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Bryant Evolution 284ANV048 User Manual

Bryant Evolution 284ANV048
40 pages
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Service Manual
Table of contents
PAGE NO. PAGE NO.
UNIT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Aluminum Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ELECTRICAL SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . 3
Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Compressor / Fan Sub-System . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Variable Frequency Drive (VFD) . . . . . . . . . . . . . . . . . . . . . . . . 5
VFD Filter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
High Pressure Switch (HPS). . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compressor Brushless Permanent Magnet Motor (BPM) . . . . . 5
VFD + Compressor BPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fan Brushless Permanent Magnet Motor (BPM) . . . . . . . . . . . . 5
VFD + Fan BPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CONTROL SUB-SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Primary Control Module (PCM). . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Connection (Communicating and Non-Communicating). 5
Communicating Evolution Control. . . . . . . . . . . . . . . . . . . . . . . 5
Non-Communicating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 1 – DIP Swtich Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PCM Indicators and Matrix Display . . . . . . . . . . . . . . . . . . . . . . 6
Model Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pressure Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
VFD Control Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pressure Equalization Valve (PEV) . . . . . . . . . . . . . . . . . . . . . . 8
Reversing Valve (RVS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Heating Electronic Expansion Valve (EXV-H) . . . . . . . . . . . . . 8
Bluetooth® Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Accessory Control Components. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Utility Curtailment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Liquid Line Solenoid Valve (LLS) . . . . . . . . . . . . . . . . . . . . . . . 8
CONTROL FEATURES AND OPERATION . . . . . . . . . . . . . . . . . . 9
Equipment Configuration (Model Plug) . . . . . . . . . . . . . . . . . . . . 9
Performance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Protect Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Running. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Reliability Protection . . . . . . . . . . . . . . . . . . . . . . . 9
Sump Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 9
Intermittent Low Fan Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fan Operating Exceptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Heating Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Super Heat Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Defrost Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Defrost Interval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Defrost Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PCM Indicators and Display Operation. . . . . . . . . . . . . . . . . . . . 10
Status Light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Comm Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
VFD Comm Light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Matrix Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Reprogrammability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TROUBLESHOOTING CONTROL FEATURES . . . . . . . . . . . 11
SYSTEM DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 2 – Model Plug Information. . . . . . . . . . . . . . . . . . . . . . . . 12
COMPONENT DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 3 – Variable Speed Compressor Resistances (ohm)
(winding resistance at 68°F /20°C) . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4 – DC Voltage and PWM Measurement . . . . . . . . . . . . . 13
Table 5 – Thermistor Resistance (k-ohms) vs. Temperature. . . . 13
DIAGNOSTIC CODES AND TROUBLESHOOTING . . . . . . . 15
Table 6 – Fault Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
REFRIGERATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Servicing Systems on Roofs With Synthetic Materials. . . . . . . . 34
Synthetic Roof Precautionary Procedure . . . . . . . . . . . . . . . . . 34
Brazing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Service Valves and Pumpdown . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Pumpdown & Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Pump Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Evacuation and Recovery of Refrigerant from 284ANV . . . . . 35
Reversing Valve (284ANV) . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Install Liquid-line Filter Drier Indoor. . . . . . . . . . . . . . . . . . . . 36
Suction Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Thermostatic Expansion Valve (TXV) . . . . . . . . . . . . . . . . . . . . 36
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Accumulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Vapor Injection Operation (5 Ton Models) . . . . . . . . . . . . . . . . . 37
Vapor Injection Electronic Exp. Valve (EXV VI)
(5 Ton Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
REFRIGERATION SYSTEM REPAIR. . . . . . . . . . . . . . . . . . . . . . 38
Leak Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
186CNV / 284ANV
Evolution™ Extreme
Variable Speed Air conditioner and Heat Pump
2 to 5 Nominal Tons
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Bryant Evolution 284ANV048 Specifications

General IconGeneral
TypeHeat Pump
Model284ANV048
BrandBryant
SeriesEvolution
Cooling Capacity (BTU/h)48000
Heating Capacity (BTU/h)48000
Cooling Capacity (tons)4
Heating Capacity (tons)4
SEER Rating20
HSPF Rating10
RefrigerantR-410A
StagesVariable
Voltage (V)208/230
Phase1
Compressor TypeVariable-Speed

Summary

Safety Considerations

General Information

Provides essential safety guidelines for installation, servicing, and handling electrical components.

Variable Frequency Drive (VFD) System

Compressor and Fan Motor Operation

Explains how BPM motors are controlled by the VFD for variable speed operation.

Control Sub-System Components

Primary Control Module (PCM)

The PCM is the central control unit managing operation and diagnostics.

Control Features and Operation

Equipment Configuration via Model Plug

How the PCM detects and uses the model plug for operation setup.

Compressor Operation Modes

Covers compressor start-up, running, and reliability protection features.

Troubleshooting and Diagnostics

Troubleshooting Control Features

Covers diagnostics display, forced defrost input, and code recall functions.

System Diagnostics Overview

Details 24VAC power distribution, communication loss, and model plug issues.

Component Diagnostics

Thermistor Resistance and Diagnostics

Explains thermistor function, resistance values, and diagnostic codes.

Pressure Sensor Functionality

Details pressure transducer function and troubleshooting procedures.

Diagnostic Codes and Troubleshooting

Line Voltage Faults

Covers faults related to low and high incoming line voltage.

Communication and Freeze Protection Faults

Details faults for Bluetooth communication and indoor coil freeze protection.

Model Plug and PCM Faults

Covers faults related to model plug status and PCM MCU version.

Specific Fault Code Troubleshooting

Fuse and Pressure Limit Faults

Troubleshooting for fuse failures and compressor pressure limits.

Low Suction and Discharge Faults

Addresses faults related to low suction and discharge pressures.

Temperature and Compressor Faults

Covers high temp, high compression, and low compression faults.

VFD and Fan Motor Faults

Troubleshooting for VFD compressor start, estimator, and fan motor issues.

Additional Diagnostic Codes

Fan Start and Speed Errors

Covers fan start failures, speed errors, and unexpected shutdowns.

Thermistor Open/Shorted Faults

Details faults for OAT, OCT, and ODT thermistor readings.

Sensor and Valve Fault Codes

OST and ODT Sensor Faults

Covers faults related to OST and ODT sensor open/shorted conditions.

Pressure Transducer Faults (P1/P2)

Details faults for P1 and P2 pressure sensor open, shorted, or error conditions.

Refrigerant System Faults

VFD System Faults

VFD Compressor and Voltage Faults

VFD Internal Faults and Lockouts

Refrigeration System

Refrigerant and Compressor Oil Handling

Safety warnings and guidelines for refrigerant and PVE compressor oil.

Refrigerant Handling Procedures

Refrigeration System Repair Procedures

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