does not properly remove humidity, producing an uncomfortable living space. Select the indoor and outdoor equipment combination based on the manufacturer’s engineering data.

After the equipment combination has been selected, satisfying both sensible and latent conditioning requirements, the system must be properly installed. Only then can the unit provide the comfort the manufacturer intends.

There are several factors that the installers must consider:

• Outdoor unit location • Proper equipment evacuation

• System refrigerant charge • Indoor unit airflow

• Indoor unit blower speed • Supply and return air duct design and sizing

• System air balancing • Diffuser and return air grille location and sizing

Page 6

IR INLETS

(

LOUVERS)

LLOW 120 [305 mm]

IN. CLEARANCE

SIDES

AIR DISCHARGE

ALLOW 600 [1524 mm] CLEARANCE

ALLOW 240 [610 mm] ACCESS CLEARANCE

ACCESS PANEL

ALTERNATE HIGH VOLTAGE CONNECTION (KNOCKOUT) 1

/320[34 mm]

SERVICE F

ITTINGS

LOW VOLTAGE CONNECTION

/8"

[22 mm]

HIGH VOLTAGE CONNECTION 1

/32" [34 mm]

LIQUID LINE CONNECTION

SERVICE ACCESS TO ELECTRICAL & VALVES ALLOW 24" [610 mm] CLEARANCE ONE SIDE

/8" [73 mm] DIA. ACCESSORY KNOCKOUTS

VAPOR LINE CONNECTION

A-00002

2.3 DIMENSIONS

FIGURE 1

DIMENSIONS AND INSTALLATION CLEARANCES

AIR DISCHARGE

ALLOW 60" [1524 mm] CLEARANCE

ACCESS PANEL

LLOW 24" [610 mm]

A ACCESS CLEARANCE

UNIT MODEL NUMBER EXPLANATION

AIR INLETS (LOUVERS) ALLOW 6” [152 mm] MIN. CLEARANCE 3 SIDES

ALTERNATE LINE VOLTAGE

ENTRY (KNOCKOUT)

111⁄32" [34 MM]

CONNECT THE LINE

VOLTAGE CONDUIT TO

THE BOTTOM OF THE

CONTROL BOX

-)ASL – 036 JEC

(

L = DESIGN SERIES (R-410A)

S = 18 SEER

A = REMOTE CONDENSING UNIT

TRADE NAME

BASE PAN

C = EQUIPPED WITH THE

COMFORT CONTROL

- 208/230-1-60

NOMINAL CAPACITY)

( 024 = 24000 BTU/HR

036 = 36000 BTU/HR 039 = 39000 BTU/HR 048 = 48000 BTU/HR 060 = 60000 BTU/HR

SYSTEM™

LINE VOLTAGE

ENTRY

⁄8" [22 MM]

LINE VOLTAGE ENTRY

⁄32" [34 MM]

CONNECT THE LINE

VOLTAGE CONDUIT TO

THE BOTTOM OF THE

CONTROL BOX

SERVICE ACCESS FOR 024 & 036 MODELS

2.4 ELECTRICAL & PHYSICAL DATA

TABLE 1

(-)ASL-JEC ELECTRICAL DATA

Rev. 2/24/2010

Model

Number

RASL-

Phase

Frequency

(Hz)

Voltage

(Volts)

024JEC 1-60-208/230 10.3/10.3 52 0.5 14/14 20/20 20/20 15.8 [1.47] 1 2500 [1038] 144 [4082] 236 [107] 263.5 [119.5]

036JEC 1-60-208/230 16.7/16.7 82 2.8 24/24 30/30 40/40 23.01 [2.14] 1 3400 [1321] 150 [4252] 250.5 [113.6] 314.5 [142.7]

039JEC 1-60-208/230 17.9/17.9 96 2.8 26/26 30/30 40/40 23 [2.14] 2 3500 [1321] 268 [7598] 326 [147.9] 345 [156.5]

048JEC 1-60-208/230 26.9/26.9 117 2.8 37/37 45/45 60/60 23 [2.14] 2 3500 [1321] 253 [7173] 326 [147.9] 348 [157.9]

060JEC 1-60-208/230 28.2/28.2 146 2.8 39/39 50/50 60/60 23 [2.14] 2 3500 [1321] 241 [6832] 328 [148.8] 346 [156.9]

Rated Load

Amperes

ELECTRICAL PHYSICAL

Compressor

(RLA)

Locked

Rotor

Amperes

(LRA)

Fan

Motor

Full Load

Amperes

(FLA)

Minimum

Circuit

Ampacity

Amperes

SERVICE ACCESS FOR 039, 048 & 060 MODELS

Fuse or HACR

Circuit Breaker

Minimum

Amperes

Maximum

Amperes

HIGH LINE VOLTAGE 1

Face Area

Sq. Ft. [m

BOTTOM VIEW SHOWING DRAIN OPENINGS (\\\\\ SHADED AREAS).

SERVICE FITTING

LOW LINE VOLTAGE7⁄8"

⁄4"

Outdoor Coil Weight

No.

]

Rows

CFM [L/s}

LOW LINE VOLTAGE

⁄8"

Refrig.

Per Circuit Oz. [g]

LIQUID LINE CONNECTION

Net

Lbs. [kg]

VAPOR LINE CONNECTION

Shipping Lbs. [kg]

Page 7

2.5 PROPER INSTALLATION

Proper sizing and installation of this equipment is critical to achieve optimal performance. Use the information in this Installation Instruction Manual and reference the applicable Engineering Specification Sheet when installing this product.

IMPORTANT: This product has been designed and manufactured to meet ENERGY STAR

ents. However, proper refrigerant charge and proper airflow are critical to achieve

n rated capacity and efficiency. Installation of this product should follow the manufacturer’s refrigerant charging and airflow instructions. Failure to confirm proper

charge and airflow may reduce energy efficiency and shorten equipment life.

criteria for energy efficiency when matched with appropriate coil compo-

3.0 LOCATING UNIT

3.1 Corrosive Environment

The metal parts of this unit may be subject to rust or deterioration if exposed to a corrosive environment. This oxidation could shorten the equipment’s useful life. Corrosive elements include, but are not limited to, salt spray, fog or mist in seacoast areas, sulphur or chlorine from lawn watering systems, and various chemical contaminants from industries such as paper mills and petroleum refineries.

If the unit is to be installed in an area where contaminants are likely to be a problem, special attention should be given to the equipment location and exposure.

• Avoid having lawn sprinkler heads spray directly on the unit cabinet.

• In coastal areas, locate the unit on the side of the building away from the waterfront.

• Shielding provided by a fence or shrubs may give some protection, but cannot violate minimum airflow and service access clearances.

• Elevating the unit off its slab or base enough to allow air circulation will help avoid holding water against the basepan.

Regular maintenance will reduce the build-up of contaminants and help to protect the unit’s finish.

WARNING

DIS C O NNECT AL L POWE R T O UNIT B E FORE ST A RTING MAINTENANCE. FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

• Frequent washing of the cabinet, fan blade and coil with fresh water will remove most of the salt or other contaminants that build up on the unit.

• Regular cleaning and waxing of the cabinet with a good automobile polish will provide some protection.

• A good liquid cleaner may be used several times a year to remove matter that will not wash off with water.

Several different types of protective coatings are offered in some areas. These coatings may provide some benefit, but the effectiveness of such coating materials cannot be verified by the equipment manufacturer.

3.2 CONDENSER LOCATION

Consult local and national building codes and ordinances for special installation requirements. Following location information will provide longer life and simplified servicing of the outdoor condenser.

NOTE: These units must be installed outdoors. No ductwork can be attached, or other modifications made, to the discharge grille. Modifications will affect performance or operation.

Page 8

3.3 Operational Issues

• IMPORTANT: Locate the unit in a manner that will not prevent, impair or com-

promise the performance of other equipment horizontally installed in proximity to the unit. Maintain all required minimum distances to gas and electric meters, dryer vents, exhaust and inlet openings. In the absence of National Codes, or

anufacturers’ recommendations, local code recommendations and require-

m ments will take precedence.

• Refrigerant piping and wiring should be properly sized and kept as short as possible to avoid capacity losses and increased operating costs.

• Locate the unit where water run off will not create a problem with the equipment. Position the unit away from the drip edge of the roof whenever possible. Units are weatherized, but can be affected by the following:

o Water pouring into the unit from the junction of rooflines, without protective

guttering. Large volumes of water entering the heat pump while in operation can impact fan blade or motor life, and coil damage may occur to a heat pump if moisture cannot drain from the unit under freezing conditions.

o Freezing moisture, or sleeting conditions, can cause the cabinet to ice-over

prematurely and prevent heat pump operation, requiring backup heat, which generally results in less economical operation.

