Daikin DZ18TC0481 - User Manual

I MPORTANT S AFETY I NSTRUCTIONS
The following symbols and labels are used throughout this manual
to indicate immediate or potential safety hazards. It is the owner’s
and installer’s responsibility to read and comply with all safety
information and instructions accompanying these symbols. Fail-
ure to heed safety information increases the risk of personal in-
jury, property damage, and/or product damage.
HIGH VOLTAGE!
D ISCONNECT ALL POWER BEFORE SERVICING .
M
ULTIPLE POWER SOURCES MAY BE PRESENT . F AILURE
TO DO SO MAY CAUSE PROPERTY DAMAGE , PERSONAL
INJURY OR DEATH .
WARNING
Only personnel that have been trained to install, adjust, service
or repair (hereinafter, “service”) the equipment specified in this
manual should service the equipment. The manufacturer will not
be responsible for any injury or property damage arising from
improper service or service procedures. If you service this unit,
you assume responsibility for any injury or property damage
which may result. In addition, in jurisdictions that require one or
more licenses to service the equipment specified in this manual,
only licensed personnel should service the equipment. Improper
installation, adjustment, servicing or repair of the equipment
specified in this manual, or attempting to install, adjust, service
or repair the equipment specified in this manual without proper
training may result in product damage, property damage,
personal injury or death.
S CROLL EQUIPPED UNITS SHOULD NEVER BE USED TO EVACUATE THE AIR
CONDITIONING SYSTEM . V ACUUMS THIS LOW CAN CAUSE INTERNAL
ELECTRICAL ARCING RESULTING IN A DAMAGED OR FAILED
COMPRESSOR .
CAUTION
CONDENSING UNIT
HEAT PUMP
INSTALLATION & SERVICE REFERENCE
S HIPPING I NSPECTION
Always keep the unit upright; laying the unit on its side or top may
cause equipment damage. Shipping damage, and subsequent in-
vestigation is the responsibility of the carrier. Verify the model
number, specifications, electrical characteristics, and accesso-
ries are correct prior to installation. The distributor or manufac-
turer will not accept claims from dealers for transportation dam-
age or installation of incorrectly shipped units.
C ODES & R EGULATIONS
This product is designed and manufactured to comply with na-
tional codes. Installation in accordance with such codes and/or
prevailing local codes/regulations is the responsibility of the in-
staller. The manufacturer assumes no responsibility for equip-
ment installed in violation of any codes or regulations. Rated
performance is achieved after 72 hours of operation. Rated per-
formance is delivered at the specified airflow. See outdoor unit
specification sheet for split system models or product specifica-
tion sheet for packaged and light commercial models. Specifica-
tion sheets can be found at www.daikincomfort.com for Daikin
brand products. Within the website, please select the residen-
tial or commercial products menu and then select the submenu
for the type of product to be installed, such as air conditioners or
heat pumps, to access a list of product pages that each contain
links to that model’s specification sheet.
The United States Environmental Protection Agency (EPA) has is-
sued various regulations regarding the introduction and disposal
of refrigerants. Failure to follow these regulations may harm the
environment and can lead to the imposition of substantial fines.
T HIS UNIT IS EQUIPPED WITH A 24 VAC TRANSFORMER THAT POWERS
THE HEAT PUMP CONTROL BOARD . W HEN INSTALLED AS A
COMMUNICATING SYSTEM , ONLY 2 WIRES ARE NEEDED BETWEEN
INDOOR AND OUTDOOR EQUIPMENT . H OWEVER , WHEN INSTALLED AS
A NON - COMMUNICATING ( LEGACY ) SYSTEM , THE TRANSFORMER
WIRING ( LOW VOLTAGE AND LINE VOLTAGE ) MUST BE DISCONNECTED .
R
EFER TO THE LOW VOLTAGE WIRING SECTION FOR MORE DETAILS .
NOTICE
INSTALLATION INSTRUCTIONS
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2013-2014, 2016-2017
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikincomfort.com
IOD-4009F
9/2017
“IMPORTANT - This product has been designed and manufactured to meet ENERGY STAR®
criteria for energy efficiency when matched with appropriate coil components. However,
proper refrigerant charge and proper air flow are critical to achieve rated capacity and
efficiency. Installation of this product should follow the manufacturer’s refrigerant charging
and air flow instructions. Failure to confirm proper charge and air flow may reduce energy
efficiency and shorten equipment life.”

