Bryant Base Series User Manual

Application Guideline and Service Manual
UNIT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION GUIDELINE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Residential New Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Add-On Replacement (Retrofit) - R22 to Puron . . . . . . . . . . . . . . 4
Seacoast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ACCESSORY DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LOW-AMBIENT COOLING GUIDELINE . . . . . . . . . . . . . . . . . . . 7
LONG LINE GUIDELINE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CABINET ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Basic Cabinet Designs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Access Compressor Or Other Internal Cabinet Components. . . . . 9
Labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Aluminum Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cycle Protector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Time-Delay Relay (TDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pressure Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Defrost Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Defrost Control Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
HK32EA001/007 DEFROST CONTROL. . . . . . . . . . . . . . . . . . 15
HK32EA009 DEFROST CONTROL . . . . . . . . . . . . . . . . . . . . . 17
HK32EA003 / 008 DEFROST CONTROL. . . . . . . . . . . . . . . . . 17
System function and Sequence of operation (HK32EA003/008) 17
Troubleshooting (HK32EA003/008) . . . . . . . . . . . . . . . . . . . . . 18
HK32EA008 DEFROST CONTROL . . . . . . . . . . . . . . . . . . . . . 18
Quiet Shift-2 (non-communicating). . . . . . . . . . . . . . . . . . . . . . . 18
HK32EA010 DEFROST CONTROL . . . . . . . . . . . . . . . . . . . . . 18
HK32EA011 DEFROST CONTROL . . . . . . . . . . . . . . . . . . . . . 18
Outdoor Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ECM Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PSC Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Compressor Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Low-Voltage Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
COPELAND SCROLL COMPRESSOR. . . . . . . . . . . . . . . . . . . 20
LG SCROLL COMPRESSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Characteristics of the LG Scroll Compressor: . . . . . . . . . . . . . . . 21
COMPRESSOR TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 22
Compressor Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mechanical Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Noisy Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electrical Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REFRIGERATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Servicing Systems on Roofs With Synthetic Materials . . . . . . . . 25
Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Aluminum Brazing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Service Valves and Pumpdown . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Suction Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Accumulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Thermostatic Expansion Valve (TXV) . . . . . . . . . . . . . . . . . . . . 31
Make Piping Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
REFRIGERATION SYSTEM REPAIR. . . . . . . . . . . . . . . . . . . . . . 33
Leak Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Aluminum Coil Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Compressor Removal and Replacement . . . . . . . . . . . . . . . . . . . 35
System Clean-Up After Burnout . . . . . . . . . . . . . . . . . . . . . . . . . 35
Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Check Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TROUBLESHOOTING with SUPERHEAT . . . . . . . . . . . . . . . . . . 37
Single-Stage Communicating Heat Pump System Functions and Se-
quence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
DEFROST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
QUIET SHIFT–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
LIQUID LINE SOLENOID ACCESSORY . . . . . . . . . . . . . . . . 49
MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Systems Communication Failure . . . . . . . . . . . . . . . . . . . . . . . . . 49
Pressure Switch Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Control Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
24V Brown Out Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Compressor Voltage Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Compressor Thermal Cutout
or Loss of 230V Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Contactor Shorted Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
No 230V at Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Temperature Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Thermistor Sensor Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Failed Thermistor Default Operation. . . . . . . . . . . . . . . . . . . . . . 50
TWO-STAGE 286B/289B 180B/187B . . . . . . . . . . . . . . . . . . . . . . 52
Application Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Model Plug. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Airflow Selections for 187B / 286B / 180B /289B Using Non-Commu-
nicating (Non-Evolution) Thermostats . . . . . . . . . . . . . . . . . . . . 53
Airflow Selection for FV4 Fan Coils for 180B, 187B, 286B, 289B Us-
ing Non-Communicating (Non-Evolution) Thermostats. . . . . . . 53
GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Low Ambient Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Quiet Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Quiet Shift-2 (communicating models)
(part # HK38EA016, HK38EA022, HK38EA023) . . . . . . . . . . . 54
Liquid-Line Solenoid Accessory . . . . . . . . . . . . . . . . . . . . . . . . . 54
Check Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Heating Check Chart Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 54
System Functions and Sequence of Operation (286B/89B/180B/187B)
55
Cooling and Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Residential Air Conditioners and Heat Pumps
Using R-22 and Puron® Refrigerant

Bryant Base Series Specifications

General

Brand	Bryant
Model	Base Series
Category	Air Conditioner
Language	English

Summary

Unit Identification

Air Conditioner and Heat Pump Model Number Nomenclature

Explains how to interpret model numbers for AC and heat pumps.