• Closely follow clearance recommendations on Page 6.

o 24” to the service panel access

o 60” above heat pump fan discharge (unit top) to prevent recirculation

o 6” to heat pump coil grille air inlets

3.4 For Units With Space Limitations

FOR CONDENSERS WITH SPACE LIMITATIONS

In the event that a space limitation exists, we will permit the following clearances:

Single Unit Applications: Clearances below 6 inches will reduce unit capacity and efficiency. Do not reduce the 60-inch discharge, or the 24-inch service clearances.

Multiple Unit Applications: When multiple condenser grille sides are aligned, a 6inch per unit clearance is recommended, for a total of 12” between two units. Two combined clearances below 12 inches will reduce capacity and efficiency. Do not reduce the 60-inch discharge, or 24-inch service, clearances.

3.5 Customer Satisfaction Issues

• The condensing unit should be located away from the living, sleeping and recreational spaces of the owner and those spaces on adjoining property.

• To prevent noise transmission, the mounting pad for the outdoor unit should not be connected to the structure, and should be located sufficient distance above grade to prevent ground water from entering the unit.

3.6 Unit Mounting

If elevating the condensing unit, either on a flat roof or on a slab, observe the following guidelines.

• The base pan provided elevates the heat pump 3/4” above the base pad.

• If elevating a unit on a flat roof, use 4” x 4” (or equivalent) stringers positioned to distribute unit weight evenly and prevent noise and vibration (see Figure 2).

NOTE: Do not block drain openings shown in Figure 1.

3.7 Factory-Preferred Tie-Down Method for Outdoor Units

IMPORTANT: The Manufacturer approved/recommended method is a guide to securing equipment for wind and seismic loads. Other methods might provide the same result, but the Manufacturer method is the only one endorsed by Manufacturer for securing equipment where wind or earthquake damage can occur. Additional information is available in the PTS (Product Technical Support) section of the Manufacturer website Rheemote.net and can be found as a listing under each outdoor model. If you do not have access to this site, your Distributor can offer assistance.

Page 9

FIGURE 2

ECOMMENDED ELEVATED INSTALLATION

4.0 REFRIGERANT CONNECTIONS

All units are factory charged with Refrigerant 410A. All models are supplied with service valves. Keep tube ends sealed until connection is to be made to prevent system contamination.

4.1 Tools Required For Installing & Servicing R-410A Models

Manifold Sets:

-Up to 800 PSIG High side

-Up to 250 PSIG Low Side

-550 PSIG Low Side Retard

Manifold Hoses:

-Service Pressure Rating of 800 PSIG

Recovery Cylinders:

-400 PSIG Pressure Rating

-Dept. of Transportation 4BA400 or BW400

CAUTION

R-410A systems operate at higher pressures than R-22 systems. Do not use R-22 service equipment or components on R-410A equipment.

Page 10

IMPORTANT: The Rheem approved/recommended method is a guide to securing equipment for wind and seismic loads. Other methods might provide the same result, but the Rheem method is the only one endorsed by Rheem for securing equipment where wind or earthquake damage can occur. Additional information is available in the PTS (Product Technical Support) section of the Rheem website Rheemote.net and can be found as a listing under each outdoor model. If you do not have access to this site, your Distributor can offer assistance.

4.2 Specifications of R-410A:

Application: R-410A is not a drop-in replacement for R-22; equipment designs must accommodate its higher pressures. It cannot be retrofitted into R-22 heat pumps.

Physical Properties: R-410A has an atmospheric boiling point of -62.9°F and its saturation pressure at 77°F is 224.5 psig.

Composition: R-410A is an azeotropic mixture of 50% by weight difluoromethane (HFC-32) and 50% by weight pentafluoroethane (HFC-125).

Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than R-22. Recovery and recycle equipment, pumps, hoses and the like need to

have design pressure ratings appropriate for R-410A. Manifold sets need to range up to 800 psig high-side and 250 psig low-side with a 550 psig low-side retard. Hoses need to have a service pressure rating of 800 psig. Recovery cylinders need to have a 400 psig service pressure rating. DOT 4BA400 or DOT BW400.

Combustibility: At pressures above 1 atmosphere, mixture of R-410A and air can become combustible. R-410A and air should never be mixed in tanks or supply

lines, or be allowed to accumulate in storage tanks. Leak checking should never be done with a mixture of R-410A and air. Leak checking can be per-

formed safely with nitrogen or a mixture of R-410A and nitrogen.

4.3 Quick Reference Guide For R-410A

• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-22. Ensure that servicing equipment is designed to operate with R-410A.

• R-410A refrigerant cylinders are pink in color.

• R-410A, as with other HFC’s is only compatible with POE oils.

• Vacuum pumps will not remove moisture from oil.

• R-410A systems are to be charged with liquid refrigerants. Prior to March 1999, R-410A refrigerant cylinders had a dip tube. These cylinders should be kept upright for equipment charging. Post March 1999 cylinders do not have a dip tube and should be inverted to ensure liquid charging of the equipment.

• Do not install a suction line filter drier in the liquid line.

• A liquid line filter drier is standard on every unit. Only manufacturer approved liquid line filter driers can be used. These are Sporlan (CW083S) and Alco (80K083S) driers. These filter driers are rated for minimum working pressure of 600 psig.

• Desiccant (drying agent) must be compatible for POE oils and R-410A.

Page 11

5.0 REPLACEMENT UNITS

To prevent failure of a new condensing unit, the existing evaporator tubing system must be correctly sized and cleaned or replaced. Care must be exercised that the expansion device is not plugged. For new and replacement units, a liquid line filter drier should be installed and refrigerant tubing should be properly sized. Test the oil for acid. If positive, a suction line filter drier is mandatory.

IMPORTANT: WHEN REPLACING AN R-22 UNIT WITH AN R-410A UNIT, EITHER REPLACE THE LINE SET OR ENSURE THAT THE EXISTING LINE SET IS THOROUGHLY CLEANED OF ANY OLD OIL OR DEBRIS.

6.0 INDOOR COIL

REFER TO INDOOR COIL MANUFACTURER’S INSTALLATION INSTRUCTIONS.

IMPORTANT: The manufacturer is not responsible for the performance and opera-

tion of a mismatched system, or for a match listed with another manufacturer’s coil.

NOTE: All (-)ASL units must be installed with a TXV Evaporator.

CAUTION

The thermostatic expansion valve is specifically designed to operate with R-410A.

DO NOT use an R-22 TXV or evaporator. The existing evaporator must be replaced with the factory specified TXV evaporator specifically designed for R-410A.

6.1 Location

Do not install the indoor coil in the return duct system of a gas or oil furnace. Provide a service inlet to the coil for inspection and cleaning. Keep the coil pitched toward the drain connection.

CAUTION

Whe n coil i s ins t alled over a finis hed ce i ling a nd/or livin g area , it is rec o m mended that a seconda r y shee t metal c ondens a te pan b e construct ed and in stalled under entire unit. Failure to do so ca n result in property damage.

7.0 INTERCONNECTING TUBING

7.1 Vapor and Liquid Lines

Keep all lines sealed until connection is made.

Make connections at the indoor coil first.

Refer to Line Size Information in Tables 3, 4, 5 and 6 for correct size and multipliers to be used to determine capacity for various vapor line diameters and lengths of run. The losses due to the lines being exposed to outdoor conditions are not included.

The factory refrigeration charge in the outdoor unit is sufficient for 15 feet of interconnecting lines. The factory refrigeration charge in the outdoor unit is sufficient for the unit and 15 feet of standard size interconnecting liquid and vapor lines. For different lengths, adjust the charge as indicated below.

1/4” ± .3 oz. per foot 5/16” ± .4 oz. per foot 3/8” ± .6 oz. per foot 1/2” ± 1.2 oz. per foot

Page 12

TABLE 3

APOR LINE CAPACITY MULTIPLIER

(-)ASL

Unit Vapor Line

Connection Size

(inches I.D.) [mm]

Vapor Line Run

Feet [m]

25‘ [7.62]

50’ [15.24]

75’ [22.86]

100’ [30.48]

125’ [38.10]

150’ [45.72]

NOTES:

1. Do NOT exceed the limits in the liquid and suction line sizing charts.

2. Do NOT use 7/8 OD suction lines in 2 or 4-ton applications.

3. Do NOT use 1-1/8 OD suction line in ANY application.

4. Line sets over 75 feet MUST use the optional suction line.

Opt.

Std.

Opt.

Std.

Opt.

Std.

Opt.

Std.

Opt.

Std.

Opt.

Std.

024

3/4” [19.05] I.D.

