Bryant Evolution 284ANV Series

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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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Summary

Safety Precautions

Electrical Shock Hazard

Warning about potential injury or death from electrical shock during service.

Unit Operation and Safety Hazards

Hazards related to system operation, pressure, and rotating blades.

Variable Frequency Drive (VFD) System

Compressor and Fan Motor Control

How the VFD controls brushless permanent magnet motors for compressor and fan.

Control Sub-System and PCM

Primary Control Module (PCM)

The central control unit receiving sensor data and commanding system operation.

Control Features and Operation

Compressor and Fan Operation

Details on compressor starting, running, protection, and fan operation.

Defrost Mode and Diagnostics

Defrost Interval and Process

Setting defrost timing and the sequence of operations during defrost.

Troubleshooting and Diagnostics

Component Diagnostics

Compressor and Fan Diagnostics

Checking compressor winding resistance and fan motor connections.

Diagnostic Codes

Line Voltage and Communication Faults

VFD and Compressor Diagnostic Codes

Model Plug and VFD Faults

Compressor Pressure and Temperature Faults

Faults related to compressor pressure limits, temperature limits, and starting issues.

Compressor and Fan Faults

Compressor Start and Pump Faults

Diagnosing issues with compressor starting, differential pressure, and pumping.

Fan Motor Faults

Information on fan motor connections, wiring, and common fault codes.

Defrost, PEV, and Sensor Faults

Defrost Timeout and PEV Faults

Discharge, Suction, and Pressure Sensor Faults

ODT and OST Sensor Faults

Pressure Transducer (P1;P2) Faults

Diagnosing open, shorted, or sensor errors for pressure transducers.

VFD System Faults

VFD System Wiring and PFC Faults

VFD Voltage and Current Faults

Line Voltage and DC Voltage Faults

Troubleshooting high/low line voltage and DC under/over voltage errors.

Compressor Current Limit Faults

Diagnosing faults related to compressor current limits and overspeed conditions.

VFD Internal and Communication Faults

VFD Communication and Initialization Faults

Troubleshooting communication loss, initialization errors, and VFD resets.

VFD Internal Sensor Faults

Diagnosing errors related to IPM, DC link, and PFCM sensors.

VFD Temperature and Discharge Faults

VFD PFCM Temperature and DC Discharge Faults

Troubleshooting PFCM temperature sensor and DC discharge errors.

Refrigeration System Repair

Leak Detection Methods

Methods for finding refrigerant leaks using electronic detectors or soap solution.