Serial Number Nomenclature

Details the format and meaning of serial numbers for unit identification.

Safety Considerations

Unit Operation and Safety Hazard

Highlights critical hazards related to unit operation and safety.

Introduction

Provides an overview of the document's purpose and scope.

Installation Guideline

General guidelines for installing units, including new construction and retrofits.

Residential New Construction

Specific installation requirements for new residential construction.

Add-On Replacement (Retrofit) - R22 to Puron

Guidelines for converting R22 systems to Puron refrigerant.

Seacoast

Special considerations for units installed in coastal environments.

Accessories

Table 1 - Required Field-Installed Accessories for Air Conditioners

Lists accessories required for specific AC applications.

Table 2 - Required Field-Installed Accessories for Heat Pumps

Lists accessories required for specific heat pump applications.

Accessory Descriptions

Crankcase Heater

Explains the function of the crankcase heater for compressor protection.

Evaporator Freeze Thermostat

Describes the evaporator freeze thermostat for preventing coil freezing.

Isolation Relay

Details the isolation relay's role in heat pump low-ambient operation.

Low-Ambient Pressure Switch

Explains the low-ambient pressure switch for controlling fan speed.

Outdoor Air Temperature Sensor

Describes the outdoor air temperature sensor for thermostat integration.

Thermostatic Expansion Valve (TXV)

Explains the TXV's function in metering refrigerant flow.

Low-Ambient Cooling Guideline

Fig. 1 - Base / Mid-Tier / Deluxe (4-sided) Baffle Assembly

Illustrates baffle assembly for low-ambient cooling.

Long Line Guideline

Cabinet Assembly

Basic Cabinet Designs

Describes the different cabinet designs for units.

Fig. 2 - Cabinet Designs

Visual representation of the different unit cabinet designs.

Access Compressor Or Other Internal Cabinet Components

Remove Top Cover - Mid-Tier / Deluxe

Steps for removing the top cover on specific unit tiers.

Remove Fan Motor Assembly - Mid-Tier / Deluxe

Instructions for removing the fan motor assembly.

Control Box Cover-Base Products

Information about the control box cover on base products.

Remove Top Cover-Base Products

Steps for removing the top cover on base product units.

Remove Fan Motor Assembly-Base Products

Instructions for removing the fan motor assembly on base products.

Fig. 3 - Legacy Series Control Box Identification

Labeling

Fig. 4 - Label Locations

Shows the locations of various labels on the unit.

Electrical

Electrical Shock Hazard

Critical warning about electrical shock hazards.

Aluminum Wire

Guidelines for using aluminum wire in electrical connections.

Contactor

Explains the function and troubleshooting of the contactor.

Capacitor

Details the function and testing of capacitors.

Cycle Protector

Crankcase Heater

Time-Delay Relay (TDR)

Pressure Switches

Low-Pressure Switch (AC Only)

Explains the low-pressure switch function in AC systems.

High-Pressure Switch (AC & HP)

Details the high-pressure switch function in AC and HP systems.

Loss of Charge Switch (HP Only)

Describes the loss of charge switch specific to heat pumps.

Defrost Thermostat

Defrost Control Boards

HK32EA001/007 Defrost Control

Specific defrost control board for Legacy Series heat pumps.

Cooling Sequence of Operation (HK32EA001/007)

Operational sequence for cooling mode with this control.

Heating Sequence of Operation (KH32EA001)

Operational sequence for heating mode with this control.

Defrost Sequence (HK32EA001/007)

Explains the defrost cycle initiation and termination.

Defrost Speedup

Troubleshooting (HK32EA001/007)

HK32EA009 Defrost Control

HK32EA003 / 008 Defrost Control

Quiet Shift (HK32EA003/008)

Describes the Quiet Shift feature for noise reduction.

Five-Minute Compressor Delay (HK32EA003/008)

Explains the compressor delay feature.

System function and Sequence of operation (HK32EA003/008)

Operational sequence for this control board.

Defrost Sequence

Details the defrost cycle sequence.

Deluxe Defrost Speedup

Procedure for initiating a forced defrost.

Troubleshooting (HK32EA003/008)

HK32EA008 Defrost Control

Quiet Shift-2 (non-communicating)

Explains the Quiet Shift-2 feature for noise reduction.