Sweat

5/8” [15.88]

Optional

3/4” [19.05]

Standard

1.00 0.99 0.99 0.98 0.99

1.00 1.00 1.00 1.00 1.00

0.98 0.98 0.97 0.96 0.98

1.00 1.00 0.99 0.99 0.99

0.98 0.96 0.96 0.94 0.96

1.00 0.99 0.99 0.98 0.99

0.98 0.95 0.95 0.92 0.95 N/A N/A N/A N/A N/A

0.96 0.94 0.93 0.90 0.94 N/A N/A N/A N/A N/A

0.96 0.92 0.91 0.88 0.93 N/A N/A N/A N/A N/A

036 039 048 060

3/4” [19.05] I.D.

Sweat

Vapor Line Diameter (inches O.D.) [mm]

5/8” [15.88]

Optional

3/4” [19.05]

Standard

3/4” [19.05] I.D.

Sweat

5/8” [15.88]

Optional

3/4” [19.05]

Standard

3/4” [19.05] I.D.

Sweat

5/8” [15.88]

Optional

3/4” [19.05]

Standard

7/8” [22.23] I.D.

Sweat

3/4” [19.05]

Optional

7/8” [22.23]

Standard

7.2 Maximum Length of Lines

The maximum length of interconnecting line is 150 feet. Always use the shortest length possible with a minimum number of bends. Additional compressor oil is not required for any length up to 150 feet.

NOTE: Excessively long refrigerant lines cause loss of equipment capacity.

7.3 Outdoor Unit Installed Above or Below Indoor Coil

Use the following guidelines when installing the unit:

1. Expansion Valve Coil:

a. The vertical separation cannot exceed the value in Tables 4, 5, and 6.

b. No changes are required for expansion valve coils.

2. It is recommended to use the smallest liquid line size permitted to minimize the system charge.

3. Tables 4, 5, and 6 may be used for sizing horizontal runs.

7.4 Tubing Installation

Observe the following when installing correctly sized type “L” refrigerant tubing between the condensing unit and evaporator coil:

• If a portion of the liquid line passes through a hot area where liquid refrigerant can be heated to form vapor, insulating the liquid line is required.

• Use clean, dehydrated, sealed refrigeration grade tubing.

• Always keep tubing sealed until tubing is in place and connections are to be made.

• Blow out the liquid and vapor lines with dry nitrogen before connecting to the outdoor unit and indoor coil. Any debris in the line set will end up plugging the expansion device.

• As an added precaution, a high quality filter drier is standard on R-410A units.

• Do not allow the vapor line and liquid line to be in contact with each other. This causes an undesirable heat transfer resulting in capacity loss and increased power consumption. The vapor line must be insulated.

• If tubing has been cut, make sure ends are deburred while holding in a position to prevent chips from falling into tubing. Burrs such as those caused by tubing cutters can affect performance dramatically, particularly on small liquid line sizes.

Page 13

TABLE 4

(-)ASL LIQUID LINE SIZING

IQUID LINE SIZE - OUTDOOR UNIT ABOVE INDOOR COIL

Liquid Line Size

R-410A

System

Capacity

Model

-024 3/8” [9.53] 5/16” [7.93] 000000

-036 3/8” [9.53] 3/8” [9.52]* 00 0000

-039 3/8” [9.53] 3/8” [9.52] 00 0000

-048 3/8” [9.53]

-060 3/8” [9.53]

NOTES: N/A = Application Not Recommended *Standard Line Size

LIQUID LINE SIZE - OUTDOOR UNIT BELOW INDOOR COIL

R-410A

System

Capacity

Model

-024 3/8” [9.53] 5/16” [7.93] 25 [14.33] 44 [13.41] 40 [12.19] 36 [10.97] 30 [9.14] 24 [7.32]

-036 3/8” [9.53] 3/8” [9.52]* 12 [3.66] 9 [2.74] N/A N/A N/A N/A

-039 3/8” [9.53] 3/8” [9.52] 18 [5.49] 17 [5.18] 15 [4.57] 13 [3.96] 12 [3.66] 10 [3.05]

-048 3/8” [9.53] 3/8” [9.52] 25 [11.89] 36 [10.97] 34 [10.36] 32 [9.75] 29 [8.84] 23 [7.01]

-060 3/8” [9.53]

NOTES: N/A = Application Not Recommended *Standard Line Size

Line Size

Connection

Size (Inch I.D.) [mm]

Line Size

Connection

Size (Inch I.D.) [mm]

Line Size

(Inch O.D.)

[mm]

Outdoor Unit Above Indoor Coil (Cooling Only - Does not apply to Heat Pumps)

Total Equivalent Length - Feet [m]

25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]

Minimum Vertical Separation - Feet [m]

1/4” [6.35]* 0010 [3.05] 34 [10.36] 58 [17.68] 82 [24.99]

3/8” [9.52] 000000

5/16” [7.93] 006 [1.83] 14 [4.27] 21 [6.40] 28 [8.53]

1/2” [12.70] 000000

5/16” [7.93]* 000010 [3.05] 24 [7.32]

1/2” [12.70] 000000

5/16” [7.93]* 00018 [5.49] 40 [12.19] 62 [18.90]

3/8” [9.52] 000000

1/2” [12.70] 000000

3/8” [9.52]* 000000

1/2” [12.70] 000000

Liquid Line Size

Line Size

(Inch O.D.)

[mm]

25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]

Outdoor Unit Below Indoor Coil

Total Equivalent Length - Feet [m]

Maximum Vertical Separation - Feet [m]**

1/4” [6.35]* 25 [11.28] 13 [3.96] N/A N/A N/A N/A

3/8” [9.52] 25 [15.24] 48 [14.63] 47 [14.33] 46 [14.02] 45 [13.72] 43 [13.11]

5/16” [7.93] N/A N/A N/A N/A N/A N/A

1/2” [12.70] 14 [4.27] 13 [3.96] 13 [3.96] 12 [3.66] 12 [3.66] 11 [3.35]

5/16” [7.93]* 15 [4.57] 11 [3.35] N/A N/A N/A N/A

1/2” [12.70] 20 [6.10] 19 [5.79] 19 [5.79] 19 [5.79] 18 [5.49] 18 [5.49]

5/16” [7.93]* 25 [10.36] 24 [7.32] N/A N/A N/A N/A

1/2” [12.70] 25 [12.50] 40 [12.19] 40 [12.19] 39 [11.89] 39 [11.89] 38 [11.58]

3/8” [9.52]* 25 [11.28] 33 [10.06] 30 [9.14] 25 [7.62] 15 [4.57] N/A

1/2” [12.70] 25 [11.89] 39 [11.89] 38 [11.58] 37 [11.28] 37 [11.28] 36 [10.97]

**Maximum vertical separation listed in table can be exceeded if system is charged to 8°-10°F liquid subcooling level at the indoor coil. A gauge port must be added to the liquid line near the indoor coil to measure subcooling at that point.

Page 14

ABLE 5

-)ASL SUCTION LINE SIZING

(

UCTION LINE SIZE - OUTDOOR UNIT ABOVE INDOOR COIL

R-410A System

Capacity

Model

Line Size

Connection

Size (Inch I.D.) [mm]

Line Size

(Inch O.D.)

[mm]

Outdoor Unit ABOVE Indoor Coil (Cooling Only - Does not apply to Heat Pumps)

Total Equivalent Length - Feet [m]

Suction Line Size

25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]

5/8” [15.88] Same as Liquid Line Size Table

-024 3/4” [19.05] 3/4” [19.05]* NA

7/8” [22.23] NA

5/8” [15.88] Same as Liquid Line Size Table

-036 & -039 3/4” [19.05] 3/4” [19.05]* NA

7/8” [22.23] NA

5/8” [15.88] Same as Liquid Line Size Table

-048 7/8” [22.22] 3/4” [19.05]* Same as Liquid Line Size Table

7/8” [22.23] NA

3/4” [19.05] Same as Liquid Line Size Table

-060 7/8” [22.22] 7/8” [22.23]* NA

1-1/8” [28.58] NA

NOTES: Using suction line larger than shown in chart will result in poor oil return. N/A = Application Not Recommended *Standard Line Size

UCTION LINE SIZE - OUTDOOR UNIT BELOW INDOOR COIL

R-410A

System

Capacity

Model

Line Size

Connection

Size

(Inch I.D.)

[mm]

Line Size

(Inch O.D.)

[mm]

Outdoor Unit BELOW Indoor Coil (Cooling Only - Does not apply to Heat Pumps)

Total Equivalent Length - Feet [m]

Suction Line Size

25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]

5/8” [15.88] Same as Liquid Line Size Table

-024 3/4” [19.05] 3/4” [19.05]* Same as Liquid Line Size Table NA

7/8” [22.23] NA

5/8” [15.88] Same as Liquid Line Size Table

-036 & -039 3/4” [19.05] 3/4” [19.05]* Same as Liquid Line Size Table

7/8” [22.23] NA

5/8” [15.88] Same as Liquid Line Size Table

-048 7/8” [22.22] 3/4” [19.05]* Same as Liquid Line Size Table

7/8” [22.23] Same as Liquid Line Size Table NA

3/4” [19.05] Same as Liquid Line Size Table

-060 7/8” [22.22] 7/8” [22.23]* Same as Liquid Line Size Table

1-1/8” [28.58] NA

NOTES: Using suction line larger than shown in chart will result in poor oil return. N/A = Application Not Recommended *Standard Line Size

Page 15

• For best operation, keep tubing run as short as possible with a minimum num-

ber of elbows or bends.

