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Daikin ComfortNet DX18TC0481BB User Manual

Daikin ComfortNet DX18TC0481BB
101 pages
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1
Service Instructions
ComfortNet™
DX16TC & DX18TC Condensing Units,
DZ16TC & DZ18TC Split System Heat Pumps
with R-410A Refrigerant
Blowers, Coils, & Accessories
This manual is to be used by qualied, professionally trained HVAC technicians only. Goodman
does not assume any responsibility for property damage or personal injury due to improper
service procedures or services performed by an unqualied person.
Copyright © 2015-2020 Daikin Manufacturing Company, L.P.
RSD6200007r21
March 2020

Table of Contents

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Daikin ComfortNet DX18TC0481BB Specifications

General IconGeneral
BrandDaikin
ModelComfortNet DX18TC0481BB
CategoryAir Conditioner
LanguageEnglish

Summary

Important Information

Important Information

Safe Refrigerant Handling

Guidelines for safe handling of refrigerants, including warnings and precautions against breathing hazards and frostbite.

ACCESSORIES

ACCESSORIES

PRODUCT DESIGN

SYSTEM OPERATION

SYSTEM OPERATION

Defrost Cycle - ComfortNet™ Models

Details the defrost cycle control for ComfortNet™ models, including timing, sensors, and termination.

TROUBLESHOOTING CHART

Cooling/HP Analysis Chart

Provides a chart of possible causes, symptoms, and test methods for cooling/heat pump issues.

SERVICING

Checking Voltage and Wiring

Details procedures for checking voltage, wiring integrity, and thermostat compatibility.

Compressor Checks

Details safety precautions and procedures for checking compressor windings and ground resistance.

Leak Testing and Evacuation Procedures

Describes leak testing with nitrogen and system evacuation procedures.

Refrigerant Charging and Expansion Valve System

Provides guidance on refrigerant charging and expansion valve system adjustments.

Compressor Efficiency, Overfeeding, Underfeeding, and Superheat

Covers checking compressor efficiency, expansion valve issues, and superheat.

Subcooling, Expansion Valve Operation, and Liquid Line Checks

Details subcooling checks, expansion valve operation, and restricted liquid line diagnosis.

Compressor Burnout and Refrigerant Piping

Discusses compressor burnout causes, cleaning, and refrigerant piping importance.

Communications Troubleshooting Chart

Provides a chart for troubleshooting network communication issues using LED indicators.

Unitary Diagnostic Codes Overview

Provides a comprehensive table of unitary diagnostic codes, fault descriptions, and possible causes.

SERVICING

Pressure Control Checks

Details procedures for checking high pressure, low pressure controls, and switch voltage.

Capacitor Checks and ECM Motor Diagnosis

Explains capacitor checks and general checks for Emerson ECM motors.

Emerson UltraCheck-EZ™ Diagnostic Tool

Explains how to use the Emerson UltraCheck-EZ™ tool to diagnose ECM motors.

SERVICING

SERVICING

WIRING DIAGRAMS

WIRING DIAGRAMS

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