HK32EA010 Defrost Control

HK32EA011 Defrost Control

Outdoor Fan Motors

ECM Fan Motor

Details ECM fan motor operation and troubleshooting.

PSC Fan Motor

Explains PSC fan motor operation and maintenance.

Electrical Shock Hazard

Critical warning about electrical shock hazards.

Compressor Plug

Information on the compressor electrical plug.

Low-Voltage Terminals

Description of low-voltage terminal designations.

Copeland Scroll Compressor

Scroll Gas Flow

Illustration of gas flow within a scroll compressor.

Fig. 15 - Scroll Compressor Refrigerant Flow

Diagram showing refrigerant flow in a scroll compressor.

Caution

Important safety cautions regarding compressor handling.

LG Scroll Compressor

Characteristics of the LG Scroll Compressor

Key characteristics of LG scroll compressors.

Internal Motor Overload Protection (OLP)

Explains the internal motor overload protection system.

Vacuum protection device

Details the vacuum protection feature in LG scroll compressors.

Internal Pressure Relief (IPR)

Describes the internal pressure relief mechanism.

Quiet Shut Down Device

Explains the device for minimizing shut-down noise.

Discharge Temperature Protection

Covers compressor discharge temperature protection.

Compressor Troubleshooting

Compressor Failures

Categorizes compressor failures into mechanical and electrical.

Mechanical Failures

Discusses failures related to the compressor's mechanical components.

Electrical Shock Hazard

Critical warning about electrical shock hazards.

Locked Rotor

Describes the locked rotor failure mode.

Runs, Does Not Pump

Explains failures where the compressor runs but doesn't pump.

Noisy Compressor

Fig. 16 - Split Post Grommet part number: KA75UG100

Part number for split post grommets.

Fig. 17 - Suction Line Loop

Illustration of a suction line loop for noise reduction.

Electrical Failures

Single-Phase Motors

Identifies terminals and tests for single-phase motors.

Fig. 18 - Identifying Compressor Terminals

Diagram for identifying compressor motor terminals.

Open Circuit

Troubleshooting steps for open circuits in motor windings.

Unit Personal Injury Hazard

Critical warning about personal injury.

Unit Damage Hazard

Warning about potential equipment damage.

Ground Circuit

Short Circuit

Refrigeration System

Refrigerant

Information on Puron refrigerant and safety.

Unit Operation and Safety Hazard

Hazards related to Puron refrigerant operation.

Unit Damage Hazard

Potential equipment damage from POE oil exposure.

Servicing Systems on Roofs With Synthetic Materials

Precautions for servicing units on synthetic roofing.

Synthetic Roof Precautionary Procedure

Steps to protect roofing material during service.

Brazing

Aluminum Brazing

Specific procedures for brazing aluminum coils.

Service Valves and Pumpdown

Personal Injury and Unit Damage Hazard

Warnings about service valve repair and pressure.

Fig. 19 - Suction Service Valve (Front Seating)

Diagram of a suction service valve.

Heating Piston (AccuRater®) - Heat Pumps Only

Fig. 20 - Front Seating Service Valve with Chatleff Connection Used in Legacy, and 4-Sided Preferred and Evolution Puron Heat Pumps.

Diagram of a front seating service valve.

Fig. 21 - AccuRaterr Components (used in R-22 Heat Pumps)

Diagram of AccuRater components.

Reversing Valve

If valve is defective:

Steps to take if the reversing valve is found to be defective.

Fig. 22 - Reversing Valve (Cooling Mode or Defrost Mode, Solenoid Energized)

Diagram of the reversing valve in cooling/defrost mode.

Fig. 23 - Reversing Valve (Heating Mode, Solenoid De-Energized)

Diagram of the reversing valve in heating mode.

Liquid Line Filter Drier

Install Liquid-line Filter Drier Indoor - AC

Instructions for installing a liquid line filter drier in AC units.

Caution

Warnings about filter drier installation and damage.

Install Liquid-line Filter Drier Indoor - HP

Instructions for installing a liquid line filter drier in HP units.

Suction Line Filter Drier

Information on suction line filter driers for specific applications.

Fig. 24 - Liquid Line Filter Drier - AC

Illustration of AC liquid line filter drier installation.

Fig. 25 - Liquid Line Filter Drier - HP

Illustration of HP liquid line filter drier installation.

Accumulator

To change accumulator:

Steps for replacing the accumulator.

Caution

Safety caution regarding personal injury.

