Bryant HK32EA007 - HEAT PUMP TROUBLESHOOTING COOLING CYCLE

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Residential Air Conditioners and Heat Pumps Using R-22 and Puron® Refrigerant: Application Guideline and Service Manual

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

A90207

Fig. 50 – Heat Pump Troubleshooting - Cooling Cycle

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Table of Contents1
Unit Identification3
Safety Considerations4
Introduction4
Installation Guideline4
Residential New Construction4
Add-On Replacement (Retrofit) - R22 to Puron4
Seacoast4
Accessories5
Required Field-Installed Accessories for Air Conditioners5
Required Field-Installed Accessories for Heat Pumps5
Accessory Descriptions6
Low-Ambient Cooling Guideline7
Long Line Guideline8
Cabinet Assembly8
Basic Cabinet Designs8
Access Compressor or Other Internal Cabinet Components9
Labeling11
Electrical12
Aluminum Wire12
Contactor12
Capacitor12
Cycle Protector13
Crankcase Heater13
Time-Delay Relay (TDR)14
Pressure Switches14
Defrost Thermostat15
Defrost Control Boards15
Hk32Ea001/007 Defrost Control15
Defrost Control Speed-Up Timing Sequence16
Hk32Ea009 Defrost Control17
Hk32Ea003 / 008 Defrost Control17
System Function and Sequence of Operation (HK32EA003/008)17
Troubleshooting (HK32EA003/008)18
Hk32Ea008 Defrost Control18
Quiet Shift-2 (Non-Communicating)18
Hk32Ea010 Defrost Control18
Hk32Ea011 Defrost Control18
Outdoor Fan Motors20
ECM Fan Motor20
PSC Fan Motor20
Compressor Plug20
Low-Voltage Terminals20
Copeland Scroll Compressor20
Lg Scroll Compressor21
Characteristics of the LG Scroll Compressor21
Compressor Troubleshooting22
Compressor Failures22
Mechanical Failures22
Noisy Compressor23
Electrical Failures24
Refrigeration System25
Refrigerant25
Servicing Systems on Roofs with Synthetic Materials25
Brazing26
Aluminum Brazing26
Service Valves and Pumpdown26
Liquid Line Filter Drier29
Suction Line Filter Drier29
Accumulator30
Thermostatic Expansion Valve (TXV)31
Make Piping Connections32
Refrigeration System Repair33
Leak Detection33
Coil Removal33
Aluminum Coil Removal34
Compressor Removal and Replacement35
System Clean-Up after Burnout35
Evacuation35
Check Charge36
TROUBLESHOOTING with SUPERHEAT37
Puron Refrigerant Pressure Temperature Chart41
Single-Stage Communicating Heat Pump System Functions and Sequence of Operation47
Sequence of Operation47
Defrost48
Quiet Shift-248
Liquid Line Solenoid Accessory49
Major Components49
Troubleshooting49
Systems Communication Failure49
Pressure Switch Protection49
Control Fault49
24V Brown out Protection49
Compressor Voltage Sensing49
Compressor Thermal Cutout or Loss of 230V Power49
Contactor Shorted Detection50
No 230V at Compressor50
Temperature Thermistors50
Thermistor Sensor Comparison50
Failed Thermistor Default Operation50
Status Codes50
Two-Stage 286B/289B 180B/187B52
Application Guidelines52
Model Plug52
Airflow Selections for 187B / 286B / 180B /289B Using Non-Communicating (Non-Evolution) Thermostats53
Ing Non-Communicating (Non-Evolution) Thermostats53
General Information53
Low Ambient Cooling53
Defrost53
Quiet Shift54
Quiet Shift-2 (Communicating Models) (Part # HK38EA016, HK38EA022, HK38EA023)54
Liquid-Line Solenoid Accessory54
Check Charge54
Heating Check Chart Procedure54
System Functions and Sequence of Operation (286B/89B/180B/187B)55
Cooling and Heating Operation55
Communication and Status Function Lights for Evolution Control Only, Green Communications (COMM) Light55
Utility Interface with Evolution Control55
Compressor Operation55
Fan Motor55
Time Delays56
Outdoor Temp (DC Volts, Tolerance +/- 2%)56
Pressure Switches57
Muffler, Accumulator, Reversing Valve (RVS)57
Thermistors57
Control Box57
Troubleshooting58
Troubleshooting Circuit Board58
Hk38Ea016, 022, 023, 02658
Systems Communication Failure58
Model Plug58
Pressure Switch Protection58
Control Fault58
Brown-Out Protection58
230V Brown-Out Protection Defeated59
230V Line (Power Disconnect) Detection59
Compressor Voltage Sensing59
Contactor Shorted Detection59
Compressor Thermal Cutout59
180B/187B/286B/289B59
Low or High Contactor Open/No 230V at Compressor Contractor59
Troubleshooting Units for Proper Switching59
Between Low & High Stages59
Unloader Test Procedure 180B/187B/286B/289B59
Temperature Thermistors60
Thermistor Sensor Comparison60
Failed Thermistor Default Operation60
Troubleshooting61
Two Stage Non-Communicating 127A/CA17/BA17CH17/BH17/226A62
Operating Ambient62
Airflow Selections (ECM Furnaces)62
Airflow Selection for Variable Speed Furnaces (Non-Communicating)62
Airflow Selection for FV4C Fan Coils (Non-Communicating)62
Airflow Selection for FZ4A Fan Coils (Non-Communicating)62
System Function and Sequence of Operation (127A/226A/CA17/CH17/BA17/BH17)63
Compressor Operation63
Quiet Shift63
Quiet Shift-2 (Non-Communicating)63
Defrost63
Defrost Speedup63
Check Charge64
Heating Check Chart Procedure64
Verify 226A / CH17 Units for Proper Switching between Low & High Stages64
Unloader Test Procedure64
Care and Maintenance65
Desert and Seacoast Locations65
Cleaning Coil65
Cleaning Outdoor Fan Motor and Blade65
Electrical Controls and Wiring66
Refrigerant Circuit66
Final Check-Out66
Index of Tables70

Bryant HK32EA007 - HEAT PUMP TROUBLESHOOTING COOLING CYCLE

Table of Contents

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