• Locations where the tubing will be exposed to mechanical damage should be

avoided. If it is necessary to use such locations, the copper tubing should be

oused to prevent damage.

• If tubing is to be run underground, it must be run in a sealed watertight chase.

• Use care in routing tubing and do not kink or twist. Use a good tubing bender

n the vapor line to prevent kinking.

• Route the tubing using temporary hangers, then straighten the tubing and

install permanent hangers. Line must be adequately supported.

The vapor line must be insulated to prevent dripping (sweating) and prevent

•

performance losses. Armaflex and Rubatex are satisfactory insulations for this purpose. Use 1/2” minimum insulation thickness, additional insulation may be required for long runs.

• Check Table 3 for the correct vapor line size. Check Table 4 for the correct liq-

uid line size.

7.5 Tubing Connections

Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made.

• Use type “L” copper refrigeration tubing. Braze the connections with the follow-

ing alloys:

– copper to copper - 5% – Silver alloy (no flux) – copper to steel or brass - 35% – silver alloy (with flux)

• Be certain both refrigerant shutoff valves at the outdoor unit are closed.

• Clean the inside of the fittings and outside of the tubing with steel wool or sand

cloth before soldering. Always keep chips, steel wool, dirt, etc., out of the inside when cleaning.

• Assemble tubing part way into fitting. Apply flux all around the outside of the

tubing and push tubing into stop. This procedure will keep the flux from getting inside the system.

• Remove the cap and schrader core from service port to protect seals from heat

damage.

• Use an appropriate heatsink material around the copper stub and the service

valves before applying heat.

• IMPORTANT: Do not braze any fitting with the TEV sensing bulb attached.

• Braze the tubing between the outdoor unit and indoor coil. Flow dry nitrogen

into a service port and through the tubing while brazing.

• After brazing – use an appropriate heatsink material to cool the joint and

remove any flux residue.

• The service valves are not backseating valves. To open the valves, remove the

valve cap with an adjustable wrench. Insert a 3/16” or 5/16” hex wrench into the stem. Back out counterclockwise.

• Replace the valve cap finger tight then tighten an additional 1/2 hex flat for a

metal-to-metal seal.

7.6 Leak Testing

• Pressurize line set and coil through service fittings with dry nitrogen to 150

PSIG maximum. Leak test all joints using liquid detergent. If a leak is found, recover pressure and repair.

WARNING

DO NOT USE OXYGEN TO PURGE LINES OR PRESSURIZE SYSTEM FOR LEAK TEST. OXYGE N REAC TS VIOLENTLY WITH OIL, WHI CH CAN CAUSE AN EXPLOSION RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

Page 16

8.0 DUAL DRIVE COMPRESSORS

The -039, -048, & -060 condensing units contain two compressors to deliver maximum efficiency and comfort. The Dual Drive Compressors are sized to increase run times at first stage operation (partial capacity). When additional capacity is needed, a two stage thermostat energizes both compressors to deliver full rated capacity.

8.1 Compressor Identification

The individual compressors are identified as Compressor A and Compressor B. When facing the access panel, Compressor A is on the left and Compressor B is on the right. (See Figure 4.)

FIGURE 4

DUAL DRIVE COMPRESSORS

COMPRESSOR A COMPRESSOR B

8.2 Comfort Control2System™ Control Identification

The Dual Drive condensing units use one (1) serial communicating control per compressor. There is a label in the control box that identifies each control/compressor combination. When facing the access panel, Compressor A is controlled by the lefthand board and Compressor B is controlled by the right-hand board.

FIGURE 5

Page 17

8.3 Comfort Control2System™ Control Operation

A Dual Drive unit has two controls instead of a single control. The controls are the same as any residential communicating control except the secondary control dipswitches (SW5) should be in the off position. Therefore, the features such as fault recall and the operation of the test button are the same as any JEC control.

The two controls are identical and interchangeable, but the memory cards that attach to the controls are not interchangeable. This allows the controls to be swapped for troubleshooting if one of the controls is suspected of being defective. If the controls are swapped, it is important to keep the memory cards in the proper locations. Do not cut the tethers on the memory cards!

8.4 Lead/Lag

Tandem compressor ASL units now have a Lead/Lag functionality built into the control software. The purpose of Lead/Lag is to average the runtime of the compressors to give the homeowner the greatest compressor life possible. Upon receiving a first stage call, the primary compressor control (the control on the left as you face the control box) will alternate which compressor services the call. An example of Lead/Lag is: if compressor A is energized on one first stage call, compressor B would normally service the next first stage call.

9.0 COMPRESSOR CRANKCASE HEAT (CCH)

CCH is standard on these models due to refrigerant migration during the off cycle that can result in a noisy start up.

Crankcase Heater Operation:

Supplemental Crankcase heat is required to prevent refrigerant migration in systems with relatively high system refrigerant charges. Each Dual Drive compressor has its own crankcase heater.

The crankcase heater control is integrated into the Comfort Control is designed for maximum energy savings.

Summary of operation:

• The crankcase heater is off whenever the compressor is running.

• Once the compressor turns off, the crankcase heater control (CCH) begins the

two-hour timer countdown.

• If the compressor stays off for two hours, the CCH turns on the crankcase heater.

All heaters are located on the lower half of the compressor shell. Its purpose is to drive refrigerant from the compressor shell during long off cycles, thus preventing damage to the compressor during start-up.

At initial start-up or after extended shutdown periods, make sure the heater is energized for at least 12 hours before the compressor is started. (Disconnect switch on and wall thermostat off.)

System™ and

10.0 HARD START COMPONENTS

Factory-installed start components are standard on all models.

11.0 HIGH AND LOW PRESSURE CONTROLS

10.0 (HPC AND LPC)

These controls keep the compressor from operating in pressure ranges which can cause damage to the compressor. Both controls are in the low voltage control circuit.

High pressure control (HPC) is an automatic-reset which opens near 610 PSIG and closes near 420 PSIG.

The low pressure control (LPC) is an automatic-reset which opens near 50 PSIG and closes near 95 PSIG.

NOTE: HPC and LPC are monitored by the Comfort Control2System™. See Section 12.0.

Page 18

CAUTION

11.1 Evacuation Procedure

Evacuation 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 and moisture from the system.

Air in the system causes high condensing temperatures and pressure, resulting in increased power input and non-verifiable performance.

Moisture chemically reacts with the refrigerant and oil to form corrosive hydrofluoric and hydrochloric acids. These attack motor windings and parts, causing breakdown.

After the system has been leak checked and proven sealed, connect the vacuum pump and evacuate system to 500 microns. The vacuum pump must be connected to both the high and low sides of the system through adequate connections. Use the largest size connections available since restrictive service connections may lead to false readings because of pressure drop through the fittings.

IMPORTANT: Compressors (especially scroll type) should never be used to evacuate the air conditioning system because internal electrical arcing may result in a damaged or failed compressor.

With thermostat in the “Off” position, turn the power on to the furnace and the heat pump. Start the heat pump and the furnace with the thermostat. Make sure the blower is operating.

12.0 CONDENSING UNITS EQUIPPED WITH THE

11.0 COMFORT CONTROL

Comfort Control2is the next generation of the Integrated Compressor Control (ICC)

SYSTEM™ CONTROL WIRING

COMFORT CONTROL

and is an integral part of the Comfort Control

12.1 Control Description (see Figure 4)

Dual 7-Segment LED

• Displays status and diagnostic codes (See Status and Diagnostic Description)

• Displays diagnostic/fault recall (See Test Mode/Fault Recall)

Red LED (Y1)

• Y1 red LED (solid on) indicates Y1 call from thermostat is present

CAUTION

Line Voltage Connector

• Line voltage is connected to control board at lug terminals L1 & L2

• Maximum wire size accepted is 6 AWG copper wire

• # 4 – 6 AWG 45 in/lbs

# 8 AWG 40 in/lbs # 10 – 14 AWG 35 in/lbs (Check wire terminations annually)

SYSTEM™

System™ with the following features:

Page 19

Compressor Control (K2)

• Sealed single pole compressor relay switch with optical feedback feature (arc

detection)

Thermostat Connector (E2)

• R – 24VAC from the indoor unit 24VAC transformer (40 VA minimum)

• C – 24VAC Common from the indoor unit 24VAC transformer

• 1-Data: System Communications Line 1

• 2-Data: System Communications Line 2

Low Volt Fuse

• If required replace with 3 A automotive ATC style blade fuse

Low Pressure Control (LPC Input)

• Low-pressure control is factory installed

• Low pressure control is an automatic resetting device

High Pressure Control (HPC Input)

• High-pressure control is factory installed

• High pressure control is an automatic resetting device

Ambient Temperature Sensor (included with all applications)

• Included with all applications

TEST and SW2 Buttons

• TEST and SW2 buttons used to enter Test and Fault Recall Mode

COMFORT CONTROL

FIGURE 6

COMFORT CONTROL2BOARD

COMPRESSOR WIRING CONNECTOR

{

Memory Card

• The memory card stores all unit information.