Fig. 26 - Accumulator

Diagram showing accumulator components.

Thermostatic Expansion Valve (TXV)

TXV Operation

Explains how the TXV operates to regulate refrigerant flow.

Install TXV

Guidelines for installing the TXV.

Caution

Warnings about TXV installation and equipment damage.

Equipment Damage Hazard

Hazard warning for equipment damage during TXV installation.

Installing TXV in Place of Piston in a Rated Indoor Coil (pre-2006)

Procedure for installing TXV in older indoor coils.

Fig. 27 - Position of Sensing Bulb

Diagram showing correct sensing bulb placement.

Replacing TXV on Indoor Coil (post-2006)

Make Piping Connections

Personal Injury and Environmental Hazard

Warnings regarding personal injury and environmental hazards.

Unit Damage Hazard

Warning about equipment damage from POE oil exposure.

Unit Damage Hazard

Warning about damage from buried refrigerant tubing.

Fig. 28 - Typical TXV Installation

Diagram showing typical TXV installation.

Refrigeration System Repair

Leak Detection

Methods for detecting refrigerant leaks in the system.

Fig. 29 - Electronic Leak Detection

Illustration of electronic leak detection.

Personal Injury and Unit Damage Hazard

Hazards associated with using nitrogen for leak detection.

Fig. 30 - Bubble Leak Detection

Illustration of bubble leak detection method.

Coil Removal

Procedures for removing the unit coil.

Fire Hazard

Warning about fire hazard during tubing cuts.

Aluminum Coil Removal

Caution

Warning about premature corrosion failure of aluminum coils.

Fig. 31 - Fin Isolator Location

Diagram showing fin isolator location.

Fig. 32 - Use Braze Shield to Protect Aluminum

Illustration of using a braze shield.

Fig. 33 - Fin Isolator Orientation

Diagram showing fin isolator orientation.

Fig. 34 - Copper Stub Tube Connection

Diagram of copper stub tube connection.

Compressor Removal and Replacement

Caution

Warnings about personal injury and handling refrigerant.

System Clean-Up After Burnout

Procedures for cleaning the system after compressor burnout.

Unit Damage Hazard

Warning about damage from open systems and moisture.

Evacuation

Methods for evacuating the system.

Deep Vacuum Method

Explanation of the deep vacuum method for evacuation.

Fig. 35 - Deep Vacuum Graph

Graph illustrating the deep vacuum process.

Triple Evacuation Method

Fig. 36 - Triple Evacuation Method

Diagram of the triple evacuation method.

Check Charge

Troubleshooting with Superheat

Basic Diagnostics

Initial steps for diagnosing system issues using superheat.

Low Superheat with Normal or Low Suction Pressure

Troubleshooting low superheat with specific pressure conditions.

High Suction Pressure

Troubleshooting high suction pressure issues.

High Superheat with Normal or Low Pressure

Diagnosing high superheat under specific pressure conditions.

Hunting Superheat

Pseudo Evaporator Superheat Instructions

The method requires the following information:

Information needed for pseudo evaporator superheat calculation.

Fig. 37 - Tube Fitting Geometry

Diagram of tube fitting geometry.

Table 5 - Fitting Losses in Equivalent Feet

Table showing equivalent feet for tube fittings.

Example 1

Table 6 - Puron System Suction Pressure Drop

Table 7 - R-22 System Suction Pressure Drop

Example 2

Fig. 38 - Pseudo Evaporator Superheat Pressure and Temperature Measurement Locations

Diagram for taking measurements for pseudo superheat.

Table 8 - Puron Refrigerant Pressure Temperature Chart

Table 9 - Puron Refrigerant Pressure Temperature Relationship

Table 10 - Puron Subcooling Chart

Table 11 - Puron Superheat Chart

Table 12 - R-22 Subcooling Chart

Table 13-R-22 Superheat Chart

Single-Stage Communicating Heat Pump System Functions and Sequence of Operation

Sequence of Operation

Describes how the system operates in cooling and heating modes.

Cooling & Heating Operation

Details the operational sequence for cooling and heating.

Communication and Status Function Lights

Explains the status indicator lights on the control board.

Fig. 39 - Control Board

Diagram of the control board layout.

Amber Status Light

Information on the amber status light for fault codes.

Crankcase Heater Operation

Explains the operation of the crankcase heater.

Utility Interface

With Evolution Control

How the utility interface works with Evolution control.

Fig. 40 - Utility Interface

Diagram of the utility interface wiring.