Summary

Daikin Condensing Unit Installation and Service Reference

Important Safety Instructions

Crucial safety warnings and symbols used throughout the manual for hazard identification.

High Voltage Safety Warning

Warning about disconnecting all power before servicing due to high voltage hazards.

Servicing Personnel Training Requirement

Emphasizes the need for trained and licensed personnel for equipment servicing.

Scroll Unit Evacuation Caution

Refrigerant Lines Safe Handling and Connections

POE Oil Moisture Sensitivity Caution

Safe Refrigerant Handling Procedures

Essential safety guidelines for handling refrigerants, including avoiding contact and purging.

Refrigerant Safety and Properties Warnings

Warnings about refrigerant properties like being heavier than air and safe handling practices.

Refrigerant Cylinder Safety Precautions

Warnings about potential explosions when handling refrigerant cylinders.

Refrigerant Line Connection Notes

Leak Testing Safety and Procedures

Warnings about leak testing methods and procedures for using dry nitrogen.

System Evacuation Process

Refrigerant Pressure Hazard Warning

Warning about refrigerant pressure and potential damage, injury, or death during handling.

Electrical Connections and System Start-Up

Prolonged Low Suction Pressure Caution

Caution regarding prolonged operation at low suction pressures causing damage to scroll components.

Electrical Connections Guidelines

Low Voltage Wiring Connections

High Voltage Safety Precautions

Warning about high voltage hazards during servicing, emphasizing power disconnection.

System Start-Up Procedures

Refrigerant Leak During Start-Up Caution

Caution about possible refrigerant leaks when opening service valves by slightly backing stems.

Refrigerant Pressure Operating Warnings

Warnings about overcharging and operating the unit in a vacuum, which can cause damage.

Refrigerant Charge Adjustment and Heating Cycle

Refrigerant Handling and Charging Cautions

Cautions regarding handling refrigerant, connecting/disconnecting hoses, and venting.

Final Refrigerant Charge Adjustment

ComfortNet System Detailed Operation

System Diagnostics and Troubleshooting Menus

Accessing Diagnostics Menus

Accessing the air conditioner/heat pump's diagnostics menu for fault history.

Cool Set-up and Heat Set-up Adjustments

System Troubleshooting Overview

Using on-board tools like LEDs and the learn button to troubleshoot the ComfortNet system network.

Unitary Diagnostic Codes Explanation

Status indications and troubleshooting for the red and green communication LEDs.

Condensing Unit Troubleshooting Guide

Table mapping symptoms to possible causes, test methods, and remedies for unit issues.

Unitary Diagnostic Codes Detailed Troubleshooting

System Troubleshooting Code Interpretation

Unitary diagnostic codes and their corresponding symptoms, possible causes, and corrective actions.

System Mis-Match Diagnosis and Repair

Low Side and High Side Fault Resolution

Pressure Cut Out Trip and Lockout Troubleshooting

Cycling and Rotor Fault Troubleshooting

Circuit and Voltage Fault Diagnosis

Voltage and Protector Fault Resolution

Daikin DZ18TC0481 Specifications

General

Type	Heat Pump
SEER Rating	18
Refrigerant	R-410A
Voltage	208/230V
Phase	1
Compressor Type	Scroll
Cooling Capacity	48000 BTU/h
Weight (Indoor Unit)	Varies with model
Stages	Single
Heating Capacity	48000 BTU/h