• The unit information is called shared data.

• The shared data is all the information needed for proper unit operation.

O.D. FAN (OFM) RELAY

LOW PRESSURE CONTROL INPUT

HIGH PRESSURE CONTROL INPUT

MEMORY CARD

LOW VOLT FUSE

THERMOSTAT CONNECTION (E2)

RED LED (Y1)

SYSTEM™ CONTROL WIRING

LINE VOLTAGE CONNECTION

COMPRESSOR CONTROL (K2)

ICC (INTEGRATED COMPRESSOR CONTROL)

SW2 BUTTON

TEST BUTTON

AMBIENT DEFROST CONTROL

DEFROST SENSOR

7-SEGMENT LED

Page 20

12.2 Comfort Control2System™ Control Wiring

Indoor Unit

WIRING INFORMATION Line Voltage –Field Installed - - - - - –Factory Standard

Communicating Thermostat

Outdoor Unit

An HVAC system equipped with Comfort Control2System™ consists of:

• Heat pump or condensing unit equipped with Comfort Control

• Air handler or furnace equipped with Comfort Control

• Comfort Control2thermostat

The four 18AWG low voltage control wires must be installed from the thermostat to the indoor unit and from indoor unit to the outdoor unit. The wire length between the thermostat and indoor unit should not be greater than 100 feet. The wire length between the indoor unit and outdoor unit should not be greater than 125 feet.

IIMMPPOORRTTAANNTT::

If the installed system does not meet these requirements, the system must be wired using traditional control wiring, reference Section 12.7 Conventional 24VAC Thermostat Control Wiring.

Serial communications require four (4) control wires for unit operation:

R – 24VAC

C – 24VAC common

1 – Data wire 1

2 – Data wire 2

NNoottee::

Comfort Control2System™ requires 18 AWG thermostat wire.

NNoottee::

TERM dipswitches should be in ON position.

FIGURE 7

TYPICAL COMFORT CONTROL2SYSTEM™ WIRING DIAGRAM

SYSTEM™ CONTROL WIRING

COMFORT CONTROL

If the low voltage control wiring is run in conduit with the power supply, Class I insulation is required. Class II insulation is required if run separate. Low voltage wiring may be run through the insulated bushing provided in the 7/8 hole in the base panel, up to and attached to the pigtails from the bottom of the control box. Conduit can be run to the base panel if desired by removing the insulated bushing.

The serial communicating air handler or serial communicating furnace transformer is equipped with a 24 volt, 50 VA transformer for proper system operation. See the wiring diagram in Figure 5 for reference.

12.3 Comfort Control2System™ Diagnostic Codes in Dual Drive

12.3 Condensing Units

Comfort Control2System™ controls for both compressors are connected to the serial communicating network via Data Wire 1 and Data Wire 2. Each Comfort Control System™ control board maintains separate fault history for the compressor it controls. Fault codes for both compressors can be retrieved using a service tool or via the installer menus.

Page 21

12.4 Comfort Control2ICC Control Operation

igure X – Typical Serial Communication Wiring Diagram

Zero (0) displayed The unit is in standby

IInnssttaallllaattiioonn VVeerriiffiiccaattiioonn

• 24V AC power on R&C must be present at the ICC for it to operate

• Line voltage must be present at the ICC for the compressor and the outdoor fan to operate

• The ICC displays a “0” for standby mode. Standby mode indicates line voltage and 24VAC are present at the ICC and there is not a command for unit operation from the serial communicating thermostat.

Zero (0) displayed The unit is in standby

CCoomm mmaanndd ffoorr CCoommpprreessssoorr OOppeerraatt iioonn ((YY11 LLEEDD))

• If a command for compressor operation is received by the ICC (first stage/second stage cooling or first stage/second stage heating), the red Y1 LED will illuminate.

• The ICC has an on/off fan delay of one (1) second for each stage of heating or cooling.

• The ICC ignores the low pressure control for the first 90 seconds of compressor operation.

• The dual 7-segment LED displays five (5) operational status codes.

11)) FFiirrsstt SSttaaggee CCoooolliinngg OOppeerraattiioonn

stage cooling operation, a lower case “c” is displayed on the dual 7-segment LEDs.

Lower case “c” indicates first stage cooling operation

22)) SSeeccoonndd SSttaaggee CCoooolliinngg OOppeerraatt ii oonn

second stage cooling operation, an upper case “C” is displayed on the dual 7segment LEDs.

Upper case “C” indicates second stage cooling operation

33--mmiinnuuttee AA nnttii--sshhoorrtt CCyyccllee TTiimmeerr

• The ICC has a built in 3-minute time delay between compressor operations to protect the compressor against short cycling. The dual 7-segment LEDs will flash “c” or “C” while the short cycle timer is active and a command for unit operation is received.

– When the ICC receives a command for first

– When the ICC receives a command for

COMFORT CONTROL

SERIAL COMMUNICATIONS CONTROL WIRING

SYSTEM™ CONTROL WIRING

• The 3-minute time delay can be bypassed when a command for compressor operation is present by pressing the TEST button for 1 second and releasing. The compressor will begin operation and the dual 7-segment will stop flashing.

Flashing lower case c A command for first stage cooling has been received

Flashing upper case C A command for second stage cooling has been received

Page 22

3300 SSeeccoonndd MMiinniimmuumm RRuunn TTiimmeerr

• The ICC has a built in 30 second minimum unit run time. If a command for compressor operation is received by the ICC and the command is removed, the compressor will continue to operate for 30 seconds. The dual 7-segment LEDs will flash “c” or “C” while the minimum run timer is active.

11 SSeeccoonndd CCoommpprreessssoorr//FFaann DDeellaayy

• The ICC starts/stops the outdoor fan one (1) second after the start/stop of the compressor upon a command for compressor operation to minimize current inrush and/or voltage drop.

12.5 Active Compressor Protection Mode

• The ICC actively protects the compressor from harmful operation during a fault condition.

• When the ICC detects a condition that could damage the compressor, the ICC will enter active protection mode and lockout compressor operation

• The condition causing active protection must be resolved then the ICC can be reset to restart the system.

• There are five (5) active protection modes:

11)) LLooww PPrreessssuurree CCoonnttrrooll LLoocckkoouutt

• The ICC will display a flashing “L” followed by a flashing 21 when a low pressure control lockout occurs.

• The ICC addresses low pressure control faults differently depending on the mode of unit operation (cooling or heating mode).

SYSTEM™ CONTROL WIRING

CCoooolliinngg MMooddee

• If the LPC opens three (3) times during the same command for cooling operation, the ICC will lockout the compressor to keep it from continuing to operate and flash a L” on the dual 7-segment LEDs followed by a “21”.

IIMMPPOORRTTAANNTT::

22)) HHiigghh PPrreessssuurree CCoonnttrrooll LLoocckkoouutt

• If the HPC opens three (3) times during the same command for unit operation, the ICC will lockout the compressor to keep it from continuing to operate and flash a L” on the dual 7-segment LEDs followed by a “29”.

Active Protection – Code L21 – Open low pressure control

This mode of active protection must be manually reset.

COMFORT CONTROL

2 1

2 9

Active Protection – Code L29 – Open high pressure control

IIMMPPOORRTTAANNTT::

33)) LLoocckkeedd RRoottoorr

• The ICC will display a flashing “L” followed by a flashing “04” when a locked rotor condition occurs.

This mode of active protection must be manually reset.

Page 23

0 4

Active Protection – Code L4 – Locked rotor

If the ICC detects the compressor has run less than 15 seconds before the protector tripped for four (4) consecutive starts during the same command for unit operation, the ICC will lockout the compressor to keep it from continuing to operate and flash a “L” on the dual 7-segment LEDs followed by a “04”.

IIMMPPOORRTTAANNTT::

44)) CCoommpprreessssoorr PPrrootteeccttoorr TTrriipp

• If ICC detects a protector trip it will display a “P”. If protector doesn’t reset within 4 hours, the ICC display will change to “5”.

This mode of active protection must be manually reset.

Compressor Protector – Code P – Protector Trip

55)) OOppeenn SSttaarrtt CCiirrccuuiitt LLoocckkoouutt

• The ICC will display a flashing “L” followed by a flashing “06” when an open start circuit condition occurs.