With Non-Communicating Thermostats

Utility interface wiring for non-communicating thermostats.

Low Ambient Cooling

Evolution Controlled low ambient cooling:

Low ambient cooling without a kit using Evolution control.

Standard Thermostat low ambient cooling mode:

Low ambient cooling with standard thermostats.

Defrost

Auto defrost

How auto defrost adjusts interval times.

Defrost Hold

How defrost hold functions in non-communicating systems.

Forced Defrost

Methods for manually initiating a defrost cycle.

Quiet Shift-2

Describes the Quiet Shift-2 feature for noise reduction.

Liquid Line Solenoid Accessory

Accessory Liquid Solenoid with Evolution Communicating Control:

Connection details for Evolution control.

On Models with Accessory Liquid Solenoid Using a Non-Communicating Thermostat:

Connection details for non-communicating thermostats.

Major Components

Control Board

Functions controlled by the heat pump control board.

Field Connections

Wiring connections for Evolution and standard thermostats.

Compressor Internal Relief

Explanation of compressor internal relief protection.

Troubleshooting

Systems Communication Failure

Diagnosing communication failures between units.

Model Plug

Importance of the correct model plug installation.

Pressure Switch Protection

How pressure switches protect the unit.

Control Fault

Identifying control board failures.

24V Brown Out Protection

Protection against low voltage conditions.

Compressor Voltage Sensing

How the control senses compressor voltage.

Compressor Thermal Cutout or Loss of 230V Power

Troubleshooting compressor thermal cutout issues.

Contactor Shorted Detection

No 230V at Compressor

Temperature Thermistors

Thermistor Sensor Comparison

How the control compares thermistor readings.

Failed Thermistor Default Operation

Default operations when a thermistor fails.

Thermistor Curve:

Resistance vs. temperature chart for thermistors.

Status Codes

How status codes are indicated by the amber LED.

Fig. 41 - Resistance vs. Temperature Chart

Chart showing thermistor resistance values.

Table 14 - Status Codes

Two-Stage 286B/289B 180B/187B

Application Guidelines

Guidelines for applying two-stage units.

Model Plug

Importance and function of the model plug.

Table 15 - Model Plug Information

Table detailing model plug numbers and resistances.

Airflow Selections for 187B / 286B / 180B/289B Using Non-Communicating (Non-Evolution) Thermostats

Airflow Selection for 58CVA/58MVB Furnaces

Airflow settings for specific furnace models.

Airflow Selection for FV4C Fan Coils (non-communicating)

Airflow settings for FV4C fan coils.

General Information

Low Ambient Cooling

Requirements for operating below 55°F.

Evolution Controlled low ambient cooling:

Low ambient cooling without a kit using Evolution control.

Defrost

Explanation of defrost modes and timing.

Defrost Hold

Forced Defrost

Quiet Shift

Quiet Shift-2 (communicating models) (part # HK38EA016, HK38EA022, HK38EA023)

Liquid-Line Solenoid Accessory

Accessory Liquid Solenoid with Evolution Communicating Control:

Connection details for Evolution control.

On Models with Accessory Liquid Solenoid Using a Non-Communicating Thermostat:

Connection details for non-communicating thermostats.

Check Charge

Heating Check Chart Procedure

System Function and Sequence Of Operation (127A/226A/CA17/CH17/BA17/BH17)

Cooling

Sequence of operation for cooling mode.

Heating

Sequence of operation for heating mode.

Compressor Operation

How the scroll compressor operates with unloading.

Quiet Shift

Noise reduction feature during defrost.

HK32EA008/010 Defrost Control

Defrost control for specific models.

Quiet Shift-2 (non-communicating)

Noise reduction feature for non-communicating systems.

Defrost

Explanation of defrost control timing and termination.

Defrost Speedup

Procedure for initiating a forced defrost.

Outdoor Fan Motor Operation

ECM Fan Motor Troubleshooting

Steps to troubleshoot ECM fan motor failures.

Time Delays

Unit time delays for various operations.

Table 16 - Outdoor Fan Motor PWM

PWM output values for outdoor fan motors.

Pressure Switches

Muffler, Accumulator, Reversing Valve (RVS)

Components related to compressor discharge.

Thermistors

Function and troubleshooting of thermistors.

Outdoor Ambient Thermistor

Role of the outdoor ambient thermistor.

Outdoor Coil Thermistor (OCT)

Role of the outdoor coil thermistor.

Thermistor Curve

Chart for thermistor resistance values.

Fig. 42 - Resistance Values Versus Temperature

Chart showing thermistor resistance values.

Control Box

Contactor And Capacitor

Discusses contactors and capacitors in the control box.

Incoming Power

Information on incoming power connections and safety.

Electrical Shock Hazard

Critical warning about electrical shock.

Fig. 43 - Start Relay and Capacitor Mounting Locations in Cube Cabinet

Diagram of component mounting.

Troubleshooting

Troubleshooting circuit board HK38EA016, 022, 023, 026

Specific troubleshooting for Evolution Series control boards.

Systems Communication Failure

Diagnosing communication failures.

Model Plug

Importance of correct model plug installation.

Pressure Switch Protection

How pressure switches protect the unit.

Control Fault

Identifying control board failures.

Brown-Out Protection

Protection against brown-out conditions.

Fig. 44-2-Stage Control Board

Diagram of a 2-stage control board.

230v Brown-Out Protection Defeated

230V Line (Power Disconnect) Detection

Compressor Voltage Sensing

Contactor Shorted Detection

Compressor Thermal Cutout 180B/187B/286B/289B

Low or High Contactor Open/No 230V at Compressor Contractor 180B/187B/286B/289B

Troubleshooting units for proper switching between low & high stages 180B/187B/286B/289B

Unloader Test Procedure 180B/187B/286B/289B

Temperature Thermistors

Thermistor Sensor Comparison

How the control compares thermistor readings.

Failed Thermistor Default Operation

Default operations when a thermistor fails.

Fig. 45 - Outdoor Air Thermistor (OAT) Attachment

Diagram of OAT thermistor attachment.

Fig. 46 - Outdoor Coil Thermistor (OCT) Attachment

Diagram of OCT thermistor attachment.

Table 17 - Two-Stage Compressor Resistances

Table 18 - TROUBLESHOOTING

Two Stage Non-Communicating 127A/CA17/BA17CH17/BH17/226A

Operating Ambient

Outdoor operating ambient limits.

Airflow Selections (ECM Furnaces)

Airflow settings for ECM furnaces.

Airflow Selection for Variable Speed Furnaces (non-communicating)

Airflow settings for variable speed furnaces.

Airflow Selection for FV4C Fan Coils (non-communicating)

Airflow settings for FV4C fan coils.

General Information

Low Ambient Cooling

Requirements for operating below 55°F.

Defrost

Explanation of defrost modes and timing.

System Function and Sequence Of Operation (127A/226A/CA17/CH17/BA17/BH17)

Cooling

Sequence of operation for cooling mode.

Heating

Sequence of operation for heating mode.

Compressor Operation

How the scroll compressor operates with unloading.

Quiet Shift

Noise reduction feature during defrost.

HK32EA008/010 Defrost Control

Defrost control for specific models.

Quiet Shift-2 (non-communicating)

Noise reduction feature for non-communicating systems.

Defrost

Explanation of defrost control timing and termination.

Defrost Speedup

Procedure for initiating a forced defrost.

Fig. 47 - Defrost Control

Check Charge

Heating Check Chart Procedure

Verify 226A / CH17 units for proper switching between low & high stages

Unloader Test Procedure

Care and Maintenance

Electrical Shock Hazard

Critical warning about electrical shock.

Unit Damage Hazard

Warning about equipment damage during maintenance.

Desert and Seacoast Locations

Special maintenance for harsh environments.

Cleaning Coil

Procedure for cleaning the unit's coil.

Unit Damage Hazard

Warning about coil fin damage.

Cleaning Outdoor Fan Motor and Blade

Procedure for cleaning the fan motor and blade.

Electrical Controls and Wiring

Refrigerant Circuit

Final Check-Out

Air Conditioner Troubleshooting Chart

Compressor Will Not Run

Troubleshooting steps for a non-running compressor.

No Cooling Or Insufficient Cooling

Troubleshooting steps for cooling performance issues.

Heat Pump Troubleshooting Heating Cycle

Compressor Will Not Run

Troubleshooting steps for a non-running compressor in heating.

No Heating Or Insufficient Heating

Troubleshooting steps for heating performance issues.

Heat Pump Troubleshooting Cooling Cycle

Compressor Will Not Run

Troubleshooting steps for a non-running compressor in cooling.

No Cooling Or Insufficient Cooling

Troubleshooting steps for cooling performance issues.