COMFORT CONTROL

SYSTEM™ CONTROL WIRING

0 6

Active Protection – Code L6 – Compressor open start circuit

If the ICC lockouts L6 and L7 detect current in the run circuit without current present in the start circuit, the ICC will lockout the compressor to keep it from continuing to operate and flash a “L” on the dual 7-segment LEDs followed by a “06”.

IIMMPPOORRTTAANNTT::

66)) OOppeenn RRuunn CCiirrccuuiitt LLoocckkoouutt

• The ICC will display a flashing “L” followed by a flashing “07” when an open start circuit condition occurs.

This mode of active protection must be manually reset.

0 7

Active Protection – Code L7 – Compressor open run circuit

If the ICC detects current in the start circuit without current present in the run circuit, , the ICC will lockout the compressor to keep it from continuing to operate and flash a “L” on the dual 7-segment LEDs followed by a “07”.

Page 24

IIMMPPOORRTTAANNTT::

Lower case “t”

Fault Recall Mode – the top and bottom segments illuminated

EExxiittiinngg AAccttiivvee CCoommpprreessssoorr PPrrootteeccttiioonn LLoocckkoouutt

Three are three methods to reset the ICC after an active protection lockout:

1) Cycle the line voltage to the unit

2) Cycle 24VAC to the ICC (remove the R or C connection to the ICC)

3) Push the TEST button down with an insulated probe for one (1) second and release

Note: The ICC will attempt to start the unit when the TEST button is pressed and released

NNoottee::

The preferred method of resetting the ICC is to push the TEST button down

for one (1) second.

This mode of active protection must be manually reset.

12.6 Test and Fault Recall Modes

TTeesstt MMooddee ((TTeesstt BB uuttttoonn oonn tthhee IICCCC))

• Enter TEST mode by pressing the TEST button with an insulated probe for one (1) second and release.

• The TEST mode causes the ICC to do the following

1) Resets the ICC from active protection lockout mode

2) Bypasses the 3-minute anti-short cycle timer

3) Energizes the unit without a command for unit operation

• If the 3-minute anti-short cycle timer or 30 second minimum run timer is active (a flashing “c”, “C”, “h”, or “H” is displayed on the dual 7-segment LEDs) and a command for unit operation is present, TEST mode causes:

1) A “t” to display momentarily on the dual 7-segment display

SYSTEM™ CONTROL WIRING

COMFORT CONTROL

Lower case “t”

2) The compressor will start and the outdoor fan will operate

3) The display will change to a steady “c” or “C” to show the current command for

unit operation.

Note: If a command for unit operation is present at the end of TEST mode will cause the unit to continue to operate.

• If no command for unit operation is present, TEST mode causes

1) A steady “t” appears on the dual 7-segment LEDs

2) The compressor will start

3) The compressor will turn off after 5-seconds.

Note: Entering TEST mode without a command for unit operation will cause the compressor to run 5-seconds.

FFaauull tt RReeccaallll MMooddee ((TTEESSTT aanndd SSWW22 BBuuttttoonnss))

• Enter

• When entering and exiting FAULT RECALL mode the top and bottom segments

• When entering

• Each fault is displayed one time with the top right hand segment of the dual 7-

• Each fault is displayed with the most recent fault displayed first.

FFAAUULLTT RREECCAALLLL

same time with insulated probes for one (1) second and release.

of the dual 7-segment LEDs will illuminate.

Fault Recall Mode – the top and bottom segments on the right side are illuminated

FFAAUULLTT RREECCAALLLL

stored faults on the dual 7-segment LEDs.

segment display activated between faults.

mode by pressing the

mode, the ICC will automatically scroll through

TTEESSTT

and

SSWW22

buttons at the

Page 25

• A maximum of six individual faults can be stored

ower case “t”

Fault Recall Mode – the top and bottom segments illuminated

• A maximum of three consecutive identical faults are stored.

• A “0” will be displayed with no faults are stored

• The ICC will automatically exit the faults

CClleeaarr FFaauulltt HHiiss ttoorryy ((TTEESSTT aanndd SSWW22 BB uuttttoonnss ))

• Clear FAULT HISTORY by pressing both TEST and SW2 button for five (5) seconds with insulated probes and release.

• The top and bottom segments of the dual 7-segment LEDs flash to indicate the

istory has been cleared.

FFAAUULLTT RREECCAALLLL

mode after displaying stored

Fault history is cleared with the top and bottom LED segments flash

NOTE: The memory card for the system has specific shared data for this system. The memory card is attached to the control box with a tether. The tether has an identification tag that can be used to identify the memory card. For the system data faults d1 through d8 reference the label on the memory card tether.

COMFORT CONTROL

SYSTEM™ CONTROL WIRING

Page 26

12.7

7-Segment

LEDs Display

Code Diagnostic Description

Status/Possible Cause – Troubleshooting

Information 0 – Standby No command for unit operation

Normal operation

c - First Stage Cooling Unit has received a command for first stage cooling

Normal operation

7-Segment

LEDs Display

Code Diagnostic Description

Status/Possible Cause – Troubleshooting

Information 0 – Standby No command for unit operation

Normal operation

c - First Stage Cooling Unit has received a command for first stage cooling

Normal operation

FLASHING

c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait until unit timer has expired or press the TEST button to reset timer.

7-Segment

Code Diagnostic Description

Status/Possible Cause – Troubleshooting

Information 0 – Standby No command for unit operation

Normal operation

c - First Stage Cooling Unit has received a command for first stage cooling

Normal operation

FLASHING

c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait until unit timer has expired or press the TEST button to reset timer.

C - Second Stage Cooling Unit has received a command for second stage cooling

Normal operation

FLASHING

C - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for second stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait unit timer has expired or press the TEST button to reset timer.

7-Segment EDs Display

Code Diagnostic Description

tatus/Possible Cause – Troubleshooting

Information 0 – Standby N

o command for unit operation

Normal operation

- First Stage Cooling Unit has received a command for first stage c

ooling

ormal operation

c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for first stage cooling during an active anti-short cycle timer o

r minimum run timer.

• Wait until unit timer has expired or press the T

EST button to reset timer. C - Second Stage Cooling Unit has received a command for second stage cooling

ormal operation

C - Anti-short cycle timer (3 minutes) or M

inimum run timer (30 seconds) active

•

The unit has received a command for second

stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait unit timer has expired or press the TEST button to reset timer.

h1 - First Stage Heat Pump Unit has received a command for first stage heat pump

Normal operation

h1 - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for first stage heat pump during an active anti-short cycle timer or minimum run timer.

• Wait unit timer has expired or press the TEST button to reset timer.

h2 - Second Stage Heat Pump Unit has received a command for second stage heat pump

Normal operation

h2 - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for second stage heat pump during an active anti-short cycle timer or minimum run timer.

• Wait unit timer has expired or press the TEST button to reset timer.

d - Defrost Active The unit is undergoing a defrost cycle

Normal operation

t - Test Mode The ICC is in TEST mode

7-Segment

Code Diagnostic Description

Status/Possible Cause – Troubleshooting

Information 0 – Standby No command for unit operation

Normal operation

c - First Stage Cooling Unit has received a command for first stage cooling

Normal operation

FLASHING

c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

• The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait until unit timer has expired or press the TEST button to reset timer.

C - Second Stage Cooling Unit has received a command for second stage cooling

Normal operation

7-Segment

LEDs Display

Code Diagnostic Description

Status/Possible Cause – Troubleshooting

Information 0 – Standby No command for unit operation

Normal operation

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the

• Motor protector open

• Line voltage disconnected

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the compressor

• Motor protector open

• Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

• Dirty indoor air filter

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the compressor

• Motor protector open

• Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

• Dirty indoor air filter

• Dirty outdoor coil

02 – High Pressure Control Open The ICC detects the HPC is open.

Reference ICC codes:

• 21

• L21

• 29

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the compressor

• Motor protector open

• Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

• Dirty indoor air filter

• Dirty outdoor coil

02 – High Pressure Control Open The ICC detects the HPC is open.

Reference ICC codes:

• 21

• L21

• 29

• L29

03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

• Check thermostat wire connections (R, C, 1, &

• Check thermostat location in zone (too close to

COMFORT CONTROL2SYSTEM™ CONTROL WIRING

CONVENTIONAL THERMOSTAT WIRING

ICC DIAGNOSTIC CODES

ICC Diagnostic Codes

Descriptions of the ICC diagnostic codes are provided below:

Dual 7-Segment

LEDs Display

Code

0 7

0 – Standby No command for unit operation

c - First Stage Cooling Unit has received a command for first stage cooling

c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

C - Second Stage Cooling Unit has received a command for second stage cooling

C - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

t - Test Mode The ICC is in TEST mode

P – Protector Trip A command for compressor operation is present but no current is measured to the compressor

01 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

02 – High Side Fault Compressor limit has opened four (4) times within a call for operation

03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

L4 – Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the run time before each trip is less than 15 seconds

Diagnostic Description

AND

Status/Possible Cause – Troubleshooting

Information

Normal operation

• The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait until unit timer has expired or press the TEST button to defeat short cycle delay.

Normal operation

• The unit has received a command for second stage cooling during an active anti-short cycle timer or minimum run timer.

• Wait unit timer has expired or press the TEST button to defeat short cycle delay.

• Motor protector open

• Line voltage disconnected

• Low refrigerant charge

• Air ducts have substantial leakage

• Dirty indoor air filter

• Dirty outdoor coil

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

• Check thermostat wire connections (R, C, 1, &

• Check thermostat location in zone (too close to discharge grill)

• Bad run capacitor

• Low line voltage

• Excessive refrigerant in compressor

• Seized bearings in compressor

Page 27

Dual 7-Segment

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch T

he indoor air mover (air handler/furnace)

annot supply the required airflow for

proper system operation

•

Misapplied/wrong indoor air mover – replace

ith properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the c

ompressor

• Motor protector open

• Line voltage disconnected

1 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

•

Dirty indoor air filter

• Dirty outdoor coil

2 – High Pressure Control Open The ICC detects the HPC is open.

eference ICC codes:

• 21

• L21

• 29

• L29

03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

•

Check thermostat wire connections (R, C, 1, &

•

Check thermostat location in zone (too close to

discharge grill)

4 – Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds

• Bad run capacitor

•

Low line voltage

• Excessive refrigerant in compressor

• Seized bearings in compressor

5 – Open Circuit (Compressor will not

Run)

•

The ICC has received a command for

unit operation but no current is present in the start and run circuits.

• The ICC will attempt to restart the unit

every five (5) minutes for four (4) attempts. After that, the ICC will attempt a restart every twenty (20) minutes for up

•

Check for damaged, miswired, or wrong run

capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for open compressor internal protector

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch T

he indoor air mover (air handler/furnace) cannot supply the required airflow for p

roper system operation

• Misapplied/wrong indoor air mover – replace w

ith properly sized air handler/furnace.

– Protector Trip A command for compressor operation is present but no current is measured to the compressor

•

Motor protector open

•

Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for m

ore than 18 hours in the cooling mode.

•

Low refrigerant charge

•

Air ducts have substantial leakage

• Dirty indoor air filter

•

Dirty outdoor coil 02 – High Pressure Control Open The ICC detects the HPC is open.

Reference ICC codes:

•

• L21

• 29

• L29

03 – Short Cycling The ICC detects the run time for the past f

our (4) compressor cycles is less than three

(3) minutes each.

• Check thermostat wire connections (R, C, 1, & 2

)

• Check thermostat location in zone (too close to d

ischarge grill) L4 – Locked Rotor The ICC detects four (4) consecutive p

rotector trips have occurred and the

verage run time for each trip is less than 15

seconds

• Bad run capacitor

• Low line voltage

•

Excessive refrigerant in compressor

• Seized bearings in compressor

05 – Open Circuit (Compressor will not Run)

• The ICC has received a command for

unit operation but no current is present in the start and run circuits.

• The ICC will attempt to restart the unit

every five (5) minutes for four (4) attempts. After that, the ICC will attempt a restart every twenty (20) minutes for up to four (4) hours.

•

Check for damaged, miswired, or wrong run

capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for open compressor internal protector

06 – Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

•

Misapplied/wrong indoor air mover – replace

with properly sized air handler/furnace.

P – Protector Trip A

command for compressor operation is present but no current is measured to the c

ompressor

• Motor protector open

• Line voltage disconnected

01 – Long Run Time (Compressor) T

he compressor has continuously run for

more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

•

Dirty indoor air filter

• Dirty outdoor coil

2 – High Pressure Control Open

The ICC detects the HPC is open.

eference ICC codes:

• 21

• L21

•

• L29 03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

• Check thermostat wire connections (R, C, 1, &

• Check thermostat location in zone (too close to

discharge grill) L4 – Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds

• Bad run capacitor

• Low line voltage

• Excessive refrigerant in compressor

• Seized bearings in compressor

05 – Open Circuit (Compressor will not Run)

• The ICC has received a command for

unit operation but no current is present in the start and run circuits.

• The ICC will attempt to restart the unit

every five (5) minutes for four (4) attempts. After that, the ICC will attempt a restart every twenty (20) minutes for up to four (4) hours.

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for open compressor internal protector

06 – Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

07 – Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch T

he indoor air mover (air handler/furnace) cannot supply the required airflow for p

roper system operation

• Misapplied/wrong indoor air mover – replace w

ith properly sized air handler/furnace.

– Protector Trip A command for compressor operation is present but no current is measured to the compressor

•

Motor protector open

•

Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for m

ore than 18 hours in the cooling mode.

•

Low refrigerant charge

•

Air ducts have substantial leakage

• Dirty indoor air filter

•

Dirty outdoor coil 02 – High Pressure Control Open The ICC detects the HPC is open.

Reference ICC codes:

•

• L21

• 29

• L29

03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

• Check thermostat wire connections (R, C, 1, &

• Check thermostat location in zone (too close to discharge grill)

L4 – Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds

• Bad run capacitor

• Low line voltage

• Excessive refrigerant in compressor

• Seized bearings in compressor

05 – Open Circuit (Compressor will not Run)

• The ICC has received a command for unit operation but no current is present in the start and run circuits.

• The ICC will attempt to restart the unit every five (5) minutes for four (4) attempts. After that, the ICC will attempt a restart every twenty (20) minutes for up to four (4) hours.

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for open compressor internal protector

06 – Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

07 – Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

09 – Low Secondary Volts The secondary voltage at R and C is below 18VAC

• Control transformer overloaded

• Low line voltage

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

LEDs Display

Code

05 – Open circuit (Compressor will not Run)

• The ICC has received a command for unit operation but no current is present in the start and run circuits

0 6

0 7

• The ICC will attempt to restart the unit every five (5) minutes for four (4) attempts. After that, the ICC will attempt a restart every twenty (20) minutes for up to four (4) hours.

• The ICC has had a protector trip for longer than 4 hours.

06 – Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor

06 – Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor five times, 4 retries in one compressor call

07 – Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor

07 – Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor four (4) times in one compressor call (4 retries)

09 – Low Secondary Volts The secondary voltage at R and C is below 18VAC

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

L21 – Active Protection Low Pressure Control Trip

LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. ICC alternately flashes L and 21

27 – Low Line Voltage or No Line Voltage Fault

Diagnostic Description

Status/Possible Cause – Troubleshooting

Information

• Check for damaged, miswired, or wrong run capacitor Check for broken wires, loose connectors, or

• miswired compressor

• Check compressor windings for continuity

• Check for open compressor internal protector

• No retries, contactor remains closed (infinite retries)

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Check for damaged, miswired, or wrong run capacitor

• Check for broken wires, loose connectors, or miswired compressor

• Check compressor windings for continuity

• Control transformer overloaded

• Low line voltage

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Expansion valve is not operating correctly

(see 21 above)

LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. ICC alternately flashes L and 21

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

Page 28

Dual 7-Segment

1 – Low Pressure Control Open The ICC detects the LPC is open. N

ote: The low pressure control is ignored

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

he ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

7 – Low Line Voltage or No Line Voltage

Fault

• Check incoming line voltage to the disconnect

and unit

• Check wiring connections

28 – High Line Voltage Fault

•

Check line voltage

9 – High Pressure Control Open

The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

1 – Low Pressure Control Open The ICC detects the LPC is open. N

ote: The low pressure control is ignored

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

he ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

7 – Low Line Voltage or No Line Voltage

Fault

• Check incoming line voltage to the disconnect

and unit

• Check wiring connections

28 – High Line Voltage Fault

•

Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor o

peration

•

Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

•

Dirty indoor coil or filter (cooling mode)

•

Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

•

Expansion valve is not operating correctly

21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect a

nd unit

•

Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

1 – Low Pressure Control Open

he ICC detects the LPC is open. Note: The low pressure control is ignored f

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

•

Outdoor coil is frozen (heating mode)

•

Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

LASHING

L21 – Active Protection

Low Pressure

Control Trip

he ICC has locked out the compressor due to three (3) consecutive LPC trips on the same c

ommand for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect

and unit

• Check wiring connections

28 – High Line Voltage Fault

•

Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

83 – Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature

• Replace the sensor

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor o

peration

•

Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

•

Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

•

Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage F

ault

•

Check incoming line voltage to the disconnect

and unit

•

Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

83 – Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature

• Replace the sensor

84 – Outdoor Ambient Temperature Fault The sensor detects an abnormally low or high outdoor ambient temperature

• Check unit placement – If the outdoor unit is in

a high temperature area, wait until the ambient temperature drops and check sensor reading.

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor o

peration

•

Unit has low refrigerant charge

•

Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

ontrol Trip

The ICC has locked out the compressor due to t

hree (3) consecutive LPC trips on the same

command for unit operation

27 – Low Line Voltage or No Line Voltage F

ault

•

Check incoming line voltage to the disconnect

and unit

• Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

83 – Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature

• Replace the sensor

84 – Outdoor Ambient Temperature Fault The sensor detects an abnormally low or high outdoor ambient temperature

• Check unit placement – If the outdoor unit is in a high temperature area, wait until the ambient temperature drops and check sensor reading.

• Replace the sensor.

90 – Communication Fault The ICC detects and internal fault condition

• Replace the ICC.

1 – Low Pressure Control Open The ICC detects the LPC is open. N

ote: The low pressure control is ignored

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

FLASHING

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

1 – Low Pressure Control Open

he ICC detects the LPC is open. Note: The low pressure control is ignored f

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

•

Outdoor coil is frozen (heating mode)

•

Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

LASHING

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same c

ommand for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

28 – High Line Voltage Fault

•

Check line voltage

29 – High Pressure Control Open The ICC detects the HPC is open

• Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

FLASHING

L29 – Active Protection High Pressure Control Trip

The ICC has locked out the compressor due to three (3) consecutive HPC trips on the same command for unit operation

30 – Fuse Open The ICC detects the on-board fuse is open

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or

miswired.

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

P – Protector Trip A command for compressor operation is present but no current is measured to the compressor

• Motor protector open

• Line voltage disconnected

01 – Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode.

• Low refrigerant charge

• Air ducts have substantial leakage

• Dirty indoor air filter

• Dirty outdoor coil

02 – High Pressure Control Open The ICC detects the HPC is open.

Reference ICC codes:

• 21

• L21

• 29

• L29

03 – Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each.

• Check thermostat wire connections (R, C, 1, &

• Check thermostat location in zone (too close to discharge grill)

L4 – Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15

• Bad run capacitor

• Low line voltage

• Excessive refrigerant in compressor

• Seized bearings in compressor

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

21 – Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation

• Unit has low refrigerant charge

• Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

L21 – Active Protection

Low Pressure

Control Trip

The ICC has locked out the compressor due to three (3) consecutive LPC trips on the same command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

d1 – No Shared Data

ELECTRONICS GROUP TO

DESCRIBE

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for

• Misapplied/wrong indoor air mover – replace with properly sized air handler/furnace.

1 – Low Pressure Control Open The ICC detects the LPC is open. N

ote: The low pressure control is ignored

or the first 90 seconds of compressor

operation

• Unit has low refrigerant charge

•

Indoor coil is frozen (cooling mode)

• Dirty indoor coil or filter (cooling mode)

• Indoor blower is not running (cooling mode)

• Outdoor coil is frozen (heating mode)

• Outdoor fan is not running (heating mode)

• Expansion valve is not operating correctly

LASHING

L21 – Active Protection

Low Pressure

ontrol Trip

The ICC has locked out the compressor due to t

hree (3) consecutive LPC trips on the same

command for unit operation

27 – Low Line Voltage or No Line Voltage Fault

• Check incoming line voltage to the disconnect and unit

• Check wiring connections

28 – High Line Voltage Fault

• Check line voltage

LEDs Display

Code

Diagnostic Description

28 – High Line Voltage Fault • Check line voltage

Status/Possible Cause – Troubleshooting

Information

9 – High Pressure Control Open

2 The ICC detects the HPC is open

L29 – Active Protection High Pressure Control Trip

LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. ICC alternately flashes L and 29

30 – Fuse Open The ICC detects the on-board fuse is open

80 – Low Air Flow The ICC detects that the indoor unit is not providing the minimum airflow requirements.

83 – Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature

84 – Outdoor Ambient Temperature Fault The sensor detects an abnormally low or high outdoor ambient temperature

93 – Internal Control Fault The control is not functioning properly.

d1 – No Shared Data • Replace memory card with correct system

d3 – Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation

d4 – (Device) Memory Card Invalid for Device The data in the memory card inserted into the control board does not match the data in the control.

d8 – Old Shared Data System data is obsolete

Outdoor coil is dirty (cooling mode)

• Outdoor fan is not running (cooling mode)

• Dirty indoor coil or filter (heating mode)

•

• Indoor blower is not running (heating mode)

• Liquid line restriction

• Excessive refrigerant charge

(see 29 above)

LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. ICC alternately flashes L and 29

• The 3-amp fuse on the ICC is open.

• Low voltage wiring at R and C is damaged or miswired.

• Misapplied/wrong indoor air mover – replace with properly sized unit.

• Replace the sensor

• Check sensor is installed correctly on control

• Check unit placement – If the outdoor unit is in a high temperature area, wait until the ambient temperature drops and check sensor reading.

• Replace the sensor.

• Check sensor is installed correctly on control

• Check control for proper system operation.

• Replace control

information.

• Misapplied/wrong indoor air mover –

replace with properly sized air handler/furnace.

• Check memory card to ensure it matches

device

• Check if memory card is present

• If system will not operate, order new memory card to update system information.

Page 29

12.8 Conventional 24VAC Thermostat Control Wiring

The (-)ASL series of heat pumps allow the installer to use conventional 24VAC control wiring and a conventional thermostat for proper unit operation.

IIMMPPOORRTTAANNTT:: communications. Serial communications allow access to the fault history of the system. This diagnostic information is not available when the (-)ASL unit is using a conventional thermostat. Reference section 12.2 Comfort Control

Thermostat control wiring requires a minimum of four (4) wires for proper unit oper-

tion:

Optional wiring:

A thermostat and a 24-volt, 40VA minimum transformer are required for the control circuit of the condensing unit. The furnace or the air handler transformer may be used if sufficient. See the wiring diagram for reference. Use Table 6 to size the 24volt control wirings.

The preferred method of unit installation and operation is by serial

Control Wiring.

R – 24VAC

C – 24VAC common

Y1 – First stage operation

Y2 – Second stage operation

L – ICC fault information

CONVENTIONAL THERMOSTAT WIRING

L Terminal Output

• Flash 1 – Compressor running extremely long run cycle or low pressure

• Flash 2 – High pressure control trip

• Flash 3 – Unit short cycling

• Flash 4 – Locked rotor

• Flash 5 – Compressor will not run, open circuit

• Flash 6 – Open start circuit

• Flash 7 – Open run circuit

• Flash 8 – Control mis-operation

• Flash 9 – Low control voltage

TABLE 6

FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS

SOLID COPPER WIRE - AWG.

3.0 16 14 12 10 10 10

2.5 16 14 12 12 10 10

2.0 18 16 14 12 12 10

50 100 150 200 250 300

Thermostat Load - Amps

(1) Wire length equals twice the run distance.

NOTE: Do not use control wiring smaller than No. 18 AWG between thermostat and outdoor unit.

Length of Run - Feet (1)

Page 30

(-)HPN Air

Handler

ypical Two-Stage Thermostat

(-)ASL

ondensing

nit

ield Installed

Line Voltage

WIRING INFORMATION

actory Standard

ODD

Y/BL

FIGURE 8

(-)HPN Air

Handler

Typical Two-Stage Thermostat

(-)ASL

Condensing

Unit

ield Installed

ine Voltage

WIRING INFORMATION

actory Standard

ODD

/BL

Humidistat

(-)HPN Air

Handler

Typical Two-Stage Thermostat

(-)ASL

Condensing

Unit

Field Installed

Line Voltage

WIRING INFORMATION

Factory Standard

ODD

/BL

W/R

DHM

(-)HPN Air

Handler

Typical Two-Stage Thermostat

(-)ASL

Condensing

Unit

Field Installed

Line Voltage

WIRING INFORMATION

Factory Standard

ODD

Y/BL

W/R

DHM

TYPICAL 2-STAGE THERMOSTAT: CONDENSING UNIT WITH ELECTRIC HEAT

FIGURE 10

TYPICAL TWO-STAGE THERMOSTAT: CONDENSING UNIT WITH ELECTRIC HEAT USING A TWO-STAGE THERMOSTAT WITH DEHUMIDIFICATION*

FIGURE 9

TYPICAL TWO-STAGE THERMOSTAT: CONDENSING UNIT WITH ELECTRIC HEAT USING A HUMIDISTAT FOR DEHUMIDIFICATION*.

CONVENTIONAL THERMOSTAT WIRING

Page 31

FIGURE 14

IRING DIAGRAM FOR (-)ASL-039JEC, 048JEC, & 060JEC (DUAL DRIVE)

Page 32

Page 33

CM 0610

Rheem ASL-JEC 18 Seer, RASL-024JEC, RASL-036JEC, RASL-039JEC, RASL-048JEC Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual